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Bosch Security Systems, Inc.

130 Perinton Parkway

Fairport, NY 14450

USA

www.boschsecurity.com

© 2017 Bosch Security Systems, Inc.   

F.01U.300.416 | 10 | 2017.01

Bosch Sicherheitssysteme GmbH

Robert-Bosch-Ring 5

85630 Grasbrunn

Germany

Copyright

This document is the intellectual property of Bosch Security Systems, Inc. and 

is protected by copyright. All rights reserved.

Trademarks

All hardware and software product names used in this document are likely to be 

registered trademarks and must be treated accordingly.

Bosch Security Systems, Inc. product manufacturing dates

Use the serial number located on the product label and refer to the

Bosch Security Systems, Inc. website at 

http://www.boschsecurity.com/datecodes/.

8 | Specifications

Dimensions

2.9 in x 5.0 in x 0.6 in (73.5 mm x 127 mm x 15.25 

mm)

Voltage (input)

12 VDC nominal

Current

Standby: 110 mA + reader current

Alarm: 110 mA + reader current

Alarm output

Form C relay (NC, COM, NO) at 12/24 V @ 2.0 A

Operating

temperature

0°C to +50°C (+32°F to +122°F)

Relative humidity

5% to 93% at +32°C (+90°F) non-condensing

Terminal wire size

18 AWG to 22 AWG (1.02 mm to 0.65 mm)

SDI2/SDI wiring 

to B901 + Reader 

with external power 

supply

Maximum distance - wire size (unshielded wire only): 

1000 ft (305 m) - 22 AWG (0.65 mm), 2500 ft (762 m) 

- 18 AWG (1.02 mm)

SDI2/SDI wiring to 

B901 + Reader from 

control panel

175 ft (53 m) - 22 AWG (0.65 mm), 450 ft (137 m) - 

18 AWG (1.02 mm)

Wiring distance from 

B901 to Reader

200 ft (61 m) - 22 AWG (0.65 mm), 500 ft (152 m) - 

18 AWG (1.02 mm) Reader dependant

Bosch compatible

control panels

B9512G/B9512G-E/B8512G/B8512G-E/B6512/

D9412GV4/D7412GV4/D9412GV3/D7412GV3/

D9412GV2/D7412GV2/D9412G/D7412G  

(Refer to the control panel installation document for 

the number of supported devices.)

Bosch compatible

readers and

accessories

ARD-AYH12 EM Prox Wall Mount

ARD-AYJ12 EM Prox Mullion

ARD-AYK12 EM Prox Mini Mullion

ARD-AYQ12 EM Prox Wall Mount Vandal Resistant

ARD-AYCE65B EM Prox or PIN Mullion

ARD-R10 HID iClass Mini Mullion

ARD-R40 HID iClass Wall Mount

D8223 HID Prox Wall Mount

D8224 HID Prox Mullion

D8224-SP HID Prox Switch Plate Mount

D8225 HID Prox Mini Mullion

D8229 PIN Reader

Bosch compatible

credentials

ACA-ATR13 EM Tokens*

ACD-ATR11ISO EM Cards*

ACD-ATR14CS EM Clamshell Cards

ACD-IC2K26-50 iClass Cards**

ACT-IC2K26-10 iClass Tokens**

D8236-10 HID Prox Cards***

D8236KF-10 HID Prox Tokens***

* EM cards work with EM readers, ** iClass cards work with iClass readers,

*** Prox cards work with Prox readers

Approved For

Level Comment

Destructive Attack

I

Line Security

IV

IP or cellular with encryption

Line Security

II

IP or cellular without encryption

Line Security

I

B430/PSTN

Endurance

IV

Send by Power

IV

7 | Certifications

Region Certification

USA

UL 294 - Access Control System Units
UL 365 - Police Station Connected Burglar Alarm Units and 

Systems
UL 609 - Local Burglar Alarm Units and Systems
UL 864 - Control Units and Accessories for Fire Alarm Systems
UL 985 - Household Fire Warning System Units
UL 1023 - Household Burglar-Alarm System Units
UL 1076 - Proprietary Burglar Alarm Units and Systems
UL 1610 - Central Station Burglar Alarm Units
CSFM - California Office of The State Fire Marshal
FCC Part 15 Class B

