SDC 482O1U Narrow Push Plate SPDT Controller
Overview
The SDC 482O1U is a narrow-profile push plate actuator with SPDT (Single Pole Double Throw) momentary contact output. At 4½" wide × 11½" tall, it fits tight corridors, narrow vestibules, and ADA-compliant entryways where standard single-gang faceplates won't fit the wall prep. The 482O1U operates at 28VDC with a 1 Amp resistive rating — suitable for triggering electronic strikes, magnetic locks, and relay circuits in multi-door access control systems. Stainless steel faceplate (18 gauge) handles commercial washdown environments without corrosion.
Compatibility
The 482O1U integrates with any access control system accepting momentary SPDT closure at 28VDC. It works downstream of credential readers (proximity, MIFARE, DESFire, NFC) or networked access control panels that output a relay command. Mounting options include recessed behind drywall, surface-mounted in a standard electrical box, or bollard-mounted at floor level. Wireless-compatible versions are available in the 480-series family; confirm your specific reader and panel require wired contact closure before selecting this model.
Installation Notes
Faceplate depth is 7/8" — measure your wall cavity or surface box depth to avoid interference. Momentary action means the contact closes only while the button is pressed; no latch or timer is built in — your access control panel or relay logic must handle timing and lock control. Wire the SPDT common and one throw (normally open or normally closed, depending on your fail-safe logic) to your strike or magnetic lock circuit. Confirm your 28VDC power supply has adequate amperage for all connected loads; 1 Amp per plate is the budget baseline. For narrow corridors where two users may press simultaneously, the SPDT contact handles only one press at a time — multiple presses queue at the access control logic, not the plate itself.
