Smoke Alarm User Manual

Installation, Operation and Maintenance Manual
Issue 1 Page 8-11
February 2001
8.4.3 Replacing the Termination Board
When considering the following list of procedures to replace the termination board, it is assumed that the
lid has been removed from the Detector. Prior to removal of the termination board, download all data for
the Detector by use of the LaserNET software. However, should default settings apply, this operation is
unnecessary.
To remove the termination board from the Detector, proceed as follows:
(1) Remove the 24 V DC supply.
(2) Remove terminals from connectors TB1 and TB2 (containing the external connections).
(3) Remove connector from RJ12 PC connection.
(4) Remove connection to the detector head.
(5) Remove the FAN supply connection
(6) Remove the connection to either the blank facia status LED or the Display Module.
(7) Remove the screw located in the top right corner and then release the retaining clips.
(8) Remove the termination board from the Detector.
To fit a replacement termination board proceed as follows:
Remove the termination board from its packaging and carry out a visual inspection of the hardware.
The termination board is secured in position by the retaining clips and a screw that locates into a
mounting pillar in the top right hand corner.
Prior to powering up the Detector ensure that the following procedures have been completed:
(1) The termination board is secured correctly.
(2) The termination board is connected correctly.
The RS-485 network supports up to 127 unique addresses that are used to identify each zone of the
HSSD system. The hardware address on each termination board must be set for correct operation of the
communications network. Each termination board contains a DIP switch allowing the network address to
be set for each Detector.
If a replacement Detector is required to operate using the default settings no further action is necessary. If
however, the default settings are not used in a particular application then the Detector must be re-
configured using the LaserNET software. Configuration details are contained in the LaserNET Version 3
Software Manual.