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D20/D200 Technical Overview PRPI-019 Version 3.00 Revision 10

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D20/D200 Technical Overview GE Grid Solutions

ii PRPI-019-3.00-10 GE Information

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GE Grid Solutions D20/D200 Technical Overview

GE Information PRPI-019-3.00-10 iii

Contents

About this Document .....................................................................................................................1

Purpose ........................................................................................................................................ 1 Who Should Use this Document? ............................................................................................... 2 Additional Documentation .......................................................................................................... 2

Product Support .............................................................................................................................3

GE Grid Solutions Web Site ....................................................................................................... 3 GE Technical Support Library .................................................................................................... 3 Contact Technical Support .......................................................................................................... 3

What’s New.....................................................................................................................................4

D20ME II Main Processor .......................................................................................................... 4 D20EME (Ethernet/Memory Expansion) ................................................................................... 5 New D20/D200 I/O Peripherals .................................................................................................. 5

D20AC, AC Analog Input Peripheral ..................................................................................... 5 D20 High-Voltage Peripherals ................................................................................................ 6 D20K4Z Termination Module ................................................................................................ 6

New Power Supplies ................................................................................................................... 6 Multiple Language Support ........................................................................................................ 7

1. System Overview ........................................................................................................................8

1.1 System Architecture ............................................................................................................ 9 1.2 Hardware Design ................................................................................................................ 9 1.3 D20/D200 Product Comparison ........................................................................................ 10 1.4 D20 RTU Platform ............................................................................................................ 10 1.5 D200 Substation Automation Platform ............................................................................. 13

1.5.1 D200 Features .............................................................................................................. 13 1.6 D20/D200 RTU Hardware ................................................................................................ 16

1.6.1 Chassis ......................................................................................................................... 16 1.6.2 Main Processor ............................................................................................................. 17 1.6.3 Ethernet/Memory Expansion (EME) Kit ..................................................................... 19 1.6.4 Power Supplies ............................................................................................................. 19 1.6.5 Modems ........................................................................................................................ 20

1.7 I/O Peripherals .................................................................................................................. 20 1.8 Auxiliary Equipment ......................................................................................................... 21 1.9 Communications ............................................................................................................... 21 1.10 Firmware ........................................................................................................................... 22 1.11 Configuration and Maintenance Software ........................................................................ 22


iv PRPI-019-3.00-10 GE Information

1.12 System Documentation ..................................................................................................... 22

2. Detailed Technical Description ...............................................................................................25

2.1 Mechanical Design and Packaging ................................................................................... 25 2.1.1 General ......................................................................................................................... 25 2.1.2 Enclosure ...................................................................................................................... 26 2.1.3 Chassis ......................................................................................................................... 26 2.1.4 Peripheral I/O Module Assembly ................................................................................ 28 2.1.5 Environmental .............................................................................................................. 29

2.2 Main Processor.................................................................................................................. 30 2.2.1 Hardware ...................................................................................................................... 30 2.2.2 D20/D200 Main Processor Specifications ................................................................... 31 2.2.3 Firmware ...................................................................................................................... 32 2.2.4 Time Synchronization .................................................................................................. 34

2.3 Ethernet/Memory Expansion (EME) Kit .......................................................................... 36 2.4 I/O Peripheral Modules ..................................................................................................... 37

2.4.1 Types of I/O Peripherals .............................................................................................. 37 2.4.2 Termination Types ....................................................................................................... 38 2.4.3 Hardware ...................................................................................................................... 40 2.4.4 Firmware ...................................................................................................................... 41 2.4.5 I/O Processing .............................................................................................................. 43 2.4.6 D20S Digital Input Peripheral ..................................................................................... 44 2.4.7 D20A Analog Input Peripheral .................................................................................... 48 2.4.8 D20K Control Output Peripheral ................................................................................. 53 2.4.9 Interposing Relay Panel ............................................................................................... 57 2.4.10 D20C Combination I/O Peripheral ............................................................................ 59 2.4.11 D20AC, AC Analog Input Peripheral ........................................................................ 62

2.5 D20/D200 Power Supplies and Chargers ......................................................................... 64 2.5.1 D20 Power Supply Specifications ............................................................................... 65 2.5.2 D20 Battery Chargers .................................................................................................. 66

2.6 D20 Modems ..................................................................................................................... 67 2.6.1 WESDAC 202/V.23 Modem Specifications ................................................................ 68

2.7 Communications ............................................................................................................... 69 2.8 D.20 Link .......................................................................................................................... 70

2.8.1 Designing a Distributed D20 Network......................................................................... 71 2.8.2 D.20 Communication Interface .................................................................................... 72 2.8.3 Adapter Modules .......................................................................................................... 73 2.8.4 D.20 Fiber Optic Splitter .............................................................................................. 73 2.8.5 Communication Cables ................................................................................................ 74 2.8.6 Power Requirements .................................................................................................... 75

2.9 Redundancy....................................................................................................................... 75 2.9.1 D20/D200 Redundancy ................................................................................................ 76 2.9.2 D.20 Link Redundancy ................................................................................................ 77

2.10 Auxiliary Equipment ......................................................................................................... 78 2.10.1 Universal Protocol Converter .................................................................................... 78 2.10.2 Data Display Panel ..................................................................................................... 79


GE Information PRPI-019-3.00-10 v

2.10.3 Fiber Optic Interfaces................................................................................................. 79

3. Configuration and Maintenance Software ............................................................................80

3.1 SGConfig .......................................................................................................................... 80 3.2 LogicLinx .......................................................................................................................... 80 3.3 WESMAINT ..................................................................................................................... 80 3.4 PROMAINT ...................................................................................................................... 81 3.5 68K Monitor...................................................................................................................... 81

4. Application Software ...............................................................................................................82

4.1 User Programmable Logic ................................................................................................ 82 4.2 Generation, Transmission, and Feeder Bay Automation Applications............................. 82 4.3 Distribution Automation Applications .............................................................................. 82 4.4 Communication Services Applications ............................................................................. 83 4.5 Data Logging / Storage Applications ................................................................................ 83 4.6 Data Reduction and Summarizing Applications ............................................................... 83 4.7 Data Conversion Applications .......................................................................................... 84 4.8 Other DTAs ....................................................................................................................... 84

5. Frequently Asked Questions ...................................................................................................85

5.1 What is the performance of the D20 and D200?............................................................... 85 5.2 What is the difference between the D20 and the D200? ................................................... 85 5.3 Will VME cards work with my non-VME systems? ........................................................ 85 5.4 What is the I/O capacity of a D20 system? ....................................................................... 86 5.5 What is the I/O capacity of a D200 system? ..................................................................... 86 5.6 What are the added features of the ME II Main Processor over the ME Main Processor? 86

A. Specifications and Supported Standards ..............................................................................87

B. Supported Host Protocols .......................................................................................................90

C. Supported IED Protocols........................................................................................................91

D. Power Consumption – D20 Modules .....................................................................................92

E. D20/D200 Main Processor Compatibility .............................................................................93

F. D.20 Link Installation .............................................................................................................94


vi PRPI-019-3.00-10 GE Information

Figures

Figure 1 D20ME II Main Processor.............................................................................................. 4

Figure 2 D20EME (Ethernet/Memory Expansion) ....................................................................... 5

Figure 3 GE Integrated Substation Control System ...................................................................... 8

Figure 4 D20 System Architecture ............................................................................................. 11

Figure 5 Example D20 Rack Layout .......................................................................................... 12

Figure 6 D200 Substation Automation Platform ........................................................................ 13

Figure 7 D200 System Architecture ........................................................................................... 14

Figure 8 Example D200 Rack Layout ........................................................................................ 15

Figure 9 D20 Perspective Drawing ............................................................................................. 16

Figure 10 D200 Perspective Drawing ......................................................................................... 17

Figure 11 D20ME II Main Processor.......................................................................................... 18

Figure 12 D20EME (Ethernet/Memory Expansion) ................................................................... 19

Figure 13 D20/D200 Chassis Mounted Power Supplies............................................................. 19

Figure 14 D20A I/O Peripheral................................................................................................... 20

Figure 15 D20 Chassis (non-VME version) ............................................................................... 27

Figure 16 D20 Chassis (VME version) ....................................................................................... 27

Figure 17 D200 Chassis .............................................................................................................. 28

Figure 18 D20 Peripheral I/O Module ........................................................................................ 29

Figure 19 D20ME Block Diagram .............................................................................................. 30

Figure 20 D20/D200 Time Synchronization............................................................................... 35

Figure 21 Demodulated IRIG B Signal ...................................................................................... 35

Figure 22 D20EME (Ethernet/Memory Expansion) ................................................................... 36

Figure 23 D20 I/O Peripheral - Compression Termination ........................................................ 38

Figure 24 D20 I/O Peripheral – DB25 Termination ................................................................... 38

Figure 25 D20 I/O Peripheral – Disconnect Termination ........................................................... 39

Figure 26 D20 I/O Peripheral – Barrier Termination ................................................................. 39

Figure 27 D20 Peripheral I/O Block Diagram ............................................................................ 40

Figure 28 D20S Digital Input Peripheral .................................................................................... 44


GE Information PRPI-019-3.00-10 vii

Figure 29 D20S Digital Input Peripheral Block Diagram .......................................................... 45

Figure 30 D20A Analog Input Peripheral ................................................................................... 48

Figure 31 D20A Analog Input Peripheral Block Diagram ......................................................... 49

Figure 32 Analog Conversion Process ........................................................................................ 49

Figure 33 Three-point Linearity Correction ............................................................................... 51

Figure 34 D20K Control Output Peripheral................................................................................ 53

Figure 35 Interposing Relays ...................................................................................................... 58

Figure 36 D20 Power Supply ...................................................................................................... 64

Figure 37 D200 Power Supplies ................................................................................................. 65

Figure 38 D.20 Link Example Configuration ............................................................................. 71

Figure 39 D.20 Communications Interface ................................................................................. 72

Figure 40 D.20 Communication Interface .................................................................................. 72

Figure 41 DCI Modes of Operation ............................................................................................ 73

Figure 42 D.20 Fiber Optic Splitter ............................................................................................ 73

Figure 43 D.20 Fiber Optic Splitter ............................................................................................ 74

Figure 44 D200 Redundancy ...................................................................................................... 76

Figure 45 Single D20/D200 with Loop Redundancy ................................................................. 77

Figure 46 Single D20/D200 with Redundant LAN .................................................................... 78

Figure 47 Data Display Panel ..................................................................................................... 79


viii PRPI-019-3.00-10 GE Information

Tables

Table 1 D20/D200 Power Supply Replacements.......................................................................... 6

Table 2 D20/D200 Product Comparison...................................................................................... 10

Table 3 D20/D200 Power Supplies............................................................................................. 20

Table 4 D20/D200 Main Processor Specifications ..................................................................... 31

Table 5 D20/D200 Ethernet Media Types .................................................................................. 36

Table 6 D20/D200 I/O Peripherals ............................................................................................. 37

Table 7 I/O Processing ................................................................................................................. 43

Table 8 D20S Specifications ....................................................................................................... 47

Table 9 D20S Options ................................................................................................................. 47

Table 10 D20A Specifications .................................................................................................... 52

Table 11 D20A Options .............................................................................................................. 53

Table 12 D20K Specifications .................................................................................................... 56

Table 13 D20K Options .............................................................................................................. 57

Table 14 D20KI Options ............................................................................................................. 58

Table 15 D20C Daughter Boards ................................................................................................ 59

Table 16 D20C Specifications .................................................................................................... 60

Table 17 D20C Options .............................................................................................................. 61

Table 18 D20AC Features and Specifications ............................................................................ 62

Table 19 D20AC Options ........................................................................................................... 63

Table 20 D20/D200 Power Supplies........................................................................................... 65

Table 21 D20/D200 Battery Chargers ........................................................................................ 66

Table 22 D20/D200 Modems...................................................................................................... 67

Table 23 WESDAC 202/V.23 Modem Specifications ............................................................... 68

Table 24 D20/D200 Communications Links .............................................................................. 69

Table 25 D20/D200 Fiber Optic Links ....................................................................................... 79


GE Information PRPI-019-3.00-10 1

About this Document

Purpose This document provides a technical overview of the D20/D200 Remote Terminal Unit (RTU). The document is organized as follows:

• What’s New: This section highlights recent additions and enhancements that have been made to the D20/D200 product line.

• 1. System Overview: This section provides an overview of the D20/D200 system hardware and software.

• 2. Detailed Technical Description: This section provides a detailed description of the D20/D200 hardware, software and operation.

• 3. Configuration and Maintenance Software: This section describes utilities and applications that are available to help you configure, manage and maintain your D20/D200 system.

• 4. Application Software: This section describes some of the substation automation and SCADA applications that are available for the D20/D200.

• 5. Frequently Asked Questions: This appendix presents answers to frequently asked questions about the D20/D200.

• A. Specifications and Supported Standards: This appendix lists key industry specifications with which the D20/D200 complies.

• B. Supported Host Protocols: This appendix lists SCADA host protocols supported by the D20/D200.

• C. Supported IED Protocols: This appendix lists IED protocols supported by the D20/D200.

• D. Power Consumption – D20 Modules This appendix lists nominal power consumption for D20 components, for use in power calculations.

• E. D20/D200 Main Processor Compatibility: This appendix shows the compatibility of D20 processors with the D20/D200 chassis.

• F. D.20 Link Installation: This appendix provides guidelines on planning and installing a D.20 Link.


2 PRPI-019-3.00-10 GE Information

Who Should Use this Document? This document is a helpful resource for utility customers or GE partners who are purchasing or evaluating a remote terminal unit or substation control system. It is intended for readers who have knowledge of substation automation equipment and applications.

Additional Documentation For further information about the D20/D200 product family, refer to the following documents:

• D20/D200 Installation and Operation Guide (994-0078)

• D20, D25, iBOX Automation Applications (PRPI-048)



Product Support

If you need help with any aspect of your GE Grid Solutions product, you can: • Access the GE Grid Solutions Web site • Search the GE Grid Solutions Technical Support library • Contact GE Grid Solutions Technical Support

GE Grid Solutions Web Site The GE Grid Solutions Web site provides fast access to technical information, such as manuals, release notes and knowledge base topics.

Visit us on the Web at: http://www.gegridsolutions.com

GE Technical Support Library This site serves as a document repository for post-sales requests. To get access to the Technical Support Web site, go to:

http://sc.ge.com/*SASTechSupport

Contact Technical Support The GE Grid Solutions Technical Support is open 24 hours a day, seven days a week for you to talk directly to a GE representative. In the U.S. and Canada, call toll-free: 1 800 547 8629 International customers, please call: +1 905 927 7070 or email to [email protected]

Have the following information ready to give to Customer Service:

• Ship to address (the address that the product is to be returned to) • Bill to address (the address that the invoice is to be sent to) • Contact name • Contact phone number • Contact fax number • Contact e-mail address • Product number / serial number • Description of problem

The Technical Support centre will provide you with a case number for your reference.

http://www.gegridsolutions.com/

http://sc.ge.com/*SASTechSupport

mailto:[email protected]



What’s New

GE Grid Solutions is pleased to announce the following additions to the D20/D200 product family:

D20ME II Main Processor The D20ME II, the fifth generation of D20/D200 processors, builds on the increased memory, performance and communication port speed introduced with the D20ME. Where the D20ME supports up to eight RS-232 serial ports (one of which is reserved for the maintenance port), the D20ME II supports:

• Seven serial ports, each of which can be configured as either RS-485 or RS-232, and

• One RS-232 maintenance port.

Each D20ME II RS-485 port can communicate with up to 32 devices and operate over distances up to 4000 feet, without the use of repeaters (see note below). The D20ME II is backwards compatible with VME and non-VME versions of the D20 chassis, and with the D200 chassis. For more information, see section 2.2, Main Processor.

Figure 1 D20ME II Main Processor

Note: The RS-485 port on the D20ME II provides no isolation and offers limited built-in transient suppression. If you are using the D20ME II in an environment where longer cable runs with larger transients are expected, installation of an external transient suppression device is recommended to protect the RTU. In addition, GE recommends the installation of an external transient suppression device when the RS-485 communication cable must be run to devices located outside of the RTU cabinet containing the D20ME II. Contact Customer Service for additional information.



D20EME (Ethernet/Memory Expansion) The D20EME is a VME-based module that combines Ethernet support and global memory expansion.

Figure 2 D20EME (Ethernet/Memory Expansion)

The D20EME allows VME-based D20 and D200 systems to be connected directly to any 10 MB Ethernet-based network. Available configurations of the D20EME module include:

• Ethernet only

• Memory only

• Ethernet and Memory For more information, see section 2.3, Ethernet/Memory Expansion (EME) Kit.

New D20/D200 I/O Peripherals Several new I/O peripherals have been added to the D20/D200 product family.

D20AC, AC Analog Input Peripheral The D20AC, AC analog input peripheral provides AC analog computing and monitoring. It has the following features:

• Up to 132 analog values and 18 accumulator values

• Direct AC analog inputs from current and voltage transformers for up to three 3-phase circuits, eliminating the need for transducers and/or metering IEDs

• Integrated key substation functions such as metering, analog processing and power quality measurement

• 3-element and 1-element (balanced system) metering

• Meter calculations include kW, kVArs, kVA, power factor, frequency, kWh, kVARh, kVAh and symmetrical components.

• Power quality data: %THD (total harmonic distortion), 21st harmonic For more information, see section 2.4.11 , D20AC, AC Analog Input Peripheral.



D20 High-Voltage Peripherals D20 high-voltage peripherals provide an extra level of protection for your system. They are packaged similar to the standard D20 I/O peripherals, but the input and output circuits are conditioned to handle higher voltages. For instance, the high-voltage version of the D20S, the D20 SZ, supports ON thresholds of up to 220 VDC. For more information, see section 2.4, I/O Peripheral.

D20K4Z Termination Module The WESTERM D20K4Z is the termination panel for the D20K4Z high-voltage control output module. As well as providing outputs that can withstand higher voltages, all of the control relays on the D20K4Z termination module are 4-pole, momentary contact, so that both sides of an interposer coil can be switched for additional control security. For more information, see section 2.4, I/O Peripheral.

