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Low Voltage Occupancy Sensors: What Is The Operation Of Low Voltage Occupancy Sensors With The Auxillary Relay (-R) Option?

The auxiliary relay, available as an option on low voltage sensors (-R in the model number),  serves two purposes: 

1)  It is an isolated low voltage signal relay to provide contact closure to a third party device.

2)  When a low voltage sensor with auxiliary relay is tied to additional low voltage sensors (without auxiliary relays) via their white wire,  the the auxiliary relay  will sense the occupied state of the other sensors and close its relay due to occupancy at any sensor.

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