1. vi
®
Installation Guide
Door Processor Unit 7910A
DPU 7910A
for I/NET® Building Automation Systems
TCON116.—.06/00

2. 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.
 1993 – 2000 by Control Systems International. All rights reserved.
Printed in the United States of America.
Document Number: TCON116–06/00
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.

3. Installation Guide
Contents
FCC Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
Overview . ........................................... 1
DPU-7910A Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Reader Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
On-board Battery Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Optional Standby Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DPU-7910A Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DPU- 7910A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DPU-7911A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DPU-7911AU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DPU-7912A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DPU-7912AU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DPU-7913 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Intrusion Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Battery Backup Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Reader Installation Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installing the DPU-7910A . ............................... 6
Installing the Input Cables . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .6
Sense Switch Connections . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .6
Installing Supervised Field Inputs . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .7
Connecting the Door Reader Inputs . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .8
Installing the Output Cables . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .8
Connecting the Door Strike and Contact Shunt Output . . . . . . . . . . . . . . . . . . . . . . . .9
Mechanical Door Interlock Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DP LAN Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Connecting the Tamper Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Connecting Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Connecting the Optional Battery Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Starting Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
DPU 7910A iii

4. Installation Guide
Grounding Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Earth Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Baseplate Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
LAN Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Setup and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Addressing the DPU-7910A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Reader Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
LED Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Two-color LED Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Three-color LED Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
CSI Key/Card Reader Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
I/DISC Reader Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Wiegand Reader Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Indala Proximity Reader Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Watermark Reader Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
ABA Standard (Track 2) Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Discrete Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Addressing the Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Tamper Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Supervised Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Battery Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Start-up Sequence Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Cold Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Warm Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Setting Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Monitoring for Primary Power Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
LED Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
DPU-7910A Stand-alone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
DIP Switch and Point Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
DIP Switch S2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
iv DPU 7910A

5. Installation Guide
Pinout Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
DPU 7910A v

6. 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 7910A

7. 34
Installation Guide Overview
Overview
The Door Processor Unit 7910A (DPU-7910A) manages and controls individual access
to restricted areas when incorporated into the I/NET access control system. The
DPU-7910A is a microprocessor-based control unit that combines data processor,
memory, communications, and field inputs. The unit controls up to two doors using
four reader inputs, four discrete inputs, two contact inputs, and two relay contact
outputs for each door. By processing the input data with programmed information, it
controls access into, and exit from an area. It can monitor the status of the door and route
this information to selected I/NET workstations and printers. The DPU resides on a sub
LAN network controlled by either the 7791 Door Processor Interface (DPI), 7793 Micro
Control Interface (MCI), or 7798 I/SITE LAN.
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 10.
DPU-7910A Features
The DPU 7910A 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.
The DPU-7910A configuration is controlled by DIP switch settings on the interface
board. These settings establish the DPU-7910A's LAN address, LAN baud rate,
warm/cold start, translation table use, and LED operation.
Reader Support
The DPU-7910A can recognize CSI's access control readers including:
✦ I/DISC
✦ Watermark
✦ 26-bit and 32-bit Wiegand
✦ 66-bit Wiegaind (requires DPU firmware version 2.20 or later)
✦ ABA Mag-Stripe
✦ Mag-Tek.
The DPU can be configured to use any of these readers through the I/NET Door Exten-
sion Editor (66-bit Wiegand requires I/NET 2000 version 2.x or later). Changing resistors
on the DPU allows you to connect low-level drive current readers to the unit. Addition-
DPU 7910A 1

