Safety Relays

Safety relays are devices that implement safety functions. They implement responses in a safe and reliable way when a predetermined criteria is met, allowing for predictable responses in safety equipment. Relays are used in many ways, such as stopping machine movement in a controlled and safe manner, monitoring the positioning of movable guards, or emergency stop functions. Safety relays are the base level of safety controls circuit hardware, and are not as flexible as use of a safety rated PLC.