1. The machine cannot suddenly restart before the emergency stop is released.
2. When the machine safety circuit fails, the machine power supply can be stopped.
3. If the safety circuit fails, the machine can no longer be started.
The safety relay is composed of several relays and circuits in order to complement each other's abnormal defects and achieve the complete function of the correct and low malfunction relay, so that the lower the fault and the failure value, the higher the safety factor. Therefore, a variety of safety relays must be designed to protect different grades of machinery.
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