The RL-8 is an 8-relay (reed type) "open collector to dry contact" adapter, designed as an interface unit between the outputs of the MCR-308 wireless receiver and alarm control panel zone inputs.
Similarly, the RL-8 can serve as a suitable output interface for other electronic security devices that have open-collector outputs. Operating power for the RL-8 is obtained from the same source that supplies input voltage to the MCR-308.
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