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Installation Guide

Door Processor Unit 7920

DPU 7920

for I/NET® Building Automation Systems

®

vi

TCON117.—.06/00

We at Control Systems International (CSI) have tried to make the information contained in this manual as accurate and reliable as possible. Nevertheless, CSI disclaims any warranty of any kind, whether express or implied, as to any matter whatsoever relating to this manual, including without limitation the merchantability or fitness for any particular purpose.

CSI will, from time to time, revise the product(s) described in this manual and reserves the right to make such changes without obligation to notify the purchaser. In no event shall CSI be liable for any indirect, special, incidental, or consequential damages arising out of purchase or use of this manual or the information contained herein.

1996, 1999, 2000 by Control Systems International. All rights reserved.

Printed in the United States of America.

Document Number: TCON117–06/00

I/NET, Control Systems International, and the Control Systems International logo are registered trademarks of Control Systems International.

FrameMaker and Minion are trademarks of Adobe Systems Incorporated. Canvas is a trademark of Deneba Software. All other trademarks mentioned belong to their respective owners.

About this manual:

This book was written and produced using FrameMaker workstation publishing software and the Minion font from Adobe. Illustrations were created or modified using Canvas.

Installation Guide

Contents

FCC Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

DPU-7920 Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

DPU- 7920 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2DPU-7921 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2DPU-7922 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2DPU-7923 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Intrusion Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Battery Backup Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Installing the Field Input Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Connecting the Sense and Release Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Installing Supervised Field Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Connecting the Door Reader Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Installing the Field Output Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Connecting the Door Strike and Contact Shunt Output Switches . . . . . . . . . . . . . . . . . . . 8

Mechanical Door Interlock Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Connecting to the DP LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Connecting the Tamper Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Connecting Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Connecting the Optional Battery Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Starting Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Grounding Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Earth Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Baseplate Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14LAN Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Setup and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Addressing the DPU-7920 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Reader Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

CSI Key/Card Reader Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

DPU 7920 iii

Installation Guide

I/DISC Reader Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20I/DISC with PIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Wiegand Reader Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Watermark Reader Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22ABA Standard (Track 2) Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Reader LED Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Two-color LED Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Three-color LED Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Universal Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Addressing the Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Supervised Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Tamper Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Battery Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Selecting Input Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Discrete Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260–5 Volt Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260–10 Volt Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260–20 and 4–20 Milliampere Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Output Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Output Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Output LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Startup Sequence Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Cold Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Warm Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Setting the Communications Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Monitoring for Primary Power Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

LED Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

DPU-7920 Stand-alone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

DIP Switch and Point Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

DIP Switch S1 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Pinout Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32DPU-7920Supervised or Non-Supervised Without Door Assignment . . . . . . . . . . . . . . . . . . . . . . 32

iv DPU 7920

Installation Guide

Supervised or Non-Supervised With Door Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

DPU 7920 v

Installation Guide

FCC Warning

The Federal Communications Commission (FCC) requirements prescribe certification of personal computers and any intercon-nected peripherals in the FCC rules and regulations.

This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: this device may not cause harmful interference, and this device must accept any interference received, including interference that may cause undes-ired operation.

This equipment generates and uses radio frequency (rf) energy for its operation and, if not installed and used in accordance with the installation and operation manual, may cause interference to radio and television reception. It has been found to comply with the limits for a Class A computing device pursuant to the aforementioned regulations. These are designed to provide reasonable protection against such interference when operated in a residential area. Only peripherals (computer input/output devices) certified to comply with the Class A limits may be connected to this device. Operation with noncertified computer peripherals is likely to result in interference with radio and television reception. If this equipment does cause interference to radio or television reception, the user is encouraged to correct the situation by one or more of the following measures.

Relocate the receiver with respect to the computer.

Move the computer away from the receiver.

Plug the equipment into a different outlet, so that the computing device and receiver are on different branch circuits.

Disconnect and remove any unused cables that may be acting as a transmission source.

Make certain that the computing device is plugged into a grounded outlet receptacle.

If necessary, contact CSI for additional suggestions.

vi DPU 7920

Installation Guide Overview

35

Overview

The Door Processor Unit 7920 (DPU-7920) functions as either a stand-alone device, or as part of a larger local area network (LAN) host system. It controls up to two doors with entry reader inputs, or one door with entry and exit reader inputs, eight universal inputs, and eight relay contact outputs. By processing input data with programmed informa-tion, the DPU controls access into, and exit from an area. It can monitor the status of the lock and door, routing status information to selected CRT displays and printers, and generate fault messages according to its programming.

Warning: One of the relay contact outputs for each door is a door strike switch that is intended to provide a failsafe for the software logic. These outputs are not intended to replace a mechanical door interlock for egress. Use of this output in a mechanical door interlock must conform to local fire, life and safety code wiring and installation requirements. Refer to “Mechanical Door Interlock Wiring” on page 9.

The DPU-7920 supports a total of 48,000 users. When the DPU is loaded with firmware version 2.1x or earlier, you can assign up to 24,000 users to each of the two doors controlled by the DPU. When the DPU is loaded with firmware version 2.2x or later, you can assign more than 24,000 users (up to 48,000) to a single door as long as the combined number of users for both doors does not exceed the 48,000-user DPU limit. Since each tenant within I/NET can have up to 24,000 users, you must define at least two tenants in order to assign more than 24,000 users to a single DPU door.

DIP switch settings on the interface board control the DPU-7920 address and configu-ration. Use these settings to establish the DPU-7920’s LAN address. DIP switch settings also define the optional cold start mode for the DPU.

The DPU-7920 can recognize CSI’s access control readers, including the I/DISC reader, I/DISC with ESSEX PIN pad, Watermark readers, Wiegand (26-/32-/66-bit) readers, ABA Mag-Stripe readers and Mag-Tek readers. You can configure the DPU to use any of the readers through the I/NET Door Extension editor and, if using low-level drive current readers, by changing resistors on the DPU. You can also select the anti-passback, first key auto-unlock, and 24-hour access options for each door using the Door Exten-sion editor on the I/NET host.

The DPU-7920 contains 128 KB of battery-backed RAM, and 64 KB of EPROM. An on-board Ni-Cad battery, which is separate from the optional standby battery, maintains the database contents in RAM during a power loss. This power backup of the database allows the DPU-7920 to resume controlled access operation when power is restored. The DPU also provides event buffering and stores activity messages, which the on-board battery also backs up.

An optional standby 12 VDC, 4 ampere-hour battery provides power to the DPU-7920 for full operation during a power loss. Controlled access continues for the duration of the standby battery life, until normal power is restored. The backup battery system provides up to eight hours of operation during power failures.

DPU 7920 1

Overview Installation Guide

An optional 12 VDC, 4 ampere-hour battery can be mounted in the enclosure to provide battery backup for the door strike outputs when primary power is lost. This backup battery is in addition to, and separate from, the standby battery that powers the DPU-7920 controller card during power loss.

The DPU-7920 communicates with input and output points through shielded twisted-pair cable. The operating distance between the DPU-7920 and the points controlled is a maximum of 300 feet (90 m), on an input or output line. Communications to the I/NET host is through the RS485 port using shielded twisted pair cable.

Note: Failure to install the system in accordance with the UL requirements is a violation of the UL Listing mark.

DPU-7920 Configurations

There are four basic configurations for the DPU-7920. The first configuration is the controller card mounted on a baseplate, the second through fourth configurations add an enclosure, power supply and an option for 120 or 240 VAC. Figure 1 shows the DPU-7920 controller card.

DPU- 7920The DPU-7920 controller card mounts on a baseplate and is suitable for installa-tion/mounting in a customer-provided UL Listed access control unit enclosure. This model comes only with the electronics board. The customer must provide a suitable enclosure and 24 VAC power supply. The baseplate assembly is 9.6 × 10 inches (24.13 × 25.4 cm).

DPU-7921This UL Listed model includes the DPU controller card, a Nema 1 style indoor metal enclosure, plug-in transformer, and other accessories in an un-assembled kit. The enclo-sure’s dimensions are 14.25" wide × 14.25" high × 3.5" deep (36.2 × 36.2 × 8.9 cm). The enclosure has conduit knockouts on all four sides.

DPU-7922This UL Listed model provides the DPU controller card mounted in an indoor metal enclosure. It also has a power transformer that will accept 120 VAC power input.

DPU-7923This model is the same as the DPU-7922, except it has a power transformer that accepts 250 VAC power input.

Intrusion KitThis separate option kit (required in UL Listed systems) provides an intrusion (tamper) switch that signals the host whenever the enclosure lid is opened. This kit contains mounting hardware and the switch (part number KITSW). This option is not factory installed and is shipped in kit form only.

