Sdc 423U Exit Push Switch Spdt Green Timer

Product Description

The SDC - SECURITY DOOR CONTROLS 423U is a momentary exit push switch featuring a single-pole double-throw (SPDT) contact configuration with a built-in timer function and a green actuator. It is designed for use in access control and egress systems, providing a reliable switch signal to door controllers, electric strikes, or magnetic locks when a user initiates an exit request. The SPDT output allows wiring flexibility for both normally open and normally closed circuit configurations. Licensed locksmiths, access control technicians, and security system integrators are the typical installers for this type of device.

The 423U is suited for commercial and light industrial door hardware applications where a timed exit request switch is required. It mounts at a standard door or wall location to serve as a request-to-exit (REX) station, integrating with access control panels and electric door hardware. The green button provides a clear visual indicator for building occupants to initiate a controlled exit. It is appropriate for use in interior door assemblies where timed switch release is part of the access control sequence.

Key Features

• SPDT contact configuration supports normally open and normally closed wiring
• Built-in timer function controls the duration of the switch output signal
• Green actuator provides clear visual exit cue for occupants
• Momentary push action suited for request-to-exit applications
• Sold as a single unit (each)

Compatibility

Designed as an OEM-style replacement or new-installation exit push switch for commercial access control and egress systems requiring an SPDT momentary switch with timer output.

Installation Notes

Installation is typically performed by a licensed locksmith or access control technician familiar with low-voltage door hardware wiring. De-energize all connected door control equipment and access control panels before making any wiring connections. Follow NEC guidelines for low-voltage wiring runs and consult the door hardware manufacturer specifications for proper integration with electric strikes or magnetic lock controllers. Verify timer function operation after installation before returning the door to service.