PILZ PNOZ X4 Safety Switch

The PILZ PNOZ X4 Safety Switch is a 24 VDC safety switch with built-in E-stop monitoring and a contact arrangement of three normally open (NO) contacts plus one normally closed (NC) contact. This setup supports wiring for safety circuits that require both signaling and a reliable stop function in machine guarding, while the 24 VDC supply aligns with common control panel power. The X4 monitors the emergency-stop status and provides stop-signaling outputs to safety relays or controllers, helping ensure that a stop condition is detected and routed correctly within the control system. With three NO and one NC contacts, the device offers multiple wiring options for safety paths within a single unit. Typical applications include safeguarding automated equipment and processes where emergency-stop status must be monitored by the control system. Emergency-stop monitoring implies ongoing evaluation of the E-stop input for faults, contributing to safer operation of the controlled equipment.