2 DPU 7920

Installation Guide Overview

Battery Backup KitThis separate option kit (required in UL Listed systems) provides a four ampere-hour battery backup with mounting brackets. The battery supply maintains the operation of the controller and up to two key/cards or I/DISC readers for approximately eight hours. Order model number KITBAT. To order only the battery brackets, order model number KITBB. This option is not factory installed and is shipped in kit form only.

Note: Battery backup power supply is provided to the controller card only. An optional, separate battery backup for the door strike signal is also available. You can order a dual battery backup kit (CSI part number 330281-08) and dual battery bracket kit (CSI part number 330281-10) from CSI.

Figure 1. DPU-7920 Controller Card

+

TB1

TB2

TB3

TB4

TB5

TB6

TB8

TB9D8

D7

D6

D5

D4

D3

D2

D1

C1

C2

C3

C4

D1

D2

D3

D4

STATUS

8.00 "

9.31 "

8.64 "

8.11 "

7.00 "

7.00 "

S2

D11 D10 D9

RX TX

S1 OFF 1 2 3 4 5 6 7 8 9 10 1112

9.60"

9.00"

10.0"

EPROM

C5

C6

C7

C8

D5

D6

D7

D8

A1

A2

A3

A4

B1

B2

B3

B4

A5

A6

A7

A8

B5

B6

B7

B8

12345678

RS5

DPU 7920 3

Overview Installation Guide

Related Manuals

The following manuals provide information related to the use and operation of the DPU-7920:

TCON109, 7790 LAN Interface Unit Installation Guide

TCON112, CSI Readers Installation Guide

I/NET 2000 System Operator Guide

I/NET 2000 System Technical Reference Guide

4 DPU 7920

Installation Guide Installation Procedures

Installation Procedures

Note: Operational errors may occur if equipment is inadequately grounded. Symptoms may include, but are not limited to: intermittent LAN or sub-LAN communications, or improper control actions. Refer to “Grounding Requirements” on page 14 during equip-ment installation.

The DPU-7920 must be placed in an acceptable environment for the electronics (refer to “Specifications” on page 34), and within its normal operating distances. Consult a floor plan of the facility to find a protected, secure location for the enclosure, and trace the wiring track to the reader and other sensor locations. When you have positioned these elements to your satisfaction, go ahead with the physical, electrical, and electronic instal-lation.

Installing the Field Input Cables

Each door can have an entry key/card reader or, door 1 can have an entry and exit key/card reader. Each door can also have a sense switch and an optional door release switch. The Sense and Release contacts connect to the terminals of TB1, using the first four inputs. Refer to Table 1 for input assignments.

Warning: Failure to disconnect power from all interconnected equipment before performing electrical installation may result in ELECTRICAL SHOCK and/or SEVERE BURNS.

Note: In UL Listed systems, the release switch wiring must be within the restricted area protected by the access control system.

Connecting the Sense and Release SwitchesConnect the sense switches as shown in Figure 2. The procedure is detailed below.

1. Connect one wire to the release input, TB1-1 (see Figure 2).

2. Connect the other wire to the release common, TB1-2.

Table 1. Sense and Release Signal Connections

Terminal Post Number

Function

TB1-1 Door 1 Sense Switch Input

TB1-2 Door 1 Sense Switch Common

TB1-3 Door 1 Release Switch Input (See UL note below)

TB1-4 Door 1 Release Switch Common (See UL note below)

TB1-5 Door 2 Sense Switch Input

TB1-6 Door 2 Sense Switch Common

TB1-7 Door 2 Release Switch Input (See UL note below)

TB1-8 Door 2 Release Switch Common (See UL note below)

DPU 7920 5

Installation Procedures Installation Guide

3. Repeat steps 1 and 2 for door 2 using TB1 posts 5 and 6.

Connect the Release switches as shown in the following steps.

Note: The Door Release switches are a software door unlock. These inputs are not intended to replace a mechanical door interlock for egress. Use of this output in a mechanical door interlock must conform to local code wiring and installation requirements. Refer to “Mechanical Door Interlock Wiring” on page 9.

1. Connect one wire to the sense input, TB1-3 (see Figure 2).

2. Connect the other wire to the sense common, TB1-4.

3. Repeat steps 1 and 2 for door 2 using TB1 posts 7 and 8.

Installing Supervised Field InputsConfigure the field inputs for supervision in the Resident I/O editor of the I/NET host. You may supervise a single switch in normally closed or normally open configuration, or you may supervise multiple normally open switches connected in parallel. When config-

Figure 2. Example of Sense Switch Connections

TB1

TB2

12345678

12345678

Door 1 Sense Switch Input

Common

Door 1 Release Switch Input

Common

Door 2 Sense Switch Input

Common

Door 2 Release Switch Input

Common

A1

A2

A3

A4

B1

B2

B3

B4

C1

C2

C3

C4

D1

D2

D3

D4

A5

A6

A7

A8

B5

B6

B7

B8

C5

C6

C7

C8

D5

D6

D7

D8

6 DPU 7920


uring the inputs to supervise the line status, the inputs are normally wired to a single switch in the field. The switch must use double resistor (1K ohm, 1⁄4W, ±1%) termina-tion, and may be normally open or normally closed (see Figure 3).

Multiple switches connected to a supervised input line (see Figure 4) must consist of normally open switches wired in parallel.

Connecting the Door Reader InputsThe reader inputs for the two doors connect through ports TB3 and TB4 on the left side of the controller card. If you are configuring for entry/exit readers for one door, the entry reader input is port TB3 and the exit reader is port TB4 (see Figure 10). Refer to TCON112 CSI Readers Installation Guide for connection information for each of the supported readers. You will need to use the breakout box with the DPU-7920 only if you are connecting CSI key/card readers. All connections for breakout box terminals 1 through 8 equate exactly to terminals 1 through 8 on both TB3 and TB4. See Figure 10 for terminal assignments. Refer to Table 6 on page 19.

Note: UL Listed systems must use the CSI model IDISCRDRB or IDISCRDRMP reader.

Figure 3. Supervised Single Switches

Figure 4. Supervised Multiple Switches

Entire circuit is supervised for line cuts (“open” wire) Entire circuit is supervised for line cuts (“open” wire)

Portion of circuit is supervised forjumpers (“shorts” in wiring)

Normally Open Switch/Contact Normally Closed Switch/Contact

1K 1K1K

1K


Series Resistor

Parallel Resistor

Series Resistor

Parallel Resistor

Note: The components shown inside the dashed boxesshould be in close physical proximity.


Entire circuit is supervised for line cuts (“open” wire)

Series Resistor

Parallel Resistor

Note: The components shown in the dashed boxshould be in close physical proximity.

DPU 7920 7


Installing the Field Output Cables

Each door has a door strike and door shunt signal. The door strike relay output locks the door. The door shunt signal allows you to bypass a door open signal from a third-party alarm system when the door is opened. The strike/shunt relay output terminals, TB8 and TB9, use the terminal posts as shown below.


Note: The maximum door strike contact rating for a UL Listed system is 24 VAC/VDC, 1 ampere.

Connecting the Door Strike and Contact Shunt Output SwitchesConnect the door strike and shunt switches as shown in Figure 5. The procedure is detailed below.

1. Connect the magnetic strike positive lead to the normally-closed (NC) strike contact output, TB8-1.

2. Connect the magnetic strike negative lead to the negative side of the strike power supply.

Note: The system requires an MOV (CSI part number 604790-0004) be installed across the door strike coil.

3. Connect the positive lead from the strike supply to the common (C) contact of the strike output, TB8-2.

4. Connect the two shunt leads across the door open/closed switch by connecting one lead to TB8-8 and the other lead to TB8-9.

Table 2. Strike/Shunt Relay Output Connections

Terminal Post Number Function

TB8-1 Door 1 Strike N.C. Contact (See UL note below)

TB8-2 Door 1 Strike Common (See UL note below)

TB8-3 Door 1 Strike N.O. Contact (See UL note below)

TB8-4 Door 2 Strike N.C.Contact (See UL note below)

TB8-5 Door 2 Strike Common (See UL note below)

TB8-6 Door 2 Strike N.O. Contact (See UL note below)

TB8-7 Door 1 Shunt N.C. Contact

TB8-8 Door 1 Shunt Common

TB8-9 Door 1 Shunt N.O. Contact

TB8-10 Door 2 Shunt N.C. Contact

TB8-11 Door 2 Shunt Common

TB8-12 Door 2 Shunt N.O. Contact

8 DPU 7920


5. Repeat steps 1 through 4 for the second door using terminal posts TB8-4 and TB8-5 for the magnetic door strike and posts TB8-11 and TB8-12 for the shunt leads.

