STI STI-13520FR Universal Stopper with Horn Intercom
Overview
The STI-13520FR is a universal stopper intercom unit combining door retention with integrated horn and two-way communication capability. Operates at 24VDC and mounts in a dome low-profile configuration, allowing both surface and recessed installation at entry points and secured access zones. The enclosed back box protects internal terminals and wiring, reducing on-site termination complexity for integrators deploying multi-door access control systems where audible notification and verbal communication are required at the same mounting location.
Compatibility
Designed for standard 24VDC access control and intercom infrastructure. The universal stopper design integrates into systems requiring door retention (strike-replacement or supplemental holding function) paired with communication capability. Compatible with conventional door control systems, buzzer intercoms, and multi-door access panels that supply 24VDC and require both mechanical retention and audio notification at a single mounted unit. Verify integration with your specific control panel or intercom backbone to confirm wiring schematic match—stopper polarity and control signal routing must align with panel output specs.
Installation Notes
Mount using the dome low-profile option for minimal protrusion on door frames or adjacent wall surfaces. The enclosed back box simplifies rough-in work by housing terminal blocks and preventing exposed conductor contact during concurrent door hardware installation. Secure 24VDC supply and control signal leads to back-box terminals before affixing the dome cap. Confirm frame clearance for the stopper's retraction stroke—some door frame profiles or heavy-duty hinges may limit throw distance. Test door hold force after installation to verify adequate retention under typical traffic loads.
Product Documentation
Download STI STI-13520FR Datasheet (PDF)
