MD 9870 - Timer unit
MD9870 Timer Unit allows isolating some fire detectors installed in working areas where performed operation may activate fire alarm.
No alarm condition will be showed during the set time. Led ACTIVE displays the Timer Unit activity.
If a Timer Unit mechanical fault occurs, the fire detection control unit automatically re-connects the isolated detectors when 120 minutes time limit is exceeded.
MD9870 is connected on the detection loop and no auxiliary power is needed.
A glazed door protects device from dampness and accidental activation.