Wiring the MC4 Control Board
All of the GND terminals on the board may be used for the “ – “ power terminal or for a common
contact.
PLUG IN LOOP DETECTOR SLOTS/TERMINALS
The terminals at the top left corner of the MC4 board are for the termination of ground loops.
These terminals correspond with the 2 available plug-in loop detector slots. The loop detector
slots are available for use as a OPEN, REVERSE, CLOSE, RESET, and DISABLE
•
The RESET detector will provide a close contact to the controller after the the loop has
been activated and then deactivated. This is a good option for Anti-Tailgating and Quick
Close applications as it will override the Close Timer
•
The DISABLE option will allow the detector to still detect and consume power, but no
internal action will be taken by the MC4 board. This feature is great for troubleshooting
suspicious detectors or power draw concerns
14