* Single voltage-free relay output.

* Output relay can be powered internally or externally (selectable at installation)

* Single input for connection to dry contact inputs Monitors and signals three distinct input states.

* Normal; Alarm; Open-circuit.

* Separate indicators for Quiescent, Alarm and Fault conditions.

* Polling indicator shows quiescent operation.

* DIP switch address setting.

* 126 usable detector address settings per loop.