The diode base is designed for use with conventional systems that have manual call points and detector bases on the same circuit and where correct functioning of call points is required even when one or more detector heads have been removed.

The base is fitted with a schottky diode on the "L1 IN" and "L1 OUT" wiring terminals. This base can only be used with compatible control equipment.

The bases have been designed to enable detectors to be plugged in without any need for force and have a "one way only" fit.