I'm having trouble figuring out the type of sensors I have ( N.O. or N.C. ) Each zone has a 15K resistor from the loop power to the zone.
The wireless receiver has 2 wires running to it to supply 12 Volts and each zone has
1 wire running back to the zone screw where the 15K resistor is attached so that the 15K is always supplying a little power to the zone screw. When the zone is tripped the wire from the wireless receiver becomes a ground for that zone. So the power flows from the loop power through the resistor, then through the now grounded wire.Would this be a N.O. or N.C. circuit?
Thanks,
John snipped-for-privacy@adelphia.net