How Does a Safety Light Curtain Work with a Safety Relay?

When the safety light curtain works with the safety relay, a complete safety protection system is formed to protect operators from harm from mechanical equipment. Its working process is as follows:

Light curtain transmission and reception: The safety light curtain consists of a transmitter and a receiver. The transmitter sends out a series of infrared beams, and the receiver detects these beams. If the beams are not blocked, the system assumes that there are no obstacles in the operating area and the equipment is operating normally.

After the safety relay receives the interrupt signal from the light curtain, it will process it according to the preset safety logic. The safety relay contains redundant circuits or dual-channel designs to increase the reliability and safety of the system.

Once the safety relay confirms that there is a safety hazard, such as a beam interruption that cannot be restored, the system will execute the predetermined safety response measures. This usually includes:

Once the obstacle or person leaves the light curtain area, the light beam is restored, the safety relay receives the signal, confirms that the danger is eliminated, and the equipment can be restarted or resumed.