New Power Supplies GE Grid Solutions has introduced several new D20/D200 power supplies that provide additional capacity and improved standards compliance. The new power supplies are designed to be drop-in replacements for the existing D20 power supplies. As shown in the following tables, each of the existing power supplies has two possible replacements, one with a 24 V isolated output, and one with a 48 V isolated output. For more information, see section 2.5, D20/D200 Power Supplies and Chargers.

Table 1 D20/D200 Power Supply Replacements

Supply Phased Out Drop In Replacement Alternative Replacement

Part Number 580-0240 580-2006 580-2007

Input Voltage Range 90-135 VAC 100-300 VDC or 85-264 VAC

100-300 VDC or 85-264 VAC

+5 V Current 5 A 7 A 7 A


-12 V Current ½ A 1 A 1 A

ISO V/I 24 V/3 A 24 V/3 A 48 V/1½ A



Supply Phased Out Drop In Replacement Alternative Replacement

Part Number 580-0241 580-2006 580-2007

Input Voltage Range 100-150 VDC 100-300 VDC or 85-264 VAC

100-300 VDC or 85-264 VAC




ISO V/I 24 V/½ A 24 V/3 A 48 V/1½ A

Supply Phased Out Drop In Replacement

Alternative Replacement

Part Number 580-0296 580-2004 580-2005

Input Voltage Range 20-60 VDC 20-60 VDC 20-60 VDC




ISO V/I 24 V/½ A 24 V/3 A 48 V/1½ A

Supply Phased Out Drop In Replacement

Alternative Replacement

Part Number 580-0297 580-2007 580-2006

Input Voltage Range

100–300 VDC or 90–265 VAC

100-300 VDC or 85-264 VAC

100-300 VDC or 85-264 VAC




ISO V/I 48 V/1½ A 48 V/1½ A 24 V/3 A

Multiple Language Support To meet the needs of our international customers, GE Grid Solutions has added multiple language support to many of our software products that complement the D20/D200, including PowerLink, SGConfig and WESMAINT. These products can be supplied in other languages by request so that end users, such as system operators, can work efficiently in their native language. Contact GE Grid Solutions for details.



1. System Overview This section provides an overview of the D20/D200 system hardware and software. More detailed technical information can be found in 2. Detailed Technical Description. The D20/D200 is the heart of GE Grid Solutions’s iSCS (Integrated Substation Control System), as illustrated in Figure 3.

Figure 3 GE Integrated Substation Control System

The D20/D200 provides substation server functionality in a mission-critical, substation-hardened package. The D20/D200 has a distributed architecture for gathering data from, and controlling, substation equipment. The D20/D200 is available with a broad range of: • SCADA host protocols (see C. Supported Host Protocols) • IED protocols (see D. Supported IED Protocols) • Communication options (see section 2.7, Communications) • Input/output (I/O) peripheral modules (see section 2.4, I/O Peripheral) • Operation and maintenance utilities (see 3. Configuration and Maintenance Software) • Substation automation applications (see 4. Application Software)



1.1 System Architecture The D20/D200 is based on a distributed processing architecture that consists of one or more main processors, peripheral I/O modules, termination panels, power supplies and communications equipment.

The main components of a D20/D200 system are: • D20/D200 main chassis, equipped with processor(s), power supply, RS-232/485 ports • Input/output peripheral modules • Auxiliary equipment • Communications interfaces • Application firmware • Configuration and maintenance software • User manuals The main processor communicates with I/O peripherals over proprietary high-speed D.20 communications links. General-purpose RS-232 and RS-485 serial ports provide communications with a variety of external devices, including substation equipment (IEDs, for example), local printers, operator terminals, and SCADA computers.

Field data acquired by the D20/D200 is maintained in the system database, where it can be accessed and processed by different application programs.

1.2 Hardware Design The D20 and D200 hardware designs are based on: • Distributed processing architecture which permits the sharing of I/O data processing between

the main processor and I/O peripheral processors • CMOS logic devices for low power consumption, noise immunity and high reliability • Advanced 32-bit Freescale™ 68030 (D20ME and ME II) and 68HC11 (D20 I/O peripherals)

single-chip microcontrollers • Programmable logic devices (PLD) to provide flexibility and reliability, and to reduce the

physical space taken up by logic circuits • 9600-baud maintenance port • D.20 HDLC link over a shielded cable or a glass/plastic fiber optic cable The modular design of the D20/D200 allows for easy expansion when you need additional processing power or communication ports.



1.3 D20/D200 Product Comparison Table 2 summarizes the key differences between the D20 and the D200.

Table 2 D20/D200 Product Comparison

D20 D200

Maximum Processor Boards

1 - non-VME chassis 3 - VME chassis

7

Maximum I/O Boards 31 (without repeaters)

120 (with repeaters)

124 (without repeaters)

480 (with repeaters)

VME Backplane Optional Standard

Maximum Serial Ports 7 + 1 Maintenance Port – Non-VME chassis

21 + 3 Maintenance Port – VME chassis

49 + 7 maintenance ports

Base Software Standard D20 Base, CCU Base CCU Base

Applications Software Full suite of GE Grid Solutions automation application software and protocols

Full suite of GE Grid Solutions automation application software and protocols

Typical Number of Applications *

5 - 7 * 5 - 7 per node *

* Each D20/D200 application has specific memory and processing requirements. The number of applications that can be supported is therefore system-specific, and this will be determined during system engineering. If the applications you require are particularly processor or memory-intensive, the number that can be supported may be less than that shown in Table 2. Likewise, if the applications are not particularly processor or memory-intensive, the number that can be supported may be higher than that shown. Contact GE Grid Solutions for further information.

1.4 D20 RTU Platform There are two types of D20 RTU masters:

• Single-slot (or non-VME) – One processor

• Five-slot VME – Up to three processors plus Ethernet The D20 hardware consists of a rack-mountable chassis containing one or more processor boards, power supplies and modems. As shown in Figure 4, the D20 interfaces with substation equipment either through peripheral I/O modules, or directly through RS-232, RS-485, or Ethernet links.



The D20 can support up to:

• Two D.20 ports, each supporting up to 31 I/O peripherals, without repeaters, and 120 I/O peripherals, with repeaters

• 21 RS-232 or RS-485 ports (7 per processor board)

• Two Ethernet channels

Figure 4 D20 System Architecture



An example of a D20 rack layout is shown in Figure 5.

1

10

20

30

42

40

Optional second 7 COM portpanel

UPC

WESDAC D20AWESTERM D20A

DUCT PANEL

WESDAC D20SWESTERM D20S

DUCT PANEL

WESDAC D20KWESTERM D20K

DUCT PANEL

D20 CHASSIS(with 7 COM ports)

Figure 5 Example D20 Rack Layout



1.5 D200 Substation Automation Platform The D200 has the computing power and expandability needed to provide substation automation in larger substations. This is achieved through an innovative design that employs multiple D20 processors, communicating over a VME bus.

Figure 6 D200 Substation Automation Platform

The D200 has the processing power to monitor and control thousands of I/O points. It can run sophisticated automation applications, such as our LogicLinx* programmable logic control, without compromising performance.

GE Grid Solutions has installed D200 systems with point counts exceeding 80,000. Contact GE Grid Solutions for further information on engineering large systems.

1.5.1 D200 Features • RS-232/RS-485 ports support large numbers of host systems and IEDs

• VME bus architecture provides high scalability and performance for adding serial ports, LAN options, and memory

• Data is integrated and coordinated, so different applications access a single, real-time database

• Optional redundant configuration for high reliability at critical sites (see section 2.9, Redundancy)

• Hardened to perform critical control functions in the substation environment, in accordance with applicable IEEE® and IEC® standards



D200 hardware is similar in design to the D20 hardware, but it has significantly more physical capacity. Based on a 9-slot VME chassis, the D200, illustrated in Figure 7, can support up to:

• 4 D.20 ports, each supporting up to 31 I/O peripherals, without repeaters, and 120 I/O peripherals, with repeaters

• 49 RS-232 or RS-485 ports (seven per D20ME or D20ME II Main Processor)

• Two Ethernet channels

Figure 7 D200 System Architecture



An example of a D200 rack layout is shown in Figure 8.

FAILOVER SUPPLY

L/R SWITCH PANELDUCT PANEL

FAILOVER SUPPLY

D200 CCU CHASSIS

UPC

DUCT PANEL

DUAL MODEM PANEL

POWER BAR

1

10

20

30

42

40

POWER BAR

DUCT PANEL


DUCT PANEL


DUCT PANEL


DUCT PANEL


DUCT PANEL


DUCT PANEL


DUCT PANEL

BLANK PANEL

BLANK PANEL

D.20 DC INTERFACE

Figure 8 Example D200 Rack Layout



1.6 D20/D200 RTU Hardware

1.6.1 Chassis The D20 and D200 chassis feature a VME/Eurocard design for mounting plug-in D20 modules: • Main Processor • Power Supplies • Modems • Ethernet/Memory Expansion Module • Media Interface Card For convenience, maintenance ports, test points, indicators and power switches are brought out to the front of the chassis. With VME versions of the D20 and D200 chassis, external connections are provided through rear-mounted termination panels.

1.6.1.1 D20 Chassis

D20ME or D20ME IIMain Processor (up to 2)

D20EME EthernetMemory Expansion

Module Power Supply

Media InterfaceCards

Modem

5.25in

8.5 in19.0 in

Figure 9 D20 Perspective Drawing

The D20 chassis is available in a single-slot Eurocard version, or a five-slot VME version. The single-slot chassis provides one horizontal double-size Eurocard slot for mounting the D20 processor card. It is equipped with an integral D20 termination board for customer power and field connection, and for serial-port access.

The VME chassis is equipped with five horizontal expansion slots for use with VME compatible printed circuit boards. A separate termination board is required with the full VME chassis. The VME D20 chassis can support up to: • Three D20 processor cards • Two D.20 ports, each supporting up to 31 peripherals without repeaters or 120 I/O

peripherals with repeaters • Twenty-one RS232 or RS-485 ports (seven per main processor) • Two Ethernet ports



1.6.1.2 D200 Chassis

Power Switch / Fuse PanelD20EME Ethernet Memory

Expansion Module

Media Interface Card(MIC)

Modem Slots (seven if MICinstalled, eight otherwise)

D20ME or D20ME IIMain Processors

(up to seven)

Up to four Power Supplies

10.5

in

19 in.

14 in

.

Figure 10 D200 Perspective Drawing

The D200 chassis is a nine-slot VME chassis that can support up to:

• Seven D20 processor cards

• Four D.20 ports supporting up to 124 peripherals without repeaters and 480 I/O peripherals with repeaters

• 49 RS-232 or RS-485 ports (seven per main processor)

• Two Ethernet ports

1.6.2 Main Processor The design of the D20 main processor has evolved with improvements in processor performance and electronic packaging technology. Previous versions of the D20 main processor (D20M, D20M+ and D20M++), although no longer available, are still operating at many locations. The current versions of the D20 main processor (D20ME and D20ME II) are described below. For a detailed description of the main processors, see section 2.2, Main Processor.

Compatibility of the different versions of the D20/D200 main processors and chassis is listed in E. D20/D200 Main Processor Compatibility.



Figure 11 D20ME II Main Processor

1.6.2.1 D20ME The D20ME Main Processor:

• Concentrates data from substation equipment, then processes and forwards this data to the SCADA Master

• Receives control actions from the SCADA Master and forwards these actions to substation equipment

• Depending on the application software supported on the unit, initiates control actions based on the status of the substation equipment

• Processes maintenance commands received through the WESMAINT port. The D20ME interfaces with substation equipment through:

• D20 I/O Peripherals

• RS-232 ports (eight RS-232 ports per D20ME, one of which is the maintenance port)

• Ethernet ports (two per D20/D200)

1.6.2.2 D20ME II In addition to the D20ME functionality described above, the D20ME II main processor can be configured to support RS-485 communications on any of seven serial ports (the eighth is reserved for the RS-232 WESMAINT port). Through each of the RS-485 serial ports, the D20/D200 can communicate point-to-multipoint with large numbers of end devices, out to a distance of 4000 feet.



1.6.3 Ethernet/Memory Expansion (EME) Kit The D20EME is a VME-based module that combines Ethernet support and global memory expansion.


The D20EME allows VME-based D20 and D200 systems to be connected directly to any 10 Mbps Ethernet-based network. Available configurations of the D20EME module include: • Ethernet only • Memory only • Ethernet and Memory

For more information, see section 2.3, Ethernet/Memory Expansion (EME) Kit.

1.6.4 Power Supplies The D20 switch-mode power supply, installed in the D20 chassis, provides power to the units that are installed in the chassis, and up to five D20 I/O peripherals depending on the hardware configuration. For larger systems with more than five I/O peripherals, an external power supply is always required. D200 power supplies provide power to multiple processors and are configured as separate +12 and 5 V supplies.

Figure 13 D20/D200 Chassis Mounted Power Supplies



Several types of power supplies are available for D20/D200 systems:

Table 3 D20/D200 Power Supplies

Power Supply Type Features

Standard chassis-mounted

• Chassis-mounted • Switch-mode converters • Provides power for all modules in the chassis, including the main processor, VME

cards, modems.

External Required for large numbers of I/O peripherals or modems.

Redundant Provides fail-over protection and delivers continuous power to the D20 modules and peripherals.

For a listing of available power supplies, refer to section 2.5, D20/D200 Power Supplies and Chargers.

1.6.5 Modems GE Grid Solutions offers a wide range of D20/D200 modems to provide communication between the D20/D200 and SCADA host computers or remote devices, including proprietary WESDAC modems and third-party modems from vendors such as Telenetics® and Westermo. For more information, see section 2.6, D20 Modems.

1.7 I/O Peripherals A range of I/O peripherals is available to provide expandable input/output functionality for the D20/D200.

Figure 14 D20A I/O Peripheral

The following types of I/O peripherals meet various input/output requirements. • D20A – 32-channel DC analog input module • D20K – 32 control relay module • D20KI – 8 interposer relay module (up to four D20KIs per D20K) • D20S – 64-channel digital input module • D20C – Combination of 16 digital inputs and 8 digital outputs. Optional 16 analog inputs, or

8 analog inputs and 8 analog outputs.



• D20AC – Up to 15 direct AC inputs and 1 DC analog input For a detailed description, see section 2.4, I/O Peripheral.

D20 I/O peripherals are available in standard and high-voltage versions. The high-voltage versions of the peripherals are electrically more robust than the standard versions, and meet a broader range of industry standards. These standards, which include IEC standards for electrostatic discharge, RFI susceptibility, electrical stress, and vibration, are described in A. Specifications and Supported Standards.

1.8 Auxiliary Equipment GE Grid Solutions offers a selection of auxiliary equipment to support specific substation applications, including:

• Interposing relay panels for applications requiring heavy-duty control ratings

• Universal protocol converter to interface with devices that use synchronous protocols

• Data display panel to view any data point on a built in LCD screen

• Fiber optic interfaces For more information, see section 2.10, Auxiliary Equipment.

1.9 Communications The D20/D200 interfaces with peripherals and external devices over several types of communications facilities:

• RS-232

• RS-485

• D.20 Link

• Ethernet For a detailed description, see section 2.7, Communications.



1.10 Firmware The D20/D200 software is based on a core set of software modules, collectively referred to as the base system. The base system is programmed into the D20/D200 on-board flash memory as firmware. Processing and data acquisition functionality is distributed between the I/O peripheral processors, which have similar but smaller base systems, and the D20 main processor. The base system for the D200 is commonly referred to as the CCU base system. For a detailed description, see section 2.2.3 , Firmware.

D20/D200 base systems have the following features:

• System calls are available for user-generated software

• D20 peripheral firmware and processes

• Support of libraries and processes for a wide range of I/O devices

• Database manager facility (WESDAC Interface Node)

• Background system diagnostics

• Comprehensive diagnostic and maintenance facility support (WESMAINT)

1.11 Configuration and Maintenance Software The D20/D200 is equipped with a range of maintenance utilities to assist the user in configuring, testing and monitoring the system:

• SGConfig, a PC-based tool for configuring D20/D200 hardware and software remotely over a network or locally through the maintenance port.

• LogicLinx, an IEC 61131-3 compliant soft logic automation tool comprising a executor running in the D20/D200 firmware and PC-based editor for creating PLC-like programs.

• WESMAINT is a maintenance facility that resides on the D20 and D200 accessed through a simple terminal to view collected data and system status and, for some applications, make changes to the configuration.

• 68K Monitor, an on-board advanced diagnostic tool accessed thorough a terminal interface and used for troubleshooting, including memory examination, dumping and editing, setting break points, and CPU usage and process profiling.

For a detailed description, see 3. Configuration and Maintenance Software.

1.12 System Documentation A full suite of D20/D200 user documentation is provided with each system:

• Hardware Manual, consisting of:

− Hardware installation, operation and maintenance guides

• Software Manual, consisting of:



− Software configuration guides

− Maintenance utility user guides

• Site-Specific Manual, consisting of:

− Bills of Material

− Rack layouts

− Configuration tables

− Termination lists

− Cabling schematics

− Module layout drawings (complete with wiring and jumper configuration instructions).



2. Detailed Technical Description

This section describes the D20/D200 hardware and software design & operation in more detail.

2.1 Mechanical Design and Packaging

2.1.1 General The design of the D20/D200 packaging was driven by the following electric utility requirements:

• Environmental standards required by the power utility and resource industries

• Compliance with worldwide industry standards

• Maintainability – Minimize the requirement for, and simplify, routine maintenance

• Reliability – Maximize the Mean Time Between Failure and minimize Mean Time To Restore

• Packaging efficiency

• Safety To achieve these requirements, D20/D200 packaging is based on:

• Compact modules designed for industry-standard 19" (483 mm) rack mounting.

