Schmersal BN533-11ZG Non-Contact Coded Magnetic Sensor

Schmersal BN533-11ZG Non-Contact Coded Magnetic Sensor is a coded safety sensor that uses a non-contact magnetic principle to monitor movable guards, eliminating wear from mechanical interlocks. It operates from a 24 V DC supply and provides a 1 NO / 1 NC contact configuration for safety signaling, suitable for integration with Schmersal safety-monitoring hardware such as SRB(-E), PROTECT-SELECT, or PSC1. Housed in a plastic enclosure, the device is designed for guard-door interlocks and other machine-access protections, with the magnetic actuating element positioned on the opposing part of the guard. The BN533-11ZG employs coded magnetic technology to resist tampering and incorrect actuation, and is intended to be used as part of a coded safety system that complies with EN 60947-5-3 and EN ISO 14119 when paired with appropriate monitoring modules. Variants in the BN series are available with differing cable lengths to accommodate diverse installation layouts. The sensor represents a non-contact alternative to mechanical limit switches, combining reliability with straightforward electrical integration for safeguarding applications.