Interlock

An interlock is a feature or device that is commonly used in engineering and safety systems to keep machines, devices, and processes from operating until the guards are in place or the required circumstances are met. When being utilized, interlocks are used to prevent or reduce the chances of injury to the operator, damage to the equipment, and actions being completed in the wrong order or in an unsafe way. Interlocks in machinery safety are often connected to guards, gates, and other access-prevention devices so that hazards cannot occur while those devices are removed or open. Without interlocks, operators risk exposure to moving parts, unexpected startup, and stored energy.