Hinge Interlock Safety Switch. The IDIS-2 Compact Safety Interlock Switch has been designed and manufactured to provide position interlock detection for moving guards.Designed to fit on the hinged axis of machine guard doors, the Switch body fits to the door frame and the leaf actuator fits to the door.The rugged Stainless Steel actuator profile is designed to fix to the door and provide a positively operated not easily defeatable interlock mecha..