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Access Control Module V4.1

DGP-ACM12

Installation Instructions

paradox.com

Printed in Canada 09/2007                                ACM12-EI01

Introduction

The Access Control Module (DGP-ACM12) is designed to be used with the 
Digiplex EVO System control panels. Each DGP-ACM12 allows you to 
connect a reader, a REX device, a door contact and a locking device to 
control the access to one door. If desired, door contacts can also be assigned 
to zones in the control panel to link the doors to the alarm system. This will 
allow you to use the same door for the access control system and the alarm 
system. 

What’s New 4.1

The backlight intensity defaults in sections [025] and [026] are now 003

What’s New 4.0

Allows access with Card and Pin and Card or PIN when used with a 
DGP-R915 or CR-R885-BL

Allows arming with PIN or Card and PIN when used with a DGP-R915

Transformer Sharing: Use one transformer to power multiple modules 
with transformer sharing. Respect the maximum power output of the 
transformer. See Figure 1 for more information.

Technical Specifications

Installation

The module is connected to the control panel’s combus as shown in Figure 1. 
Please refer to the control panel’s Programming Guide for the maximum 
installation distance. Devices connected to the PGM output must be 
connected as shown in Figure 2. Refer to Figure 5 for connection drawings for 
the REX device, reader, locking device and door contact.

The door contact follows the control panel’s EOL definition. When 
EOL is enabled and the door contact is not used, place a 1k

9

 resistor 

across the 

CT

 and 

AUX

- input terminals. If EOL is disabled, use a 

jumper. If the REX device is not used, place a jumper across the 

REX

 

and 

AUX

- terminals.

AC Power

Use a 16.5Vac (50/60 Hz) transformer with a minimum 20VA. as shown 
in Figure 1. Do not use any switch-controlled outlets to power the 
transformer.

Backup Battery

To power the module’s door lock relay during a power failure, connect a 
12Vdc 4Ah rechargeable acid/lead or gell cell backup battery as shown in 
Figure 1. Connect the battery after applying AC power. 

Inverting the polarity when installing the battery will blow the battery 
fuse.

Connecting the External Negative Trigger

The DGP-ACM12 comes with an external negative trigger. You can use a 
PGM from the control panel or another module to release the access 
control door lock. The external negative trigger can also be triggered 
using a push-button. When the push button is pressed, the door will 
unlock. The PGM or push-button must ground the negative trigger. 
Connect the push-button as shown in Figure 2. 

LED Display

AC (Green):

On when receiving AC power.

BATT (Green): On when charging and during battery tests.
AUX (Yellow): On when auxiliary output is active.
ERROR (Red):Indicates a problem with the module.
RX (Green):

Flashes when receiving information from the panel.

TX (Green):

Flashes when transmitting information to the panel.

Connection Diagrams

Figure 1: Connecting the power and combus

Figure 2: Additional Connection Information

Figure 3: Connecting a 4-Wire Reader (DGP-R910 / DGP-R915)

Figure 4: Connecting a 7-Wire Routing Cable

Figure 5: Connecting Access Control Devices

Figure 6: Connecting for Firmware Upgrade (CONV4USB)

AC Power:

16Vac, 20/40VA, 50 - 60Hz

Aux. Power:

12Vdc, typical 600mA, 1A max.

Battery:

12Vdc, 4Ah minimum

No. of Outputs:

2; one 50mA PGM output, one form C relay rated at 5A/
28Vdc, N.O./N.C.

No. of Zones:

2 (Door Contact & REX device)

No. of Inputs:

2 (Negative Trigger & Tamper inputs)

Control Panel
Compatibility:

Any DGP-848 control panel with access control
Any DGP-NE96 control panel
Any EVO control panel

Table 1: Special Display

Error

RX

TX

Condition

ON

OFF

OFF

Combus is shorted / No clock / No data

ON

OFF

ON

Wrong data / Invalid Combus address 
(Too many modules)

ON

ON

OFF

Future Use

ON

ON

ON

Combus lines reversed (YEL and 
GRN)

Flash

----

----

Combus power is too low

12Vdc

Rechargeable Battery: 
12V 4Ah min

Disconnect the battery before 
replacing the fuse.

Combus

Digiplex/

Digiplex EVO 
series control 

panel

AUX switch:

Press to toggle the AUX output.

To metallic enclosure

Ground clamp

Cold water pipe 

grounding

AWG #14 single 

conductor solid 

copper wire

From 

transformer

Connect to another 

module compatible with 

transformer sharing

Transformer Sharing

Transformer Sharing: Use one transformer to power 
multiple modules with transformer sharing.

And / Or

To PGM output

External Negative Trigger

External Tamper 

Switch (N.C.)

PGM

Connected up to 300m 
(1000ft) away.

If the DGP-ACM12 loses 
communication with the 
reader, it will show up as a 
Module Fail to Com. 
trouble.

DGP-R915

Reader

ACM-12

1: RED

to

(+)

2: BLK

to

(-)

3: GRN

to

(D0)

4: YEL

to

(D1)

Only connect one reader per 
DGP-ACM12

DGP-R910 (not shown) is connected the same way

If you use a routing cable, use a 
shielded routing cable. Do not 
connect the routing cable’s shield to 
the reader’s shield. Only connect the 
routing cable’s shield at the DGP-
ACM12.

Connect

Reader

ACM-12

1: Red to

(+)

2: Black

to

(-)

3: Green

to

(D0)

4: White

to

(D1)

5: Brown

to

(Beep)

6; Orange

to

(RED)

7: Yellow

to

(GREEN)

CR-R880-BL

Only connect one reader per 
DGP-ACM12

CR-R885-BL (not shown) is connected the same way

Connected up to 152m 
(500ft) away.

When connecting the diode to the door lock, be 
sure to connect the cathode of the diode to the 
positive (+) voltage and the anode to the negative 
(-) voltage.

* = Follows control panel’s EOL definition.

** = If the door contact is not used, install a jumper or a 
1k

9

 resistor across the 

AUX

- and 

CT

 terminals 

depending on the control panel’s EOL definition.

*** = If the Request for Exit (REX) device is not used, 
place a jumper across the 

AUX

- and 

REX

 terminals.

Cathode

Anode

1N4007 

Diode

*** REX device must be 
connected to 

REX

 terminal

** Door contact 

must be 

connected to 

CT

 

terminal

No EOL required 
on REX

CONV4USB

DGP-ACM12

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