SDC FS23MIU SpaceSaver Electric Bolt Lock, Narrow Mortise, Dual Failsafe, CSFM Listed for 1-3/4" Frame, Dull Stainless

Protect perimeter entrances and emergency exits with a proven, code-compliant locking solution. The Security Door Controls SpaceSaver FS23MIU electric bolt lock delivers reliable, post-hours security by combining a patented dual-failsafe design with narrow-mortise convenience. Unlike conventional failsafe bolts, the FS23MIU uses repelling magnets in addition to a spring so the bolt will retract and unlock even if a spring fails—making it the only CSFM-listed electric bolt approved for locking after-hours perimeter and emergency-exit doors.

Designed for practical commercial use, the FS23MIU fits 1-3/4" face frames and accepts 12/24VDC power, simplifying retrofits and integration into existing access control and monitoring systems. Built to UL standards and backed by a 5-year limited warranty, the dull stainless finish and durable construction reduce maintenance and extend service life for high-traffic openings. Optional door status and bolt status sensors plus an adjustable auto-relock switch give security integrators the flexibility to connect to surveillance, alarm, and building management platforms.

Specify the Security Door Controls FS23MIU for robust, monitored perimeter security—contact us to integrate it into your next access control or security monitoring project.

• Dual-failsafe operation (spring + repelling magnets) ensures doors unlock even if a mechanical spring fails, delivering code-compliant after-hours perimeter and emergency-exit security.
• Narrow mortise design fits 1-3/4" minimum frames for fast retrofit installations, reducing labor and downtime on existing entrances.
• Dual 12/24VDC compatibility makes integration with access control, alarm, and monitoring systems straightforward and flexible.
• CSFM-listed and UL-rated construction provides certified reliability for perimeter entrance applications and peace of mind for facility managers.
• Adjustable auto-relock and optional door/bolt status sensors enable tailored monitoring and seamless integration with surveillance and building management systems.