• VME/Eurocard architecture

• Front access provided on peripheral I/O modules for easy access to field terminations, displays and auxiliary hardware

• Electronics and logic circuits are easily removed from fixed I/O termination panels, without powering down the equipment or disconnecting field termination

• High-quality metal panels for all chassis, mountings, panels and terminations

• Corrosion-resistant finishes and anodized parts, for resistance to rust, oxidization and scratching

• Gold-plated connectors and sockets where necessary, tin or nickel-palladium plated connectors and sockets otherwise

• Connectors, integrated circuit sockets and terminations providing secure positive connections

• Separate termination boards for customer connections and serial I/O access

• Standard screw compression-type terminal blocks, capable of terminating a single #12 AWG [2.05mm] wire supplied for field I/O terminations. Optional DB25 connectors, removable terminals or customer-specified terminal blocks provide flexible termination schemes.

• Industry-standard FR-4 epoxy glass printed circuit boards, coated with solder mask



• Intermodule wiring mechanically protected and separated from field cabling

2.1.2 Enclosure To meet specific customer requirements, GE offers a wide range of equipment enclosures, including NEMA® 1, 4, 4X and 12 standard wall-mount, freestanding or swing frame cabinets.

The standard cabinet color is beige. Custom colors (e.g. ASAG/gray) are available by request. As well, a complete line of accessories, such as lighting, AC outlets, and door locks, are available as options.

2.1.3 Chassis D20/D200 chassis assemblies are 19” rack-mountable and based on Eurocard/VME (VersaModular Eurocard) standards. The chassis provides mounting and interconnection for the following D20 modules:

• Main processors

• Power supplies

• Modems

• Ethernet/Memory expansion

• Media interface cards Power switches, test points and indicators are mounted on the front of the D20 modules. Rear-mounted back planes are used to interconnect the VME bus positions and to provide cable and wire-harness interfaces.

Depending on your application, the following types of chassis are available:

• D20 Chassis (non-VME)

• D20 Chassis (VME)

• D200 Chassis (VME)

2.1.3.1 D20 Chassis (non-VME) The D20 chassis is a 3U horizontal slot chassis. Non-VME versions of the D20 provide a single horizontal Eurocard slot, into which the D20ME board is installed:



Figure 15 D20 Chassis (non-VME version)

The non-VME version of the D20 chassis is equipped with a rear-mounted termination board that provides power connection and serial port access to the D20 system.

2.1.3.2 D20 Chassis (VME) The VME version of the D20 chassis is equipped with five horizontal expansion slots for VME-compatible modules:

Figure 16 D20 Chassis (VME version)

The VME version of the D20 chassis is equipped with a rear-mounted termination board for power connections and serial ports for one processor board. An optional rack-mounted serial port panel is available to support the seven serial ports on a second processor board.



2.1.3.3 D200 Chassis

The D200 is a vertical-slot VME chassis, as shown in Figure 17.

Figure 17 D200 Chassis

The D200 chassis is equipped with a rear-mounted termination board for power connections and serial-port access.

2.1.4 Peripheral I/O Module Assembly D20 peripheral I/O modules consist of two separate assemblies - a logic panel and a field termination panel. See Figure 18. The logic panel contains all of the logic circuitry and active components in the peripheral I/O module. The termination panel provides terminations for all field I/O, power, and maintenance connections, as well as connection to the upstream and downstream D.20 links. The termination panel is designed for flat mounting or 19” rack mounting.



Acrylic DisplayCover

Terminal Blocks

WESTERM Termination Panel

WESDAC Logic Panel

Metal MountingPlate

Figure 18 D20 Peripheral I/O Module

The logic panel is housed in a metal enclosure, which plugs directly into the termination panel. The logic panel enclosure is faced with a semi-transparent acrylic cover, which allows the user to monitor LED displays for various peripheral functions and field I/O points.

If a unit fails, the operator unplugs the failed logic panel and replaces it with a working unit while the power remains on. Once the new unit is installed, the D20/D200 automatically downloads the appropriate operating software and database parameters to the module to make it operational.

2.1.5 Environmental Typical operating temperature range of -10°C to +55°C and a relative humidity range of 0 to 95%, non-condensing.

Note: At higher extremes of the temperature and humidity operating ranges (i.e., when temperature and humidity are both high), occasional errors may be observed on RS-485/D.20 links; however, packets with errors are detected and retransmitted by the data communications protocol. The net result is error-free communications.

Storage conditions, with equipment de-energised: temperature range of -40°C to +80°C (0°C to +70°C for Graphics Display) and relative humidity less than 95%, non-condensing.



2.2 Main Processor D20ME and D20ME II, which are the main processors for the D20/D200, act as master controllers over D20 peripheral I/O modules, which serve as slaves. The main processors function as data concentrators and central processors of field data. The D20 I/O peripheral modules perform the primary processing of data, which increases the speed and efficiency of the D20, by reducing the workload on the main processor.

Note: In the following sections, references to the D20ME apply also to the D20ME II, unless explicitly stated.

2.2.1 Hardware The D20ME is an advanced, single board, VME-bus-compatible central processing unit. It uses a real-time multi-tasking operating system that supports all standard SCADA/EMS related functions and advanced custom applications. It features high-speed CMOS logic devices that ensure low power consumption, noise immunity and reliability.

CPU/CONTROLSERIAL

I/O

INTERRUPTCONTROL

MEMORY VME BUSINTERFACE

Data Address andControl Buses

2 D.20 HDLC Ports

7 RS-232 Ports

Wesmaint Port

VME Interrupts

Local Interrupts

VME Bus

Figure 19 D20ME Block Diagram



The D20ME consists of five distinct interacting circuit blocks, as shown in Figure 19.

• CPU/Control performs data processing, device addressing and system control. The D20ME uses an MC68030 32-bit microprocessor, which is capable of addressing up to four megabytes of on-board memory or four gigabytes when used in conjunction with external memory accessible via the VME bus interface. Also included in this block are address decoding, clock and control signal generation, asynchronous control, power monitor/watchdog timer/reset, status output port and diagnostic/debug facilities.

• Memory consists of memory components and circuits. The D20ME uses boot EPROM and three banks of four sets of memory devices (static RAM, non-volatile RAM, and flash) providing up to 1.5 MB, 0.5 MB, and 2 MB respectively of on-board memory.

• Interrupt Control consists of an interrupt handler designed specifically for the VME bus. It operates in conjunction with a VME bus controller, and determines the importance of, and controls, interrupts from the serial ports, the D.20 Link HDLC chip, and the real-time clock.

• Serial I/O is the communications center of the D20ME. It consists of two D.20 HDLC communications ports, one RS-232 9600 baud maintenance port and seven byte-oriented asynchronous RS-232 communication ports. The seven serial ports, all of which are programmable, are used for communication with SCADA/EMS master stations and/or other serial devices, such as printers and IEDs. The HDLC port handles a bit-oriented D.20 protocol structure for communicating with the D20 I/O peripheral.

• VME Bus Interface. The D20ME operates as the VME bus master to allow it to interface to, control and arbitrate the VME bus.

2.2.2 D20/D200 Main Processor Specifications Table 4 D20/D200 Main Processor Specifications

Item Description

CPU/Memory • 32-bit Freescale 68030 microprocessor

• 40 MHz MPU clock • Real-time clock, 1.0 ms resolution accurate to ±2.0 ppm

• On-board memory

− 2 MB Flash memory − 2 MB SRAM (incl. 512 K battery back up)

− 512 KB BootROM Self Diagnostics • Program memory checksums

• RAM test

• Configuration verification

• Interrupt controller verification • Serial port test

• Watchdog and power monitor

• Peripheral communication checks • Error logger



Item Description

Communications • Two HDLC ports for link to peripheral modules • The D20ME has seven programmable RS-232 serial ports for communications to SCADA

master, satellite RTUs and IEDs. The D20ME II has seven programmable serial ports, any combination of RS-232 and RS-485.

• 38,400 kbps on all 7 ports, all running half duplex & 100% utilization (D20ME and D20ME II)

• 9600 baud, RS-232 maintenance port (D20ME and D20ME II)

• Support leased/dial-up telephone lines, modems, 900 MHz radio, trunked radio, spread spectrum radio, microwave, and fiber optic communications.

Power Requirements • Power consumption: 3.5 W typical, 5 W max. Physical • LED indications: Run/Halt and System Fail

2.2.3 Firmware The D20ME contains two types of firmware: BootROM and flash applications. BootROM contains the software needed to start up a D20 and diagnostic applications. Application software consists of a base system that includes the operating system, hardware-dependent software, and applications that are modular and hardware-independent so they can run on multiple platforms (D20, D25 and iBOX, for example).

2.2.3.1 BootROM BootROM firmware is stored on an EPROM chip. The following types of programs are stored as BootROM firmware:

• Operating system

• Boot-up (reset) code

• Device drivers

• IRQ controller initialization

• Interrupt service procedures

• Monitor functions

• Root process

• Watchdog task

Operating System The D20ME operating system is pSOS®. pSOS is a real-time, multi-tasking operating system kernel, with the following features:

• Integrated, multi-tasking with a structured efficient supervisory layer

• Priority scheduling of processes in coordination with other tasks. User applications are partitioned into sets of processes



• Inter-task communication and synchronization controlled from an efficient dedicated functional group

• Dynamic memory allocation and reclamation, using an enhanced, highly efficient, first-fit algorithm

• Real-time clock control managed via a service call from an external time base. The real-time clock:

− Maintains calendar time

− Performs time slicing, which allows processes to pause

− Supplies a time-out option to other service calls

• Direct memory access support is not required

• Efficient real-time responsiveness

Boot-Up Code The D20 system initializes from the BootROM. It checks and verifies the contents of the BootROM, then initializes the system hardware and various I/O devices. If it finds any errors or defects in the memory, the system either shuts down to a minimum running state or, in the event of serious defects, shuts down completely.

After the initial diagnostic routines are run, the boot-up code downloads the operating system code into RAM so that it can be accessed more quickly. From this point on, all resident firmware and supplied custom applications run from either 32-bit wide RAM or 32-bit wide flash. The system and application databases are stored in NVRAM.

Device Drivers The D20 uses two communication device drivers:

• Octart serial I/O chip, which manages input and output through eight serial ports.

• HDLC controller chip (dual-port), which forms part of the high-speed D.20 Link between the D20ME and the D20 I/O peripherals.

68K Monitor Functions Monitor functions include debugging tools that users can access via a PC, VT100 terminal with a keyboard, or remotely via telnet. Monitor functions include memory examination, dumping and editing, setting break points, single-step modes, communication port loop-back tests, mark and space modem adjustments, and CPU usage and process profiling.

Watchdog Task Watchdog is a simple, low-priority task that is designed to send a reset signal to the watchdog timer circuit. As long as this circuit is reset every second, the system will not be rebooted. The D20 performs standard self-checks on initial start-up, periodically during operation, and as manually requested through WESMAINT.



2.2.3.2 Base Applications The D20 base system includes the following applications:

• WESDAC Interface Node (WIN)

• WESMAINT

• System library resources Base applications, which are stored in flash memory, can be classified as one of the following:

• Data Collection Applications (DCAs), which poll devices to collect data.

• Data Processing Applications (DPAs), which request and process data required by a host/master computer.

• Data Translation Applications (DTAs), which manipulate data inside the RTU to generate new information, translate data to different formats, or take action when certain events occur.

WESDAC Interface Node The WESDAC Interface Node (WIN) is the central database for the D20/D200. WIN manages the transfer, storage and manipulation of data between DCAs, DPAs, and DTAs. WIN sends requests for data to, and receives new data from, DCAs, then stores the new data in the system database. WIN also receives requests for data from, and sends data to, DPAs, and routes data output operation requests from DPAs to DCAs.

WESMAINT WESMAINT is a maintenance facility that resides on the D20 and D200. For a more detailed description, see section 3.3, WESMAINT

System Library Resources The system library resources are collections of commonly used functions that assist programmers in the development of new code. There are several libraries available for the D20.

D.20 Link Subsystem The D.20 Link subsystem is a DCA that polls data from the D20 I/O peripheral modules, and then routes that data to WIN. It also asks the peripherals to perform any output operation requests that it receives from WIN. These communication transactions properly package the data and send or receive it over the D.20 Link.

The D.20 Link subsystem, which is known as the peripheral scan process, works with the D.20 Link driver to communicate with peripheral modules. The D.20 process formats the data according to the requirements of the D.20 protocol then calls the HDLC driver, which provides the actual hardware interface between the D20ME and the I/O peripherals.

2.2.4 Time Synchronization The D20ME/ME II can be used as an accurate timeserver for synchronizing the clocks of substation equipment connected to the D20 Ethernet or serial ports.



One of the D20ME/ME II serial ports is connected to the demodulated IRIG B port (IRIG, InterRange Instrumentation Group) of a GPS receiver (or other device), as illustrated in Figure 20. The D20ME/ME II obtains accurate time information from the GPS receiver then regularly distributes this information to the connected substation devices that require it. For example, the D20ME/ME II can distribute time information to DNP3 serial outstations capable of DNP3 time synchronization.

GPS Reciever

GPS Satellites

D20ME Processor

IRIG-B

Distribution of time information tosubstation devices and peripherals

Figure 20 D20/D200 Time Synchronization

To support time synchronization, the D20/D200 must be able to support the device’s protocol, and the device’s protocol must support time synchronization.

A sample of the demodulated IRIG B protocol is shown in Figure 21.

10

1 2 4 8 10 20 40 1 2 4 8 10 20 40

P2P1P0

0 20 30 40 50

P3 P4 P5

1 12 24 48 810 1020 20 40 80 100200

60

P7P6

50 70 80 90 100

P8 P9 P10

20 21 22 23 24 25 26 27 29 21028 211 212 213 214 215 216

Binary '1'2 msec

(Typical)Binary '0'5 msec

(Typical)Reference

8 msec

Marker

.01 sec(Typical)

Seconds Minutes Hours Day

Time of DayControl Functions

Figure 21 Demodulated IRIG B Signal



The IRIG B format supports the time of day (hours, minutes, seconds) and the day of the year. The day of the year is the elapsed day starting from January 1st, and is reported as a number from 1 to 365 (366 for leap years). Year information is not provided by the IRIG B signal. Accuracy to milliseconds is obtained by tagging the leading edge of the pulse train to the time defined by the pulse train.

2.3 Ethernet/Memory Expansion (EME) Kit The D20EME is a VME-based module that combines Ethernet support and global memory expansion. If you install multiple D20ME or D20ME II main processors in the D20 or D200 VME chassis, you will need to install a D20EME Ethernet/Memory Expansion module to provide shared memory.


The D20EME allows VME-based D20 and D200 systems to be connected directly to any 10 Mbps Ethernet-based network. Available configurations of the D20EME module include:

• Ethernet only

• Memory only

• Ethernet and Memory Memory configurations come equipped with 8 MB of battery-backed static RAM. This additional memory increases the amount of historical data, and the size of the database, that can be maintained by the D20/D200. Memory capacity can be upgraded to 16 MB, through the installation of an additional memory module.

Ethernet configurations are equipped with two independent 10 Mbps Ethernet channels. A Media Interface Card provides the physical Ethernet interface. Several versions of the MIC are available, depending on the Ethernet format.

Table 5 D20/D200 Ethernet Media Types

10BASE-T Provides two RJ-45 connectors for connecting to CAT5, or greater, UTP cabling

10BASE2 Provides two BNC connectors for connecting to thin coax cabling

10BASE-FL Provides two ST-style connectors for directly connecting to a single or multi-mode glass or plastic fiber optic cable



2.4 I/O Peripheral Modules The D20/D200 design is based on a distributed-processing architecture. As a result, the real-time data acquisition and control software that interfaces with field points is installed on peripheral modules, rather than on the main processor unit.

These I/O peripherals are intelligent modules that contain on-board microprocessors. They are configured as slaves to the D20/D200 main processor. In this way, specific I/O processing is distributed throughout the RTU to the appropriate I/O module.

D20 I/O peripherals communicate with the D20/D200 through a high speed, high-level data link controller (D.20 Link) in the form of poll and response messages. The peripheral modules have a serial communications port and a variable number of field connections.

The hardware construction of each module is similar (see Figure 18.) Each peripheral module has common code stored in EPROM and a unique application configuration stored in RAM. The base application code is stored on the D20/D200. At power up, the configuration and application code are downloaded to the peripheral module from the D20/D200 main processor.

2.4.1 Types of I/O Peripherals There are five basic types of I/O peripheral modules:

• D20S digital input

• D20A analog input

• D20K control output

• D20C combination input/output

• D20AC direct AC analog input I/O peripheral modules are available with a variety of I/O point count support and termination options. The following is a listing of the various D20 I/O peripherals that are currently available from GE Grid Solutions:

Table 6 D20/D200 I/O Peripherals

Peripheral I/O Support Termination

D20A 32 analog inputs, standard version Compression

D20AD 32 analog inputs, standard version DB25

D20AX 32 analog inputs, standard version Disconnect

D20AB 32 analog inputs, standard version Barrier

D20AZ 32 analog inputs, high-voltage version Compression

D20S 64 digital inputs, standard version Compression

D20SD 64 digital inputs, standard version DB25

D20SX 64 digital inputs, standard version Disconnect

D20SB 64 digital inputs, standard version Barrier

D20SZ 64 digital inputs, high-voltage version Compression



Peripheral I/O Support Termination

D20K 32 Control Outputs, arranged as 32 Trip/Close, 32 individual control, 16 Raise/Lower pairs, or combinations thereof, standard version.

Compression

D20KR 32 Control Outputs, arranged as 32 Trip/Close, 32 individual control, 16 Raise/Lower pairs, or combinations thereof, standard version.

DB25

D20KX 32 Control Outputs, arranged as 32 Trip/Close, 32 individual control, 16 Raise/Lower pairs, or combinations thereof, standard version.

Disconnect

D20K4Z 32 Control Outputs, arranged as 32 Trip/Close, 32 individual control, 16 Raise/Lower pairs, or combinations thereof, high-voltage version.

Compression

D20C 16 digital inputs, 8 digital outputs, optional 16 analog inputs or 8 analog inputs and 8 analog outputs, standard version.

Compression

D20CD 16 digital inputs, 8 digital outputs, optional 16 analog inputs or 8 analog inputs and 8 analog outputs, standard version.

