Rolling Door Contact Magnetic Reed Switch Alarm Home Security Wired with 2 Wires for N.C. Applications OC55 Quick summary The OC55 is a wired magnetic reed switch designed for rolling door and shutter security. Its twowire, normally closed configuration integrates directly with standard wired alarm panels to detect when a door or shutter opens or closes. Key benefits Reliable perimeter detection: The magnetic reed switch provides a simple, proven method to detect door movement and trigger an alarm when a contact opens. Straightforward integration: Twowire design configured for normally closed circuits works with most wired alarm control panels without extra electronics. Lowprofile mounting: Conceived for discreet installation on rolling doors and shutters to reduce visual impact and avoid interference with door operation. Durable operation: Built for repeated open and close cycles typical of rolling doors and commercial shutters, supporting longterm use in security systems. Features and attributes Function: Magnetic reed switch that changes contact state when the magnet is separated from the switch, suitable for alarm input detection. Wiring: Two wires, intended for normally closed applications (N.C.). Connects to alarm panels that accept N.C. loop inputs. Model: OC55, specifically identified for rolling door contact applications. Compatibility: Designed for use with wired alarm systems and control panels that support N.C. magnetic contacts. Suitable for residential and commercial rolling doors, shutters, and gates. Size and mounting: Compact, lowprofile form factor suitable for mounting on door frames or tracks where space is limited. Typical mounting uses screws or adhesive depending on installation surface. Performance: Provides consistent contact switching for dooropen detection; appropriate for repeated daily operation in security setups. Practical use scenarios Rolling shutter on a storefront: Mount the OC55 on the shutter frame and magnet on the moving slat to detect unauthorized opening after hours and feed the signal to the alarm panel. Residential garage door: Use the OC55 as a dooredge contact to tell the security system whether the garage door is closed, preventing false disarm situations and improving perimeter awareness. Warehouse loading bay: Install on commercial rollup doors to monitor door position for security logging and to trigger alerts if a door is opened outside scheduled hours. Installation tips Wire the two contacts into the alarm panel loop configured as normally closed. Position the magnet and switch so they align closely when the door is closed for reliable operation. Test the circuit after installation to confirm the panel detects open and closed states correctly. The OC55 provides a practical, nofrills solution for integrating rolling doors and shutters into wired security systems where a normally closed magnetic contact is required.