C•CURE® 800/8000 9.4 apC/8X Technical Manual - Tyco Security ...

Wiring for Relay Outputs
Wiring for Relay Outputs
To the apC/8X, an output is a virtual concept; that is, an output does not have
to actually exist, but must be defined to the apC/8X. Relays on the apC/8X
are a physical representation of an output.
• Pins for eight apC/8X relays are arranged in groups of three on the right
side of the main board.
• On the standard star coupler, the eight relays are organized along the left
side and the top.
• The Wiegand/proximity star coupler and the Mini Star Coupler do not
include outputs.
Relay pins are on both the left and right sides of the R/48 module. The pin
orientations differ depending on which side of the apC/8X or apC module the
relay is on. The pins are labelled COM, NC, and NO for common, normally
closed, and normally open. They are arranged so you can move a relay
connector from one side of the board to the other without rewiring the
connector. Use twisted, 18 AWG (0.902 mm) Belden #8461 or twisted 22
AWG (0.357 mm) Belden #8442 for wiring all relay outputs. For FCC Class
B installations, you must use shielded wiring for relay outputs.
Caution: Do not use apC/8X relays to switch power for a magnetic
lock, which exceeds the ratings of the relay contacts shown in
Figure B.13. Use a secondary switching relay instead. All door lock
relays must have a diode or MOV connected.
If you are using a relay for a DC locking mechanism or for driving a
secondary relay, you must install a diode (Motorola diode type #1N4933 or
equivalent) across the lock or relay to suppress noise.
When using a relay for an AC door lock or for driving a secondary relay, you
must install a MOV (World Products, Inc. part #SNR-D56K2 or equivalent)
across the strike or relay to suppress noise. Figure B.13 illustrates the diode
and MOV installations for door locks.
B-20 apC/8X Technical Manual