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Bosch Security Systems, Inc.

130 Perinton Parkway

Fairport, NY 14450

USA

www.boschsecurity.com

© 2016 Bosch Security Systems, Inc.   

F.01U.265.456 | 06 | 2016.05

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/.

Dimensions

2.5 in x 3.8 in x 0.60 in 

(63.75 mm x 96 mm x 15.25 mm)

Voltage 

(operating)

12 V nominal

Current 

(maximum)

35 mA

Operating 

temperature

+32°F to +122°F (0°C to +50°C)

Relative 

humidity

5% to 93% at +90°F (+32°C) non-

condensing

Loop inputs

Up to eight inputs. Input contacts may be 

Normally Open (NO) or Normally Closed 

(NC). 

NOTICE! 

Normally Closed (NC) is not 

permitted in Fire installations.

Loop End-of-

Line (EOL) 

resistance

1 kΩ, 2 kΩ, No EOL (Dual 1 kΩ + 1 kΩ)

Loop wiring 

resistance

100 Ω maximum

Loop states 

(Single EOL 

resistor 

circuit style)

Short: 0 - 1.1 VDC

Normal: 1.25 - 1.9 VDC

Open: 2.25 - 5 VDC

Terminal 

wire size

12 AWG to 22 AWG (2 mm to 0.65 mm)

SDI2 wiring

Maximum distance - Wire size (Unshielded 

wire only): 

1000 ft (305 m) - 22 AWG (0.65 mm)

1000 ft (305 m) - 18 AWG (1.02 mm)

Compatibility B9512G/B9512G-E

B8512G/B8512G-E

B6512

B5512/B5512E 

B4512/B4512E

D9412GV4

D7412GV4

D7212GV4

(Refer to the control panel installation

document for number of supported

devices.)

7 | Specifications

8 | Point number examples

6 | Certifications

Region

USA

UL 365 - Police Station Connected Burglar Alarm 

Units and Systems 
UL 609 - Local Burglar Alarm Units and Systems  
UL 636 - Holdup Alarm Units and Systems  
UL 864 - Control Units and Accessories for Fire 

Alarm Systems (Commercial Fire)  
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 Mar-

shall  
FCC Part 15 Class B 
FDNY - Fire Department of New York  
FM 3010 - Fire Alarm Signaling Systems  

Canada

CAN/ULC S303 - Local Burglar Alarm Units and 

Systems  
CAN/ULC S304 - Signal Receiving Centre and 

Premise
ICES-003 - Information Technology Equipment 

(ITE)
ULC-ORD C1023 - Household Burglar Alarm 

System Units  

ULC-ORD C1076 - Proprietary Burglar Alarm 

Units and System  

When the tamper switch is activated, the heartbeat LED 

stays OFF for 3 seconds before indicating the firmware 

version. The LED pulses the major, minor, and micro digits of 

the firmware version, with a 1 second pause after each digit.
In the following example, the version 1.4.3 shows as LED 

flashes:

[3 second pause] 

*___****___***

 [3 second 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 tamper pins.
Refer to 

Figure 5.1 

for an example of flash pattern

s. 

5 | Show the firmware version

Figure 5.1: Firmware LED flash patterns

4 | LED descriptions

The module includes one blue heartbeat LED to indicate 

that the module has power and to indicate the module’s 

current state. Refer to 

Table 4.1

.

Flash Pattern Function

Flashes once 

every 1 sec

Normal state: Indicates normal operation 

state.

3 quick flashes 

every 1 sec

Communication error state: Indicates 

(the module is in a “no communication 

state”) resulting in an SDI2 

communication error.

ON Steady

LED trouble state: Module is not 

powered (for OFF Steady only), or some 

other trouble condition prohibits the 

module from controlling the heartbeat 

LED.

OFF Steady

Table 4.1: LED descriptions

3.4 | Sensor loop wiring

Wire resistance on each sensor loop must be less than 100 

Ω with the detection devices connected. The terminal strip 

supports 12 to 22 AWG (0.65 to 2 mm) wires.

The B208 detects open, short, normal, and ground fault circuit 

conditions on its sensor loops and transmits the conditions to 

the control panel. Each sensor loop is assigned a point number 

and transmits to the control panel individually. Run wires 

away from the premises telephone and AC wiring. For the 

1 kΩ dual EOL resistor circuit style order ICP-1K22AWG-10, a 

package of 10 1.0 kΩ EOL resistors.

Point

COM

1.0 k

NC

NO

5

3

1.0 k

1.0 k

Point

COM

NC

4

2

1

Figure 3.5: Sensor loop wiring single (upper) and dual (lower)

Callout ― Description

1 ― Point sensor loop terminals
2 ― Normally closed device (contact)
3 ― 1 kΩ resistor at device

4 ― 1 kΩ resistor at end-of-line (EOL)
5 ― Normally open device (contact)

Dual EOL requires B208 firmware v1.05.001 or higher. Dual 

EOL meets the requirement of double protection for medium to 

high risk ULC installations.

For B208 address 

01

 the point numbers for the input devices are 

11 through 18: 

Terminal no

1

2

3

4

5

6

7

8

Input no

11

12

13

14

15

16

17

18

For B208 address 

11

 the point numbers for the input devices are 

111 through 118: 

Terminal no

1

2

3

4

5

6

7

8

Input no

111 112 113 114 115 116 117 118

en

   Installation Guide

Octo-input Module

B208

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