STI KIT-GLR-BB-4 Blue GLR Backbox Kit
Overview
The STI KIT-GLR-BB-4 is a backbox assembly designed to house and protect proximity reader wiring and strike power in door-mounted access control installations. The unit ships with a blue finish and includes a ½ inch NPT threaded plug for conduit entry, allowing code-compliant electrical integration at the frame. Rated for 9VDC lock/strike operation, this kit simplifies the installation of compact reader systems where space inside the door frame is limited or where conduit runs are required by building code.
Compatibility
The KIT-GLR-BB-4 integrates with STI proximity reader families and systems operating at 9VDC strike power. The backbox mounting pattern and ½ inch NPT entry port accommodate standard electrical conduit connections, making it suitable for retrofit and new-construction door frame applications using proximity-based credentials. Confirm your specific reader model works with 9VDC before ordering—some higher-current strike configurations may require alternative backbox ratings.
Installation Notes
The ½ inch NPT plug provides a water-sealed threaded entry point for conduit or cable; ensure conduit is secured within 12 inches of the box entry to meet electrical code. The blue finish is suitable for indoor and covered outdoor environments but is not rated for direct salt-spray or high-UV exposure. Mount the backbox to the door frame using the existing screw holes; use appropriate fasteners for your frame material (wood screws for wood frames, lag bolts or masonry anchors for steel or concrete). Verify 9VDC strike power supply capacity before connecting multiple units in series.