DB25

D20CX 16 digital inputs, 8 digital outputs, optional 16 analog inputs or 8 analog inputs and 8 analog outputs, standard version.

Disconnect

D20CB 16 digital inputs, 8 digital outputs, optional 16 analog inputs or 8 analog inputs and 8 analog outputs, standard version.

Barrier

D20C4Z 16 digital inputs, 8 digital outputs, optional 16 analog inputs or 8 analog inputs and 8 analog outputs, high-voltage version.

Compression

2.4.2 Termination Types Standard D20 I/O peripherals can be ordered with the following field termination options:

• Compression: Field wiring is terminated directly onto board-mounted screw terminal compression blocks (#12 AWG [2.05mm] max, blade screwdriver - 0.6 x 3.5 x 100 mm) on the D20 I/O Peripheral, as illustrated below:

Figure 23 D20 I/O Peripheral - Compression Termination

• DB25: Field wiring is terminated onto the D20 I/O peripheral through DB25 connectors, as illustrated below:

Figure 24 D20 I/O Peripheral – DB25 Termination



• Disconnect: Field wiring is terminated onto plug-on terminator blocks (#12 AWG [2.05mm] max, blade screwdriver - 0.6 x 3.5 x 100 mm), which then mate with board-mounted headers on the D20 I/O Peripheral. This is illustrated in Figure 25, with the board-mounted header shown on the right, and the cable plug shown on the left.

Figure 25 D20 I/O Peripheral – Disconnect Termination

• Barrier: Field wiring is terminated onto barrier terminals (#10 AWG [2.59mm] max, #6-32 screws) on the D20 I/O peripheral, as illustrated below:

Figure 26 D20 I/O Peripheral – Barrier Termination



2.4.3 Hardware D20 I/O peripherals consist of four distinct circuit blocks, as shown in Figure 27.

MCU CONTROL

I/O

POWERSUPPLY

SERIAL I/O

Data Address andControl Buses

MaintenancePort

Channel 1

Channel 2(backup)

D.20 HDLC Ports

+12 V-12 V+5 V

D20 A32 Analog Inputs

D20 S64 Digital Inputs

D20C16 Digital Inputs8 Control Outputs

Optional: 16 Analog Inputs or 8 Analog Inputs and 8 Analog Outputs

20 - 60 VDC

D20 K32 Control Outputs

Figure 27 D20 Peripheral I/O Block Diagram

The fourth block, Input/Output, is specific to the function of the module. The circuit blocks are:

• MCU/Control: Performs data processing and storage, device addressing and system control. Consists of an 8-bit microcontroller (MCU), address decoding, control signal generation, clock generation, power monitor/reset, module ID and memory.

• Serial I/O: Consists of the D.20 communication and maintenance ports.

• Power Supply: Accepts an input voltage of 20 to 60 V DC, provided from either the host D20 power supply or an external power source, and supplies a regulated output of +5 V and +/-12 VDC.

• Input/Output: Controls and reads all digital or analog inputs, and controls and monitors all digital outputs, as directed by the MCU.



2.4.3.1 Status Indicators All D20 I/O Modules are equipped with the following LEDs:

LED Description

ON (GREEN) On solid when power is applied.

RUN (GREEN) With the FAULT LED, provides information about the unit’s operating status.

TX1 (GREEN) Flashes when D.20 1 data is transmitted by the I/O module.

RX1 (GREEN) Flashes when D.20 1 data data is received by the I/O module.

TX2 (GREEN) Flashes when D.20 2 data is transmitted by the I/O module.

RX2 (GREEN) Flashes when D.20 2 data data is received by the I/O module.

FAULT (RED) With the RUN LED, provides information about the unit’s operating status.

In addition to the above, each D20 I/O Module is equipped with module-specific status indicators.

2.4.4 Firmware There are two main types of peripheral I/O software: common code and base-application code. Similar to the D20 main processor software, peripheral software is installed as firmware on the modules. Common code is resident in the peripheral modules, and device-specific base applications are stored in the D20 main processor then downloaded to the peripheral modules at boot-up.

2.4.4.1 Common Code Common-code firmware in the peripheral modules is much like the BootROM firmware in the D20 main processor. The common code manages functions common to all peripheral units, specifically the input and output through communications and diagnostic ports. It also performs diagnostic checks of peripheral hardware.

Common code, which is stored in a 32K EPROM (labeled “pcommon”), remains active after a restart, whether or not the base-application code has been downloaded to the peripheral unit. This allows the peripheral unit to communicate and respond to D20/D200 requests, even without its device-specific base-application code loaded. However, peripheral module responses have an abbreviated format unless the application code is loaded.

The common code includes the following processes: • Real-time executive • Watchdog and reset code • Diagnostics • Device drivers • Communications • Common code interface • Maintenance facility and monitor • Library resources.



Real-Time Executive The operating system of the peripheral units is a real-time executive, which controls process scheduling, and resource and interrupt management. The real-time executive controls three basic processes: watchdog, diagnostics and maintenance facility. It also controls some application processes downloaded from the D20/D200.

The real-time executive supports pausing, time-outs and suspension of the maintenance process while maintenance port operations are in progress. A limited number of monitor (debugging) functions are available as development tools for creating new code for peripherals.

Watchdog and Reset Code The 68HC11 microcomputer chip on the peripherals includes a built-in watchdog to help protect against software failures. The reset code also performs the initialization in the peripherals.

Diagnostics The diagnostic processes, governed by the real-time executive, include a sub-routine that performs checks specific to the peripheral type.

Device Drivers Peripheral modules have two device drivers: • Serial Port, a serial communications interface which allows the connection of a VT100

terminal or PC for running maintenance facilities. • HDLC drives the HDLC protocol controller for the D.20 Link between the D20 main

processor and I/O peripherals.

Peripheral Communications The resident peripheral communication process functions continuously, requesting and receiving data from the I/O peripherals, then forwarding these over the HDLC link to the D20 main processor. Module-specific applications and configurations are downloaded to the D20 I/O peripherals as required. Communication failures between the D20 main processor and D20 I/O peripherals are logged and reported to the master if required.

Common Code Interface The Common Code Interface provides quick and easy access to various programs making up the peripheral common code. This interface reduces the size of the application code that is downloaded from the D20/D200 by using a jump-table at a fixed address in the peripheral module. The jump-table accesses the peripheral module library resources, executive entry points, display functions and keyboard input/output for the maintenance port.

Promaint Similar to WESMAINT on the D20 main processor, Promaint is the maintenance facility for the peripheral modules. Promaint combines maintenance and monitor functions. The maintenance portion is used to view data, or to verify that the module is functioning correctly by, for example, forcing a control point and then checking to see whether the control operation took effect.

The monitor facility is designed to interpret commands from the maintenance port, such as storing data to memory. It can also execute various application-dependent commands once an application program has been downloaded from the D20/D200.



Library Resources The peripheral module library resources contain several general-purpose conversion routines.

2.4.4.2 Base-Application Code There is base-application code for each type of peripheral module. Each base application contains code for the following functions: • Communication interface routines • Diagnostics • Application-specific maintenance • Specific field input/output. These functions are initiated by a separate clock source or hardware-driven IRQ rather than by the real-time executive.

The base-application code is stored in the EPROM (labeled “pcommon”) on the D20 main processor and downloaded to the peripheral modules, where it is stored in RAM, along with a checksum for verification purposes. A base-application database (unique to each peripheral type) is downloaded to the peripherals at the same time. Peripheral base applications communicate with the D20 main processor through the common code communications process, then over the D.20 Link.

2.4.5 I/O Processing D20 I/O peripherals provide specialized processing and storing/buffering functions for digital inputs, analog inputs, control outputs, analog outputs, pulse accumulator inputs and combinations of these, by gathering data from field sources or acting as an output unit to interface with field devices.

I/O processing provides flexible, reliable, robust operation and is configurable on a per-point or per-system basis. See Table 7. A detailed description of I/O processing is discussed in the following sections in more detail for each module type.

Table 7 I/O Processing

Type Description

Digital Output • Configurable control type, security and rules

• Support simultaneous control of digital outputs

• Request queuing

• Request repetition

Digital Input • Software debouncing

• Chatter filtering

• Report limiting

Analog Input • Line noise filtering

• Deadbanding



2.4.6 D20S Digital Input Peripheral

Figure 28 D20S Digital Input Peripheral

The D20S Digital Input Peripheral, illustrated above, obtains and processes digital input states from field devices. Changes of state in the digital inputs are reported to the D20 main processor for further processing, over the high-speed D.20 Link.

Note: D20C peripherals are also able to process digital inputs. Digital input processing on the D20C is the same as that on the D20 S. More information on the D20C is provided in section 2.4.10 , D20C Combination I/O Peripheral.

The D20S logic module plugs directly into a D20S termination panel equipped with screw compression type terminals for field terminations. The D20S termination panel is jumper configurable, so that contact wetting can be supplied from either the D20S power source or from an external source. Wetting voltage is fused and monitored.

The D20S can accept up to 64 digital inputs, each of which can be configured from a downloaded database to be processed as one of the following:

• Status and alarm inputs

• Status inputs with change of state detection (COS)

• Sequence of events (SOE) using time-tagged COS

• Binary-Coded Decimal or parallel inputs

• Pulse accumulator or counter inputs

• Pulse duration inputs.

The 64 digital inputs are organized in eight groups of eight electrically isolated inputs, each group with a common return. Each input is photo coupled and can accept inputs of 24, 48 or 130 V DC of any polarity. The microprocessor scans each input at one millisecond intervals and provides selectable debounce of 4 to 255 ms. Changes are time-tagged to a resolution of one



millisecond and placed in a first in - first out (FIFO) buffer for transmission to the D20 main processor. Refer to Figure 29.

Time-tagged changes are reported in chronological order. Non-time-tagged changes are placed in a separate FIFO buffer and reported upon request. An anti-chatter filter function prevents one or more chattering points from filling the FIFO buffer. Each COS and SOE FIFO buffer is 256 events long.

Input VoltageOption

SWC andImpulse

Protection

Buffer, OptoSteeringInterface

PPI

ParallelPeripheralInterface

D20S Termination BoardD20S Logic Section Input

1 - 8

9 - 16

17 - 24

25 - 32

33 - 40

41 - 48

49 - 56

57 - 64

Figure 29 D20S Digital Input Peripheral Block Diagram



2.4.6.1 D20S Digital Input Processing The following digital input processing is carried out by the D20S:

• Software Debouncing: Used to verify that a digital input point has actually changed state. Two levels of software debouncing are provided:

− First-level debouncing, which can be provided on a per-point basis, is used to filter glitches and contact bounce. The first-level debounce period can be configured, on a per-point basis, to any value between 0 and 255 ms, in 1 ms increments.

− Second-level debouncing is used to qualify data that has been first-level debounced. The input state must remain stable through the second-level debounce period, configurable on an individual point basis, before a valid change will be reported.

• Chatter Filtering: A digital input is disabled if the number of state changes encountered during a defined time interval is excessively high. While the chatter filter is ON, all state transitions are ignored. While it is OFF, state transitions are gated through. Reports are issued whenever the chatter filter state changes from ON to OFF, or from OFF to ON. The filter period is programmable, on a per-system basis, from 6 to 65535 ms, in increments of 1 ms. The lock-out period, which defines the minimum number of filter periods during which the chatter filter is ON, is programmable on a per-point basis, from 0 to 65535, in increments of 1 ms. The maximum expected number of state transitions is programmable, on a per-point basis, from 0 to 255, in increments of 1 ms.

• Report Limiting: You can specify the minimum number of state transitions that must occur before a report is sent. The minimum number of state transitions can be programmed, on a per-point basis, to any value between 0 and 255 ms, in increments of 1 ms. If it is set to 0, a report will be issued every time a state transition occurs.

2.4.6.2 D20S Base Application The base application on the D20S controls four main functions:

• Field Input Scanning collects data about the status of various field points, records debounce changes, controls filtering, time-tags various changes, and queues them in a change-of-state queue for processing. The input scan period is 1 millisecond, and the state of all 64 points is recorded during each scan.

• Field Input Processing processes the changes of state (recorded during the scan process) that are queued. The results of processing are either buffered COS, SOE or transition counts for accumulator inputs.

• Communication Interface, with the D20 main processor, consists of a set of interface-function address tables that are downloaded with the base-application code. The addressed functions are application controls and data transfer functions.

• Maintenance Interface consists of a set of interface-function address tables containing addresses for maintenance and diagnostic process functions.



2.4.6.3 D20S Specifications

Table 8 D20S Specifications

Item Description

Processor 8-bit Freescale 68HC11 MPU

Clock 2 MHz MPU clock

Memory • 32 KB EPROM • 24 KB static RAM • 512 bytes EEPROM

Inputs 64 bipolar inputs in 8 groups of 8

Point Types • Status/alarm with COS detection • SOE • Form A or Form C pulse accumulator (16-bit binary counter) • Binary coded decimal • Pulse duration

Current Burden ±3 to ±6 mA per input

Scan Rate 1.0 ms

Debounce Selectable 0 to 255 ms

SOE Time Resolution 1.0 ms

Contact Wetting ±12, ±24, ±48, ±125 V

Overload Rating 500 VDC (common mode to ground)

Component Isolation Rating 1500 Vrms

Dielectric Rating 1000 VDC

D.20 Link Ports 2

Maintenance Port 9600 baud, RS-232

Power Requirements 20-60 VDC, 3 W typical

Size 19" x 5.25" x 2.5"

LED Indicators • Common LEDs, described in Section 2.2.1 , Hardware.

• For each input point, a RED LED to indicate the ON/OFF state of the point.

2.4.6.4 D20S Options The following D20S termination board options are currently available:

Table 9 D20S Options

GE Part Number Description

507-0101 WESDAC D20S (20-60 VDC) standard.

507-0103 WESDAC D20SHV2 (40-150 VDC) high-voltage.

517-0165 D20S 64 channel digital input termination board with compression blocks.

517-0179 D20SD 64 channel digital input termination board with DB25 connectors.




517-0219 D20SX 64 channel digital input termination board with separable compression blocks.

517-0327 D20SB 64 channel input termination board with barrier strips.

517-0330 D20SDI 24V, 64 channel digital input termination board with DB25 connectors



517-0241 D20SZ 48V, 64 channel digital input, high voltage termination board with compression blocks.



2.4.7 D20A Analog Input Peripheral

Figure 30 D20A Analog Input Peripheral

The D20A Analog Input Peripheral, illustrated above, is a 32-point analog input interface module. The D20A, which is capable of processing standard voltage and current inputs continuously, has the following features:

• Programmable Input Ranges: A programmable gain instrument amplifier permits programming of voltage input ranges. Ranges are stored in RAM on a per-point basis. (+/- 1, +/-5, +/- 10 V scale).

• Variable Scan Rate: Programmable scan rate from 17.2 to 20.5 ms (50/60 Hz) on a per module basis.

• 32 Differential Analog Inputs and eight internal references using synchronous integrating-type analog-to-digital (A/D) converters

• A/D Conversion provides excellent normal-mode rejection characteristics while maintaining very good response times (approximately 550 ms total).

The D20A logic module plugs directly into a D20A termination panel, which provides three screw compression type terminals for each input (+, -, shield) and sockets for analog scaling networks. Provision is made for configuring analog loop supplies from the D20A power source, or externally. Loop voltage is fused.



The analog input section consists of a filter and solid-state multiplexer, a variable-gain amplifier, an integrating voltage-to-frequency converter, a programmable timer, a CPU time register and miscellaneous support circuitry. Figure 31 is a block diagram of the analog input peripheral.

PrecisionScaling

Resistors

SWC andImpulse

Protection

Filter andAnalog Mux

D20A Termination Board

D20A Logic Section

Input

1 - 8

9 - 16

17 - 24

25 - 32

VoltageReferences

0, +/-1, +/-5, +/-10

TemperatureTransducerReference

PGAPTM

MCU

Voltage toFrequencyConverter

PPI

OptoGain

Select

OptoInput

Select

OPTOPPROPTOSYNC

Switch ModePower Supply

+12V

PGARanges

0.515

Analog Input Ranges50 mA20 mA10 mA5 mA1 mA

10 V5 V1 V

LegendMCU.......... Microcontroller UnitOPTO........Optical IsolatorPTM...........Programmable Timer ModulePPI............ Parallel Peripheral InterfacePPR...........Pulse Position Resolver

Clock50/60 Hz

Figure 31 D20A Analog Input Peripheral Block Diagram

2.4.7.1 Analog Conversion Process Figure 32 provides an overview of the analog conversion process.

INPUTADAPTER

AMPLIFIERDIVIDER

VOLTAGE TOFREQUENCY AUTO-ZERO

Figure 32 Analog Conversion Process



Analog Inputs The D20A analog input module is capable of handling 32 differential analog inputs. The conversion process is performed using a +/- 5 V full scale voltage only, with a software controlled programmable gain amplifier providing full-scale input voltage ranges of +/- 1.0 V, +/- 5.0 V and +/- 10 V on any input. Any required current input is accommodated using precision shunt-resistor analog-scaling networks on each input. Adaptors at the input of each analog point convert current and unusual voltage inputs to the required 1, 5 or 10 V full-scale input. Refer to the Index for a list of available analog input adapters.

Conversion After the input has been appropriately scaled, it is fed into a voltage-to-frequency converter. To reject line noise (NMR), the output frequency is counted over a 50 or 60 Hz period (user configurable). This value is compared to the microprocessor count over the same period to obtain a raw analog count. It is this raw analog value that is converted to a 14-bit (plus sign) number (the digitized raw analog value) representing the input voltage. The microprocessor can convert all of the 32 inputs within a scan period of 550 ms (60 Hz) to 656 ms (50 Hz.)

Voltage References The D20A uses a high-precision voltage reference chip to provide seven on-board references for auto-calibration. After a specified number of scans (user configurable), the microprocessor converts each of the references. The new calculated reference values are then stored over the previously converted values in the reference data table. If the new values are within a certain range (user configurable) of the old values, they are kept. If they are out of this range, an error is reported.

