Banner Engineering Corporation SI-LS42DMH Safety Switch

The SI-LS42DMH is Banner Engineering’s locking‑style safety interlock switch with a solenoid lock, designed to secure guarded access points on industrial equipment. It operates from 24 V ac/dc and provides two safety contacts: 2 NC and 1 NC/1 NO, enabling dual‑channel safeguarding for guard interlock logic. The interlock body measures 170 × 43 × 45 mm with a thermoplastic housing and an IP67 rating for rugged industrial environments, and it uses a Power Lock mechanism to secure the guarded opening until released by the safety control.

Electrical and safety performance notes: the SI-LS42DMH carries a 24 V ac/dc supply, with no auxiliary output and no in‑series diagnostics. Its contact configuration remains 2 NC and 1 NC/1 NO, and it features a wiring‑chamber connection. The DMH variant is specified with up to 1500 N extraction force, 4.4 VA rated operating current, and 12 VA inrush, along with Cat 4 safety, PL e, and SIL CL 3 ratings. The device is rated for temperatures from −25 to 70 C and maintains IP67 protection, making it suitable for demanding guard‑interlock applications on conveyors, presses, and other high‑risk machinery.