Schmersal AZ 16-12zvrk-M20 Safety Interlock Switch

AZ 16-12ZVRK-M20 is a Schmersal safety interlock switch with a separate actuator, designed for reliable door interlock on industrial machinery. The unit supports three actuating directions and carries two safety contacts (normally closed) plus one auxiliary contact (normally open), with a coding level classified as Low according to EN ISO 14119. Its thermoplastic, glass‑fibre reinforced, self‑extinguishing housing measures 52 mm x 90 mm x 30 mm and weighs about 120 g, delivering a compact, robust safety solution. The switch features three M20 x 1.5 cable entries and three cable glands for wiring flexibility, with electrical connection via screw terminals (M20 x 1.5) for a secure, field‑terminable install. Built for harsh environments, it is IP67 rated, offering strong protection against dust and immersion in water, and its design is noted for insensitivity to soiling and long life in low‑voltage/low‑current applications. The mounting arrangement uses two M6 screws, with latching force around 30 N and a positive break travel of 8 mm, ensuring dependable door interlock operation even in dynamic machinery settings. Electrical life is rated at up to 2,000,000 operations for NC contacts and 1,000,000 operations for the auxiliary NO contact under specified load conditions, with a mission time of 20 years. The device aligns with EN ISO 13849-1, offering Performance Level up to c and Category 1, making it suitable for safety circuits that require certified reliability and straightforward integration into existing safety architectures.