1 2 5 3 0 / 1 2 5 4 0 O W N E R ' S M A N U A L
P/N 447203 Issue I
V-29
Isolator Module (9160)
The 9180 (System Sensor M500X) addressable device circuit isolator module provides the circuitry to
automatically open and thus "isolate" a branch or section of an addressable device circuit. This isolation
will occur when the 9160 senses a short condition after its position on the circuit. By isolating the shorted
portion of the circuit the control unit will still be able to communicate with and monitor devices not involved
with the faulted section or branch of the addressable device circuit.
During normal operation the red scan/shorted LED will flash several times a minute. In the event that the
monitored portion becomes shorted the red scan/shorted LED will latch on steady and the associated
protected circuit portion will be automatically disconnected from the system and a defined trouble
condition will be reported to the control unit. Once the shorted condition has been removed the 9160
module will automatically unlatch thus restoring normal operations between it, its monitored circuit
portion, and the rest of the system.