·    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
·    DC 24 V operation
·    DIP switch address setting
·    125 usable detector address settings per loop