When using Pilz safety relays, it is necessary to pay attention to the correct way to use them. The key to the correct use of safety relays is to protect the wiring method of the input circuit. In general, there are three types of wiring methods for safety relays, and the safety relays are used to protect mechanical safety and personal safety after they are connected.
Wire the Pilz safety relay in accordance with the correct wiring method in order for the safety relay to perform its role. Wiring method of safety relay:
The first is to connect the normally closed contacts of the protection elements in series on the working power supply of the safety relay. Then short the input circuits of the safety relay itself. This method is relatively simple and the wiring is relatively convenient.
The second is to connect the normally closed contacts of the protection element to the single-channel input contacts of the Pilz safety relay, and then short-circuit the two-channel contacts respectively. The third method is to connect the normally closed contacts of the protection elements to the two-channel input loop and the single-channel input loop to the short.
The use of Pilz safety relay is not complicated, and after the power connection is accurate, it can be used normally in the control input circuit. As a control part of the safety loop, the Pilz safety relay is judged by the internal loop after receiving the safety input. The safety relays on the market are all dual-channel signal type, so only when the two channel signals of the safety relay are normal, the safety relay can work normally.
If one of the channels of the Pilz safety relay is disconnected during operation, the output of the Pilz safety relay will stop until both channels are normal and can be reset. The correct use of Pilz safety relay is still achieved through wiring, and correct wiring can ensure the normal operation of the safety relay to a large extent.
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