Compact systems use a 12V DC switched voltage to provide an output for a lock. This is not suitable in situations where volt free contacts are required for controlling external equipment, such as roller shutters or 24v locks. The compact relay module has been designed to be connected across this output (Green / Yellow wires) and provide switched (NO / NC) volt free contacts. Features Use with compact systems Provides 1 pair of volt free contacts Use to control external equipment
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