8. Overview Installation Guide
ally, you can assign the anti-passback, first key auto-unlock, and 24-hour access options
with the I/NET Door Extension Editor.
Memory
The DPU-7910A contains 128 KB of memory: 64 KB of EPROM and 64 KB of
battery-backed RAM. The DPU provides event buffering, and it stores activity messages
that are also protected by the on-board battery backup.
Depending on the firmware version loaded in the DPU, the 64 KB of RAM is allocated
as follows:
✦ Fixed allocation (firmware version prior to 2.20):
Fixed memory allocation provides storage for up to 100 messages and up to a
24,000-user database for each of two doors.
✦ Dynamic allocation (firmware version 2.20 or later):
This provides dynamically allocated storage for varying combinations of up to
5,000 messages (approximately) and up to 48,000 users (up to 24,000 for each of
two doors, or up to 48,000 for a single door). Refer to the Access Control chapter in
the I/NET 2000 Technical Reference Guide for more information about DPU
dynamic memory allocation.
On-board Battery Backup
Caution: This product contains a Nickel Cadmium rechargeable battery. The battery should not be
burned or incinerated when disposing of this product.
An on-board Ni-Cad battery (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-7910A to resume controlled access operation when the power is restored.
Optional Standby Battery
An optional standby 12 VDC, 4 ampere-hour battery provides power to the DPU-7910A
that enables full operation during a power loss. Controlled access continues for the dura-
tion of the standby battery life until normal power is restored. The back-up battery
system provides up to eight hours of supervised operation during power failures.
A strike power supply can be included to provide battery backup for the door strike and
contact shunt outputs when the primary power is lost. This backup battery is in addition
to, and separate from, the standby battery that powers the DPU-7910A controller card
during a power loss.
Communication
The DPU-7910A communicates with the supervised points through shielded, twisted-
pair cable. The operating distance between the DPU-7910A and the points supervised or
controlled is a maximum of 300 feet (90 m) on an input or output line. The DPI or MCI
communicates 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.
2 DPU 7910A

9. Installation Guide Overview
DPU-7910A Configurations
There are four basic configurations for the DPU-7910A.The first configuration is the
controller card mounted on a baseplate; the second configuration adds an enclosure and
accessories in an unassembled kit. The third and fourth configurations add the enclosure
and power transformer for 120 VAC and 240 VAC as an assembly. Figure 1 illustrates the
DPU-7910A controller card. The DPU-7910A card measures 2.27quot;W × 12quot;L (8.56 ×
30.48 cm), and it is mounted on a 4quot;W × 14quot;L (10.16 × 35.56 cm) baseplate with a
keyhole pattern of 3.5quot;W × 13quot;L (8.89 × 33.02 cm).
DPU- 7910A
The DPU-7910A controller card mounts on a baseplate. This model is suitable for
installing/mounting in a customer-provided enclosure. This model is equipped only
with the electronics board. A suitable enclosure with a 24 VAC power supply must be
provided. The baseplate assembly is 14 × 4 inches (35.56 cm × 10.16 cm).
Note: The model DPU-7910A (baseplate only) product is not UL Listed.
DPU-7911A
This model includes a DPU controller card that is mounted in a NEMA 1 style indoor
metal enclosure (with plug-in transformer and other accessories in a kit). The enclo-
sure's dimensions are 14.25quot;W × 14.25quot;H × 3.5quot;D (36.19 × 36.19 × 8.89 cm). The enclo-
sure has conduit knockouts on all four sides.
DPU-7911AU
This UL Listed model includes a DPU controller card that is mounted in a NEMA 1 style
indoor metal enclosure (with plug-in transformer and other accessories in a kit). The
enclosure dimensions are 14.25quot;W × 14.25quot;H × 3.5quot;D (36.19 × 36.19 × 8.89 cm). The
enclosure has conduit knockouts on all four sides.
DPU-7912A
This model includes a DPU controller card that is mounted in an indoor metal enclo-
sure. It also has a power transformer that will accept 120 VAC power input.
DPU-7912AU
This UL Listed model includes a DPU controller card that is mounted in an indoor metal
enclosure. It also has a power transformer that will accept 120 VAC power input.
DPU-7913
This model is the same as the DPU-7912A, except that it has a power transformer that
will accept 250 VAC power input. This model is not UL Listed.
DPU 7910A 3

10. Overview Installation Guide
3.65 quot;
S1
TB2 TB1
1
1
Reset 2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
S2 10
OFF
11
12
123456 7 8 9 10 11 12
J3
J4
J5
12.00 quot;
J6
13.00 quot;
14.00quot;
RS4
2B
1
2
3
4
5
6
7
2A
8
J12
RS6
1
2
1B
3
4
5
6
Status
7
TX
RX
8
1A
P5
TB4 TB3
12345678
123
3.51 quot;
4.17 quot;
Figure 1. DPU–7910A Controller Card and Baseplate
4 DPU 7910A

11. Installation Guide Overview
Intrusion Kit
This separate option kit (required in UL Listed systems) provides an intrusion (tamper)
switch that signals the host when the enclosure lid is opened. This kit contains mounting
hardware as well as the switch (p/n KITSW). This option is not factory installed. It is
shipped in kit form only.
Battery Backup Kit
This 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 four key/card readers for approximately eight hours (model
number KITBAT). To order only the battery brackets, order model number KITBB. This
option is not factory installed. It is shipped in kit form only.
Note: Battery backup power supply is provided to the controller card only. A separate optional
battery backup for the door strike signal is also available.
Reader Installation Kit
This separate option kit (KITRDRCON) provides a dual-breakout box and two reader
cables (CBL063). It is used to connect the readers to the DPU.
Related Manuals
The following manuals provide information related to the use and operation of the
DPU-7910A:
✦ 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
DPU 7910A 5

