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The SDC - SECURITY DOOR CONTROLS 400U-RMB is a plate with integrated buzzer designed for use as a lock accessory in access control and door security applications. This component provides an audible alert function combined with a mounting plate, supporting door control systems where both mechanical mounting and buzzer notification are required. It is typically installed by licensed security technicians or electricians working on commercial or institutional access control systems.
The 400U-RMB is suited for installation in access control setups where an audible signal is needed at a door control point. It functions as part of a broader lock accessory assembly, making it appropriate for commercial buildings, institutional facilities, and secured entry points that rely on electric locking hardware. This unit ships as a single piece.
Designed as an OEM-style replacement or accessory component for electric lock and access control systems that require a plate with buzzer assembly.
Installation should be performed by a qualified electrician or licensed security technician in accordance with applicable NEC requirements. De-energize all related access control circuits before beginning work on the door hardware assembly. Verify that the buzzer voltage matches the system supply before making connections. Follow the manufacturer documentation for mounting orientation and wiring termination.
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