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For garage door whats better n/c or n/o wiring?


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You want your contacts to be open (N/C) when the magnet and switch are in close proximity to each other


When the garage door opens the contacts will then close and the sensor light on the IOLinc will light.



This is the opposite of standard alarm wiring which triggers when the circuit is broken, i.e. a wire is cut or a door is opened.


In short, the ISY works best with a N/C wired switch.

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