Mechanical Door Interlock Wiring

If you want to use the DPU-7920 door release outputs as a part of your mechanical door interlock, you may use the following wiring application.

Warning: Wire in accordance with national and local fire, life, and safety code requirements.

This wiring application uses a magnetic lock and the DPU-7920 door release inputs to energize a strike relay This relay should be wired in series with a mechanical interlock, for example, a normally closed contact on a DPST release switch or crash bar (see Figure 6). This will provide a logical means as well as a mechanical means to break power to the door lock.

Figure 5. Example of Door Strike and Shunt Connections

+

TB8

TB9D8

D7

D6

D5

D4

D3

D2

D1

121110987654321

121110987654321

CN.C.

Magnetic Strike

N.O.

To Third PartyAlarm System

Panel

Magnetic DoorOpen/Closed Switch

MOVCSI part number

604790-0004

+

Strike PowerSupply (Not Supplied

by CSI)

–

C

DPU 7920 9


Note: It is necessary to provide a mechanical means to break power to the lock, or a mechanical device to release the door, in all access controlled areas for emergency egress. In UL Listed systems, a UL Listed door release must be used to allow exit during unpowered, emergency exit.

Warning: The relay contact outputs for each door is a software door unlock. This is provided for key read entry and auto-unlock. These outputs are not intended to replace a mechanical door interlock for egress. Use of this output in a mechanical door interlock must conform to local code wiring and installation requirements. Refer to the wiring diagram in Figure 6.

1. Connect the strike positive lead to an N.C. strike contact output on TB8 (pin 1 or 4).

2. Connect the strike negative lead to one side of the mechanical interlock.

3. Connect the other side of the mechanical interlock to the negative side of the strike power supply.

4. Connect the positive lead from the strike power supply to a common contact on the strike output on TB8 (pin 2 or 5).

5. Connect one wire from the door interlock switch to the release input, terminal TB1-3 or 7.

6. Connect the other wire from the door interlock switch to the release common, terminal TB1-4 or 8.

Figure 6. Mechanical Door Interlock

+

TB1

TB2

TB8

TB9S2

D11 D10 D9

D8

D7

D6

D5

D4

D3

D2

D1

STATUSRX TX121110

987654321

121110

987654321

12345678

12345678

Strike PowerSupply

(Not Suppliedby CSI)

+

–Magnetic StrikeNormally Closed

Door ReleaseNormally Open

+

–

MOVCSI part number 604790-0004

Release Switch

10 DPU 7920


Connecting to the DP LAN

Connect the DPU-7920 to the DP LAN through an RS485 port (TB5) using shielded twisted pair cable (refer to “Specifications” on page 34). Wire the DPU-7920 parallel with the other DPUs on the DP LAN — all the positive lines connect to the COM+, terminal 1, all the negative lines connect to the COM–, terminal 2.


Note: Stand-alone UL Listed applications do not use LAN connections. LAN connections are not investigated by UL.

1. Connect the negative line to COM–, TB5-2.

2. Connect the positive line to COM+, TB5-1 (see Figure 7).

Caution: Connect the Shield to Earth Ground at only one location.

Connecting the Tamper Switch

Note: In UL Listed systems, the tamper switch must be installed.

This optional switch signals the I/NET system whenever someone opens the DPU-7920 enclosure lid. The tamper switch, along with mounting hardware, can be ordered as a separate kit, part number KITSW. Use the following procedure to install the tamper switch connections on port TB6.

Figure 7. LAN Connection

TB4

J2

TB5

TB61 2 3 1 2 3 4 5 6 7 8

COM + COM -

ShieldEarth Ground atone location only!

DPU 7920 11


1. Using two number 4 hex nuts, mount the tamper switch bracket inside the lip of the enclosure, using the two 4-40 × 3⁄8" studs provided.

2. Using two number 4 hex nuts, mount the magnet to the two studs provided along the edge of the DPU enclosure door.

3. Using two 22 AWG (0.324 mm2) conductors terminated with a pair of 1⁄4" spade lugs, connect the two normally open terminals of the switch to terminals 7 (TMP+) and 8 (TMP–) on TB6, located at the base of the DPU-7920 circuit card (see Figure 8).

Connecting PowerConnect the primary power, 24 VAC, to the power strip terminals. Use the following procedure to install primary power to the DPU-7920 at port TB6.


1. Remove power to the power line at the circuit breaker box.

2. Connect the 24 VAC power input across terminals 1 and 2 of TB6 located along the base of the DPU circuit card (see Figure 9).

3. Connect terminal 3 of TB6 to a good earth ground. The enclosure in which the DPU circuit card is installed should also be well grounded. Connect the ground line to EGND, TB6-3 (see Figure 9).

4. Restore power to the power line at the circuit breaker box.

Note: Do not attempt to use the same AC transformer for any subLAN device (MR, DPU, UC, or Transducer) and its associated LAN interface device (MRI, DPI, MCI, UCI, or I/SITE LAN). This will result in improper operation of one or both of the devices.

Figure 8. Tamper Switch Connections

TB4

J2

TB5

TB61 2 3 1 2 3 4 5 6 7 8

Tamper Sw In

Tamper Sw Gnd

12 DPU 7920


Connecting the Optional Battery Backup

Note: In UL Listed systems, the battery must be installed.

The DPU-7920 has an optional 12 VDC, 4 ampere-hour battery backup to let the unit operate during primary power failure. Use the following procedure to install the backup battery to port TB6.


1. Remove power to the power line at the circuit breaker box.

2. Place the battery in the DPU-7920 cabinet with the terminals to the front of the cabinet.

3. Secure the battery in place using the battery retaining bracket and hardware.

4. Connect the red battery lead from the BAT+, TB6-4, to the battery positive terminal (see Figure 9).

5. Connect the black battery lead from the BAT–, TB6-5, to the battery negative terminal.

6. Restore power to the power line at the circuit breaker box.

Note: When installing the battery option in the DPU enclosure, remove the cover from at least one of the unused knockouts in the enclosure. Do not install the maintenance-free lead-acid battery specified for use with the DPU in a sealed enclosure.

Figure 9. Battery and Power Connections

J2

TB5

TB61 2 3 1 2 3 4 5 6 7 8

–

+4AH 12VBattery

24VAC48VA PowerTransformer

PW

RP

WR

EG

ND

BAT

+B

AT –

TB4

DPU 7920 13


Starting Operation

After installing the DPU-7920 and all associated equipment, initialize the DPU-7920 as follows:

1. Apply operating power to the DPU-7920 and other components. Observe the STATUS LED for indication that the DPU-7920 automatic self-test is successful. This LED remains on after a successful self-test.

2. Clear the DPU-7920 memory by turning DIP switch 8 on, and pressing the reset switch (see Figure 1). Observe the STATUS LED for indication that the DPU-7920 automatic self-test is successful.

3. Turn DIP switch 8 to the OFF position (warm-start).

4. Program the system operating parameters into the DPU-7920 using the I/NET system.

Grounding RequirementsTo ensure proper operation of the controller, it is imperative that the unit be correctly grounded. Depending on the mounting location and mounting method used to install the unit, the controller chassis may not necessarily provide adequate ground for the input power circuit and interconnected sensors/devices: therefore, use the following grounding requirements during unit installation.

Earth Ground

Note: You must establish a proper earth ground connection point prior to connecting ground wires to electrical equipment.

Electrical Service Earth Ground wire must be securely connected to the equipment chassis.

The Electrical Service Earth Ground wire must then be connected to the ground terminal on the controller power input terminal block.

Baseplate Ground

Note: Baseplate grounding requirements apply to all controllers having a baseplate.

Good contact must exist between the baseplate and chassis. Ensure that all mounting screws are tight.

If you suspect that a good ground on the chassis is not present, attach a 12-AWG (3.331 mm2) ground wire from the Electrical Service Earth Ground wire to the baseplate. Attach the ground wire between the PCB and the baseplate, using one of the mounting screws.

If resolving a grounding issue with previously installed equipment, use star-tooth lock washers to ensure a tight connection between the PCB and the baseplate.

14 DPU 7920


LAN Ground

Note: This procedure applies to all LAN and sub-LAN connections.

