NGA-IDB has been designed to provide protection against short circuit faults on Nortech Addressable Fire Alarm system. The isolator protects the loop in the event of a short circuit by disconnecting the section of the loop where the short circuit has occurred. When the fault has been rectified, the isolating circuitry reconnects the affected part of the System.

The Yellow LED is provided to indicate there is a short circuit in the loop. NGA-IDB is polarity sensitive and can be damaged if connected with reverse polarity. Please be sure to note the polarity indicated at the wiring terminals. Up to 32 devices may be fitted between each isolator (EN54) or 20 devices for BS5839 compliance.