The NM02VZA-M is a safety switch with a long-housing design from Euchner's NM series, used to detect the position of guards and doors on industrial machinery. It forms part of a safety interlock circuit, signalling the control system when a guard is open so that hazardous machine functions can be prevented or stopped. Typical applications include machine guarding on production equipment where door or panel status must be monitored as part of the overall safety function.