Auto Zero Eight internal references, which include a temperature reference, provide auto zero and auto calibration functions. This results in an accuracy and temperature stability of the module equal to the internal precision voltage reference.

The calculation used to obtain the digitized raw analog value (during the conversion process) would normally be based on a linear curve like Line A shown in Figure 33. Due to temperature, gain and offset inaccuracies, the curve may be slightly non-linear (Line B, exaggerated for demonstration purposes). The D20 minimizes this error by a technique called three-point linearity correction. By separately calculating the linearity difference (slope m) of the 0 to +5 V and 0 to -5 V ranges, the software can use a different equation for either positive or negative values.



Y

X5 25 45

+16383

0000

-16383

Frequency (kHz)

DigitizedRaw

Analog

Line A: Y = m1X + b1

Line C: Y = m2X + b2

Line B

Figure 33 Three-point Linearity Correction

2.4.7.2 D20A Analog Input Processing The following analog input processing is carried out by the D20A:

• Line Noise Filtering: Filters 50 or 60 Hz line noise, configurable on a per-system basis.

• Deadbanding: Technique used to virtually reduce the resolution of analog input points. Deadbanding maps the set of all possible measured values to a smaller set of reported values. The number of bits removed from the analog input values is configurable, on a per-point basis, from 0 to 13.

2.4.7.3 D20A Base Application The base application of the D20A controls four main functions:

• Analog Multiplexing and Inputting: Field inputs and reference points are multiplexed. Inputs are scaled by a programmable gain amplifier then fed into a voltage-to-frequency converter that is part of the analog-to-digital conversion circuitry. From the output of this converter, a digitized analog input is derived.

• Analog Processing of the raw analog input data, using two different methods, depending on whether the data comes from a field point or a reference point. There are full-scale voltage range reference points for every group of 32 analog inputs.

If the data comes from a reference point, it is compared to a reference value stored in EEPROM of the microprocessor. If it is too far out of range, it is stored in a reference table and marked as an error. If the data is within range, it is stored as the new reference table.

If the data comes from a field point, it is compared against its corresponding full-scale reference value. If it is over range, it is noted as such and is set to a value of 16383. If it is under range, it is noted as such and is set to a value of -16383.



• Communication Interface with D20ME consists of data control and formatting functions that are called by common code using application interface tables. The formatting functions place the requested data into an addressed buffer.

• Maintenance Interface implements several maintenance and diagnostic commands.

2.4.7.4 D20A Specifications

Table 10 D20A Specifications

Item Description




Inputs 32 differential inputs (typical): • ±5, ±10 V • ±1, ±2.5, ±5, ±10, ±20 mA

Input Impedance 44 Mohm ±5% (VDC)

Overall Accuracy ±0.05% (voltage), ±0.1% (current)

Temperature Coefficient ±10 ppm per °C

Resolution 12-bit plus sign

Conversion Rate (all 32 inputs) • 550 ms @ 60 Hz • 656 ms @ 50 Hz

Over voltage Rating 35 VDC

Overload Rating 200 V pp ±5 V input common mode (50/60 Hz)

Common Mode Rejection (60 Hz) • 95 dB 5 V • 90 dB 10 V

Normal Mode Rejection (60 Hz) 60 dB



D.20 Link Ports 2


Power Requirements 20-60 VDC, 7 W typical

Size 19" x 5.25" x 2.5"


• RED binary point LEDs, indicating the analog point that is currently being read.



2.4.7.5 D20A Options The following D20A termination board options are currently available:

Table 11 D20A Options


511-0101 WESDAC D20A (20-60 VDC) standard.

511-0103 WESDAC D20AHV2 (40-150 VDC) high-voltage.

517-0163 D20A 32 channel termination board with compression blocks.

517-0178 D20AD 32 channel termination board with DB25 connectors.

517-0216 D20AX 32 channel termination board with separable compression blocks.

517-0328 D20AB 32 channel termination board with barrier strips.

517-0240 D20AZ 32 channel, high voltage termination board with compression blocks.

517-0364 D20AZ 32 channel, high voltage termination board with separable compression blocks.

2.4.8 D20K Control Output Peripheral

Figure 34 D20K Control Output Peripheral

The D20K is a 32-point control output interface module. The 32 output drivers can be arranged in several hardware/software configurations, depending on the system requirements. The D20K ensures secure operation of the control output interface. All control actions requested by the D20/D200 are initiated, timed, reset and validated by the D20K.

The D20K logic module plugs directly into a D20K termination panel, which is equipped with field terminations. The D20K termination panel consists of 32 momentary control relays plus two Master Trip and Close relays. The Master Trip and Close relay contacts are wired in series with the point-select relay contacts controlling the output power for each point.

The D20K also provides a Local/Remote switch and control output fusing. The Local/Remote switch is a manually operated switch used to disable D20K relay coil power during maintenance. An off-line indication is passed to the D20 main processor, which is available as a pseudo status to the host.



2.4.8.1 Control Output Configurations The D20K can have one of the following control output configurations:

• 32 Trip/Close pairs

• 24 Trip/Close and 4 Raise/Lower pairs



• 16 Raise/Lower pairs

• 32 Isolated Form-C contact control outputs

• 32 Isolated open-drain outputs. Hardware and software can also be configured to provide a wide range of control output schemes, including parallel, pulse duration, pulse trains, and latched-output applications.

Control output duration is software-adjustable from 1 to 215 ms in one-millisecond increments, on a per-point basis (protocol dependent). The D20K software also supports discrete timed/latch relay functionality.

2.4.8.2 Interposing Relays For applications requiring heavy-duty control ratings, the D20K can be configured with interposing relays. A standard D20KI interposing relay panel, equipped with P&B KUEP and KUP interposing relays (10 A at 150 V DC and 10 A at 240V AC respectively), is used in conjunction with a D20KR termination panel. P&B KUL latch relays can also be used. See also section 2.4.9 , Interposing Relay Panel. Each D20KI, equipped with 16 relays, can be configured to supply 16 momentary, 8 trip/close or 8 raise/lower control outputs.

2.4.8.3 D20K Control Output Processing

The following control output processing is carried out by the D20K:

• Control Options: Individual digital outputs can be controlled immediately, or by using an arm execute (select before execute or select before operate) handshake. The arm time-out is programmable, on a per-system basis, to any value between 100 and 255 ms, in 1 ms increments.

• Hardware Control Security: Several levels of hardware control security are supported:

− Single relay control

− Master trip or master close relay, used in conjunction with the select relay (higher hardware security)

− Interposer relay protection, used in conjunction with the master and select relays (highest hardware security)



• Control Rules:

− If two requests are destined for the same digital output point, they will not be applied concurrently; instead, they will be applied sequentially. (Control requests can be conducted concurrently, but only if one of the requests requires a master relay.).

− If two requests requiring master relays are destined for different digital output points, they can be conducted concurrently, as long as each request is associated with a different set of master relays.

• Simultaneous Digital Output Points: D20/D200 peripherals support the simultaneous control of digital output points, where these output points must be operated at precisely the same time.

• Request Queuing: Control operations can be queued, where this is required by the application.

• Request Repetition: Control pulse trains can be generated, where this is required by the application.

2.4.8.4 D20K Base Application The base application of the D20K controls five main functions:

• Control Block Processor makes the control blocks active, sets a timer if, required, and sets bits in the relay driver to activate the relay on the next pass of the relay driver.

• Relay Driver is an interrupt-driven routine that runs every 500 µs to check the status of the relay coils. The Local/Remote switch physically cuts driver power to control relays, preventing operations in the local position. Once the switch is placed back in remote mode, normal operations resume. The relay driver also writes to the two relay-state tables, and reads back and verifies what has been written to the tables.

• Timer System is a linked-list timer that looks after the timing functions required by this application (e.g. timing of arm messages).

• Communication Interface is a set of address tables and functions that implement communication requests. Arm and Execute messages are used for all trip/close operations.

• Maintenance Interface consists of functions that provide background and on-line application diagnostics, application initialization, and maintenance displays through the maintenance port.

• Failure Detection detects loss of relay drive power, interposing power loss, and failure of an output driver.



2.4.8.5 D20K Specifications

Table 12 D20K Specifications

Item Description




Control Outputs • 32 open collector drivers for relays • Four additional open collector drivers for dedicated Master Trip/Close and Test

Breaker relays

Output Types • Momentary (fixed) • Latching • Trip/Close (T/C) • Raise/Lower (R/L) • Pulse duration • Pulse train

Non-matrixed output configurations

• 32 T/C pairs • 24 T/C + 4 R/L pairs • 16 T/C + 8 R/L pairs • 8 T/C + 12 R/L pairs • 16 R/L pairs • 32 isolated Form-C contact outputs • Optional 32 isolated open-drain outputs, rated 150 mA @ 60VDC

Contact ratings & types (typical)

D20K: • Momentary relays: 60 W max, 3 A max, 220 VDC max. (1 Form C or A)

D20KI: • Interposing relays: 10 A @ 150 VDC (1 Form X), 5 A @ 150 VDC (2 Form A), 3

A @ 150 VDC (2 Form C) • Interposing relays: 10 A @ 28 VDC (2 Form C or A) • PRD Series Relays:

− PRD3, 20 A @ 125VDC, 1 Form X − PRD11, 20 A @ 125VDC, 2 Form C, 24VDC coil − PRD11, 20 A @ 125VDC, 2 Form C, 48VDC coil

• Latching interposing relays: 10 A @ 28 VDC or 240 VAC (2 Form C) • Interposing relays (heavy duty): 20 A @ 125 VDC, 30 A @ 240 VAC (1 Form A)

Coil Status Check Every 500 µs

Contact Duration Programmable 1 to 215 ms in 1 ms intervals (protocol dependent)

Switches Local Enable/Disable Switch



D.20 Link Ports 2



Item Description


Power Requirements 20-60 VDC, 4 W typical at 24 V, 11 W max. at 24 V with all relays energized

Size • D20K logic board and D20K relay termination board assembly: 19" x 5.25" x 2.5" • D20KI1 interposing relay board (compression terminals): 19" x 5.25" • D20KI2 interposing relay board (barrier terminals): 19" x 7" • D20KR termination board for D20KI1/D20KI2: 19" x 5.25" • D20KI-OPC (517-0215): Interposing relay panel for D20SD and D20CD,

equipped with sliding link terminal blocks.


• Local (GREEN) LED, which turns on when the I/O module is set to Local module using the Local/Remote switch, or if the module’s control software has been disabled.

• Remote (RED), which turns on when the module is in Remote mode.

• Control points (RED), which turn on when the particular control point is enabled.

2.4.8.6 D20K Options The following D20K options are currently available:

Table 13 D20K Options


508-0101 WESDAC D20K (20-60 VDC) standard.

508-0103 WESDAC D20KHV (40-150 VDC) high-voltage.

517-0164 D20K 32 channel digital output termination board with compression blocks.

517-0143 D20KR 32 channel digital output termination board with DB25 connectors.

517-0218 D20KX 32 channel digital output termination board with separable compression blocks.

517-0236 D20K 32 channel digital output termination board with compression blocks and solid-state relays.

517-0242 D20K4Z 32 channel digital output high voltage termination board with compression blocks.

2.4.9 Interposing Relay Panel For applications requiring heavy-duty control ratings, the D20K can be connected to field equipment through interposing relays. The standard D20KI interposing relay panel is equipped with P&B KUEP and KUP interposing relays (10 A at 150 VDC and 10 A at 240 VAC respectively). It is used in conjunction with a D20KR termination panel, as shown in Figure 35.



D20K I/O Peripheral

Interposing Relays

Termination Panel

To Field Equipment

. . .

. . .

. . .

Figure 35 Interposing Relays

2.4.9.1 D20KI Termination Board Options The following D20KI termination board options are currently available:

Table 14 D20KI Options


517-0146 D20 KI compression termination

517-0430 D20KI1X, separateable compression termination

517-0147 D20KI2, barrier strip termination

Each D20KI, equipped with 16 relays, can be configured to supply 16 momentary, 8 trip/close or 8 raise/lower control outputs.



2.4.10 D20C Combination I/O Peripheral The D20C is a combination I/O module used for small-point-count applications. The D20C is configured with:

• 16 digital inputs and 8 momentary or dual function trip/close control outputs

• Optional 16 analog inputs

• Optional 8 analog inputs and 8 analog outputs.

D20 C1 and D20 C2 daughter boards are available as add-on options for the D20C to give additional analog inputs and outputs, as follows:

Table 15 D20C Daughter Boards

D20C Peripheral Digital Inputs

Control Outputs

Analog Inputs

Analog Outputs

D20C 16 8 - -

D20C with D20 C1 Daughter Board 16 8 16 -

D20C with D20 C2 Daughter Board 16 8 8 8

2.4.10.1 D20C I/O Processing Depending on its configuration, the D20C carries out the input and output processing described in the preceding sections for the D20S, D20A and D20K.

The D20C performs I/O processes similar to those performed by the other D20 I/O modules, but at a faster clock speed, required to meet the increased processing power demand.

The same technology is used on the D20C as on the other D20 peripheral I/O modules:

• Digital inputs are the same design as the D20 S. Chatter filtering can be applied.

• Optional analog inputs/outputs are provided through plug-in daughter boards. One shield termination is provided for every two inputs. The programmable gain feature provided on the D20A is not supported on the D20 C. The voltage-to-frequency converter is fixed at 5 V full scale.

• Control output security is the same as that supported by the D20K. Interposing relays can be supplied using a D20KI. A Local/Remote switch is provided to turn off relay coil power and put the module off-line (including analog, status and control). An off-line indication is sent to the D20 main processor, which is available to the host as a pseudo-status.

2.4.10.2 D20C Specifications For a more complete description on the status, analog and control features of the D20 C, refer to the sections on the D20S, D20A and D20K modules.



Table 16 D20C Specifications

Item Description

Processor 8-bit Freescale 68HC11 MPU Clock 3 MHz MPU clock Memory • 24 KB EPROM

• 32 KB static RAM • 512 bytes EEPROM

Analog Inputs Physical Plug-in daughter board for 16 bipolar, differential inputs Input Adapters Refer to the Index for a list of available input adapters. Accuracy ±0.05% (voltage), ±0.1% (current) Temperature Coefficient ±10 ppm per °C Resolution 12-bits plus sign Conversion Rate • 275 ms for 16 inputs @ 60 Hz

• 328 ms for 16 inputs @ 50 Hz Dynamic Range of Converter 125% of normalized full scale inputs Input Impedance 44 Mohm ±5% (VDC) Common Mode Rejection (60 Hz) 95 dB Normal Mode Rejection (60 Hz) 60 dB Over voltage Rating ±35 VDC (normal mode) Analog Inputs/Outputs Physical Plug-in daughter board for 8 unipolar or bipolar (voltage only)

outputs or 8 unipolar current outputs, and 8 bipolar inputs @ ±5 V (see Analog Inputs above)

Output Ranges • 0 - 5, 0 - 10, ±5, ±10 V • 0 - 1, 0 - 5, 0 - 10, 0 - 20 mA

Accuracy 0.1% (voltage), 0.15% (current) Resolution 12-bits plus sign Maximum Output 5 kohms @ 5 V out Status Inputs Physical 16 optically isolated inputs in two groups of 8. Inputs in one

group will share a common return and contact wetting. Contact Wetting ±12, ±24, ±48 or ±125 VDC Current Burden ±3 to ±6 mA per input Scan Rate 1.0 ms Debounce Selectable 1 to 255 ms SOE Time Resolution 1.0 ms Overload Rating 500 VDC (common mode to GND)



Control Outputs Physical 8 relays plus two Master Trip/Close relays Output Configurations • 8 T/C pairs

• 6 T/C + 1 R/L pairs • 4 T/C + 2 R/L pairs • 2 T/C + 3 R/L pairs • 4 R/L pairs • 8 isolated Form C contact outputs

Contact Duration Programmable 1 to 215 ms in 1 ms intervals or 1 to 215 s in 1 s intervals (protocol dependent)

Contact Rating 60 W max, 3 A max, 220 VDC max (1 Form-C or -A contact) Coil Status Check Every 500 µs Switches Local enable/disable switch Component Isolation Rating 1500 Vrms Dielectric Rating 1000 VDC D.20 Link Ports 2 Maintenance Port 9600 baud, RS-232 Power Requirements 20-60 VDC, 5 W typical; 11 W full load with 24 V contact wetting

Size • D20C assembly: 19" x 5.25" x 2.5" • D20C analog input & analog input/output daughter boards:

8.5" x 3"

2.4.10.3 D20C Options The following D20C options are currently available:

Table 17 D20C Options

GE Part Number

Description

504-0002 WESDAC D20C+ (20-60 VDC) standard.

504-0003 WESDAC D20CHV (40-150 VDC) high-voltage.

517-0169 D20C termination board with compression blocks for status, controls and analogs. Includes DB25 connector for D20KI/KI2 interposer panels.

517-0180 D20CD with DB25 connectors for status, controls and analogs.

517-0326 D20CB termination board with barrier strips for status, controls and analogs. Includes DB25 connector for D20KI/KI2 interposer panels.

517-0217 D20CX termination board with separable compression blocks for status, controls and analogs. Includes DB25 connector for D20KI/KI2 interposer panels.

517-0332 D20CDI 24V (isolated commons) and DB25 terminations for status, controls and analogs.



517-0239 D20C4Z termination board with compression blocks for 48VDC status inputs, controls and analogs.





2.4.11 D20AC, AC Analog Input Peripheral The D20AC, AC analog input peripheral provides AC analog computing and monitoring. It has the following features and specifications:

Table 18 D20AC Features and Specifications

Item Description

Features Up to 132 analog values and 18 accumulator values.

Accommodates direct AC analog inputs from current and voltage transformers for up to three 3-phase circuits, eliminating the need for transducers and/or metering IEDs

Integrates key substation functions such as metering, analog processing and power quality measurement

3-element and 1-element (Balance System) metering

Meter calculations include kW, kVAR, power factor, frequency, kWh, kVARh, kVAh and symmetrical components.