Ensure that the sub-LAN cable shield drain wire is not connected to the controller sub-LAN terminal block.

Shield drain wire continuity must be maintained as the sub-LAN cable passes through each controller. Shield drain wires from each controller sub-LAN cable must be twisted together, insulated, and tied back such that wires do not come in contact with ground or any conductive surface within a controller.

Connect the shield drain wire directly to Electrical Service Earth Ground at only one end of the cable (e.g., at the MCI, MRI, DPI, or controller).

DPU 7920 15

Setup and Operation Installation Guide

Setup and Operation

The DPU-7920 mounts indoors on a wall surface, in an area that meets this unit’s envi-ronmental specifications (see “Specifications” on page 34). You must first set the DPU address, DP LAN baud rate, and warm/cold start status on the DPU controller card. These DIP switch settings go into effect after you enter them and reset or cycle the DPU power.

The DPU-7920 connects to up to two doors, two reader inputs, eight universal inputs, and eight relay contact outputs. Table 3 defines these inputs and outputs.

The inputs are located as follows: TB1 and TB2 are universal inputs, TB3 and TB4 are reader input. The outputs are located on TB8 and TB9, and provide the lock/strike/bolt and shunt output. TB5 provides the communications port for the DP LAN. Tamper switch, power, and battery power inputs are located on TB6.

Addressing the DPU-7920

Set the LAN address (0–31) using DIP switches S1-1 through S1-5 before you hook up the communication lines. The LAN address takes effect after you enter the information and reset the DPU. The factory-set address for the DPU-7920 is number 1. The switches are binary, and contribute their address value to the other switches when ON. The following table shows these values.

Table 3. DPU-7920 Devices

Equipment Function

Key/Card or I/DISC Reader

Reads a key, card, or other form of identification tag to determine authorization to enter or exit through the door. These tags may use CSI proprietary magnetic stripe keys and cards, industry standard ABA magnetic stripe, proximity, Wiegand, or a multitude of others that provide Wiegand-type output signals.

PIN Pad/Reader

Supports input of a 5-digit personal identification number (PIN) to determine if an individual is authorized to enter or exit through the door. Supported PIN pads/readers include: Motorola/Indala ARK501 proximity/PIN reader, Dorado 780 swipe/PIN reader, Hughes ProxPro proximity/PIN reader, and ESSEX PIN pad with an I/DISC reader.

Door Release Switch

Dry contact inputs (DI) that are normally open or normally closed. When the release button is pressed the door is released.

Door Sense Switch

Dry contact inputs (DI) that are normally open or normally closed. Monitors whether the door is open or closed. It allows the door strike to relock immediately upon door closure.

Door StrikeDry relay contact (DO) outputs that are either normally open, or normally closed. This contact controls the 12–24 VAC/DC voltage to the door strike.

Door ShuntDry relay contact (DO) outputs that are either normally open, or normally closed. It can be used to bypass a door open signal when the DPU-7920 releases the door.

16 DPU 7920

Installation Guide Setup and Operation

For example, when you set only switch S1-1 to ON, the DPU-7920 address value is 1. When you set switches S1-1 and S1-3 to ON, the address value is 5 (1+4 = 5). To set the DPU-7920 to address 31, set switches S1-1 through S1-5 to ON.

Reader Inputs

The DPU-7920 has two eight-terminal plug-on blocks (TB3 and TB4) for reader inputs. You may configure them as entry reader inputs for two doors, or as an entry and exit reader input for one door. The DPU-7920 provides a common interrupt-driven hard-ware interface for several different reader types. You select the reader type by setting the reader type using the I/NET system software.

Note: UL Listed systems must use the CSI model IDISCRDRB or IDISCRDRMP reader.

Currently defined readers include:

CSI Mag-Stripe Key or Card reader

Indala Proximity readers

Wiegand 26-bit reader

Wiegand 32-bit reader

Wiegand 66-bit reader (with or without PIN pad) – requires I/NET 2000 version 2.x or later, and DPU firmware version 2.20 or later.

ABA Mag-Stripe reader

Watermark Magnetics reader

I/DISC reader (5 mA reader, with or without PIN pad)

When selecting the I/DISC or Watermark reader type, you can configure your system to translate key/card numbers greater than 24,000 to values that are within the 1-to-24,000 range required by earlier versions of I/NET. This requires you to enter the starting number, target number, and number of keys/card to be translated in the Key/Card Trans-lation editor within I/NET. If selecting a Mag-Tek MT211/215 or other low-level drive current reader, the DPU resistors in RS5 should also be changed.

Note: The reader type selection must be the same for both ports if configured as entry and exit readers for one door. If the readers are configured as entry readers for two doors, they may be different reader types.

With single LED Wiegand readers, connect the LED wire to Terminal 7. This will allow the LED to follow the state of the strike/shunt outputs of the DPU (i.e., secure/unsecure state of the door).

Table 4. DIP Switch S1 Address Values

Switch 1 2 3 4 5

Value 1 2 4 8 16

DPU 7920 17


The readers connect to the DPU-7920 through the two eight-position plug-on terminal blocks located along the left side of the controller card (see Table 5). Each door may have an entry reader, or a single door may have two readers: both entry and exit. Two readers for a single door makes anti-passback operation possible. Table 5 shows the ports and their functions.

Each terminal block provides connections for up to eight signal conductors from the various reader types. When connecting the DPU to other types of readers, you will need to attach eight conductor cable from the reader to the DPU (see Figure 10).

When using the Mag-Tek (MT211/215) or any other reader with a drive current of less than 5mA, the resistors in RS5 should be change from 1K ohm to 4.7K ohm resistors (see Figure 11).

When using the CSI Mag-Stripe key/card readers and the standard modular reader cables, the connection of a reader must be passed through a CSI breakout box. Discrete conductors connect to the DPU reader port through optional modular cable break-out assemblies. The modular break-out assembly provides an 8-screw terminal board for each required reader port. Each modular break-out unit provides terminal board connection support for two readers, and can be ordered by the kit designation of part number KITRDRCON. The kit provides a dual modular RJ45-to-terminal assembly with adhesive backing suitable for installation in the DPU enclosure.

Table 5. Reader Ports

Port Function

TB3 Entry Door number 1

TB4 Exit Door number 1 or Entry Door number 2

Figure 10. DPU-7920 Reader Input Ports

12345678

TB3+13V Reader PowerAux

DATA/DATA-1+5V Reader Power

CLK/DATA-0LED (Red)

LED (Green)Ground

Reader Input 1

12345678

TB4+13V Reader PowerAux

DATA/DATA-1+5V Reader Power

CLK/DATA-0LED (Red)

LED (Green)Ground

Reader Input 2

18 DPU 7920


The eight signal conductors from ports TB3 and TB4 are presented on the eight screws numbered 1 through 8. The following table defines the function of the signals with the various reader types.

Figure 11. Reader Resistors

Table 6. Reader Signal Breakouts

Terminal Number

Signal Function

1+13 VDC Power

13VDC power supplied to the reader from the DPU. Maximum current drain for each reader should be 50 milliamperes. This conductor typically powers CSI and ABA Mag-Stripe readers.

2 AuxCarries the DATA signal from an I/DISC reader when combined with an ESSEX PIN pad. Otherwise, this terminal is not used.

3

DATA With Mag-Stripe and Watermark readers this conductor carries the DATA signal from the reader.

DATA-1

With Wiegand readers this conductor carries the DATA-1 signal from the reader. The signal, which normally rests at 5 volts, will pulse to 0 volts upon the detection of logic 1 bits in the Wiegand data sequence.

With I/DISC readers, the conductor carries the DATA signal to and from the readers.

4 +5DC Power5 VDC power supplied to the reader from the DPU. Maximum current drain for each reader should be 50 milliamperes. This conductor typically powers Wiegand readers.

5

CLOCK

With the Mag-Stripe, Tracs, and Watermark readers this conductor carries the CLOCK signal from the reader. This signal will normally rest at 5 volts and pulse to 0 volts while the data on conductor number 3 is valid. This signal is called STROBE by some ABA reader manufacturers and CLOCK by others.

DATA-0With Wiegand readers, this conductor carries the DATA-0 signal from the reader. The signal, which normally rests at 5 volts, will pulse to 0 volts upon the detection of logic 0 bits in the Wiegand data sequence.

Mag-Tek or low-level output deviceFor less than 5 mA reader drivecurrent, use 4.7K ohm ¼W, 5%resistors.

