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Description

TThe LF-DB-LI isolating base is intended for use with the LF-6100 Series detectors .The LF-DB-LI isolating base senses and isolates short circuit faults on LF-6100 loops and spurs. In short-circuit conditions the integral red LED is illuminated. The detector associated with the base remains active under short-circuit conditions. Power and signals to the affected section are restored automatically when the fault is cleared. Under normal operating conditions, a low impedance is present between the –IN and –OUT terminals of the base, so that power and signals pass to the next base in line .If a short-circuit or abnormal low impedance occurs, the fall in voltage is sensed and the base isolates the negative supply in the direction of the fault. The isolated section is tested using a current pulse every five seconds. When the short-circuit is removed, the power will automatically be restored.

FEATURES:

• Loop Powered

• Polarity Sensitive

• Isolates Short Circuit faults and spurs

• Red LED Indicator