Door Contact Sensor No name KN-CA56D – wired magnetic reed switch KN-CA56D

Wired door contact sensor No name KN-CA56D is a magnetic reed switch designed to detect opening and closing of doors and gates. The device includes a reed switch and a mating magnet sized for mounting on a door frame and door leaf. It provides a simple electrical contact output configured for normally closed or normally open operation and is intended for use with alarm panels, access control systems and building automation where a wired door or window status input is required.

Advantages

The KN-CA56D offers a compact mechanical design and a straightforward wired interface that simplifies integration into existing alarm and control panels. Its magnetic reed principle yields a reliable on/off contact with low power consumption and minimal maintenance. The sensor can be mounted flush or surface-mounted depending on installation constraints and is suitable for both indoor and protected outdoor applications when installed according to basic weather protection guidelines.

Suitable for

• Alarm systems requiring door/window state monitoring
• Access control setups for entry detection and interlocks
• Building automation systems that need wired binary inputs
• Residential and commercial doors, gates and cabinet status sensing

Key specifications

• Operating principle: magnetic reed switch
• Contact output: configurable normally closed or normally open contact
• Connection type: wired with lead wires for direct panel connection
• Mounting: separate switch and magnet for frame and leaf installation; supports flush or surface mounting
• Environmental suitability: for indoor use and protected outdoor locations when installed appropriately
• Typical applications: door and gate open/close detection, window status monitoring

How to use

Install the switch body on the fixed frame and align the magnet on the moving door or gate so that the magnet passes within the activation gap specified by the manufacturer. Connect the sensor’s wires to the alarm, access control or automation panel according to the panel’s input requirements and wiring diagram, configuring the circuit for normally closed or normally open operation as needed. Verify correct alignment and operation by opening and closing the door while observing the panel input or a continuity meter. Secure wiring and mounting fasteners to prevent displacement during door movement.

Usage recommendations

For reliable operation, ensure the magnet and switch remain aligned within the activation gap, route cables to avoid pinch points, and protect external installations from direct weather exposure; follow the receiving panel’s input type and any recommended end-of-line resistor or supervision wiring when integrating into alarm systems.