I/DISC ReaderFor 5 mA and above reader drivecurrent, use 1K ohm ¼W resistors.

12345678

TB3

TB412345678

RS512345678

DPU 7920 19


CSI Key/Card Reader SupportSelect TRACS from the menu reader type when assigning this type of reader to a controller in I/NET. The DPU-7920 provides a direct interface to the CSI magnetic stripe card and key readers. This reader provides a security advantage over other mag-stripe readers in that the cards and keys cannot be duplicated with standard encoding equip-ment.

I/DISC Reader SupportSelect I/DISC from the menu for reader type when assigning this type of reader to a controller in I/NET. The DPU-7920 supports up to two I/DISC readers. The CSI I/DISC button is a read-only memory device that replaces key/cards for the DPU-7920. This method of identification provides a higher degree of security and reliability than other types of devices. The I/DISC buttons consist of a small, button-shaped device containing a micro-electric circuit that provides the communication interface and unique ID features.

All readers should be installed in a location convenient to the intended point of entry and protected from the weather by a shield or hood when located outside.

Caution: When using the I/DISC reader outside, we recommend that you periodically (every month or two) clean the reader/probe surface area with a metal cleaner/protectant to remove any contaminants or moisture related corrosion. A cleaner/protectant such as WD-40 may be used for this purpose.

I/DISC with PINThe DPU-7920 supports the use of an ESSEX PIN pad in combination with an I/DISC reader. After a valid I/DISC read, the user must enter a valid 5-digit PIN number and press the pound (#) key in order to gain access through the door.

6 Red LED

This signal drives a red LED located in the reader. The actual color of the LED to which it connects is not critical except to note that future references to red LED function/operation in this document refer to the LED connected to this conductor. LED polarity is configurable using the Door Extension editor.The DPU momentarily illuminates the red LED to show when a key/card or I/DISC was successfully read but not authorized to release the door. The red LED will flash for a couple of seconds when the DPU detects a key/card or I/DISC entry, but does not successfully read the data from the reader (i.e., a retry is necessary).

7 Green LED

This signal drives a green LED located in the reader. The actual color of the LED to which it connects is not critical except to note that future references to green LED function/operation in this document refer to the LED connected to this conductor. The LED polarity is configurable using the Door Extension editor.The DPU momentarily illuminates the green LED to show when a key/card or I/DISC was successfully read and accepted by the DPU and authorized to release the door. The green LED control signal also flashes for a couple seconds when the DPU detects a key/card or I/DISC entry but does not successfully read the data from the reader (i.e., a retry is necessary). The double flash function (red and green LED) showing a bad read condition occurs because some readers have only one LED.

8 DC Ground This conductor connects the DC signal ground from the DPU to the reader.

Table 6. Reader Signal Breakouts (Continued)

Terminal Number

Signal Function

20 DPU 7920


The ESSEX PIN pad emits a Wiegand-encoded 26-bit stream. Refer to “Wiegand Reader Support” below for information concerning this reader type. Also, refer to “I/DISC Reader Support” on page 20 for a description of the CSI I/DISC reader.

Wiegand Reader SupportThe DPU-7920 lets you directly connect readers providing a Wiegand interface. The Wiegand data stream formats supported by the DPU-7920 and selectable within the Door Extension editor of I/NET are:

Wiegand 26-bit — The 26-bit Wiegand format is a standard used by many reader/card manufacturers. This bit pattern is called the 2601 format by Sensor Engineering and is available to the user directly from them.

Wiegand 32-bit — Since the CSI 32-bit format is a proprietary format, other 32-bit cards and keys cannot be used with CSI readers using 32-bit Wiegand format, and CSI 32-bit format cards and keys cannot be used in other manufacturer’s readers.

Wiegand 66-bit (requires I/NET 2000 version 2.x and later, and DPU firmware version 2.20 or later) — The CSI 66-bit format is a proprietary format that currently supports the use of the AES Prodata smart card reader.

The group of readers capable of producing these types of output formats include most of the technologies (mag-stripe, proximity, biological, voice, etc.) as well as the Wiegand technology reader from Sensor Engineering. Select either 26-bit, 32-bit, or 66-bit from the menu for reader type when assigning this type of reader to a controller in I/NET.

Data from the Wiegand reader or other device producing Wiegand output, is presented through a two-wire interface plus a ground reference. The two-signal conductors provide Data-0 and Data-1 lines that typically provide a TTL level active low pulse with some devices using an open collector output. A pulse is generated on the respective line (logic-0 or logic-1) for each bit in the 26-/32-/66-bit pattern.

The DPU-7920 accepts a minimum pulse width of 10 microseconds and a minimum time between pulses of 75 microseconds. This complies with the minimums specified by Sensor Engineering. However, other devices that simulate Wiegand output, usually through microprocessor code, must be evaluated for compliance.

One of the interface difficulties associated with the use of the Wiegand cards revolves around the differences in the card encoding styles A and A1 and the associated right-hand and left-hand insertion readers. The standard A1 card used for swipe readers reverses the bit pattern when used in an insertion reader (style A1). This causes the least significant bit (LSB) to be read first instead of the most significant bit (MSB).

Only the MSB-first sequence is supported when using the 66-bit Wiegand data format. When reading 26- or 32-bit Wiegand data format, the DPU-7920 supports either an MSB-first or LSB-first sequence. Inversion of the 0 and 1 bits is also supported with the 26-bit and 32-bit data formats so long as you have not enabled translation tables (i.e., you have not placed DIP switch 7 in the ON position).

The DPU-7920 provides a user-tolerant interface by detecting an inverted bit pattern and automatically adjusting the read process as required to decode the key data correctly. This detection is based on the examination of the 26-bit or 32-bit Wiegand bit pattern and does not require any action on your part.

DPU 7920 21


Watermark Reader SupportThe DPU-7920 supports two Watermark Magnetics card readers made by Thorn Secure Science International, model numbers 1305LO and 1306LO. Data from the reader is presented through a 4-wire interface using power, ground, data, and clock. Select Water-mark from the menu for reader type when assigning this type of reader to a controller in I/NET.

ABA Standard (Track 2) InterfaceThe DPU-7920 can receive standard TTL level Data and Strobe lines from an ABA Mag-Stripe or Mag-Tek, model numbers MT-211 and MT-215 readers. The DPU-7920 uses standardized data recovery and interpretation as defined on the ABA track (Track 2 - center track) of a magnetic stripe card. The ANSI/ISO standard (ANSI x4.16-1983/ISO 3554) defines this format.

Compatibility with standard ABA encoded cards facilitates the use of many off-the-shelf, low-cost, mag-stripe readers and cards. The data is encoded on the mag-stripe as a sequence of 5-bit hexadecimal digits (4 bits plus odd parity on each digit). The ABA format is described in ANSI x4.16. Select ABA_115 for 16-digit format or ABA_85 for 12-digit format. Both allow an unlimited number of trailing digits. Select the reader type from the Door Extension editor in I/NET.

Reader LED OperationThe DPU-7920 provides two LED control outputs for each of the two readers as defined above. These control outputs operate with the discrete LEDs provided by many readers.

Two-color LED Operation

For dual-color operation, the DPU requires a discrete control wire connection to each of the two colored LEDs. In addition, the LED DPU control signal uses positive logic: 0 volts = OFF and 5 volts = ON with CSI key/card and ABA readers. Wiegand readers use negative logic for the LED DPU control signal: 0 volts = ON, 5 volts = OFF. The Wiegand readers typically present the cathode of the LED for control while CSI and many others present the anode. Using the Door Extension editor in the I/NET system, select common anode for Wiegand, and common cathode for most other readers.

The LEDs may be a color other than red or green depending upon the reader used, but the output for these LEDs is still referred to as red or green LED output.

The red and green LED output indicates two conditions. The red LED output is placed in the ON state for one second to show an unauthorized key/card or I/DISC entry. The red LED output flashes five times in one second to indicate that a key/card or I/DISC was detected but not read successfully.

With all readers, the green LED output is used to show the state of the strike/shunt outputs from the DPU; i.e., the secure/non-secure state of the door. The green LED output is in the ON state continuously while the strike is de-energized; i.e., door is open.

A bad read causes both the red and green LED output to flash for one second. This double-LED indication of bad read conditions is provided since many of the readers provide only one DPU-controlled LED. This guarantees that a user always gets visual feedback if they need to reenter the key/card or I/DISC.

