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24VDC Power for 4-Wire Sensor on Elk System?


New Member
Is it possible to power 4-wire sensors (motion detectors, glass breaks) on a 24VDC circuit, while connecting the switch/alarm circuit to an Elk M1G (which I beleive is 12VDC)?
I'm assuming the Elk is powering the switched circuit, and that the power circuit for the 4-wire sensor power is independant of the switch circuit. But, you know what they say about assuming so I thought I better ask.


Senior Member
For most 4-wire sensors, like motion and glass break detectors,, the alarm contact is separate from the power - it's just a simple relay contact. So yes, you could provide 24V power from a separate supply, and just connect the sensor contact to the panel's zone inputs.