SDC 423PUL1G Pneumatic Door Controller
Overview
The SDC 423PUL1G is a pneumatic timer module for networked access control systems managing multi-door facilities. It delivers adjustable hold times from 1 to 45 seconds—critical for controlling pneumatic door strikes on fire-rated doors, handicap operators, and delayed-egress hardware. Operating on 24VDC, the unit integrates into access control systems requiring centralized timing logic across multiple doors. The DPST contact rating (3A @ 30VDC resistive) makes it suitable for controlling strike solenoids, magnetic locks, and relay circuits in commercial and institutional retrofits.
Compatibility
The 423PUL1G is designed for multi-door access control panels and standalone door controller installations supporting 24VDC pneumatic strike timing. It integrates with systems that accept DPST relay outputs or networked control protocols requiring timed, adjustable hold signals. Verify your system's control input accepts a 24VDC timed relay output before installation. This unit is a pneumatic timing device—it requires pneumatic strike hardware (door-mounted pneumatic operator or solenoid valve) to function; it does not directly control electronic locks or mag locks without intermediate relay conversion.
Installation Notes
The 423PUL1G mounts on a single-gang wall plate (2⅞ inch × 4½ inch faceplate, 20 gauge stainless steel). Supplied with 6-inch, 20 AWG wire leads for connection to the access control panel's 24VDC output and timing relay input. Input voltage tolerance is 12/24 VDC ±10%—confirm panel output does not exceed this range. The adjustable timer dial (1–45 second range) is user-configurable on-site; set the required hold time before final commissioning. Installation requires standard electrical hand tools and a panel-mounted 24VDC supply with sufficient current capacity for the strike solenoid load (typically 2–3A depending on strike type). Do not exceed 3A @ 30VDC across the DPST contact.
What's in the Box
- 1x SDC 423PUL1G pneumatic timer module with single-gang stainless steel faceplate
- 1x 6-inch 20 AWG wire leads (pre-attached)
