The Zone Monitor with Isolator is factory preset to return an analogue value of 16 when all detectors on the zone are in quiescent state and 64 when a detector changes to the alarm state. The Zone Monitor with Isolator latches in the alarm state.
A 5.1kΩ end-of-line resistor is fitted to detector cables for open-and short-circuit faults. Alternatively, an active end-of-line monitor may be used in conjunction with diode bases and a capacitor of up to 50μF fitted at the Zone Monitor with isolator wiring terminals.
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