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At the heart of the system is the Main Control Box with its integral 2 amp power supply. From this a single 5 core cable connects the data and power to the first Door Supervisor Module. This Module collects data from the Call and Release switches, the door contact and the door strike It also provides outputs to activate the door strike and illuminate the Call and Release LEDs. Outputs to the door strike are protected by a thermal fuse which will protect against over current and will automatically reset when the overload is removed.
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