Schmersal AZ16-12ZVRK-M20 Interlock Switches

Schmersal AZ16-12ZVRK-M20 is a keyed safety interlock switch with a separate actuator designed for guard door control on industrial machinery. It provides one normally open (NO) and two normally closed (NC) contacts, rated at 4 A and 230 V, enabling reliable interlock circuits for safe return-to-safe state. The device uses a fibreglass reinforced thermoplastic enclosure, measures 52 mm x 90 mm x 30 mm, and is double-insulated for robust electrical isolation. It offers three M20 x 1.5 cable entries, universal coding, and mounting holes with slotted and circular options for flexible installation. Known for long life and high contact reliability at low voltages and currents, it is designed to resist soiling and maintain performance in dirty environments. It is IP67-rated, suitable for washdown and harsh industrial settings. Standards compliance includes EN IEC 60947-5-1 and EN ISO 13849-1, aligning with safety-located interlock requirements. The AZ16-12ZVRK-M20 variant is part of Schmersal's AZ16 family and is paired with a separate actuator (AZ 16-12ZVRK-M20), offering lockable access control via a key mechanism to prevent opening while the machine is energized. Typical applications include guarding doors on presses, conveyors, and packaging lines where a lockable interlock and safety circuit monitoring are required.