Bosch D185 Installation Manual
Reverse Polarity Signaling Module
D185
en Installation Instructions
!
Reverse Polarity Signaling Module Notices | en 3
1
2
Notices
These instructions cover the installation of the D185 Reverse Polarity Signaling Module in a
fire system supervised by a fire alarm control panel (FACP) or a combination Burglary/Fire
control panel.
Before installing the module, become familiar with the Installation and Operation Guide for the
control panel you are using.
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.
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.
Description
The D185 Reverse Polarity Signaling Module connects a control panel with either a single set
or a pair of leased telephone company (telco) lines in NFPA 72 remote station applications.
The module’s three input terminals accept alarm, trouble, or supervisory input from the
control panel, and the module transmits this information to a monitoring station after a built-in
20±5 sec) delay. This module operates with either a 12 VDC or 24 VDC supply. All circuits are
power limited.
The module can be used with the Bosch Security Systems, Inc. control panels indicated in the
following table. You can also use the module with non-Bosch, UL Listed control panels where
it is referenced as compatible in the control panel's installation instructions.
Control panels
Active:
FPD-7024 panel D275, PAM-4 Wiring to an FPD-7024 FACP,
G Series (GV2 and higher)
1
panels
Legacy:
D7024 panel See control panel documentation on the Bosch website
G Series (prior to GV2)
2
panels
D9412, D7412, and D7212**
panels
DS9400 panel*
Bosch Security Systems, Inc. Installation Instructions 2013.05 | 03 | F.01U.034.781
Compatible relays See section:
page 7
D275, PAM-4 Wiring to a G Series control
panel, page 8
(http://www.boschsecurity.com)
4 en | Notices Reverse Polarity Signaling Module
Control panels Compatible relays See section:
1
G Series (GV2 or higher) = GV4 (D9412GV4, D7412GV4, and D7212GV4**), GV3
(D9412GV3, D7412GV3, and D7212GV3**), and GV2 (D9412GV2, D7412GV2, and
D7212GV2**) panels
2
G Series (prior to GV2) = D9412G, D7412G, and D7212G** panels
* Legacy products were investigated to comply only to UL864 8th edition
** indicates products which are not UL listed for commercial fire applications
Figure 2.1: D185 reverse polarity signaling module
1 Input terminals 10 Connects to telco line for sending
2 Earth Ground 11 Connects to telco line for sending
3 Common 12 Connects to telco line for sending
4 Connects to control panel Aux or
external power supply (12 VDC or
24 VDC)
5 Connects to Trouble Relay on control
panel
6 Connects to Supervisory Relay on
control panel
7 Connects to Alarm Relay on the control
panel
8 Output terminals 17 Alarm Test LED
supervisory signals
alarm\trouble signals
alarm\trouble signals
13 Not used
14 Connects to end-of-line (EOL)
supervisory relay (such as, D275,
PAM‑4)
15 Alarm signal adjuster
16 Supevisory signal adjuster
9 Connects to telco line for sending
18 Alarm Test switch
supervisory signals
2013.05 | 03 | F.01U.034.781 Installation Instructions Bosch Security Systems, Inc.
Reverse Polarity Signaling Module Notices | en 5
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3.1
Operation
Under normal conditions, the module sends a steady 10 mA of current to the alarm telco
outputs and 14 mA of current to the supervisory output which connects to a monitoring
station. In an alarm or supervisory condition, the module reverses the output current polarity
and signals a trouble condition by interrupting the output voltage and current.
Input Output
Alarm Supevisory Trouble Alarm Supervisory
No Current No Current No Current Normal Normal
No Current No Current Active High No Current Normal
No Current Active High No Current No Current Reversed Polarity
No Current Active High Active High No Current Reversed Polarity
Active High No Current No Current Reversed Polarity Normal
Active High Active High No Current Reversed Polarity Reversed Polarity
Active High Active High Active High Reversed Polarity Reversed Polarity
Table 3.1: Input and output states
Alarm and trouble responses (alarm output telco lines)
3.2
3.3
4
The module responds to an alarm input from the control panel by reversing the alarm telco
output polarity. The module responds to a trouble input from the control panel by interrupting
the current to the alarm telco outputs
If the control panel sends an alarm during a trouble signal, the module overrides the trouble
telco output and responds with an alarm telco output (reversed polarity).
Supervisory response (supervisory output telco lines)
The module responds to a supervisory signal input by reversing the polarity of the supervisory
telco outputs. A second set of telco lines must be connected.
Alarm test
The Alarm Test Switch (Item 18 in Figure 1 on page 2) disables module output during testing
that triggers a trouble output from the module during testing. Generally, this switch is off but
during an Alarm Test, you must move the switch to the ON position. Turning on the Alarm Test
Switch lights the Alarm Test LED (Item 17 in Figure 1).
Installation
Notice!
Install the module within 20 ft (6 m) of the control panel with a minimum of 22 AWG
(0.34 mm2) wire. Ensure all wiring is in conduit.
Install the D185 in a system by:
Bosch Security Systems, Inc. Installation Instructions 2013.05 | 03 | F.01U.034.781
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