Nascom N505ASCD/ST Overhead Door Rail Mount Switch for Curtain Doors Featuring No Dead Spot Technology, Silver

Ensure dependable perimeter protection for roll-up and curtain doors with the Nascom N505ASCD overhead door rail mount switch. This magnetic contact door sensor delivers consistent, false-alarm-free performance for security, surveillance and alarm monitoring systems by combining NO DEAD SPOT™ technology with a powerful N35 NdFeB rare-earth magnet for extra-wide gap performance. The compact 2" block with L-bracket is designed specifically for curtain and rollup doors, keeping installations neat and unobtrusive while maintaining reliable contact even when doors warp or shift.

Built for installers, the N505ASCD includes 24" armored cable lead protection and 36" 22AWG wire leads for robust, tamper-resistant connections. The extruded anodized (Type II) aluminum housing adds mechanical durability for busy environments like warehouses, loading docks and retail shutters. Listed to UL634, it integrates seamlessly with access control, alarm and monitoring systems to reduce nuisance alarms and simplify maintenance.

For secure, long-lasting door monitoring that minimizes downtime and service calls, choose the Nascom N505ASCD overhead rail switch — ideal for commercial and industrial security applications. Contact us for bulk pricing or add to cart to upgrade your perimeter protection today.

• Prevents false alarms caused by door warping or misalignment with NO DEAD SPOT™ technology for consistent security monitoring
• Wide-gap N35 NdFeB rare-earth magnet ensures reliable contact across variable rail positions and door travel
• Armored 24" cable lead and 36" 22AWG wire leads protect connections from wear, improving long-term installation reliability
• Compact surface-mount design and L-bracket make mounting on roll-up and curtain doors fast and unobtrusive
• Extruded anodized aluminum housing resists corrosion and mechanical wear for durable performance in indoor access control applications