Specifications

C•CURE apC/L Technical Manual
Connecting the apC/L Relay Outputs
2-9
Connecting the apC/L Relay Outputs
This section describes how to connect the apC/L to relay outputs. It also
describes connecting the unit to the host computer.
Connecting Relay Outputs
Pins for apC/L relays are arranged in groups of three on the lower right side
of the board.
The pins are labeled COM (Common), NC (Normally Closed), NO
(Normally Open). Use twisted, 18 AWG (0.902 mm) Belden #8461 or
twisted 22 AWG (0.357 mm) Belden #8442 for wiring of all relay outputs.
When using an apC/L relay for controlling a DC door strike or for driving a
secondary relay, you must install a diode (Motorola diode type #1N4933 or
equivalent) across the strike or relay to suppress noise.
When using a relay for controlling an AC door strike, you must install a
MOV (World Products, Inc. part # SNR-D56K2 or equivalent) across the
strike to suppress noise.
Figure 2.1 illustrates the diode and MOV installations for door strikes.
Voltage
Resistive Inductive
30VDC 2.0A 1.0A
125 VAC 0.4A 0.2A
CAUTION
Maximum relay contact voltage is 30V AC or DC.
Do not use apC/L relays to switch power, because this
may exceed the ratings for the relay contacts. Use a
secondary switching relay instead. All secondary relays
must have a diode or MOV connected for proper
suppression as shown in Figure 2.1.
apcl.bk Page 9 Monday, May 15, 2000 3:21 PM