SI Series safety limit switches combine switch and actuator in one device that mounts directly to a machine. The switch is actuated by the presence or movement of a mechanical machine guard and triggers an output when the guard reaches a user-defined switching point.

• Four actuator types are available—lever, spindle-mount lever, plunger, and roller
• Mechanically coded actuators use two independent operating elements to minimize intentional tampering or defeat
• Rotating head and top or side engagement allows for eight different actuator positions
• One-piece switch eliminates need for alignment, engagement and risk of breakage of a separate actuator
• Design meets positive opening requirements for safety interlocks
• IEC IP65 rated housing