SDC 400NU-L2 400-L Series Narrow Visual Monitoring Station, One Green and One Red LED, Stainless Steel

Put clear, actionable door status where your security team needs it most. The Security Door Controls SDC 400NU-L2 400-L Series Narrow Visual Monitoring Station is an annunciator-style remote plate designed to deliver unambiguous green/red LED indication of door open or unlocked conditions. Built in stainless steel with a narrow, single-gang/frame-mount form factor, this monitoring plate installs quickly in tight openings and integrates with relay logic on 12V or 24V DC systems. For access control and surveillance setups, the bright visual indicators reduce response times and help prevent unauthorized egress by making lock status instantly visible to staff and security personnel. The compact SDC annunciator is ideal for retrofits, control rooms, and high-use entrances where durability and clear monitoring are critical. Improve situational awareness and streamline alarm handling across your site — add the 400NU-L2 to your security or access control deployment today.

• Provides instant visual confirmation of door or lock status with one green and one red LED to speed response and reduce false alarms
• Durable stainless steel construction for long-term reliability in high-traffic security and surveillance environments
• Compatible with 12V or 24V DC systems and relay logic for seamless integration with access control and alarm systems
• Narrow, single-gang/frame-mount design fits tight openings and retrofits easily without reworking your door frame
• Simple installation cuts labor time and lowers total cost of ownership for facility managers and integrators
• Backed by a 5-year limited warranty for dependable, professional-grade monitoring performance