Power quality data: %THD (total harmonic distortion), 21st harmonic

DSP/Memory 24-bit program, 16-bit point data

16 MHz clock

1K x 16-bit internal data

2K x 24-bit internal program

14K x 24-bit external program

64K byte EPROM boot

Dual-port memory 2K bytes

CCU base system required

AC Voltage Inputs Up to 6 nominal RMS inputs: 63.5 VAC, 110 VAC (60 Hz), 69.3 VAC, 120 VAC (60 Hz)

Accuracy + 0.2% of nominal full scale

Burden < 0.1 VA

Measurement Range 250% of nominal

Continuous Over voltage 250% of nominal

Frequency Response 50/60 Hz filtered, 1300 Hz unfiltered

Sample Rate 64 samples per cycle

AC Current Inputs Up to 9 nominal RMS inputs: 1.0 A or 5.0 A (50/60 Hz)

Accuracy • + 0.2% of nominal (minimum input 2% of nominal) • + 1.0% 5 x nominal full scale • + 2.0% 10 x nominal full scale • + 3.0% 16 x nominal full scale

Burden <0.01 ohm

Thermal Overload • 4 x nominal – continuous • 30 x nominal – 10s • 100 x nominal – 1 s



Item Description

Frequency Response 50/60 Hz filtered, 1300 Hz unfiltered


DC Analog Input One DC differential analog input

Current Input One of: + 1, + 5, + 10, + 20 mA

Input Burden > 10 M voltage input, 5 K to 250 K current input (1 to 20 mA)

Overload + 30 VDC (normal mode), 200 VDC (common mode)

Accuracy + 0.05% full scale voltage input, + 0.1% full scale current input

Resolution 12 bit plus sign (minimum)

CMRR 90 dB @ 50/60 Hz, NMRR: 60 dB @ 50/60 Hz

Dynamic Range 125% full scale

References + 90% full scale zero

Conversion Time 16.7 ms (60 Hz), 20.0 ms (50 Hz)

Temperature Coefficient + 15 ppm oC voltage input, + 30 ppm oC current input


D.20 Link Ports 2


Power Requirements • 40 – 150 VDC, 5 W typical • 20 – 60 VDC, 8 W

2.4.11.1 D20AC Options The following D20AC WESDAC and WESTERM options are currently available:

Table 19 D20AC Options

D20AC Option Description

WESDAC D20AC (40-150V, 511-0104) Standard version of the AC analog input peripheral logic panel, supporting up to six 50/60 Hz AC voltage inputs, and up to nine 50/60 Hz AC current inputs. The 511-0104 requires a power source between 40 and 150 VDC.

WESDAC D20AC (20-60V, 511-0106) Standard version of the AC analog input peripheral logic panel, supporting up to six 50/60 Hz AC voltage inputs, and up to nine 50/60 Hz AC current inputs. The 511-0106 requires a power source between 20 and 60 VDC.

WESTERM D20ACL 3VT/3CT (517-0380) Termination panel for the D20AC, supporting three AC voltage inputs and three AC current inputs, which connect through a barrier terminal strip.

WESTERM D20ACL 3VT/6CT (517-0381) Termination panel for the D20AC, supporting three AC voltage inputs and six AC current inputs, which connect through a barrier terminal strip.

WESTERM D20ACL 3VT/9CT (517-0382) Termination panel for the D20AC, supporting three AC voltage inputs and nine AC current inputs, which connect through a barrier terminal strip.



D20AC Option Description

WESTERM D20ACL 6VT/3CT (517-0383) Termination panel for the D20AC, supporting six AC voltage inputs and three AC current inputs, which connect through a barrier terminal strip.

WESTERM D20ACL 6VT/6CT (517-0384) Termination panel for the D20AC, supporting six AC voltage inputs and six AC current inputs, which connect through a barrier terminal strip.

WESTERM D20ACL 6VT/9CT (517-0385) Termination panel for the D20AC, supporting three AC voltage inputs and three AC current inputs, which connect through a barrier terminal strip.

WESTERM D20AC 3VT/3CT (517-0370) Similar to the 517-0380; however, the unit does not support power through the D.20 Link.






2.5 D20/D200 Power Supplies and Chargers D20 power supplies are switch-mode converters that provide output power for the D20 main processor, VME cards, modems and D20 peripheral I/O modules, as required. The power supplies are designed to accept standard voltage inputs and meet the power requirements of the D20/D200.

These power supply modules mount vertically in the D20/D200 chassis, as shown in Figure 36 and Figure 37.

Figure 36 D20 Power Supply



Figure 37 D200 Power Supplies

2.5.1 D20 Power Supply Specifications The following table gives details of the standard chassis-mounted, auxiliary and redundant power supplies that are available. Other power supplies are available for specific requirements. Contact GE Grid Solutions for details.

Table 20 D20/D200 Power Supplies

Type Part Number Input Output Mounting

Chassis-mounted (D20)

580-2004 20 – 60 VDC +5 V, 7 A +12 V, 2 A -12 V, 1 A

24 VDC, 3 A

Chassis


580-2005 20 – 60 VDC +5 V, 7 A +12 V, 2 A -12 V, 1 A

48 VDC, 1.5 A

Chassis


580-2006 100 – 300 VDC or

85 – 264 VAC

+5 V, 7 A +12 V, 2 A -12 V, 1 A

24 VDC, 3 A

Chassis


580-2007 100 – 300 VDC or

+85 – 264 VAC

+5 V, 7 A +12 V, 2 A -12 V, 1 A

48 VDC, 1.5 A

Chassis


580-0301 48VDC +5 V, 12A Chassis


580-0300 48VDC ±12V, 2A ea. Chassis


580-0299 115/230VAC +5 V, 12A Chassis



Type Part Number Input Output Mounting


580-0298 115/230VAC ±12 VDC, 2A ea. Chassis

Auxiliary 521 - 0103 20 – 60 VDC 24 VDC, 75 W Rack-mounted


Auxiliary 521 - 0105 90 – 250 VAC 24 VDC, 75 W Rack-mounted


Auxiliary 521 - 0107 90 – 250 VAC 48 VDC, 120 W Rack-mounted

Redundant 580 - 0719 115 VAC 125 VDC

24 VDC, 5A Rack-mounted


48VDC, 2.5A Rack-mounted


48 VDC, 2.5A Rack-mounted

Redundant 510 - 0241 115 VAC + 15% 30 – 60 VDC

48 VDC, 2.5 A Rack-mounted

Redundant 510 - 0242 115 VAC + 15% 40 – 144 VDC

48 VDC, 2.5 A Rack-mounted

2.5.2 D20 Battery Chargers GE Grid Solutions offers the following battery chargers:

Table 21 D20/D200 Battery Chargers

Type Part Number Input Output

WESDAC Battery Charger (48V) 550-0039 120/240 VAC 48 VDC

WESDAC Battery Charger (24 V) 550-0024 120/240 VAC 24 VDC



2.6 D20 Modems The D20 modems handle communications to the host computer or other intelligent device.

Special modem requirements can be addressed through the use of third-party modems, which are connected to the D20/D200 through external RS-232 connections. Refer to Table 22 for details.

Table 22 D20/D200 Modems

Modem Specifications

WESDAC 202/V.23

• 1200 bps Bell 202 or CCITT V.23 • Designed for 300 to 1200 bps asynchronous operation

on unconditioned lines • Available as a 19" rack-mount assembly (GE Part

Number 520-0090), or as a 3U vertical-mount module that can be installed in the D20/D200 chassis (GE Part Number 520-0120).

Telenetics V.3600

• V.34/V.42.bis • 2-wire, full-duplex dial-up or leased line; 4-wire, full-

duplex leased line • Data rates up to 33.6 kbps • 0 to +50oC, 0 to 95% non-condensing

Telenetics MIU9.6FPD, MIU/PowerPort9.6FPD

• Substation hardened, surge protected • 2-wire half duplex, 4-wire full duplex • Data rates up to 57.6 kbps • -40 to +85oC, 0 to 95% non-condensing • Point-to-point, or multipoint configurations

Telenetics Chassis-mount

• Dial-up or leased line • 2-wire or 4-wire • Various versions available, up to 57.6 kbps



Modem Specifications

Westermo TD-34

• Designed for extreme industrial environments • 2-wire half duplex, 4-wire full duplex • Data rates up to 33.6 kbps • -40 to +70oC, 0 to 95% non-condensing • 35 mm DIN-rail mounting

2.6.1 WESDAC 202/V.23 Modem Specifications Table 23 WESDAC 202/V.23 Modem Specifications

Item Description

Mounting • Chassis (520-0120) • Rack (520-0090)

Standards Jumper configurable for: • Bell 103 and 202 • CCITT V.23

Circuits • 2 wire half-duplex • 4 wire half- or full-duplex

Equipment Interface RS-232/CCITT V.24 data interface

Data Rate 300 and 1200 bps

Transmit and Receive Frequencies

• Bell 202: Mark 1200 Hz, Space 2200 Hz • CCITT V.23: Mark 1300 Hz, Space 2100 Hz

Transmit Output Level • -45 dBm to +2.0 dBm • Continuous or RTS-keyed

Receive Sensitivity • Jumper configurable for steps -42, -36, -30, -24, -18, or -12 dBm • 5 dB typical carrier dropout hysteresis

Soft Carrier Turn-Off • WESDAC 202/V.23 (vertical): Fixed at 8 ms • WESDAC 202/V.23 (rack): 24 ms, optional 7910 chip • Soft carrier frequency 900 Hz

DCD on Detection of Carrier

3 to 7 ms maximum

DCD on Loss of Carrier 3.4 to 11.3 ms maximum

CTS Delay after RTS • 8 ms • RTS - CTS delay set on software

Line Impedance 600 ohms

LED Indicators Tx, Rx, DCD, RTS (all RED)



Item Description

Jack • WESDAC 202/V.23 (vertical): RJ11 telephone jack for line connections • WESDAC 202/V.23 (rack): Optional integral or external jack termination

(Line, monitor and equipment, for both Tx and Rx).

Protection • 1500 V line isolation • SWC ANSI/IEEE C37.90.1-1974 (2.5 kV) • SWC (Fast Transient) ANSI/IEEE C37.90.1-1989 (5.0 kV) • Relay systems test, in accordance with ANSI/IEEE C37.90-1978 • Optional impulse/lighting protection gas-tube arresters

Error Rate • Back-to-back error rate is 1 bit error in 60,000 at 1200 bps

Mechanical WESDAC 202/V.23 (rack)

• Dimensions: 1.75" (4.4 cm) x 19" (48 cm)

WESDAC 202/V.23 (vertical) • Vertical mounting in D20/D200 chassis card slot, as shown in Figure 16 and

Figure 17. • Screw compression type terminals for 2W/4W connections. Female DB25

connector for RS-232 connection.

Environmental • Temperature: -20 C to +60 C • Humidity: 0 to 95% non-condensing

2.7 Communications The D20/D200 interfaces with peripherals and external devices over several types of communications facilities:

Table 24 D20/D200 Communications Links

Type Properties

RS-232 • Each installed D20ME and D20ME II provides seven RS-232 serial ports. In the D20ME II, each port can be programmed as an RS-232 or an RS-485 port

• Ports operate independently, at data rates up to 38400 bps • Each RS-232 port can provide point-to-point communication between the D20/D200 and:

− IED or − Serial peripheral, such as a printer or terminal

RS-485 • D20ME II main processor can be jumper-configured with RS-485 ports to provide point-to-multipoint communications to substation equipment, at distances up to 4000 ft

Note: The RS-485 port on the D20ME II provides no isolation and offers limited built-in transient suppression. If you are using the D20ME II in an environment where longer cable runs with larger transients are expected, installation of an external transient suppression device is recommended to protect the RTU. In addition, GE recommends the installation of an external transient suppression device when the RS-485 communication cable must be run to devices located outside of the RTU cabinet containing the D20ME II. Contact GE Grid Solutions Technical Support for additional information.



Type Properties

D.20 Link • Provides communications between the D20/D200 main processor and D20 I/O peripherals • Two D.20 Links per main processor • High-speed, high-level data link (HDLC/X.25) • RS-485 serial link, half duplex, 250 kbps • Transformer-coupled/isolated for high reliability and protection from electrically noisy

environments • Manchester-encoded for increased data integrity • Dual communication channels for backup communications • Shielded LAN cable or a glass/plastic fiber optic cable • RS-485 to multi-mode fiber-optic converters are available to extend the distance range of the

D20/D200, or to improve system noise immunity • Each D.20 Link supports the following:

D20ME/ME II in D20 Chassis

D20ME/ME II in D200 Chassis

Without Repeaters Up to 31 I/O Peripherals Up to 31 I/O Peripherals

With Repeaters Up to 120 I/O Peripherals Up to 120 I/O Peripherals

Ethernet • D20/D200 supports communication with substation equipment through two Ethernet ports • D20EME Ethernet Memory Expansion module provides two independent Ethernet channels

using one of the following formats:

10BASE-T Provides two RJ-45 connectors for connecting to CAT5, or greater, UTP cabling

10BASE2 Provides two BNC connectors for connecting to thin coax cabling

10BASE-FL Provides two ST-style connectors for directly connecting to a single or multi-mode glass or plastic fiber optic cable

2.8 D.20 Link The D20 main processor communicates with D20 peripheral I/O modules over a high-speed, high-level data link (HDLC) called the D.20 Link. The D.20 Link is an RS-485 serial link, operating half-duplex at 250 kbps. The link is transformer-coupled/isolated for high reliability and protection from electrically noisy environments. A fiber-optic communications link, which has greater noise immunity to power switching transients and voltage gradients, is also available.

The D.20 Link protocol is a partial emulation of the standard X.25 protocol. This communications protocol uses the HDLC format with Manchester encoding.

Using a D.20 Link, the D20 main processor can support up to 31 D20 I/O peripheral modules in a standard configuration. Repeater/extension modules may be used to expand beyond this limit to a maximum of 120 (D20) or 480 (D200) peripheral I/O modules.

The D20/D200 can be equipped to provide D.20 Link redundancy, as described in section 2.9.2 , D.20 Link Redundancy.



2.8.1 Designing a Distributed D20 Network To set up a distributed D20 peripheral I/O network design, three key factors need to be considered:

• Peripheral configuration of each remote location

• Approximate distance between peripheral locations

• Type of cable (RS-485 serial, plastic fiber, or glass fiber)

Generally, an RS-485 serial link is used for short distances, such as between D20 modules located close together on a rack or mounted in a group, and a fiber optic link is used to extend the D.20 Link to remotely located modules or in electrically noisy environments. When the D.20 Link is installed outside the substation control house, GE Grid Solutions highly recommends the use of a fiber optic cable.

For more information on planning a D.20 Link, refer to Appendix G, D.20 Link Installation.

D20 modules are configurable in star- or daisy-chain networks. Refer to Figure 38 for an example of a D.20 Link configuration.

LegendDCI - D.20 Communications InterfaceDFS - D.20 Fiber Splitter

D20A

DCI or DFS

D20K

D20S

D20

Power/RS485Cables

DCI

DCI or DFS

Power Supply

Power/RS485Cables

(1 of 4 links, if DFS)PFO or GFO Cable

Power Supply

DCI

D20C

D20S

Power/RS485Cables

Example D.20Configuration

OptionalFiber Repeater

Remote I/O

D20A

D20S

Termination

Figure 38 D.20 Link Example Configuration

To interconnect D20 modules with an RS-485 serial link or a fiber optic link, certain communications equipment is needed:

• D.20 Communication Interface or D.20 Fiber Optic Splitter with a fiber optic adaptor between the D20 main processor (or the last peripheral on an RS-485 serial link), and the start of the fiber optic link



• D.20 Communication Interface with a fiber optic adaptor at the end of the fiber optic cable to convert back to an RS-485 link, for interconnecting remotely located D20 peripheral I/O modules.

• Cable and connectors

• Power supply

2.8.2 D.20 Communication Interface The D.20 Communication Interface is used as a repeater module for systems requiring more than 31 D20 I/O peripheral modules. It facilitates extension to a maximum of 120 D20 I/O peripherals on a single HDLC communication port. The DCI can also be used to extend the distance range of the D20/D200:

D20 CommunicationsInterface

From D20/D200, or fromupstream I/O Peripherals

To extend the rangeof the D.20 Link

To downstreamI/O Peripherals

Figure 39 D.20 Communications Interface

The D.20 Communication Interface (DCI) provides a 1:1 interface between an RS-485 serial D.20 Link and one fiber optic D.20 Link. The DCI has two RS-485 D.20 ports, one input port and one port for continuing the D.20 Link daisy chain. The fiber cable connects to the DCI via either a plastic (PFO) or glass (GFO) fiber adaptor, which plugs onto the DCI module. The DCI installs on a standard 19" rack and is one rack unit high. See Figure 40.

D.20 COMMUNICATION INTERFACE 520-0117

*Project SpecificD.20 RS485 Interface Adaptor, PFO Adaptor,

or GFO Adaptor may be equipped.D.20 Link

D.20 Link

D.20 Link

D.20 Link

Figure 40 D.20 Communication Interface

At the end of the fiber optic link, another DCI is used (with the appropriate glass or plastic fiber optic adaptor) to convert from the fiber optic link back to the RS-485 serial D.20 Link that interconnects the remote D20 peripheral I/O modules.



2.8.3 Adapter Modules Plug-on adaptor modules are available for connecting RS-485 serial, plastic or glass fiber cables to the D.20 Communication Interface and the D.20 Fiber Optic Splitter modules.

• GFO: Glass fiber optic adaptor with an SMA screw lock or ST twist lock connector

• PFO: Plastic fiber optic adaptor with a snap-in lock connector

• RSR: RS-485 repeater

RSRHDLC HDLC

PFO/GFO

HDLC F.O.

RS-458 Repeater

RS-458 to Fiber Converter

D.20 Link

D.20 Link

D.20 Link

D.20 Link

D.20 Link

D.20 Link

D.20 Link

D.20 Link

Figure 41 DCI Modes of Operation

2.8.4 D.20 Fiber Optic Splitter The D.20 Fiber Optic Splitter (DFS) is used to break out the D.20 Link into four separate D.20 Links, for applications with clusters of peripherals at different locations:

D.20 SplitterHDLC

From D20/D200, or fromupstream I/O Peripherals

To split out the D.20 Link

Up to fourD.20 Links

F.O.

