Resideo 4959SN V-Plex Addressable Overhead Door Contact

Optimize perimeter security with the Resideo 4959SN V‑Plex addressable overhead door contact — designed for reliable, low‑cost monitoring in commercial and industrial installations. This magnetic contact leverages Resideo’s patented V‑Plex polling loop technology to provide point identification and alarm reporting over a simple two‑wire run, cutting wiring complexity and installation time for security integrators and facility managers. Built with a rugged aluminum housing, an adjustable L‑bracket magnet and a 2' armored cable, the 4959SN stands up to heavy use and harsh environments while maintaining a standard 2" (51 mm) gap for consistent operation. The normally closed SPST reed switch and surface‑mount configuration integrate seamlessly with central monitoring stations, access control, and surveillance systems. Rated for extreme low temperatures (down to -76°F) and backed by a 2‑year limited warranty, this contact is ideal for overhead doors, loading docks and perimeter access points. Specify the Resideo 4959SN for dependable, addressable door monitoring in your next security or surveillance deployment — contact sales to order or add it to your next installation.

• Simplifies commercial door monitoring with V‑Plex addressable polling over two wires, reducing installation labor and wiring costs
• Rugged aluminum housing and adjustable magnet deliver durable, weather‑resistant performance for overhead doors and gates
• 2' armored cable and surface‑mount design provide fast, secure installation in industrial and surveillance environments
• Normally closed SPST reed switch ensures dependable contact supervision for central monitoring and alarm systems
• Engineered for extreme conditions (operates down to -76°F) and backed by a 2‑year limited warranty for long-term reliability