4101-2 Controller Installation Handbook
14-2
A
Connections between Controller, Reading Head (Tx/Rx, LEDs
and Horn), Lock Strike, Door Monitor and Door Exit Control
can be made using 812 Cable - 3 x individually screened
twisted pairs and 9 x singles in one overall screen and sheath.
If you use the same colour/function relationship for all your
installations, debugging and upgrades will be much simplified.
We recommend the following convention:
Function Colour Function Colour
Tx Black/Red pair VA (+12V) Brown
Rx Black/White pair Lock Black/Green pair
Red LED Red 0V (common) Black
Green LED Green Door exit switch White
Amber LED Yellow Door mon switch Purple
Horn Orange Spare I/P Blue
RS232: 3-core overall screen, eg BELDEN 9533, maximum
length 15 metres.
RS485: screened dual twisted pair, 22AWG conductors, eg
BELDEN 8723, maximum length 1000 metres.
12V DC connection to 4910 Power Supply Unit: any 5A twin
cable. 12V/24V AUX DC connection to 4910 PSU: any 5A twin
cable. Tamper and Mains Fail connections to 4910 PSU: any
4-core cable.
PINpad: 10-core overall screened 22AWG (includes connections
to PINpad LEDs), eg BELDEN 9540, maximum length 300
metres.
If 812 Cable is not used for the connections to access points then
separate cables can be used as follows:
Transmit/Receive: dual screened twisted pair, 22AWG
(0.38mm
2
) conductors, eg BELDEN 8723, maximum length
300 metres.
LEDs, horn, door exit control (egress), door
monitoring and alarm inputs: any overall screened cable, eg
BELDEN 953X for 24AWG cable with X number of cores.
Lock Strikes: each requires a screened 2-core cable adequately
rated to carry the lock current, eg BELDEN 8760 has 18AWG
conductors and introduces about 2.0 ohms on a 50m run.
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