F.O.

F.O.

F.O.

Figure 42 D.20 Fiber Optic Splitter

The D.20 Fiber Optic Splitter (DFS) provides a 1:4 interface between the RS-485 serial D.20 Link and up to four fiber optic links. The DFS has two RS-485 ports, one input port and one port continuing the D.20 Link daisy chain. Up to four plastic or glass fiber optic adaptors plug onto the DFS module to connect the fiber cables. See Figure 43. The DFS installs on a standard 19" rack and is two rack units high.



D.20 SPLITTER 520-0118

*Project SpecificUp to four PFO or GFO adaptors may be installed

D.20 Link

D.20 Link

Figure 43 D.20 Fiber Optic Splitter

2.8.5 Communication Cables

2.8.5.1 RS-485 Twisted Wire Shielded cables are required, with one end of the cable shield properly grounded. The D20/D200 and peripherals must be securely and properly grounded within metal enclosures, according to recommended industry practices. RS-485 cabling must meet the following specifications:

• IEEE 802 standard LAN cables: Belden® 9891 Ethernet or Alpha 9852 Ethernet

• 4 pair #22 AWG [0.644mm] stranded tinned copper

• Outer jacket: PVC, 0.032" thick

• Conductors: Color-coded PVC, 0.01" thick

• Shield: #22 AWG [0.644mm] aluminum/polyester tape

• Temperature/Voltage: -20 to +80 C, 150V

• Flammability: Passes UL VW-1 flame test

• Maximum Length: 1000 ft / 300 m

2.8.5.2 Plastic or Glass Fiber For remote distributed network peripherals, fiber optic cable is recommended for outdoor switchyard applications.

• Recommended core sizes: 1 mm plastic optical fiber or 200 mm hard clad silica (HCS), 50/100 mm, 62.5/125 mm and 100/140 mm.

• Wavelength: 660 nm (plastic,) 820 nm (glass)

• Maximum Length (without repeaters)

− Plastic: 146 ft / 45 m

− Glass: 6500 ft / 2000 m



2.8.6 Power Requirements To ensure the low threshold of 20 V input to the peripheral is met, the number and type of peripherals and location on the D.20 Link is reviewed with respect to cable IR drop. If the IR drop is exceeded, remote D20 peripherals and DCIs will require a local 24/48 V DC power supply. For 125 V systems, employ a WESDAC Power Converter (125 V DC/AC input, 24 V or 48 V DC output) for local operation of D20 peripherals and DCIs.

The D.20 Communication Interface and D.20 Fiber Optic Splitter require 24/48 V DC power. This power may be supplied from standard D.20 cable, if available. Remote D20 peripherals are normally powered via the D.20 line using a #20 AWG [0.812mm] cable.

Typical power requirements for D20 modules are summarized in Appendix E, Power Consumption – D20 Modules. When using a 20-60 V DC input for powering a D20 Power Supply, the peripherals obtain power directly from the input source (after switched and fused).

2.9 Redundancy The D20/D200 supports the following fault-tolerant system configurations:

• Single D20/D200 with single D.20 Link

• Single D20/D200 with two D.20 Links

• Redundant D20/D200 system with single LAN (illustrated in Figure 44)

• Single D20/D200 with loop redundancy (illustrated in Figure 45)

• Single D20/D200 with redundant LAN (illustrated in Figure 46)

• Redundant D20/D200 system with redundant LAN



2.9.1 D20/D200 Redundancy To provide high reliability, two D20s (with VME chassis) or D200s can be joined via a dedicated communication channel to form a redundant RTU assembly, as illustrated below:

Figure 44 D200 Redundancy

Each D20/D200 contains identical hardware and software. The connection to field equipment is made through an RS-232 Switch Panel. The position of the RS-232 Switch Panel, set either automatically or manually, determines which D20/D200 is active.

On power up, the active D20/D200 initializes to an “Active Polling” state, acquiring data from all substation devices and any local peripheral I/O reporting to it. Controls are executed as directed by the master host system.

The standby D20/D200 monitors the state of the active D20/D200 via the inter-CCU communications circuit. The standby D20/D200 operates in a warm standby mode; it does not actively poll for data or execute controls. Some data may therefore be lost during a fail-over, depending on the timing of the fail-over with respect to polling activity (i.e., the system is not hot standby).



If detected, the following hardware failures will result in a fail-over from the active to the standby D20/D200:

• Power failure

• Background diagnostic error

• Bus error

• Watchdog timer reset

When a failure of the active D20/D200 is detected, the standby D20/D200 is switched to an “active” state, at which point it will initiate data collection and control functionality. The standby D20/D200 completes a full update of its databases at this time. The originally active D20/D200 is disabled, with no fail-back operation. The standby D20/D200 system remains in the “Active Polling” state, until manually restored to its original configuration.

A switchover can be manually forced from the RS-232 Switch Panel, or through the WESMAINT maintenance interface.

2.9.2 D.20 Link Redundancy In addition to equipment redundancy, the D20/D200 can be equipped to provide D.20 Link redundancy using D.20 Loop Redundancy or D.20 Link Redundancy. A D20 system with loop redundancy is illustrated in Figure 45.

D20/D200

I/O Peripheral

I/O Peripheral

I/O Peripheral

D.20 Link A D.20 Link B

FailureScenario 1

D20/D200

I/O Peripheral

I/O Peripheral

I/O Peripheral


FailureScenario 2

Figure 45 Single D20/D200 with Loop Redundancy

With D.20 Loop Redundancy, cabling is daisy-chained from D.20 Port A through all of the I/O peripherals, then the last I/O peripheral in the chain is connected back to D.20 Port B. Normally, the D20/D200 will communicate with the I/O peripherals alternately through D.20 Link A and D.20 Link B. In this way, the D20/D200 is able to regularly confirm the integrity of both



communications links with all I/O peripherals. It will know immediately if there is a problem with the link, and can raise an alarm, if necessary.

In the case of Failure Scenario 1, the D20/D200 will still be able to communicate with the I/O peripherals through D.20 Link B. In the case of Failure Scenario 2, the D20/D200 will communicate with some peripherals through D.20 Link A, and others through D.20 Link B.

Full D.20 Link Redundancy can be implemented, as shown in Figure 46:

D20/D200

I/O Peripheral

I/O Peripheral

I/O Peripheral


FailureScenario 3

D20/D200

I/O Peripheral

I/O Peripheral

I/O Peripheral


FailureScenario 4

Figure 46 Single D20/D200 with Redundant LAN

This method requires the installation of a D.20 Link interface card (GE part number 540-0207) on each I/O peripheral WESDAC board. As shown in Figure 46, each D.20 port in the D20/D200 is physically connected to each I/O peripheral. This connection could be implemented in a single set of cables; however, this would limit the benefit of D.20 Link Redundancy since a cable cut could damage both links. Instead, it would be more beneficial to implement LAN redundancy using separate cables and cable routing. A D20 Adapter (GE part number 540-0313), installed at each I/O peripheral, allows both D.20 Link A and D.20 Link B cabling to be connected to the peripheral.

In the case of Failure Scenario 3, the D20/D200 will still be able to communicate with the I/O peripherals through D.20 Link B. In the case of Failure Scenario 4, the D20/D200 will communicate with some peripherals alternately through D.20 Link A and D.20 Link B, and with others solely through D.20 Link B.

2.10 Auxiliary Equipment

2.10.1 Universal Protocol Converter A Universal Protocol Converter (UPC) is required when the D20/D200 will interface with devices that use synchronous protocols. The UPC converts the D20 asynchronous format to the device’s synchronous format.



2.10.2 Data Display Panel The Data Display Panel provides an economical means of displaying up to 150 digital and 150 analog input points from a D20/D200. Any data point available in the D20/D200 database can be viewed from a single data display panel, and all information displayed can be scaled to engineering units for easy interpretation. Seven pre-configured screens are available for easy set-up, and an additional 30 user-defined screens that can be configured using SGConfig.

The Data Display Panel is available in two versions, one that can be installed directly on a 19” rack and one that is installed directly onto a D20 chassis, as shown in Figure 47:

Figure 47 Data Display Panel

2.10.3 Fiber Optic Interfaces Fiber-optic communications links, with greater noise immunity to power-switching transients and voltage gradients, are available for RS-232 and RS-485 serial links.

GE Grid Solutions is currently recommending the use of Dymec 5843/5844 single- and multi-mode industrial fiber optic links and repeaters:

Table 25 D20/D200 Fiber Optic Links

Dymec 5843/5844 Parameter Multimode Single Mode

Optical Budget 19.5 dB 19 dB

Optical Power (typical) -10.5 dBm peak -14.5 dBm peak

Receive Sensitivity -30 dBm peak -33.4 dBm peak

Wavelength 850 nm 1310 nm

Connector Type ST ST

Data Rate DC to 250 kbps DC to 250 kbps

Transmission Distance Up to 5000 meters Up to 30K meters

Bit-error Rate 1 x 10-9 max 1 x 10-9 max



3. Configuration and Maintenance Software

The D20/D200 is equipped with a range of maintenance utilities to assist the user in configuring, testing and monitoring the system:

3.1 SGConfig SGConfig is a tool, installed on a personal computer, which helps you manage information associated with your GE Enegy equipment. The primary use of SGConfig is to facilitate the configuration of D20/D200 hardware and software through the maintenance port on the main processor and I/O peripheral.

Information is accessed through a hierarchy of windows, as follows:

Project Window Provides a graphical representation of your project. Each device in the project is represented by a corresponding icon. Connections between devices are shown by a series of lines and arrows.

Device Window When you double-click on a device, the device window is opened in the main area. The device window will display all of the configurable applications for the device. The device window has four tabs:

Data Collection Applications

Data Translation Applications

System Point Database Applications

Data Processing Applications

Application Window Displays the tables for a particular application.

Report Window Allows you to select and print reports.

3.2 LogicLinx The LogicLinx application is a powerful tool that allows the user to program PLC-like logic functions in the D200 environment. LogicLinx consists of an executor, running in the remote device firmware and an editor, running in a Windows PC environment, which is used to create the desired programs. LogicLinx is compliant with all five programming languages defined in the IEC 61131-3 standard.

3.3 WESMAINT WESMAINT is a maintenance facility that resides on the D20 and D200. It uses a series of menus and screens displayed on a PC or VT100 terminal to create a simple interface. WESMAINT presets a window through which field technicians and programmers can look directly into the equipment to view collected data and system status and, for some applications, make changes to the configuration.



Using the WESMAINT facility, you can access standard data displays such as:

• Digital inputs and outputs

• Analog inputs and outputs

• Transition counters

• Sequence-of-event (SOE) and change-of-state (COS) data

• Device status information

• Error log

• User log

• System status

• CCU (central control unit) communication status, if a redundant system is installed.

3.4 PROMAINT Similar to WESMAINT, PROMAINT is the maintenance facility for the I/O peripheral modules. PROMAINT combines maintenance and monitor functions. The maintenance portion is used to view data, or to verify that the board is functioning correctly by, for example, forcing a control point and then checking to see whether the control operation took effect.

This monitor facility is intended for advanced users to interpret commands from the maintenance port, such as storing data to memory. It can also execute various application-dependent commands once an application program has been downloaded from the D20/D200.

3.5 68K Monitor The 68K Monitor functions are primarily debugging tools that users can access via a PC or a VT100 terminal with a keyboard. Monitor functions include memory examination, dumping and editing, setting break points, single-step modes, communication port loop-back tests, mark and space modem adjustments, and CPU usage and process profiling.



4. Application Software

The D20/D200 can be equipped with a wide range of substation automation and enhanced SCADA applications, some of which are summarized below:

4.1 User Programmable Logic Calculator DTA Soft logic utility to perform mathematical and logical operations

LogicLinx DTA IEC61131-3 compliant PLC type logic with full support for 5 programming languages

4.2 Generation, Transmission, and Feeder Bay Automation Applications

Automatic Voltage Control DTA Maintain steady voltage based on user-defined targets and settings

Local / Remote DTA A master local/remote switch to control the local/remote state of distributed devices

Secondary Master Trip/Close DTA Enables the use of individual relays (with external terminations) as master trip/close relays

Setpoint Adjustment DTA Adjust setpoints based on control request durations or analog input values

Tap Position Indication DTA Translate status points into scaled analog input values to reflect transformer tap positions

4.3 Distribution Automation Applications Auto Reclose DTA Automatically reclose tripped circuit breakers following momentary

faults

Automatic Restoration DTA Patented load transfer scheme isolates faults and restores power to non-faulted sections if possible

Distribution Capacitor Control Algorithm DTA

Improve reactive support during peak periods through more effective use of existing capacitor banks

Fault Localization DTA Locate and isolate faults to reduce customer outage times

Load and Dead Bus Transfer DTA Monitor a network of substations and move load off overloaded transformers to other stations as required

Load Shedding/Curtailment DTA Shed load intelligently during overload conditions



4.4 Communication Services Applications Communication Watchdog DTA Monitor and report the health of communications

Substation Maintenance DTA Suppress SCADA point reporting during substation maintenance

Virtual Terminal DTA Direct remote access to connected devices

Line Switch DTA Monitor main and secondary communication channels and retransmit on a third channel

LAN Services DTA TFTP, SPT Server/Client, Time Server/Client

COM Statistics DTA Detailed communication pass/fail statistics

IRIG B Source DTA Time sync connected devices using IRIG-B

SNTP Client DTA Time sync over an Ethernet LAN

4.5 Data Logging / Storage Applications SOE Local Logger DTA Log digital and analog SOEs to an external printer, PC or to a

CSV file

Accumulator Freeze DTA Coordinate freezing of accumulator groups

Event Storage DTA Store history of current values, status, and time-tags of analogs and accumulators for up to 7 days

Historical Analog DTA Store averaged historical values for up to 8 analog inputs

4.6 Data Reduction and Summarizing Applications Analog Reference DTA Monitor analog input hardware for good or bad reference values

Data Change Detect DTA Toggle a status point every time any data in a configured group changes

Alarm Prioritization DTA An alarm filter designed to manage the 3 level alarms reported by GE’s DART pole-top/pad-mount distribution RTU

Analog Averaging DTA Average analogs at regular intervals

Analog Alarm DTA Alarm when analogs exceed configured thresholds

General Alarm DTA Group alarms together to create summary alarms

Top of Hour (TOH) Analog Averaging DTA

Average analogs at regular intervals relative to the top of the hour

Redundant I/O DTA Provide data from a backup source if the primary source is off-line



4.7 Data Conversion Applications Digital-Analog Value Conversion DTA

Convert digital input groups to analog data using binary, BCD, or gray code encoding

Digital Input to Counter DTA Count the number of SOE or COS transitions on status points

BCD Setpoint DTA Translate analog output requests into a group of BCD encoded control points

Accumulator Delta to Analog DTA Convert accumulators to analog values for protocols that do not support counters

Time Stamp DTA Interpret each bit in an analog input as a status point, and create SOEs appropriately

Analog to Digital Conversion DTA Convert analog inputs into groups of binary coded control outputs

Mailbox DTA Convert analog outputs into analog inputs so they can be read by all masters

4.8 Other DTAs AGA Gas Flow DTA Gas flow rate and energy flow rate calculations



5. Frequently Asked Questions

The following section responds to some frequently asked questions about the D20 and D200:

5.1 What is the performance of the D20 and D200? The performance of D20 and D200 systems depend on a number of factors. These include:

1. The number of applications running in the system; automation applications such as LogicLinx can consume extensive CPU resources when running large algorithms

2. The number of D20 peripherals

3. The number of communication ports being used

4. The number of devices attached to each communication port

5. The baud rate or total baud rate of the system (the total baud rate is the combined baud rate of each of the active communication ports)

6. If the system is Ethernet equipped

7. The number of nodes or D20ME processors

GE recommends that you consult with us to ensure that proper design considerations have been taken into account to maximum the performance of your D20/D200 system.

5.2 What is the difference between the D20 and the D200? The D200, which uses the same hardware modules as those used in the D20, has a much higher capacity than the D20. The D200’s larger chassis can support up to seven vertically mounted D20ME II processors, which, in turn, are each capable of supporting two D.20 and seven RS-232/485 ports. GE recommends that our customers consult with us when using more that four D20ME or D20ME II processors to ensure proper system performance.

Where a D20 can support two D.20 and seven RS-232 or RS-485 ports, the D200 can be equipped with up to:

− Two redundant D.20 channels, supporting up to 240 I/O peripherals (120 per redundant pair)

− 49 RS-232 or RS-485 ports (seven per D20ME II Main Processor)

5.3 Will VME cards work with my non-VME systems? No. VME cards may appear to work in non-VME chassis; however, they are not designed or tested to do so. Non-terminated VME circuitry can cause unexpected RTU resets or failures. GE Grid Solutions does not endorse the use of VME D20/D200 cards in non-VME systems, or vice versa.



5.4 What is the I/O capacity of a D20 system? The D20 can support up to:

− One redundant D.20 channel, supporting up to 120 I/O peripherals

− Seven RS-232 or RS-485 ports

− Two Ethernet ports

For example: On each of its two D.20 ports, the D20 can support the following:

Example I/O Peripherals Providing

A 120 - D20 S 7680 status inputs (120 x 64)

B 120 - D20 A 1920 analog inputs (120 x 16)

C 100 - D20 A

20 - D20 S

1600 analog inputs (100 x 16) and

1280 status inputs (20 x 64)

5.5 What is the I/O capacity of a D200 system? The D200 can support up to:

− Four D.20 ports (two per main processor), supporting up to 240 I/O peripherals

− 49 RS-232 or RS-485 ports (seven per main processor)

− Two Ethernet ports

For example: On each of its four D.20 ports, the D200 can support the following:

Example I/O Peripherals Providing

A 240 - D20 S 15,360 status inputs (240 x 64)

B 240 - D20 A 3840 analog inputs (240 x 16)

C 200 - D20 A

40 - D20 S

3200 analog inputs (200 x 16) and

2560 status inputs (40 x 64)

5.6 What are the added features of the ME II Main Processor over the ME Main Processor?

Equipped with a D20ME II Main Processor, the D20/D200 can support RS-485 communications on all seven communications ports. End devices can be supported at distances up to 4000 feet, and the D20/200 can support up to 32 devices on each communication port, without the need for external converters.



