9752 Installation Guide 3. Installation
497098 Issue 3 Page 35
Fitting a Plug-by Communicator
The control unit can be fitted with a communicator or speech dialler (for
example, the Scantronic 8400, 8440, 660 or RedCare STU). Figure 27 shows
the connections for the communications wiring harness.
Comms O/P1 (Brown) -ve applied (+ve removed) in alarm
Comms O/P2 (Orange) -ve applied (+ve removed) in alarm
Comms O/P3 (Yellow) -ve applied (+ve removed) in alarm
Comms O/P4 (Green) -ve applied (+ve removed) in alarm
Comms O/P5 (Blue) -ve applied (+ve removed) in alarm
Comms O/P6 (Purple) -ve applied (+ve removed) in alarm
Comms O/P7 (White) -ve applied (+ve removed) in alarm
Comms O/P8 (Grey) -ve applied (+ve removed) in alarm
Line Fail input (White/Brown) +12V applied to indicate telephone line fail
Tell Back input (White/Orange) +12V applied to change from engineer to customer reset
0V (Black)
12V (Red)
Com Connector Cable, Part No. 485210
Figure 27. Plug-By Communicator Wiring
Note: Comms O/P4 will be active when the system is unset. This is normal, as
a system being unset is equivalent to an alarm signal.
To fit a communicator, follow the instructions below.
Caution: Follow the instructions in the order shown, or you may damage
the control unit and/or communicator.
1. Disconnect mains and battery power from the control unit and remove
the case lid, if the system has already been installed.
2. Make any necessary connections from the communicator to the
communication wiring harness. The default is a positive voltage when the
output is inactive but this can be inverted if required using Command
159.
3. Plug the Communication Wiring Harness onto the communications
connector on the main PCB.
If the system has already been installed:
4. Re-connect the battery.
5. Fit the case lid.
6. Apply mains power.
7. Test communicator operation.
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