A safety relay is a module composed of multiple relays and logic circuits. It is a circuit composition unit. Its purpose is to complement each other's defects in a fault state, so as to achieve the correct and low malfunction function and reduce Errors and failure values improve safety factors. In a nutshell, it should be called a safety relay module.

Due to different mechanical equipment and different process links, there are different safety risks and different levels of danger. Therefore, in product design, a variety of safety relays are designed to protect different levels of machinery and equipment. The main purpose is to protect machine operators who are exposed to different levels of danger.