12. Installing the DPU-7910A Installation Guide
Installing the DPU-7910A
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 15 during equip-
ment installation.
The DPU-7910A must be placed in an acceptable environment for the electronics (see
Specifications) 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, proceed with the physical, electrical, and electronic installation.
Installing the Input Cables
Each door can have an entry and exit key/card reader, a sense switch, and an optional
door release switch. If installing an exit key/card reader for a door, a door release switch
is not required. The Sense and Release contacts connect to the terminals of TB2 as indi-
cated below.
Table 1. Sense and Release Signal Connections
Terminal Post Number Function
TB2-1 Door 1 Sense Switch Input
TB2-2 Door 1 Sense Switch Common
TB2-3 Door 1 Release Switch Input (see note)
TB2-4 Door 1 Release Switch Common (see note)
TB2-5 Door 2 Sense Switch Input
TB2-6 Door 2 Sense Switch Common
TB2-7 Door 2 Release Switch Input
TB2-8 Door 2 Release Switch Common
Note: In UL Listed systems, the release switch wiring must be within the
restricted area protected by the controller.
Warning: Disconnect power from all interconnected equipment before performing electrical installa-
tion. Failure to disconnect power may result in electrical shock and/or severe burns.
Sense Switch Connections
Connect the sense switches as illustrated below. Select the type of contact (N.O. or N.C.)
using the Door Extension Editor. The switch type is defined as N.O. or N.C. with the
door in the closed position. The example in Figure 2 shows Normally Open contacts, and
the procedure is detailed below.
1. Connect one wire to the sense input, TB2-1 (see Figure 2).
2. Connect the other wire to the sense common, TB2-2.
6 DPU 7910A

13. Installation Guide Installing the DPU-7910A
3. Repeat steps 1 and 2 for door 2 using TB2 posts 5 and 6.
Door 1 Sense Switch
(normally-open contact)
Shield TB2
1 +
Sense 1
2 –
Note: Door sense switch 3 +
Release 1
contacts close when
4 –
door is opened.
5 +
Sense 2
6 –
7 +
Release 2
8 –
Door 2 Sense Switch
S2
(normally-open contact) OFF
1 2 3 4 5 6 7 8 9 10 11 12
To Enclosure Ground
Figure 2. Sense Switch Connection Example
Installing Supervised Field Inputs
Supervision may be accomplished on a single Normally Open or Normally Closed
contact, or on multiple Normally Open contacts connected in parallel. The contacts may
be supervised for line cuts by using a single resistor connected in parallel with the
contact. If you want additional supervision for line shorts, an additional resistor
connected in series with the contact may be used. The resistor for either shall be 1K ohm,
1⁄ W, ±5%, or 1K ohm, 1⁄ W, ±1%. The Resident I/O Points editor of the I/NET Host
4 4
must be configured for either single resistor supervision, or two resistor supervision. See
Figures 3 and 4 for resistor placement.
Single resistor supervision with a parallel resistor. Double resistor supervision with a
Configuration is the same for normally closed parallel and a series resistor.
switch/contact.
Entire circuit is supervised for line cuts (“open” wire)
Entire circuit is supervised for line cuts (“open” wire)
1K
1K
1K
Parallel Resistor
Parallel Resistor
Series Resistor
Portion of circuit is supervised for
jumpers (“shorts” in wiring)
Normally Open Switch/Contact Normally Closed Switch/Contact
Note: The components shown inside the dashed boxes
should be in close physical proximity.
Figure 3. Supervised Single Switches/Contacts
DPU 7910A 7

