Contact Sensors

Selecting	To monitor circuits that have no voltage potential of their own,
sensors	you can use any normally open (NO) or normally closed (NC)
	dry contact sensors. These sensors include:
	•	Magnetic contact switches
	•	Window foils
	•	Tamper switches
	•	Heat detectors
	•	Water sensors
	•	Pressure sensors
	Note: Connecting sensor inputs to circuits other than dry
		closure circuits voids the warranty and may damage to
		the unit.
	To monitor sensors that require power, the Environmental
	Monitoring Unit provides 12 VDC at up to 60 mA at pins 1 and
	2 of the Sensor Zones connector. These sensors include:
	• Passive infrared (body heat) detectors
	•	Smoke sensors
	•	Photo relay detectors
	For more information on types of sensors you can use with the

unit, call APC Customer Support at a number listed on the back cover of this manual.

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