A safety relay is a special relay that ensures the safety of industrial equipment. It can detect anomalies in the operation of the machine. When an abnormality occurs in the machine, it can be stopped immediately to ensure the safety of workers. Therefore, safety relays are essential safety equipment in industrial automation management.

The main characteristics of safety relays are as follows:

1. High reliability: The safety relay is a high reliability device. It can detect abnormalities in machine operation, such as interference, overload, power failure, etc., and can ensure the safety of workers.

2. Flexibility: Safety relays have high flexibility and can cooperate with different control systems to be more comprehensive. Furthermore, safety relays can also be connected in series or parallel with other control devices to realize more complex control systems.

3. Low cost: The cost of safety relays is relatively low compared to other protective devices and can be easily adapted to sites of different sizes.