14. Installing the DPU-7910A Installation Guide
Single resistor supervision with a Double resistor supervision with a
parallel resistor. parallel and a series resistor.
Entire circuit is supervised for Entire circuit is supervised for
line cuts (“open” wire) line cuts (“open” wire)
Parallel Resistor Parallel Resistor
Series Resistor
Portion of circuit is supervised for
jumpers (“shorts” in wiring)
Note: The components shown in the dashed box
should be in close physical proximity.
Figure 4. Supervised Multiple Switches
Connecting the Door Reader Inputs
The reader inputs for each door connect through RJ45 modular jacks on the right-hand
side of the controller card. When you are configuring for entry and exit readers, use ports
1A and 2A for the entry doors and ports 1B and 2B for exit doors (see Figure 10).
When connecting ABA, I/DISC, INDALA, or Wiegand readers, use the breakout box and
connect the reader wires to the terminal board using the signal names described in
Table 6 on page 19 (or refer to TCON112, CSI Readers Installation Guide).
Note: UL Listed systems must use the CSI model IDISCRDRB or IDISCRDRMP readers.
Installing the 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 outputs terminal (TB1)
uses the terminal posts as shown below.
Table 2. Strike/Shunt Relay Output Connections
Terminal Post Number Function
TB1-1 Door 1 Strike N.C. Contact (see note)
TB1-2 Door 1 Strike Common (see note)
TB1-3 Door 1 Strike N.O. Contact (see note)
TB1-4 Door 1 Shunt N.C.Contact
TB1-5 Door 1 Shunt Common
TB1-6 Door 1 Shunt N.O. Contact
TB1-7 Door 2 Strike N.C. Contact (see note)
TB1-8 Door 2 Strike Common (see note)
TB1-9 Door 2 Strike N.O. Contact (see note)
8 DPU 7910A

15. Installation Guide Installing the DPU-7910A
Table 2. Strike/Shunt Relay Output Connections (Continued)
Terminal Post Number Function
TB1-10 Door 2 Shunt N.C. Contact
TB1-11 Door 2 Shunt Common
TB1-12 Door 2 Shunt N.O. Contact
Note: The maximum door strike contact ratings to a UL Listed DPU-7910AU
system is 24 VAC/VDC at 1 ampere.
Warning: Failure to disconnect power from all interconnected equipment when performing electrical
installation may result in electrical shock and/or severe burns.
Connecting the Door Strike and Contact Shunt Output
The door strike and shunt output can be connected as shown in Figure 5. The procedures
are detailed below.
1. Connect the magnetic strike positive lead to the appropriate strike contact output
on TB1. The options are as follows:
✧ Door 1: For a normally-closed switch, use the NC contact at TB1-1. For a
normally-open switch, use the NO contact at TB1-3.
✧ Door 2: For a normally-closed switch, use the NC contact at TB1-7. For a
normally-open switch, use the NO contact at TB1-9.
2. Connect the magnetic strike negative lead to the negative side of the strike power
supply.
Note: A metal oxide varistor (MOV) must be installed across the strike coil. Use CSI P/N
604790-0004.
3. Connect the positive lead from the strike power supply to the appropriate common
contact output on TB1. The options are as follows:
✧ For Door1, use TB1-2.
✧ For Door 2, use TB1-8.
4. Connect the two shunt leads from the door open/closed switch to the appropriate
contacts on TB1. The options are as follows:
✧ Door 1: For a normally-closed switch, make a parallel connection to the DPU
using the NO contact at TB1-6 and the common contact at TB1-5. For a
normally-open switch, make a series connection to the DPU using the NC
contact at TB1-4 and the common contact at TB1-5.
✧ Door 2: For a normally-closed switch, make a parallel connection to the DPU
using the NO contact at TB1-12 and the common contact at TB1-11. For a
normally-open switch, make a series connection to the DPU using the NC
contact at TB1-10 and the common contact at TB1-11.
DPU 7910A 9

16. Installing the DPU-7910A Installation Guide
11 (Series connection
To Third-Party
10 for normally-open
Panel
switch)
9
8
7
Magnetic Door
6
C Open/Closed Switch
5
(Normally-Open)
NC
4
OR
TB1
12
11 (Parallel connection
To Third-Party
for normally-closed
10 Panel
switch)
9
8
7
NO Magnetic Door
6
Open/Closed Switch
C
5
(Normally-Closed)
MOV
4
(CSI P/N 604790-0004)
3
C
+ –
2
Power
NC
Magnetic Strike
1
Supply
(Normally-Closed)
Figure 5. Example of Door 1 Strike and Shunt Connections
Mechanical Door Interlock Wiring
When the DPU-7910A door release outputs are used as a part of your mechanical door
interlock, you can 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-7910A 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 provides a logical means, as well as a mechanical means, to break power
to the door lock.
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
egress.
Warning: One of 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.
(In UL Listed systems, the release switch wiring must be inside the restricted area protected
by the DPU-7910AU.)
10 DPU 7910A

