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The DoorKing 4404-012 Replacement Control Board is a genuine PCB designed for DoorKing gate operator models 9210
With compatibility across multiple LiftMaster and Multi-Code systems
Whether for a single gate or a multi-access facility
Dual Relay Outputs: Manage multiple devices with independent relays (5 Amp and 1 Amp capacities)
Compatibility: Designed for Eagle 100 and Eagle 200 gate operators
Doorking 1878-010 Low Voltage Surge Suppressor presence-sensor The DoorKing 4404-012 Replacement ControlSurge Protection for Low Voltage Access Control Wiring The Doorking 1878 010 is a voltage surge suppressor designed to protect low voltage lines from transient spikes and surges that can damage sensitive access control electronics. Installed between input and output terminals, this board helps safeguard keypads, card readers, intercoms, and other low voltage components from electrical disturbances caused by lightning or power fluctuations. Key