22 DPU 7920


Three-color LED Operation

The Dorado 780 swipe/PIN reader makes use of three LEDs as follows:

Red – This LED is labeled “Swipe Card.”

Yellow – This LED is labeled “Enter PIN.”

Green – This LED is labeled “Open Door.”

Control for the three LEDs is provided through two lines labeled “Control A” and “Control B.” The operation of the LEDs is shown in Table 8. The unique algorithm used to control the three LEDs is activated by a DIP switch setting on the DPU. For Door 1, set DIP switch S1-11 to ON. For Door 2, set DIP switch S1-12 to ON.

You can set the LED Polarity for each door to either “Anode” or “Cathode.” Depending on the selected setting, the DPU will operate as follows:

Cathode – This setting causes the DPU to provide three-color LED control to both the entry reader and exit reader. Use this setting if both readers are Dorado 780 swipe/PIN readers.

Anode – This setting causes the DPU to provide three-color LED control to the entry reader and two-color LED control to the exit reader. Use this setting when only the entry reader is a Dorado 780 swipe/PIN reader.

Table 7. Two-color LED Output

State Red LED Green LED

Normal State Off Off

Bad Key Read Blink Blink

Rejected Key On (1 second) Off

Good Key Off On

Open Door Off On

Table 8. Three-color LED Output

LED ControlTypical Function

Reader LEDs

Control A Control B Red Yellow Green

Lo Lo Locked (Disabled) Off Off Off

High HighNormal State, Waiting for Card Swipe

On Off Off

High Lo Waiting for PIN Off On Off

Lo HighValid PIN, Door Unlocked

Off Off On

– – Bad Read Flashing Off Off

DPU 7920 23


Universal Inputs

There are eight input points on two 8-point removable terminal blocks. If no door assignment is made to the DPU, you may assign the inputs as supervised or non-super-vised DI or DA points, or analog AI points (0–5 VDC, 0–10 VDC, or 0–20 mA). The points are designated through the I/NET software. The inputs are located on the top left side of the DPU-7920 at TB1 and TB2 (see Figure 12).

Addressing the InputsThe inputs for the 7920 can be configured as detailed in Table 9 and Table 10. Any of the input points (DA or DI) can be supervised.

Figure 12. Universal Inputs Ports

Table 9. Addressing Inputs without Door Assignments

Input Number Terminal Address Function

1 TB1-1 LLSSPP00 External Universal Input

2 TB1-.3 LLSSPP01 External Universal Input







9 TB6-7 LLSSPP08 Tamper Status

10 TB6-4 LLSSPP09 Battery Status

12345678

TB1

TB212345678

Input 1

Input 2

Input 3

Input 4

Input 5

Input 6

Input 7

Input 8

A1A2A3A4B1B2B3B4

C1C2C3C4D1D2D3D4

A5A6A7A8B5B6B7B8

C5C6C7C8D5D6D7D8

24 DPU 7920


Supervised StatusThe discrete inputs may be designated as supervised or non-supervised. To configure the input, modify the supervised parameter in the Resident I/O editor of the DPI/MCI in I/NET. If using I/NET version 3.10 through I/NET version 4.21, DIP switch S1-7 on the DPU is not used and must be in the “off” position.

Tamper InputTB6-7 and TB6-8 are dedicated enclosure tamper switch inputs. The optional tamper switch allows the DPU-7920 to alert the I/NET system whenever the enclosure door is opened. The tamper input address is LLSSPP08, and is a DA or DI point.

Battery InputTB6-1 is a dedicated battery status inputs. The optional battery monitor allows the DPU-7920 to alert the I/NET system whenever the primary power is lost. The battery status input address is LLSSPP09, and is a DA or DI point.

Selecting Input TypeThe eight inputs making up TB1 and TB2 are shipped configured as contact sensing of discrete inputs. The inputs may be individually configured for alternate input types by removing factory resistors and/or placing different resistors in the appropriate plug-in positions for each input. Plug-in positions labeled A1 through A4, B1 through B4, C1 through C4 and D1 through D4 correspond to inputs 1 through 4 on TB1. Plug-in posi-tions labeled A5 through A8, B5 through B8, C5 through C8, and D5 through D8 affect inputs 5 though 8 on TB2 (see Figure 12 and Figure 13).

The A positions provide a pull-down to DC ground on the input signal for analog input current sensing. The B positions provide a pull-up on the input to 5 volts DC for excita-tion of discrete contact inputs. The C position provides a voltage divide by two when a 100K ohm, 1% resistor is installed. This changes the input from 0–5 V span to a 0–10 V span. Based on the desired function of the universal input, install the specified resistor, or jumper, in the appropriate plug-in position for the corresponding input (see Figure 13).

Table 10. Addressing Inputs with Door Assignment

Input Number

Terminal AddressDoor

NumberFunction

1 TB1-1 LLSSPP00 1 Sense Switch Status

2 TB1-.3 LLSSPP01 1 Exit Push-button Status

3 TB1-5 LLSSPP02 2 Sense Switch Status

4 TB1-7 LLSSPP03 2 Exit Push-button Status





9 TB6-7 LLSSPP08 Tamper Status

10 TB6-4 LLSSPP09 Battery Status

DPU 7920 25


Discrete Inputs

The excitation current for the field contact is achieved by using a 1K ohm, 1%, 1⁄8W resistor in the B position for the corresponding input (refer to Table 11). A closed contact equals Logical 1, or the second state description of a pair. This is the default configura-tion.

0–5 Volt Inputs

To configure an input for a 0–5 V analog signal, you must remove all plug-in resistors in the A, B, and C positions corresponding to that input.

0–10 Volt Inputs

A 0–10V analog input requires a 100K ohm, 1%, 1⁄8W resistor positioned in the corre-sponding C position for the input (refer to Table 11).

Note: Both 0–5V and 0–10V input configurations use a common ground from the sensor that is represented to the DPU on the even number terminals of TB1/TB2.

Figure 13. Resistor Installation

A1

A2

A3

A4

B1

B2

B3

B4

1KΩ W

CSI Part number 800475-12

1 4⁄

249Ω W


1 4⁄

100KΩ W


1 4⁄C1

C2

C3

C4

D1

D2

D3

D4

C5

C6

C7

C8

D5

D6

D7

D8

A5

A6

A7

A8

B5

B6

B7

B8

1K pull-up for DI on Input 1

0–20 mA current sensor resistor for Input 5

0–10V (divide by 2) for Input 2

0 ohm jumpers for all applications

26 DPU 7920


0–20 and 4–20 Milliampere Inputs

If you are using 0–20 or 4–20 milliampere transmitters, the inputs may be changed by inserting a 249 ohm, 0.1%, 1⁄8W current sensing resistor positioned in the appropriate plug-in A position for each input (refer to Table 11). Remove all resistors in the corre-sponding B and C plug-in positions.

Outputs

The DPU-7920 has eight relay (Form C contact) DO outputs on two 12-point removable terminal blocks (TB8 and TB9). Located on the right-hand side of the DPU-7920, these outputs provide connections for both lock/strike/bolt output, and the shunt output (see Figure 14).

Table 11. Universal Input Plug-in Resistor Selection

Input Plug-in Position A Plug-in Position B Plug-in Position C Plug-in Position D

DI 1K ohm, 1%, 1⁄8W Jumper

0–5V Jumper

0–10V 100K ohm, 1%, 1⁄8W Jumper

0–20 mA 249 ohm, 0.1%, 1/8W Jumper

Figure 14. Output Ports

+

TB8

TB9D8

D7

D6

D5

D4

D3

D2

D1

121110987654321

121110987654321

N.O.CN.C.N.O.CN.C.N.O.CN.C.N.O.CN.C.

N.O.CN.C.N.O.CN.C.N.O.CN.C.N.O.CN.C.

1

2

3

4

5

6

7

8 07

06

05

04

03

02

01

00

OutputNumber Address

DPU 7920 27


Output TypesEach output consists of a Normally Open, a Common, and a Normally Closed terminal. Each relay is a DO output. If output 1 or 2 is assigned to a door, the Form C contact will drive the lock/strike/bolt output. Door assignment is done through the I/NET point editor by declaring the point internal, three-state, and assigning a door extension to the point.

Third-party alarm system shunting of an alarm signal is done using the I/NET Door Extension editor. For example, you may want to bypass (shunt) the door open signal when a door connected to output 1 is opened through a valid read by directing the signal from output 1of the DPU to output 3. Refer to “Connecting the Door Strike and Contact Shunt Output Switches” on page 8.

