Sdc 400U-SN Siren on Single Gang Plate Door Alarm

Product Description

The SDC - SECURITY DOOR CONTROLS 400U-SN is a siren-on single gang plate designed for door alarm and access control applications. This device mounts to a standard single gang electrical box and provides an audible siren alert when a monitored door is opened or a trigger condition is met. It is used in commercial and institutional facilities where door status notification or unauthorized entry deterrence is required. Licensed security installers and low-voltage technicians are the primary trades working with this type of hardware.

The 400U-SN fits into door alarm, door holder, and access control systems where a compact, gang-plate-mounted siren is needed. Typical installations include stairwell doors, storage rooms, server rooms, and other controlled access points in commercial buildings. The single gang form factor simplifies installation into standard wall boxes already present in new or retrofit construction.

Key Features

• Single gang plate form factor for straightforward mounting into standard electrical boxes
• Integrated siren provides audible alert for door alarm and access control systems
• Compact design suited for space-constrained wall or door frame installations
• Sold as an individual unit for targeted replacement or new installation

Compatibility

Designed as an OEM-style replacement or new-install component for single gang plate door alarm and access control systems requiring an integrated siren output.

Installation Notes

Installation should be performed by a licensed low-voltage or security systems technician in accordance with applicable local and national electrical codes. Disconnect and de-energize the access control or alarm panel before wiring the device to the gang box. Verify the gang box dimensions and mounting pattern are compatible before securing the plate. Do not exceed the device rated electrical parameters when connecting to the alarm or control panel output.