Apollo Marine DIN-Rail Dual Isolator -55000-770MAR

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Product Code
55000-770MAR
SKU
OXO00270
Brand
APOLLO FIRE DETECTORS
In stock
Available
Condition
New

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Apollo Marine DIN-Rail Dual Isolator -55000-770MAR The Marine DIN-Rail Dual Isolator provides, in one housing, two independent isolators which sense and isolate short-circuits on loops and spurs. This unit needs to be installed in a suitable enclosure (Part No. 29600-239/240) or equivalent and secured using the end stops. Operation The isolators are loop-powered and are polarity sensitive. A maximum of twenty detectors may be installed between isolators. When a short-circuit condition exists on either side of the isolator, the yellow LED is illuminated. Under normal operating conditions, a low impedance is present between the two negative terminals of each isolator channel so that power and signals are passed to the next base in line. If a short-circuit or abnormally low impedance occurs across the loop, the fall in voltage is sensed and the isolator isolates the negative supply in the direction of the fault. In this condition, the yellow LED of the affected channel will be illuminated. The isolated section of loop is tested using a current pulse every five seconds. When the short-circuit is removed the power will automatically be restored. Key Features Loop-powered Up to 20 detectors can be installed between isolators Allows fully isolated spurs

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