Bosch D129 User manual

Dual Class A Initiating Circuit Module
D129
en Installation instructions

Dual Class A Initiating Circuit Module Notices | en 3
Bosch Security Systems, Inc. Installation instructions 2020.04 | 04 | F.01U.362.295
1 Notices
These instructions cover the installation of the D129 Dual Class A Initiating Circuit module as
an interface to specified combined Burglary/Fire control panels for fire alarm and waterflow
alarm applications.
Install, test and maintain the module according to these instructions, NFPA 72, local codes,
and the authority having jurisdiction (AHJ). Failure to follow these instructions can result in
failure of a detector to initiate an alarm event. Bosch Security Systems, Inc. is not responsible
for improperly installed, tested or maintained devices.
Before installing the module, become familiar with the Installation and Operation Guide for
the control panel you are using.
!
Warning!
Follow these instructions to avoid personal injury and damage to equipment.
NFPA72 requires that you perform a complete system wide functional test following any
modifications, repair, upgrades or adjustments made to the system’s components, hardware,
wiring, programming and software/firmware.

4en | Description Dual Class A Initiating Circuit Module
2020.04 | 04 | F.01U.362.295 Installation instructions Bosch Security Systems, Inc.
2 Description
The D129 Dual ClassA Initiating Circuit module is a fire system interface to the control panels
listed in the table below for fire alarm and waterflow alarm applications. The module has two
ClassA circuits, each with a screwdriver adjustable Alarm Retard and Alarm Reset Delay. Use
the Alarm Reset Delay in waterflow applications. You can mount up to four modules inside the
control panel enclosure.
The ClassA circuit is four‑wire data expansion loop with a feed and return for both the
positive and negative sides of the loops. Unlike the two‑wire loops supervised by an
end‑of‑line (EOL) resistor, the ClassA circuits can detect an alarm condition with a single
open or ground fault in the circuit.
The following table lists control panels compatible with the D129:
Control Panels See section:
Active products:
GV41, GV32, and GV23 panels Wiring, page 8
Legacy*
D9412G, D7412G, D7212G**, D9412, D7412,
D7212** and D7212B1** panels
See control panel’s documentation on the
Bosch website (http://
www.boschsecurity.com)
D9112B1 and D9112 panels
D8112 panel
D7112 panel
1 GV4 = D9412GV4, D7412GV4, and D7212GV4** panels
2 GV3 = D9412GV3, D7412GV3, and D7212GV3** panels
3 GV2 = D9412GV2, D7412GV2, and D7212GV2** panels
* Legacy products were investigated to comply only to UL864 8th edition
** indicates products which are not UL listed for commercial fire applications

Dual Class A Initiating Circuit Module Description | en 5
Bosch Security Systems, Inc. Installation instructions 2020.04 | 04 | F.01U.362.295
Figure2.1: D129 Dual Class A Initiating Circuit Module
1, 2, 3,
4
Connectors for Loop B wiring 14 Loop A Reset Delay adjuster
5 ZoneB connection 15 Loop A Alarm Retard adjuster
6 +12VDC connection 16 Mounting holes
7 Earth Ground 17 D129 module (top view)
8 Common (-) connection 18 Loop B Reset Delay adjuster
9 ZoneA connection 19 Loop B Alarm Retard adjuster
10, 11,
12, 13
Connectors for Loop A wiring 20 D129 module (side view)

6en | Operation Dual Class A Initiating Circuit Module
2020.04 | 04 | F.01U.362.295 Installation instructions Bosch Security Systems, Inc.
3 Operation
3.1 Waterflow Alarm
When using waterflow switches without retard on a wet pipe sprinkler system, you can set
each module loop input with an Alarm Retard period to compensate for water pressure surges.
Notice!
For all other types of fire alarm applications, set the Alarm Retard to zero.
3.2 Alarm Retard and Reset Delay
When using Alarm Retard, set the Reset Delay time at a time interval approximately 50%
longer than the Alarm Retard period to ensure an alarm is generated in case of alarm valve
fanning. The Reset Delay progressively shortens the Alarm Retard cycle when the sprinkler
loop continuously alternates between alarm and restoral.
Setting the Alarm Retard
Notice!
Only use the Alarm Retard for wet pipe sprinkler systems using waterflow switches without
retard. For all other applications, adjust the Alarm Retard to zero (fully counterclockwise).
1. For each input loop requiring Alarm Retard, use a screwdriver to set an appropriate
retard time for that loop. Fully clockwise represents a maximum retard time of
approximately 90 seconds.
2. When using the Alarm Retard, set the Reset Delay to compensate for alarm valve fanning
conditions.
3. Test the Alarm Retard period and the Reset Delay.

Dual Class A Initiating Circuit Module Installation | en 7
Bosch Security Systems, Inc. Installation instructions 2020.04 | 04 | F.01U.362.295
4 Installation
Mount the module inside the control panel enclosure using the supplied screws. You can also
use the D137 Mounting Bracket to mount the module inside the enclosure. For mounting
instructions using the D137, see the D137 Installation Instructions.
Notice!
The module must be mounted in a fire-rated enclosure such as the D8109.
An external power supply listed for fire signaling units and commercial or residential burglary
units can be used.
The external power supply must be UL864 Listed, regulated, and power‑limited.
Install the control panel and external power supply in the same room no more than 20ft (6m)
apart. The interconnecting wires between the control panel and external power supply must
be in conduit.
The power source for both the auxiliary power supply and the control panel must be from the
same dedicated AC branch circuit.

8en | Wiring Dual Class A Initiating Circuit Module
2020.04 | 04 | F.01U.362.295 Installation instructions Bosch Security Systems, Inc.
5 Wiring
Use the table below to ensure you are using the proper wire size for the length of the circuit:
Maximum circuit length Wire size (AWG and ISO metric)
60ft 18m) 22AWG (0.34mm2)
160ft (48.75m) 18AWG (0.75mm2)
5.1 Wiring a GSeries (GV2 or higher) panel to supply 12VDC
power to the D129
Figure5.1: Wiring a D129 module with power supplied by the GSeries control panel
1 D129 module 6 Earth Ground
2 Loop A (4‑wire ClassA) 7 ZoneB connection
3 Loop B (4‑wire ClassA) 8 +12VDC aux power connection
4 ZoneA connection 9 GSeries panel
5 Common connection

Dual Class A Initiating Circuit Module Wiring | en 9
Bosch Security Systems, Inc. Installation instructions 2020.04 | 04 | F.01U.362.295
5.2 Wiring a GSeries (GV2 or higher) panel to a D129 with 12VDC
supplied by an external power supply
Figure5.2: Wiring a G Series panel to a D129 module with 12VDC supplied by an external power supply
1 D129 module 7 ZoneB connection
2 External power supply 8 +12VDC from external power supply
3 Loop A (4‑wire ClassA) 9 Loop B (4‑wire ClassA)
4 ZoneA connection 10 GSeries panel
5 Common connection 11 Wiring from external power supply to
control panel enclosure must be in
conduit.
6 Earth Ground

10 en | Programming Dual Class A Initiating Circuit Module
2020.04 | 04 | F.01U.362.295 Installation instructions Bosch Security Systems, Inc.
6 Programming
On the GV4, GV3, and GV2 panels for waterflow alarm installations where the control panel
provides the only means for operating a local sprinkler warning bell, use Point Index2 from
the default program. This point index is programmed to:
– Ring the bell until restored,
– Buzz on Fault, Fire Point,
– have a trouble condition on an open, and
– have an alarm on a short.
To silence the bell while there is still a waterflow condition use Point Index2 from the default
program, except turn Ring Until Restored to NO.