A. Specifications and Supported Standards

Standard Description D20/D200 with standard D20A, D20S, D20K,

D20C

D20/D200 with high-voltage peripherals: D20AHV, D20SHV, D20KHV, D20CHV

Envi

ronm

enta

l

IEC 60068-2-1 Cold -10oC / 96 hr D20: -20oC /96 hr

D200:0oC /96 hr

IEC 60068-2-2 Dry Heat +55oC / 96 hr +55oC / 96 hr

IEC 60068-2-6 Vibration 10 - 150Hz 1g 10 - 150Hz 1g

IEC 60068-2-27 Shock Class 1: 15g, 3 axis Class 1: 15g, 3 axis

IEC-60068-2-29 Bump Class 1: 10g, 3 axis, 2000 bumps/axis

TBD

IEC-60068-2-78 Damp Heat Steady State +40oC 95% RH, 96 hr +40oC 95% RH, 96 hr

IEC-60068-2-31 Drop and Topple TBD TBD

MIL-STD-810E Transportation TBD TBD

EMC

EN 50081-2,

EN 50082-2

EMC Compliance TBD Comply

EN 55011 Radiated and Conducted Emissions

TBD Class A

EN 61000-3-2 Harmonics (230 VAC supply) Comply Comply

EN 61000-3-3 Flicker (230 VAC supply) Comply Comply

EN 61000-4-2 Electrostatic Discharge TBD Level 4: 8 kV / 15 kV



Standard Description D20/D200 with standard D20A, D20S, D20K, D20C


EMC

(con

tinue

d)

EN 61000-4-3 Immunity to Radiated Emissions, 80 - 1000 MHz

Level 3: 10 V/m Level 3: 10 V/m

EN 61000-4-4 EFTB TBD Level 4: 4 kV (2 kV coms)

EN 61000-4-5 Surge Immunity TBD Level 4: 4 kV / 2 kV

EN 61000-4-6 RF Immunity TBD Level 3: 10 Vrms

EN 61000-4-8 Magnetic Immunity TBD Level 5: 100 A/m (1 kA/m)

EN 61000-4-10 Damped Oscillatory Magnetic Field

TBD Level 5: 100 A/m (1 MHz and 100 kHz)

EN 61000-4-11 Voltage Dips and Interruptions (AC power supply)

Class 3: 0, 40, 70, 80% dips

0%Voltage Loss Hold-Up time ( Short Interruption): 400ms

TBD

EN 61000-4-12 High Frequency Oscillatory Level 4: 2.5 kV Level 4: 2.5 kV

EN 61000-4-16 Immunity to Conducted Common Mode Disturbances 0 – 150 kHz

TBD Level 4: 30 V (300 V 1 sec)

EN 61000-4-17 Immunity to Ripple on DC Power Port

Level 4: 15% ripple TBD

EN 61000-4-29 DC Supply Interruptions 40, 70% dips.1000ms

0%Voltage Loss Hold-Up time (Short Interruption): 300ms

TBD

Safe

ty

EN 61010-1 Product Safety TBD Comply

IEC 60255-5 Dielectric Strength 1 kVDC 2.5 kVDC

IEC 60255-5 Impulse 5 kV 5 kV

IEC 60255-5 Insulation at 500 V > 100 Mohm > 100 Mohm

Fiel

d St

anda

rds

for

Rel

ays

IEC 60255-21-1 Vibration 10 – 150 Hz 1g 10 – 150 Hz 1g

IEC 60255-22-1 High Frequency Impulse Level 4: 2.5 kV Level 4: 2.5 kV

IEC 60255-22-2 Electrostatic Discharge TBD Level 4: 8 kV/15 kV

IEC 60255-22-3 Radiated Electromagnetic Field Disturbance

Level 3: 10 V/m Level 3: 10 V/m

IEC 60255-22-4 Fast Transient Disturbance TBD Level 4: 4 kV (2 kV coms)

Obs

olet

e IEC 60801-2 Electrostatic Discharge Standard withdrawn Standard withdrawn

IEC 60801-4 Fast Transient Disturbance Standard withdrawn Standard withdrawn

IEC 60801-5 Surge Immunity Standard withdrawn Standard withdrawn



Standard Description D20/D200 with standard D20A, D20S, D20K,

D20C


Supp

lem

enta

ry In

form

atio

n

IEEE C37.1-1994 IEEE Standard Definition, Specification and Analysis of System used for Supervisory Control, Data Acquisition, and Automatic Control

Comply Comply

ISO 9000 Quality Systems – Specification for Design, Manufacture and Installation

Comply Comply

IEC 60297 Dimensions of Mechanical Structures of 19 inch Rack

Comply Comply

DNP 3.0 Communication Protocol Comply Comply

IEC 60870-5 Communication Protocol Comply Comply



B. Supported Host Protocols

The following list is a sampling of the host protocols supported by the D20/D200. GE Grid Solutions is continually adding to this list. Please contact GE Grid Solutions for the latest developments.

ABB® Indactic 33/41 (16-bit) Conitel C3000 Megadata MD3000

ABB® Indactic 35 Datap DCP-1 Modbus® (Serial)

ABB® Systems Control SC1801 DNP 3 (Serial) MPS 9000

ADLP-180 DNP 3 (TCP/IP) Pert 26/31

AMTRAK™ SDLC DNP 3 (UDP/IP) PG&E® (Rev. 11)

Allen-Bradley® ANSI X3.28 ESCA®/WELCO® Rockwell®

ASW Ferranti® Mark IIA SANGAMO®

BBC 7200 Ferranti® TRW 9550 SCADA Consultants (Sensa®)

Boeing™ BETAC/GETAC® 7020 Ferranti® TRW S9000 SES®-91

CDC® 44-500 Type I Ferranti® Vancomm SES®-92

CDC® 44-550 Type II GETAC® 7020 Siemens® Sinaut® 8FW-1024 (DPDM)

Cegelec® HNZ GETAC® 7020 LP Siemens® Sinaut® 8FW-512 (PCM)

Conitel C0300 Georgia Power Company Telegyr® TG809

Conitel C0200 Harris® HR5000 UCA™ 2.0

Conitel 2000 Harris® HR6000/XA-21 Valmet® TEJAS V

Conitel C2020 Harris® Micro II Valmet® TEJAS III

Conitel C2025 IEC® 60870-5-101 Westinghouse® REDAC 70H

Conitel C2100H IEC® 60870-5-104 Westinghouse® WESDAC 4F

Conitel C2100M Landis & Gyr 8979 Westinghouse® WISP+



C. Supported IED Protocols

The ability to acquire data from all substation Intelligent Electronic Devices (IEDs) is essential to any utilities substation automation program. GE Grid Solutions has the largest IED protocol libraries in the industry allowing for fast and efficient integration of the following types of IEDs:

− Protection Relays − Power Meters − Digital Fault Recorders − Power Quality Monitors − Capacitor Bank Controllers − Load Tap Changer (LTC) Controllers − PLC

The following list summarizes the sub-master communication protocols supported by the D20/D200:

• 8979 • ACCUSONIC FLOW METER • Allen Bradley ANSI X3.28 DCA • BECO 2200 • BOEING 3050 • CDC TYPE II • COOPER 2179 • DNP V1.00 (QUANTUM METERS) • DNP V3.00 • DPU • ENVIC DMCP-20A • FLUKE® TEMPERATURE RECORDER • GE® DGP • GEC COURIER PROTOCOL • GEC SCADA PACKET • HARLEY LTC-MAP • HARRIS 6000 • HNZ • IEC® 870-5-101 • IEC 870-5-103 • INCOM • INDACTIC 33 • JEM 2 • LEEDEX DTMF

• LILCO ASCII • MD3000 • MICRO II • MODBUS • POWER MEASUREMENT LIMITED 3710

ACM METER • Procontrol P14 • PROGRAMMABLE SYNCROCHECK

RELAY (PSR) • PSI QUAD 4+ • QUANTUM METERS SCANNER • ROCKWELL • RUGBY CLOCK • SAG® PROTECTIVE DEVICE • SC1801 • SEL GATEWAY • SINAUT 8-FW 512/1024 • SINAUT 8FW-512-PCM • SPA BUS • SUNDAS RMS • SYPROTEC HYDRAN • UCA™ 2.0 • VANCOM

GE Grid Solutions is continually adding to the supported protocol list. Please contact GE Grid Solutions for the latest developments.



D. Power Consumption – D20 Modules

Module Power Consumption (Typical Watts)

D20ME 4.00

D20S 3.00

D20A 7.00

D20K 4.00

D20K O/B Relay 0.288

D20C 5.00

D20C A/I 1.50

D20C I/O 1.50

Rack Modem 1.44

Universal Protocol Converter 0.680

48 V Status Point 0.264



For example, a D20S with 8 points on using 24V wetting has a typical power consumption of:

3.00W + 8(0.132W) = 4.056W

A D20K with 4 relays operating requires:

4.00W + 4(0.288W) = 5.152W



E. D20/D200 Main Processor Compatibility

Compatibility of the different versions of D20/D200 main processors and chassis is summarized in below:

Board Combinations

(All in the same chassis)

D20/D200 Chassis Type

D20 Non-VME (1 Slot Horizontal)

D20 VME (5 Slot Horizontal)

D200 VME (9 Slot Vertical)

D20ME Yes Yes Yes

D20ME, EME N/A Yes Yes

D20ME, GreenSpring N/A Yes Yes

D20ME, MicroMemory N/A Yes Yes

D20ME, GreenSpring, MicroMemory N/A Yes Yes

D20M++ Yes Yes Yes

D20M++, EME N/A Yes Yes

D20M++, GreenSpring N/A Yes Yes

D20M++, MicroMemory N/A Yes Yes

D20M++, GreenSpring, MicroMemory N/A Yes Yes

D20ME, D20M++, EME N/A Yes Yes

D20ME, D20M++, MicroMemory N/A N/A Yes

D20ME, D20M++, GreenSpring, MicroMemory N/A N/A Yes

D20ME, New D.20 Peripherals N/A Yes Yes

D20ME, Old D.20 Peripherals N/A Yes Yes

D20ME II (non-VME version) Yes No No

D20ME II (VME version) No Yes Yes

Note: In the above table, “N/A” means that it is physically not possible to plug the processor card into the chassis. “No” means that, although the card can physically be plugged in to the chassis, but it will not function correctly.

Note: There are some constraints with the above compatibilities. For more detail, refer to the D20/D200 Installation and Operation Guide (Document Number 994-0078).



F. D.20 Link Installation

Guidelines for Installing a D.20 Link Some considerations to note when installing peripherals remotely are as follows:

Transceiver Cable (RS-485) • The maximum distance, for the communication portion (i.e. TX and RX), of the D.20 Link,

from the D20 termination panel to the Termination Resistor, is 1000 ft (300 m).

• Repeater modules may be used to extend the D.20 Link beyond the maximum distance. The DCI can extend this limit by 1000 ft.

• The limit for the power supply portion (+DC & -DC) of the D.20 Link depends on the loading. This, in turn, is determined by the following factors: − Number of peripherals per remote location − Maximum load of each peripheral (see D. Power Consumption – D20 Modules) − IR drop on the cable

• Cable losses for typical RS-485 wire gauges are: − #22 AWG [0.644mm] wire = .016 ohms/ft − #20 AWG [0.812mm] wire = .010 ohms/ft

• Ensure that the lower threshold of 20 V, on each peripheral, is met.

• WESDAC Power Converters, rated at 20 W/125 V in, 24 or 48 V out, may be used for a maximum of two peripheral modules.

• To minimize the IR drop of the cable, a higher supply voltage (i.e. 48 V) for peripherals is recommended. An auxiliary power supply, rated at 100 W/125 V DC in, 48 V DC out, may be used.

Fiber Optic Cable • At the start of the fiber optic cable (D20 end), the following items are required:

− D20 fiber optic transceiver, either a 1:1 (DCI) or a 1:4 (DFS), depending on the number of peripheral locations

− Glass (GFO) or plastic (PFO) fiber optic adaptors, as required

• Remote D20 peripheral I/O modules require 20 to 60 V DC source. A WESDAC Power Converter or Power Supply may be used for 125 V input sites.

• The recommended maximum distance for fiber optic cable is: − Glass: 6500 ft / 2000 m − Plastic: 146 ft / 45 m

Repeater modules may be used to extend beyond this limit.



Calculating the Maximum Distance of a D.20 Link Following are formulae, and an example, for calculating the maximum distance of an RS-485 D.20 Link (+DC & -DC), taking into account the IR drop.

Variables PTotal = Total Power

nx = Number of units of type ‘x’

X = Power Consumption of X module (see D. Power Consumption – D20 Modules), where X = M, S, A, K, R, C, C A/I, C I/O, COM, UPC, SP.

I = Constant Current

Vp = Peripheral Supply Voltage (24, 48, 130 V)

Vd = Voltage drop/foot

Rs = Resistive Cable Loss:(#20 AWG [0.812mm] = 0.010 ohms/ft, #22 AWG [0.644mm] = 0.016 ohms/ft)

Dmax = D.20 Link (+DC & -DC) Maximum Distance

Vt = Voltage Threshold (20 V)

Formulae • PTotal = nAA + nSS + nKK + nCC + nC A/IC A/I + nC I/OC I/O + nCOMCOM + nSPSP + nRR

• I = PTotal / Vp

• Vd = I x Rs

• Dmax = (Vp - Vt) / (2 x Vd) or 1000 feet, whichever is less



Example: Assume you are installing three D20A and two D20S modules on an RS-485 D.20 Link using wire gauge #22 and a peripheral supply of 48 V. Calculate the maximum distance of the D.20 Link as follows:

• PTotal = nAA + nSS

= 3 x A + 2 x S = 3 x 5 W + 2 x 3 W = 21 W

• I = PTotal / Vp

= 21 W / 48 V = 0.44 A

• Vd = I x Rs

= 0.44 A x 0.016 ohms/ft = 0.00704 V/ft

• Dmax = MIN[(Vp - Vt) / (2 x Vd) or 1000 feet]

= MIN[(48 V - 20 V) / (2 x (0.00704 V/ft)) or 1000 feet] = MIN[1989 feet or 1000 feet] =1000 feet

Therefore, the maximum distance that you can operate the D.20 Link would be 1000 feet.

Note: If external digital input contact wetting is supplied by station battery, omit the Power Consumption of each Status Point factor (SP) from the Total Power (PT) equation.



Index

6

68K Monitor ........................................ 81 C

Communication Links ......................... 69 Communications Interface .................. 72 Config Pro .......................................... 80 D

D.20 Cabling ...................................... 74 D.20 Link ............................................ 70 D20 A ................................................. 48

analog input processing .................. 51 specifications .................................. 52

D20 AC ............................................... 62 D20 C ........................................... 44, 59

specifications .................................. 59 D20 EME .................................. 5, 19, 36 D20 HV peripherals .............................. 6 D20 K ................................................. 53

base application .............................. 55 control output configurations ........... 54 specifications .................................. 56

D20 ME ........................................ 18, 30 firmware .......................................... 32

D20 ME II ................................. 4, 18, 30 firmware .......................................... 32

D20 S ................................................. 44 specifications .................................. 47

D20/D200 chassis ............................................ 16 communications .............................. 69 Communications Interface .............. 72 detailed description .............. 1, 8, 25 Ethernet support ....................... 19, 36 firmware .......................................... 22 hardware ........................................... 9 I/O peripherals .......................... 20, 37 main processor ......................... 17, 30 mechanical design .......................... 25 modems .................................... 20, 67 overview ........................................... 8 power requirements ........................ 75 power supplies ................................ 64 RTU Master .................................... 16 splitters ........................................... 73 system architecture ........................... 9

Data Display Panel ............................. 79 E

Ethernet support ........................... 19, 36 F

Fiber Optic Interfaces ......................... 79 Frequently Asked Questions .............. 85 H

Host Protocols supported ........................................ 90



I I/O Peripherals

common code ................................. 41 hardware ......................................... 40

IED supported protocols ........................ 91

Interposing Relays.............................. 57 IRIG B ................................................ 34 M

Modems ............................................. 67 specifications .................................. 68

P

Power calculations ............................. 95 Power Supplies ........................ 6, 19, 64 PROMAINT ........................................ 81

R

RS-485 support ..................... 69, 74, 94 S

Software application ............................. 1, 8, 82 maintenance utilities ...... 1, 8, 22, 80

Splitters .............................................. 73 Standards

supported ........................................ 87 T

Time Synchronization ......................... 34 U

Universal Protocol Converter ............. 78 W

WESMAINT ........................................ 80 What's New .......................................... 4

MODIFICATION RECORD

Version Revision Date Change Description

1.00 1 Jan. 13, 2004 Created.

3.00 1 Jan. 22, 2005 Document brought up to date and rewritten.

2 Dec. 3, 2007 Changed “kbps” to “bps” in WESDAC 202/V.23 Modem Specifications tables - p.64, 65 [CC#20071129-0261]

3 Feb. 12, 2009 Added note regarding RS-485 transient suppression, clarified capacity of D.20 channels.

Mar. 2, 2009 Added specifications for storage conditions in section 2.1.5 .

4 Jun. 18, 2009 Updated maximum number of processor boards for VME chassis D20 units.

5 Jul 21, 2011 Updated Technical Support and Customer Service contact information.

6 Oct 7, 2013 Correction made; The D20 can support up to 21 RS-232 or RS-485 ports (7 per processor board).

7 Oct 15, 2013 Correction made to Table 2: Maximum Serial Ports

8 Aug 20, 2015 Updated Appendix A: Specifications and Supported Standards Corrected Resolution specification for D20A and D20C modules

9 Feb 7, 2017 Updated contact information and branding. Replaced ConfigPro references with SGConfig references.

10 Feb 10, 2017 Removed reference to SNMP server in Section 2.2.4 Time Synchronization.

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