For details in using the Door Extension editor, refer to TCON094, I/NET 7700 Operator Guide.

When the first two points are not assigned to doors, the points are designated as external and behave as I/NET DO points. These points may not be pulse-width-modulated (PWM) analog outputs.

Output AddressesThe eight output points are addressed as DO points 00 through 07. The same address convention is used for output points as for input points. Table 12 shows the output point addresses.

Output LEDsEach output point has an LED located by the relay for that point. As the relay is energized the LED illuminates red. See Figure 1 for location.

Startup Sequence Conditions

The DPU-7920 can execute either a cold start or a warm start depending on the DIP switch S1-8 setting. The normal configuration and factory default is cold start (DIP switch S1-8 ON). The term warm or cold start refers to the microprocessor startup sequences initiated when you press the red reset button, or when power is cycled to the

Table 12. Output Point Addresses

Terminal Block Output Number Point Address Function

TB8 Pins 1–3 1 00 Door 1 Strike

TB8 Pins 4–6 2 01 Door 2 Strike

TB8 Pins 7–9 3 02 Door 1 Shunt

TB8 Pins 10–12 4 03 Door 2 Shunt

TB9 Pins 1–3 5 04 Not designated




28 DPU 7920


controller, without full standby battery backup. Losing primary AC power to a battery-backed DPU won’t cause a warm or cold start because the DPU continues to operate through a power outage for up to eight hours.

Cold StartA cold start sequence clears all memory including any event history collection and data-base programming, reads and interprets all switch settings, sets the date and time to zero, then secures or locks all doors. You can execute a cold start when the DPU is reset (red reset button is pressed or power is cycled) and switch S1-8 is in the ON position, or the program detects a memory loss because the power was off for more than eight hours.

Note: In order for the host to detect a “Memory Lost" message from the DPU, the 8th mask of group 1 in the Host Configuration Editor and DPI must be turned to the “ON” or “CLOSED” position. Failure to set it will result in no automatic downloading to the DPU.

Note: It is recommended that switch 8 be in the “OFF” or “OPEN” position after the startup and initialization are complete.

Warm StartA warm start sequence causes the DPU to read and interpret all switch settings, sets the clock to 00:00 (midnight) and date to 00/00/00. This condition persists until the I/NET host computer broadcasts the correct time to the DPU. The time broadcasts usually happens once each minute.

The DPU performs a warm start when the unit is reset or power is cycled to a non-battery backed unit, switch S1-8 (cold start switch) is OFF, and the program detects no memory loss.

Communications

The DPU-7920 provides one connection for the DPI DP LAN. The DP LAN connects through an RS485 serial communications interface at 9,600 baud. It has a maximum distance of 5,000 feet (1,500 m) through shielded twisted pair cable.

Setting the Communications Baud RateThe DP LAN baud rate is set using DIP Switch S1-6 set to OFF. The default setting for the DP LAN is 9,600 baud.

Note: The current version uses only 9,600 baud on the DP LAN.

Monitoring for Primary Power Loss

You may monitor the 7920 for primary power loss while using the optional battery backup. Use the editors in the I/NET 7700 system to program the 7920 using the following parameters.

DPU 7920 29


For the station address of the 7920, use bit offset 09 as an external DA point. Define state description for this controller to include normal state (PWR) = 0, and loss of primary power (BAT) = 1. Whenever the primary power goes off, this point will go into the alarm state.

Note: This function does not work if you do not use the backup battery option.

LED StatusThe DPU-7920 has three status LEDs on the interface board as shown in Figure 1. The first LED (TX) is red and flashes when transmitting data. The second LED (RX) is green and flashes when receiving data. These LEDs should be flashing when connected to an active I/NET system. If the green LED does not light up, there may be a line/cable problem. A constant illumination of the green LED indicates a possible polarity problem on the cable, or a fault in the host computer.

The third LED (STATUS) is red and is normally “on” when there is power and the DPU-7920 is operating correctly. If the unit is running on full standby battery backup power, it flashes “on” and “off” at a 1-second interval.

DPU-7920 Stand-alone

The DPU-7920 can operate in a stand-alone mode if communications with the host are severed. The DPU-7920 retains its programming and can process access requests from the door readers. It continues to store event messages until the communication is restored to the host. When the DPU is loaded with firmware versions prior to 2.20, it provides a fixed allocation of memory for storing up to 100 messages. When the DPU is loaded with firmware version 2.20 or later, it provides dynamically allocated storage for up to 5,000 messages (approximately). If the stored messages exceed the allocated memory buffer, the most recent messages are saved and the oldest are discarded.

When the DPU-7920 loses communications with the I/NET host, it retains the program-ming it had at the time of the loss. Any anti-passback designated doors controlled by the DPU-7920 continue to function as programmed. The Manual Unlock function is disabled until communications are reestablished with the host.

If a power loss accompanies the communications loss, with the DPU-7920 configured to Cold Start, all DPU programing will be cleared, the clock resets to midnight, and the date resets to zero. Because the DPU programming has been cleared, all access through the associated doors will be denied. Once the DPI re-establishes communications with the DPU-7920, the host will download the DPU and normal operation will resume, if group 1/mask 8 has been set in the host.

If a power loss accompanies the communications loss, with the DPU-7920 configured to Warm Start, the clock resets to midnight, and date resets to zero. Because the DPU is not receiving time and date broadcasts from the DPI, only those personnel with 7-day 24-hour access can open the affected doors. Once the DPI re-establishes communica-tions with the DPU-7920 (within approximately one minute), the time and date at the DPU will be corrected and normal operation of the DPU will resume.

30 DPU 7920

Installation Guide DIP Switch and Point Summary

DIP Switch and Point Summary

Inputs

There are a total of ten inputs point addresses available, addressed as tow consecutive station addresses on the 7920. An additional external point at bit offset 09 allows you to monitor primary power loss with the battery backup option installed.

DIP Switch S1 Settings

Table 13. Address Points

Location Point Type Number of Points Point Address

7920 base board Universal Inputs 8 00-07

External DA Tamper switch 1 08

External DAPower Loss Alarm

1 09

You may define input points as DI or DA points.

LAN Address Baud RateKey/Card

Translation or Not Useda

a. In I/NET versions 4.3x and later, the Key/Card Translation function allows you to use the Key/Card Translation editor to translate ABA-85, ABA-115, Wiegand 26-bit, and Wiegand 32-bit key/card numbers. This option is not available in previous versions of I/NET (i.e., DIP switch S1-7 is not used). All versions of I/NET provide key/card translations for I/DISC and Watermark key/cards (i.e., no switches required).

Warm/Cold Start

LED Control or Not Usedb

b. In I/NET versions 4.3x and later, the LED Control function allows you to enable three-color LED control for use with the Dorado 780 reader. Three-color LED control is not provided in previous versions of I/NET (i.e., DIP switches S1-11 and S1-12 are not used).

Door 1 Door 2

Switch Position

1 2 3 4 5 6 7 8 9 10 11 12

On 1 2 4 8 16Translate

Key/CardsCold Start N/A N/A 3-color 3-color

Off 0 0 0 0 09,600 baud

(off only)None Warm Start N/A N/A 2-color 2-color

DPU 7920 31

Pinout Chart Installation Guide

Pinout Chart

DPU-7920Supervised or Non-Supervised Without Door Assignment

Location: _________________Station Address:____________Point Address: _____________

InputsTerminal

BlockPoint

Types/AddressPoint Description

1 TB1-1 DI, DA, or AI 00








Tamper TB6-7 DI or DA 08 Enclosure Tamper Switch

TB6-4 DI or DA 09 Battery Status

Supervised or Non-Supervised With Door Assignment

InputsTerminal

BlockPoint

Type/AddressPoint Description

1 TB1-1 DI or DA 00 Door 1 Sense Switch Status

2 TB1-3 DI or DA 01 Door 1 Exit Push-button Status

3 TB1-5 DI or DA 02 Door 2 Sense Switch Status

4 TB1-7 DI or DA 03 Door 2 Exit Push-button Status

5 TB2-1 DI or DA 04

6 TB2-3 DI or DA 05

7 TB2-5 DI or DA 06

8 TB2-7 DI or DA 07

Tamper TB6-7 DI or DA 08 Tamper Switch

TB6-4 DI or DA 09 Battery Status

32 DPU 7920

Installation Guide Pinout Chart

Outputs

Output Terminal Block Point Type/Address Point Description

1 TB8 1–3 DO 00

2 TB8 4–6 DO 01

3 TB8 7-9 DO 02

4 TB8 10–12 DO 03

5 TB9 1–3 DO 04

6 TB9 4–6 DO 05

7 TB9 7–9 DO 06

8 TB9 10–12 DO 07

DPU 7920 33

Specifications Installation Guide

Specifications

Memory

64 KB EPROM memory

128 KB RAM, backed by battery backup. This provides dynamically allocated storage for varying combinations of up to 5,000 messages (approximately) and up to 48,000 users (24,000 for each of two doors, or 48,000 for a single door).