17. Installation Guide Installing the DPU-7910A
TB2 TB1
S1Reset
1 12
2 11
3 10
4 9
5 8
6 7
MOV
7 6
CSI P/N 604790-0004
8 5
4
S2
3
OFF
2
1 2 3 4 5 6 7 8 9 10 11 12
1
+
Strike Power
Supply
(Not Supplied
by CSI)
–
Release Switch
+
Door Release Magnetic Strike
Normally Open Normally Closed
–
Figure 6. Mechanical Door Interlock Example
1. Connect the magnetic strike positive lead to the appropriate strike contact output
on TB1. The options are as follows:
✧ Door 1: For a normally-closed switch, use the NC contact at TB1-1. For a
normally-open switch, use the NO contact at TB1-3.
✧ Door 2: For a normally-closed switch, use the NC contact at TB1-7. For a
normally-open switch, use the NO contact at TB1-9.
2. Connect the magnetic 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 the appropriate common
contact output on TB1. The options are as follows:
✧ For Door 1, use TB1-2.
✧ For Door 2, use TB1-8.
5. Connect the two wires from the door interlock switch to the appropriate release
contacts on TB2. The options are as follows:
✧ Door 1: Connect one wire to the release input contact at TB2-3. Connect the
other wire to the release common contact at TB2-4.
✧ Door 2: Connect one wire to the release input contact at TB2-5. Connect the
other wire to the release common contact at TB2-6.
DPU 7910A 11

18. Installing the DPU-7910A Installation Guide
DP LAN Connections
Note: Stand-alone UL Listed applications do not use LAN connections.
The DPU-7910A can be connected to the DP LAN through an RS485 port (TB4) using
shielded, twisted-pair cable (refer to “Specifications” on page 31). Wire the DPU-7910A
parallel with the other DPUs on the DP LAN — all the positive lines connect to the
COM+ (terminal 1) and all the negative lines connect to the COM– (terminal 2).
Warning: Failure to disconnect power from all interconnected equipment when performing electrical
installation may result in ELECTRICAL SHOCK and/or SEVERE BURNS.
1. Connect the negative line to COM– (TB4-2).
2. Connect the positive line to COM+ (TB4-1) as indicated in Figure 7.
P5
12345678
123
TB3
TB4
Com +
Com –
Tamper –
Tamper
Switch
Tamper +
Earth Ground at
one location only!
Figure 7. LAN and Tamper Switch 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, DPI, or controller).
12 DPU 7910A

19. Installation Guide Installing the DPU-7910A
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-7910
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 TB3.
1. Using two number 4 hex nuts, mount the tamper switch bracket inside the lip of
the enclosure, using the two 4-40 × 3⁄8quot; studs provided just below TB3.
2. Using two number 4 hex nuts, mount the magnet to the two studs provided along
the bottom edge of the DPU enclosure door.
3. Connect the switch leads to terminals TB3-7 (TMP+) and TB3-8 (TMP–), located
at the base of the DPU-7910A circuit card (see Figure 7).
Power Connections
Connect the primary power, 24 VAC, to the power strip terminals. Use the following
procedure to install primary power to the DPU-7910A at port TB3.
Caution: Connect only one device to a transformer. Do not attempt to use the same AC transformer
for any sub-LAN device (DPU) and its associated LAN interface device (DPI or MCI). This
will result in improper operation of one or both of the devices.
Warning: Failure to disconnect power from all interconnected equipment when performing electrical
installation may result in ELECTRICAL SHOCK and/or SEVERE BURNS.
Connecting Power
1. Remove the power to the power line at the circuit breaker box.
2. Connect the 24 VAC power input across terminals 1 and 2 of TB3 — located along
the base of the DPU circuit card.
3. Connect terminal 3 of TB3 to the Electrical Service Earth Ground wire. The enclo-
sure should also be well grounded. Connect the ground line to EGND (TB3-3) as
indicated in Figure 8.
4. Restore the power to the power line at the circuit breaker box.
Connecting the Optional Battery Backup
The DPU-7910A has an optional 12 VDC, 4 ampere-hour battery backup to enable oper-
ation during primary power failure. Use the following procedure to install the backup
battery to port TB3.
Note: In UL Listed systems, the battery backup must be installed.
DPU 7910A 13