CA

Canada CAN/ULC S303 - Local Burglar Alarm Units and Systems
CAN/ULC S304 - Signal Receiving Centre and Premise Alarm 

Control Units
ULC-ORD C1023 - Household Burglar Alarm System Units
ULC-ORD C1076 - Proprietary Burglar Alarm Units and Systems
ULC 2016701-S1871E - Fire Alarm and Security Subassemblies
ICES-003 - Information Technology Equipment (ITE)

When the tamper switch is activated, the heartbeat LED stays OFF 

for 3 sec before indicating the firmware version. The LED pulses the 

major, minor, and micro digits of the firmware version, with a 1 sec 

pause after each digit.
In the following example, the version 1.4.3 shows as LED flashes:

[3 sec pause] 

*___****___***

 [3 sec pause, then normal operation].

To show the firmware version using an LED flash pattern: 

-   If the optional tamper switch is installed: 

With the enclosure door open, activate the tamper switch (push and 

release the switch).

-   If the optional tamper switch is NOT installed: Momentarily short 

the T+ terminal.
Refer to 

Figure 6.1 

for an example of flash patterns.

 

6 | Show the firmware version

Figure 6.1: Firmware LED flash patterns

5 | LED descriptions

The module includes one blue Heartbeat LED, and one Reader 

LED. The Heartbeat LED indicates that the module has power as 

well as a module’s current state. The Reader LED indicates data 

transmission. Refer to 

Table 5.1

.

Flash Pattern

Function

Flashes once 

every 1 sec

Normal state: Indicates normal operation 

state. (blue)

ON Steady

LED trouble state: Module is not powered 

(for OFF Steady only), or some other 

trouble condition prohibits the module from 

communicating with the control panel.

OFF Steady

Flashes rapidly

Card data is executing (yellow)

OFF Steady

No card data is being received

Table 5.1: LED descriptions

4 | Configuration

3.8 | Wire to door contact

  ZN+    RT

E
COM  REX 

 

2

1

Callout ― Description

1 ― RTE device
2 ― B901 Access Control Module

Figure 3.7: Wiring the door contact

  ZN+    R

TE
COM  REX  

3

1

2

Callout ― Description

1 ― Door Contact
2 ― 1k EOL
3 ― B901 Access Control Module

Figure 3.8: Wiring the RTE

NOTICE!

Firmware reprogramming on the B901 is not supported if 

connected via the SDI bus. Updating the firmware is achieved 

via the SDI2 connection only.

Wire the door contact

.

3.8.1 | Request to Enter (RTE)

Wire the Request to Enter (RTE) device. The strike is activated, and 

the door point is shunted when RTE is momentarily shorted to COM. 

The 

Shunt only

 

option shunts the point when this input is momentarily 

shorted. To activate the shunt but not the strike, program RTE Shunt 

Only? as [YES].

3.8.2 | Request to Exit (REX)

After you wire the module, power up the system and configure the B901 

using Remote Programming Software (RPS) to assign the module to 

an  assigned area. Whenever possible, be consistent when numbering 

doors, areas, and keypads. For example, assign Door 1 to Area 1 and 

keypad 1. Test for proper operation.

Figure 3.9: Wiring the REX

  ZN+    R

TE
COM  REX  

1

2

Callout ― Description

1 ― REX device
2 ― B901 Access Control Module

Wire the Request to Exit (REX) device

.

The strike is activated, and the door point is shunted when REX is 

momentarily shorted to COM. The 

Shunt only

 option shunts the point 

when this input is momentarily shorted. To activate the shunt but not 

the strike, program REX Shunt Only? as [YES].

NOTICE!

Do not use a Request to Exit device (REX) for emergency 

exit applications. NFPA 101 requires that a UL Listed panic 

device be used to provide direct power from the standby 

power source. Check with your local Authority Having 

Jurisdiction (AHJ) prior to installing your system.

en

   Installation Guide

Access Control Interface Module

B901

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