Processor

Seimens™ 80C535 operating at a clock speed of 11.0592 Mhz.

Real-time Clock (RTC)

The microprocessor clock is used to generate an RTC.

Watchdog Timer (WDT)

The DPU-7920 provides a separate and discrete WDT circuit to supervise the operation of the unit. The WDT monitors the activity of the DPU and generates a restart sequence when it detects abnormal operation.

RAM Battery Backup

An on-board Ni-Cad rechargeable battery maintains RAM for approximately 30 days.

Standby Battery Backup (Optional)

Optional 12 VDC, 4 ampere-hour rechargeable battery maintains operational power for the controller card and up to two CSI key/card or I/DISC readers for approximately 8 hours. A power fail sensor circuit detects when battery backup power is in use.

Strike Power Supply Battery Backup (Optional)

Optional 12 VDC, 4 ampere-hour rechargeable battery and supply maintains operational power for the strike function. Backup time depends upon the strike current.

LAN Connection

Connection: 3-position plug-on terminalInterface: EIA RS485Data Rate: 9,600 baudCable length: 5,000 feet (1,500 m) maximumCable type: 22 AWG (0.324 mm2) shielded twisted pair (Belden 9841)

Reader Connection

Connection: Two 8-position removable terminal plugsInterface: TTL Level SignalCable Type: 6-8 Conductor Shielded 18–24 AWG (0.897 mm2–0.206 mm2) (CRDRDR and KEYRDR)Two shielded twisted pair cables for I/DISC reader.8 conductor shielded for other reader typesCable Length: Up to 300 ft. (90m) for CRDRDR and KEYRDR using 24 AWG (0.206 mm2). Up to 200 ft. (60 m) for I/DISC readerPower: 13 VDC or 5 VDC @ 50 mA max. for KEYRDR and CRDRD

Refer to TCON112 CSI Readers Installation Guide for specific readers

Power and Environmental Requirements

Voltage: 24 VAC (±10%) 50/60HzCurrent Requirement: 1.2A Max.Battery Charge Current: 2.0A Max. (short ckt.)

0.8A Typical

Operating Temperature:(without battery backup) 32˚ to 120˚F (0˚ to 49˚C)(with Lead-Acid battery backup): 50˚ to 100˚F (10˚ to 38˚C)Humidity: 10% to 80% RH, noncondensing

(UL Listed system tested/Listed only at 24VAC, 60Hz)

34 DPU 7920

Installation Guide Specifications

DPU Enclosure Assembly

Voltage (Model 7922): 120 VAC (50/60Hz ± 15%) (UL Listed system tested/Listed only at 24VAC, 60Hz)Voltage (Model 7923): 240 VAC (50/60Hz ± 15%) (Not investigated by UL)Power: 75 VA Max.Models 7920 and 7921 require 24-volt AC/DC power.

Field Inputs

Eight discrete input points (DI, DA, or AI), non-supervised or four supervised inputs.

Field Outputs

Eight form-C relays 24VAC outputs

Physical Description

Controller (Board & Baseplate only) Weight: 2 lbs. (0.9 kg)Dimensions: 9.6" L × 10" W × 1.5" H

(24.38 cm × 24.4 cm × 3.81 cm)

Controller in Nema 1 EnclosureWeight: 13 lbs. (5.85 kg)

with 4AH battery 18.5 lbs. (8.325 kg)Dimensions: 14.25" H × 14.25" W × 3.5" D

(35.625 cm × 35.625 cm × 8.75 cm)Enclosure: 16-gauge steel locking hinged door; seven 1⁄2" knockouts; four mounting key-holes on a 12" × 8.5" (30.5 cm × 21.6 cm) pattern

Note: DPU models 7921 and 7922 are UL294 Listed access control systems units.

DPU 7920 35

Index Installation Guide

38

Index

AAccess, 24-hour 1

Anti-passback 1

Auto-unlock 1

BBattery backup

for contact shunt outputs 2for door strike 2for DPU-7920 operation 1

CCold start 29

defining of 1

CommunicationsLED status 30loss of 30

Contact switchesinputs 16outputs 16

CSI Key/Card 1, 20

DDIP

baud rate setting 29cold start setting 29LAN addressing 16switch S1 settings, summary of 31warm start setting 29

Door connectionsnumber of 16

DPU-7920communications cable 2configurations 2

battery backup kit 3DPU-7921 2DPU-7922 2DPU-7923 2Intrusion kit 2

LANSee LAN

LED status 30operating distance 2setup 16stand-alone 30starting operation 14

II/DISC 1, 20

Input cablesterminal connections 5

Input configuration4-20 milliamp 27discrete input 26

Inputspoint addresses 31

Installation proceduresbattery backup 13contact shunt outputs 8door reader inputs 7door release switches 10door sense switches 5door strike switches 8LAN 11mechanical door interlock 9–10primary power 12tamper switch 11

36 DPU 7920

Installation Guide Index

LLAN

addressing 16communications 29setting address on 1

LEDDPU-7920

communications 30reader 22

see DPU-7920

MMag-Tek reader support 22

Monitoringpower loss 29

OOutput cables

terminal connections 8

PPower

loss of 30monitoring 29

RReaders

ABA Mag-Stripe 1, 22CSI Key/Card 1, 20I/DISC 1, 20LED operation 22number of inputs 16ports 18

selection ofABA Mag-Stripe 17CSI Key/Card 17I/DISC 17Indala 17Watermark 17Wiegand 17

signal breakout 19Watermark 1, 22Wiegand 1, 21

26-Bit format 2132-Bit format 21

Resistorinput configuration 27

SStartup sequence

cold start 28warm start 28

TTamper input

address 25point type 25

WWarm start 29

Watermark 1, 22

Wiegand 1, 21

DPU 7920 37

Repair or Replacement

If this unit fails to operate because of a defect in materials or workmanship within two (2) years of the date you purchased it, it will either be repaired or replaced by Control Systems International, Inc. (CSI) at no charge to you. Before contacting CSI, it is recommended that you first contact the dealer from whom you purchased this equipment to determine whether they will have it repaired or replaced. If the dealer will not, please contact CSI to arrange to have this equipment repaired or replaced.

CSI EXPRESSLY RESERVES THE RIGHT TO REPAIR OR REPLACE THIS EQUIPMENT WITH NEW OR REFURBISHED PARTS OR EQUIPMENT.

Exclusions and Limitations

Your warranty does not cover:

• Damage by negligence, misuse, or accident

• Compatibility with the equipment of any other

manufacturer

• Modifications to the equipment to make it compatible

with the equipment of any other manufacturer

• Damage to the equipment resulting from improper

installation or operation.

Legal Rights and Limits

All applicable implied warranties, including the implied warranty of merchantability and of fitness for a particular purpose given to you by law are hereby limited in durability to the duration of this warranty. Under no circumstances will CSI be liable for any incidental or consequential damages.

Some states in the U.S.A. do not allow limitations on how long implied warranties last, or exclusions or limitations of incidental or consequential damages, so exclusions or limitations mentioned may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Purchaser’s Responsibility

In order to obtain service under this warranty, you must deliver the equipment to the place of purchase or to CSI and provide proof of the original purchase date along with the returned equipment. Failure to provide adequate proof of the original purchase date could result in denial of warranty service.

Out of Warranty Service

Direct requests for information on out-of-warranty service to Product Service Manager at the address below.

P.O. Box 59469Dallas, TX 75229 USAPhone: +1 (972) 323-1111Fax: +1 (972) 242-0026

CSI EuropeSolutions HouseWhitwork Business ParkCoalville Leicestershire LE67 4JP United KingdomPhone: +44 (1530) 278000Fax: +44 (1530) 0278001

CSI Pacific36 Hasler Rd.Osborne Park, W. A. 6017 AustraliaPhone: +61 (89) 244 2799Fax: +61 (89) 244 4335

You may obtain copies of this document by ordering document number TCON117.

TCON117.–.06/00

Warranty

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