Banner Engineering SI-LS42DMH Safety Interlock

SI-LS42DMH is Banner Engineering’s IP67‑rated locking‑style safety interlock switch that combines a mechanical interlock body with a solenoid locking mechanism to keep a machine guard securely closed until the hazardous motion has come to a stop. The unit uses a 24 V AC/DC solenoid and provides two normally closed (2 NC) safety contacts plus a monitor contact configured as 1 NC/1 NO, enabling both a primary interlock signal and a guarded stop indication. Its compact thermoplastic housing measures 170 x 43 x 45 mm and supports a power‑lock operation, with an operating temperature range of -25 to 70 C, and safety ratings including PL e, SIL CL 3, and Cat 4. Key performance specs include 1500 N extraction force, 4.4 VA rated operating current, and a 12 VA inrush, making it suitable for demanding industrial environments such as guarding doors on presses and conveyors where guarded access must remain locked until it’s safe to proceed.