Safety Interlock Switches

Locking-type safety interlock switches are available in power-to-release or power-to-lock models. These types can be used in a variety of ways depending on the situation and hazard.

Power-to-release models use a spring to lock the device, ensuring the device remains locked even when the power is turned off. This means these models are ideal for protection against large robots, rotating objects, and other hazards that cannot be stopped immediately due to inertia. Power-to-lock models, however, use a powered solenoid to lock the device, meaning, the lock is released immediately when the power is turned off. These models are useful in situations where a lock is necessary to protect workers from a hazard that can be immediately shut down if the power is interrupted, or to protect the operation of the machine.