SDC 400U-L2 400-L Series Single Gang Visual Monitoring Station, One Green and One Red LED, Stainless Steel

Get immediate, reliable door-status feedback where it matters most. The Security Door Controls SDC 400U-L2 single gang visual monitoring station (annunciator plate) gives security and facilities teams clear, at-a-glance indication of door or lock condition with one green and one red LED. Built from stainless steel for long-lasting performance in commercial and industrial settings, this frame-mount unit installs easily into a standard single-gang or narrow frame opening.

Designed for integration with existing access control and relay logic, the 400U-L2 accepts 12V or 24V DC and delivers consistent LED signaling for centralized monitoring and surveillance systems. The concise visual cues reduce response times, help prevent unauthorized entry, and simplify daily checks for security staff. Ideal for server rooms, secure entry points, and perimeter access stations, this monitoring station brings rugged reliability and clear status reporting to any security infrastructure. Add the SDC 400U-L2 to your access control or surveillance setup today for dependable door monitoring and faster incident response.

• Instant visual confirmation of door or lock status with one green and one red LED to speed security response
• Durable stainless steel plate built for commercial environments and high-traffic access points
• Simple single-gang or narrow-frame mount for fast installation in existing access control setups
• Compatible with 12V or 24V DC systems and relay logic for seamless integration with surveillance and access control
• Low-power LED indicators reduce maintenance while delivering clear monitoring for security teams