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By Nigel Zeinert

IED Communications Over LAN/WAN

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Serial Tunnel

The Principles:•Reroute your COM port over a network•Communicate with the serial device as if it was connected locally•The COM port data is encapsulated in the network protocol•Protocol ensures transparent data communication

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Corp LANCorp LAN

INTERNETINTERNET

Serial ServerSerial Server

SEL321SEL321 LFZPLFZP

7SD5117SD511

Switch / FirewallSwitch / Firewall

CITRIX / CITRIX / VM Ware VM Ware

ServerServerEthernetEthernet

REL511REL511

RS232RS232

RS485RS485

FIBREFIBRE

ZC22ZC22

FibreFibre

Fibre SwitchFibre Switch

FibreFibre

L90L90

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Redirecting Software

•The COM port is redirected via a software driver•All windows based software can be redirected without the application knowing•Most DOS applications can be redirected •DOS redirection software is available that should redirect all DOS app’s (not tested)•Redirection is transparent to the application•Host = The Serial Server Location•TCPPort =

–Port type = 30xx serial port–Port number = xx18

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Serial Devices (IED’s)

•PROTECTION RELAYS•RTU•PLC•ENERGY METERING•EVENT RECORDERS•DATA LOGGER•SECURITY SYSTEM•ANY DEVICE with a SERIAL INTERFACE

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TYPES of SERIAL PORTS

•RS232•RS423•RS422•RS485•Fibre•Copper

•The Serial Server allows concurrent communication to all ports•Ports can be configured

–Printer port–Terminal Server–Serial port–Modem port

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Making a Connection

Before you start the IED software, set the redirector to the desired IED locationStart the application and connect to IEDThe software thinks its communicating directly with the IED, as if the relay was connected directly to the PC

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DatabaseIED

•Type•Function•Location

Application notes

IED notes

Specific notes for the schemes

History of connections

User management

Security

IED Connection Management

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User Interface

The Interface must be:•Easy to use•Fast•Intuitive•Contains useful information•Help user perform their function•User editable

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Software

•Open-source standards•Reuse existing applications

–LINUX–MYSQL–APACHE–PHP–MEDIAWIKI

•Software Developerwww.iedcomms.hsd.com.au

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IED Details

IED’s have special instructionsIED’s in different schemes have different special instructionsLaunch IED application

Without any specific arguments

With specific arguments

Choice of which applicationNetwork IEDSerial IED

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Demo

Questions?

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Specifications

SINGLE SINGLE

1 DRIVER 1 DRIVER

SPECIFICATIONS RS232 RS423

Mode of Operation-ENDED -ENDED

Total Number of Drivers and Receivers on One Line1 RECVR 10 RECVR

Maximum Cable Length 50 FT. / 15.24 m 4000 FT. / 1219.2 m

Maximum Data Rate 20kb/s 100kb/s

Maximum Driver Output Voltage +/-25V +/-6V

Driver Output Signal Level (Loaded Min.) Loaded +/-5V to +/-15V +/-3.6V

Driver Output Signal Level (Unloaded Max) Unloaded +/-25V +/-6V

Driver Load Impedance (Ohms) 3k to 7k >=450

Max. Driver Current in High Z State Power On N/A N/A

Max. Driver Current in High Z State Power Off +/-6mA @ +/-2v +/-100uA

Slew Rate (Max.) 30V/uS Adjustable

Receiver Input Voltage Range +/-15V +/-12V

Receiver Input Sensitivity +/-3V +/-200mV

Receiver Input Resistance (Ohms) 3k to 7k 4k min.