20. Installing the DPU-7910A Installation Guide
P5
123 12345678
TB3
TB4
Pwr +
Pwr -
EGND
Bat +
Bat -
-
4 Ampere-Hour
24 VAC 12V Battery
+
40 VA Power
Transformer
Figure 8. Battery and Power Connections
Warning: Failure to disconnect power from all interconnected equipment before performing electrical
installation may result in electrical shock and/or severe burns.
1. Remove the power to the power line at the circuit breaker box.
2. Place the battery in the DPU-7910A 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 battery positive terminal (see Figure 8) to the
BAT+ (at TB3-4).
5. Connect the black battery lead from the battery negative terminal to the BAT– (at
TB3-5).
6. Restore the power to the power line at the circuit breaker box.
Note: Do not install the maintenance-free, lead-acid battery that is specified for use with the
DPU in a sealed enclosure. When installing the battery option in the DPU enclosure,
remove the cover from at least one of the unused knockouts in the enclosure.
Starting Operation
After installing the DPU-7910A and all associated equipment, initialize the DPU-7910A
as follows:
1. Apply operating power to the DPU-7910A and other components. Observe the
STATUS LED to verify that the DPU-7910A automatic self-test is successful. This
LED remains ON after a successful self-test.
2. Clear the DPU-7910A memory by turning DIP switch 8 ON, and pressing the reset
switch. Observe the STATUS LED to verify that the DPU-7910A automatic self-test
is successful.
14 DPU 7910A

21. Installation Guide Installing the DPU-7910A
3. Turn the DIP switch 8 to the OFF (warm-start) position.
4. Program the system operating parameters into the DPU-7910A using I/NET.
Grounding Requirements
To 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.
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, DPI, or a single controller).
Note: LAN connections are not UL tested.
DPU 7910A 15

22. Setup and Operation Installation Guide
Setup and Operation
The DPU-7910A mounts on an indoor wall surface within area that meets this unit's
environmental specifications (refer to “Specifications” on page 31). The DPU address,
baud rate, and warm/cold start option must be set on the DPU controller card first.
These DIP switch settings are effective upon entering them and reset or cycle the DPU
power.
The DPU-7910A connects to two doors. Each has two reader inputs, two contact inputs,
and two relay contact outputs. Table 3 identifies these inputs and outputs.
Table 3. DPU-7910A Supervised Devices
Equipment Function
Key, card, or other form of identification tag used to determine entry and exit
authorization through the door. These tags can use CSI proprietary
magnetic stripe keys and cards, I/DISC, industry-standard ABA magnetic
Key/Card Reader,
stripe, proximity, Wiegand, or a multitude of others that provide Wiegand-
I/DISC Reader, or
type output signals.
Card Reader with
PIN Pad Supported PIN pad equipped card readers include: Motorola/Indala
ARK501 proximity/PIN reader, Dorado 780 swipe/PIN reader, and Hughes
Proxpro proximity/PIN reader.
Door Release Dry contact inputs that are Normally Open (NO) or Normally Closed (NC).
Switch When the release button is pressed, the door is released.
Dry contact inputs that are Normally Open or Normally Closed. It monitors
Door Sense Switch whether the door is open or closed. It enables the door strike to relock
immediately upon door closure.
Dry relay contact outputs that are Normally Open or Normally Closed. This
Door Strike
contact controls the 12–24 VAC/DC voltage to the door strike.
Dry relay contact outputs that are Normally Open or Normally Closed. It can
Door Shunt be used to bypass a “door open” signal when the DPU-7910A releases the
door.
Addressing the DPU-7910A
Set the LAN address (0–31) using DIP switches S2-1 through S2-5 before you “hook up”
the communication lines. The LAN address is effective upon entering the information
and resetting the DPU. The factory-set address for the DPU-7910A is number 1. The
switches are binary, and they contribute their address value to the other switches when
ON. The following table presents these values.
Table 4. DIP Switch S2 Address Values
Switch Position 1 2 3 4 5
Switch Value 1 2 4 8 16
16 DPU 7910A

