Schmersal AZ17-11ZK Safety Switch

Schmersal AZ 17-11ZK is a key-operated safety interlock switch in the AZ 17 family, designed to secure access to hazardous machinery. It combines one normally open and one normally closed contact (SPST-NO / SPST-NC) in a compact IP67-rated plastic housing finished in black, material number 101121960. The device is intended for door interlock applications in safety circuits, where opening a guarded access must force a machine to stop and prevent restart. It supports 230 VAC operation with a rated load of up to 4 A and offers flexible termination options, including quick-connects or solder terminals. Variants exist with extended cable lengths (for example AZ 17-11ZK 2243-1 with 5.0 m cable). The latching force of the actuator is specified at about 5 N, ensuring reliable engagement without excessive effort. This safety switch is commonly used in industrial guardings to enforce access control on conveyors, presses, and other equipment where machine access must be controlled by an interlock switch that is separate from the actuator. Part number 101121960 and the AZ 17 family identify its compatibility with Schmersal safety control systems and related safety relays.