Banner Engineering SI-LS42WSI Safety Interlock Switch

The Banner SI-LS42WSI Safety Interlock Switch is a locking‑style door interlock designed to secure access to guarded machinery. It uses a spring‑locking interlock body with a solenoid‑unlock mechanism and is suited for safety‑critical applications where opening a guard door interrupts the machine. Powered from 110 or 230 V AC, it provides a contact configuration of 2 NC/1 NO; 1 NC, enabling integration with safety circuits that monitor stop conditions and guard status. Encased in a plastic housing, the compact 170 × 43 × 46 mm enclosure carries an IP67 rating for dust and water resistance in harsh industrial environments. As part of Banner Engineering’s SI-LS42 family, the SI-LS42WSI is designed to work within Banner’s safety ecosystem, allowing connection to safety controllers and guard‑locking systems to implement monitored stops and safe‑state conditions when guards are opened or closed. Typical applications include guarding doors on presses, conveyors, and packaging lines where a door interlock is required to ensure the guarding remains in place during operation. Key specs: supply voltage 110/230 VAC; interlock body with spring locking; dimensions 170 × 43 × 46 mm; plastic housing; IP67; contact arrangement 2 NC/1 NO; 1 NC.