The Series 65 Standard Relay Base provides one set of volt-free changeover (from C) contacts that change state when the detector signals an alarm.
The bases have been designed to enable detectors to be plugged in without any need for force - particularly useful when fitting to suspended ceilings. All Series 65 bases are lockable. The standard base is identical to the Series 60 base, so uses the same part number, 45681-200. It contains no electronic parts which could be damaged during installation.