Installation manual

Cable Routing / Requirements
The minimum cable type to be used for detection devices, sounders and
Keypad and Door Station connections should be 6-core alarm cable
(7/0.2mm). This has a resistance of 8 ohms per 100 metres. Screened
cables are preferred for Keypads, Door Stations and each one run from
the panel separately. Use spare cores to double-up the 12V power
supply cables to the each control station to reduce circuit resistance and
further improve current performance.
Ensure that all RS485 communication lines and detection circuit cables
are kept away from mains supply cables. Comfort’s enclosure is
designed with the Engineer in mind. Large plastic inserts called
‘mublicons’ allow large gauge trunking to be brought to the panel in
four locations. Extensive rear access is also possible using the many
entry holes in the backplate. Various mounting positions are provided
for LEM’s, Relay Boards and Ringer Board.
Screened cable is essential where system wiring is to be run adjacent to
cables that produce RFI or are switching high-current loads. When using
screened cable connect the screen to earth at the Comfort Panel end
ONLY using the supplied anchor posts shown below. At the keypad end,
just cut the screen short and insulate.
N L
TW7223
Interface
position
Transformer
Relay Board
Positions
Alternative
Ringer Position
Standby battery
7.0 Ah
Spade connector
for earth to front
cover
Main CPU
PCB
Usual Ringer
Position
Alternative
LEM Position
Usual LEM
Position
Panel
Tamper
Switch
Cable Entries
Cable Entry Cable Entry
Wall Fixing
Point
Wall Fixing
Point
Wall Fixing
Point
Wall Fixing
Point
Screened
anchor posts
FUSE
Comfort Installation Manual
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