Banner Engineering SI-LS42DMSIF Spring Locking Interlock Switch

SI-LS42DMSIF is Banner Engineering's spring-locking safety interlock switch designed for guard-locking on industrial machinery, delivering reliable solenoid-release operation from a 24 V AC/DC supply in a rugged IP67 plastic housing. It uses a spring-locking, flexible in-line actuator with a Power Unlock mechanism and a contact configuration of 2 NC/1 NO; 1 NC in a compact 170 × 43 × 45 mm package. The device operates from -25 to 70 °C and carries a PL rating of e and a SIL rating of CL3, indicating suitability for safety-related applications in demanding environments. Common applications include guarding access doors on presses, conveyors, and other machinery where the guard must remain closed until the solenoid releases the actuator, consistent with ISO 14119 guidance for locking interlocks.