What is the difference between a safety relay and a common relay?
The so-called safety relay is not a relay without fault, but a regular action when a fault occurs. It has a mandatory guiding contact structure. In case of contact melting, it can also ensure safety, which is totally different from the general relay.
Safety relay is composed of a plurality of relay and circuit, in order to complement each other to achieve the correct abnormal defect, and low malfunction of relay function complete, the failure and the failure value is low, the safety factor is higher, so we need to design a variety of safety relays to protect the different grade of machinery, mainly the target machine operators in the risk exposure of the protection in different grades. So, is it different from the ordinary relay? Where is the difference?
The difference between the safety relay and the ordinary relay is:
1, the safety relay has special color, usually yellow, safety relay, current reliable, sensitive, mainly used to control the power supply circuit, when there is an emergency, press the emergency stop switch safety relay control circuit is broken, so as to ensure safety.
2. The safety relay and the ordinary relay are different in size.
The main difference with the general safety relay relay: the so-called safety relay is not fault relay, make regular action but when a fault occurs, it has forced guide contact structure, to ensure the safety of it in case of contact phenomena, this point is completely different with the general relay.
3, the emergency stop control used in early safety protection is usually combined by several relays to complete power failure or time delay power failure control, fault memory and reset chain. The safety relay also integrates all kinds of functions together. Different types of safety relays can be selected according to the different protection requirements. The function is powerful and the reliability is high.
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