Tyco 4100U Appendix C: Checking System Wiring, Continued, Meter Readings, Circuit Type, Shielding

Appendix C: Checking System Wiring, Continued

Meter Readings	Table C-1 lists the correct meter readings for indicating appliances and initiating devices.
	Table C-1. Acceptable Zone and Signal Circuit Meter Readings
	Circuit Type	Meter Reading
	Class B/Style B Initiating Device (Zone) Circuit
	From zone + to zone – (each zone)	3.3 K Ohms
	From zone + to ground	Infinity
	From zone - to ground	Infinity
	Class A/Style D Initiating Device (Zone) Circuit
	From zone + to zone – (each zone)	Infinity
	From zone + to ground	Infinity
	From zone - to ground	Infinity
	From zone + OUT to + IN	Less than 50 Ohms
	From zone - OUT to - IN	Less than 50 Ohms
	Class B/Style Y Notification Appliance Circuit (each signal circuit)
	From + to ground	Infinity
	From - to ground	Infinity
	Resistance across circuit:
	In one direction	10 K Ohms
	In opposite direction	Less than 200 Ohms
	Class A/Style Z Notification Appliance Circuit (each signal circuit)
	From + to ground	Infinity
	From - to ground	Infinity
	From zone + OUT to + IN	Less than 50 Ohms
	From zone - OUT to - IN	Less than 50 Ohms
	Resistance across circuit:
	In one direction	Infinity
	In opposite direction	Less than 200 Ohms
	Shielding
	Shield to ground	Infinity
	Shield to -	Infinity
	Shield to +	Infinity
	MAPNET/IDNet II Loops (ZAMs and IAMs)
	From MAPNET/IDNet II + to ground	Infinity
	From MAPNET/IDNet II - to ground	Infinity

C-2