This is the Apollo 45681-201 Series 65 Diode Base, designed for use with conventional systems that have manual call points and detector bases on the same circuit. This base is fitted with a schottky diode on the "L1 IN" and "L1 OUT" wiring terminals.
Please note: This base can only be used with compatible control equipment, and for many of the conventional smoke / heat detectors this base is a require item.
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