23. Installation Guide Setup and Operation
For example, when only switch S2-1 is ON, the DPU-7910A address value is 1. When
only switches S2-1 and S2-3 are ON, the address value is 5 (1 + 4 = 5). To set the
DPU-7910A to Address 31, set switches S2-1 through S2-5 to the ON position.
Reader Inputs
The DPU-7910A provides a common interrupt-driven hardware interface for several
different reader types. The reader type must be selected through the I/NET Doors
Parameters Editor.
The selection through I/NET of a reader requires a download of the reader type from the
host system. Currently-defined readers include the following:
✦ Standard CSI I/NET (key, card, insert, and swipe)
✦ Indala I/NET
✦ 26-bit Wiegand
✦ 32-bit Wiegand
✦ 66-bit Wiegand with or without PIN pad (66-bit Wiegand support requires I/NET
2000 version 2.x and later, and DPU firmware version 2.20 or later)
✦ ABA Mag-Stripe
✦ Watermark Magnetics
✦ I/DISC without PIN pad (PIN pad supported on DPU-7920 only)
When the DPU is used with I/DISC or Wiegand readers (or those readers that deliver a
Wiegand-type signal output), the plug-on shunts that are labeled J3–J6 must be moved
from the B and C posts (factory default) to the A and B posts. For all other reader types,
keep the shunts in the factory-set positions at B and C posts. If selecting a Mag-Tek or
low–level drive current reader, the resistors in RS4 and RS6 should also be changed.
Note: You can use different reader types for Door 1 and Door 2. Door 1 uses shunts J3 and J4, and
Door 2 uses shunts J5 and J6. Entry and Exit readers on the same door must be the same
type.
When using the Mag-Tek (MT211/215) or any other reader with an output signal-level
of less than 5 mA, the resistors plugged into RS4 and RS6 should be changed from 1K to
4.7K 1⁄4W 5% resistors (P/N 800475-19). RS4 is used for reader ports 2A and 2B and RS6
is used for reader ports 1A and 1B as shown in Figure 9.
The readers connect to the DPU-7910A through the four RJ45 modular jacks that are
located on the right-hand side of the controller card (see Figure 10). Each door can have
two readers (i.e., entry and exit). This allows anti-passback operation for both doors.
Table 5 presents the ports and their functions.
The RJ45 modular jack provides connections for up to eight signal conductors from the
various reader types. When using the CSI Mag-Stripe Key/Card readers and the standard
modular reader cables, the reader connection simply plugs the appropriate cable from
the desired reader into the appropriate jack. When connecting the DPU to other types of
readers, you will typically need to attach discrete signal conductors from the reader to the
DPU. Refer to TCON112, CSI Readers Installation Guide for connection information.
DPU 7910A 17

24. Setup and Operation Installation Guide
RS4
1 2B
2
Mag-Tek or low-level 3
output device 4
5
For less than 5mA reader 6
drive current, use 4.7K ohm 7
2A
8
1/ W resistors
4
Reader Jacks
I/DISC Reader
RS6
For 5mA and above reader 1
1B
drive current, use 1K ohm 2
3
1/ W resistors
4
4
5
6
Status
7
TX
RX
8
1A
Figure 9. Reader Resistors
Table 5. Reader Ports
Port Function
1A Entry Door number 1
1B Exit Door number 1
2A Entry Door number 2
2B Exit Door number 2
Discrete contacts connect to the DPU reader port through optional breakout boxes. A
breakout box provides an eight-screw terminal board for each required reader port. Each
breakout box provides terminal board connection support for two readers, and they can
be ordered as part of the DPU model number or by the kit designation of part number
KITRDRCON. The kit provides a dual-modular RJ45-to-terminal assembly with adhe-
sive backing, which is suitable for installation in the DPU enclosure. Two 8-inch modular
cables provide connection of the breakout box to the reader ports you select. When three
or four reader connections are required, you can install up to two kits.
The eight signal conductors from the DPU RJ45 port are presented on the eight screws
(numbered 1 – 8). Table 6 identifies the function of the signals with the various reader
types.
18 DPU 7910A

