STI STI-1200CP6 Stopper II® Contractor 6-Pack, Flush Mount
Overview
The STI-1200CP6 is a 6-pack of Stopper II® flush-mount door holders designed for integration into access control systems where temporary door release or hold-open is required. Each unit installs flush into the door frame, minimizing visual profile while providing reliable electromagnet-based retention. This model fits standard door hardware applications across single and multi-door access control deployments in commercial facilities, warehouses, and secured entries.
Compatibility
The Stopper II® Contractor line integrates with standard access control panels and strike controllers that deliver 12VDC or 24VDC solenoid power. Verify your panel's output voltage and amperage rating before deployment — the unit's electromagnet draw must fall within your controller's per-channel capacity. Compatible with most commercial access control systems using relay-driven or mosfet-output strike circuits, including legacy and modern IP-based panels. Consult your system integrator to confirm strike voltage compatibility with your specific panel model.
Installation Notes
Flush-mount installation requires routing the solenoid leads through the door frame to the strike controller. Ensure conduit or cable routing is protected from foot traffic and environmental exposure. The mounting depth is minimal, but frame cutout dimensions must match the housing footprint — verify frame thickness and material (wood, metal, composite) before ordering. Secure all connections with appropriate waterproof terminals if the installation is in damp or outdoor areas. Do not exceed rated solenoid voltage or continuous duty cycle — oversizing power delivery can reduce electromagnet life.
What's in the Box
- 6x Stopper II® flush-mount door holder units
- Mounting hardware per unit