25. Installation Guide Setup and Operation
2B
2A
Reader Jacks
J12
1B
Status
TX
RX
1A
P5
123 12345678
TB3
TB4
Com +
Com -
Power +
Power -
Earth Ground
Battery +
Battery -
Tamper +
Tamper -
LAN Terminal
Figure 10. Reader Jacks
Table 6. Reader Signal Breakouts
Terminal Number Signal Function
13 VDC power supplied to the reader from the DPU. Maximum current drain for each reader
1 +DC Power
should be 50 milliampere. This conductor typically powers CSI and ABA Mag-Stripe readers.
The shield from the reader cable usually connects here. If the ground for the shield is to originate
from the DPU, then the plug-on shunt/jumper labeled J12 should be placed across posts A and
2 Chassis
B. This jumper is shipped from the factory and plugged onto the B post only (i.e., no chassis
ground connection on terminal 2).
DATA With Mag-Stripe and I/DISC readers, this conductor carries the DATA signal from the reader.
With Wiegand readers, this conductor carries the DATA-1 signal from the reader. The signal
3
DATA-1 normally rests at 5 volts, but pulses to 0 volts upon the detection of logic 1 bits in the Wiegand
data sequence.
5 VDC power supplied to the reader from the DPU. Maximum current drain for each reader
4 +DC Power
should be 50 milliampere. This conductor typically powers Wiegand readers.
DPU 7910A 19

26. Setup and Operation Installation Guide
Table 6. Reader Signal Breakouts (Continued)
Terminal Number Signal Function
With the Mag-Stripe readers, this conductor carries the CLOCK signal from the reader. This
CLOCK signal normally rests at 5 volts, but pulses 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.
5
With Wiegand readers, this conductor carries the DATA-0 signal from the reader. The signal
DATA-0 normally rests at 5 volts, but pulses to 0 volts upon the detection of logic 0 bits in the Wiegand
data sequence.
This signal drives a red LED located in the reader. The actual color of the LED 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.
NOTE: LED polarity is configurable using the Door Extension Editor.
6 Red LED
The DPU momentarily displays the red LED when a key/card was successfully read, but not
authorized to release the door. The red LED flashes for a couple of seconds when the DPU
detects a key/card entry, but it does not successfully read the data from the reader (i.e., a retry
is necessary).
This signal drives a green LED located in the reader. The actual color of the LED 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.
NOTE: LED polarity is configurable using the Door Extension Editor.
7 Green LED The DPU momentarily displays the green LED when a key/card was successfully read, accepted
by the DPU, and authorized to release the door. The green LED control signal also flashes for a
couple of seconds when the DPU detects a key/card entry, but it does not successfully read the
data from the reader (i.e., a retry is necessary). The double-flash function (red and green LED)
indicates a bad read condition (i.e., some readers have only one LED).
8 DC Ground This conductor connects the DC signal ground from the DPU to the reader.
LED Operation
The DPU-7910A provides two LED control outputs for each connected reader. These
control outputs operate with the discrete LEDs that are provided by many readers.
Two-color LED Control
For dual-color operation, the DPU requires a discrete control-wire connection to each
of the two colored LEDs. Additionally, the LED DPU control signal uses the following
logic:
✦ Positive: 0 volts = OFF and 5 volts = ON
✦ Negative: 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.
Note: With single LED Wiegand readers, connect the LED wire to Terminal 7 of the Breakout
Box. This enables the LED to follow the state of the strike/shunt outputs of the DPU (i.e.,
secure/unsecure state of the door).
Note: LED polarity is configurable using the Door Extension Editor (either positive or negative
logic).
The LEDs may be a color other than red or green, but the output for these LEDs is still
referred to as red or green LED output.
20 DPU 7910A

27. Installation Guide Setup and Operation
The red LED output indicates two conditions. The red LED output is placed in the ON
state for one second to indicate an unauthorized key/card entry. The red and green LED
output flashes five times within one second to indicate that a key/card was detected, but
not read successfully.
With all readers, the green LED output is used to indicate 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 continuously in the ON state while the strike is de-energized (i.e., door is
open).
The green LED output also indicates a bad key/card read condition. A bad read causes
both the green and the red LED outputs to flash for one second. This double-flash LED
displays for readers that provide only one DPU-controlled LED. This guarantees that a
user always receives visual feedback and prompts them to re-enter the key/card if neces-
sary.
Table 7. Access Control Readers LED Output
State Red LED Green LED
Normal Off Off
Bad Key Read Blink Blink
Rejected Key On Off
Valid Key Off On
Open Door Off On
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 S2-11 to ON. For Door 2, set DIP switch S2-12 to ON.
Table 8. Three-color LED Output
LED Control Reader LEDs
Typical Function
Control A Control B Red Yellow Green
Lo Lo Locked (Disabled) Off Off Off
Normal State, Waiting
High High On Off Off
for Card Swipe
High Lo Waiting for PIN Off On Off
Valid PIN, Door
Lo High Off Off On
Unlocked
– – Bad Read Flashing Off Off
DPU 7910A 21