What is the difference between safety relay and ordinary relay?

Update:17-12-2020
Summary:

The safety relay is applied to the safety circuit, whic […]

The safety relay is applied to the safety circuit, which is a protective barrier for the equipment of the general control system. The safety relay can be multi-circuit protected and integrated, and even in the form of a safety plc; the safety relay circuit of a large system is an important link; Latching Relays can be used for coordination of general transitions, voltage conversion, speed, coordination, etc.; safety relays involve safety certification and levels, safety relays can be extended and functional conventional safety guarantees, and relay expansions are often common applications; system safety Control higher than ordinary control is necessary and extensive. Safety relays are mostly used for strobing combinations, and relays are mostly used for contact linkage. Applied to different levels. Relay manufacturer

The safety relay is a combination 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. The lower the error and failure value, the higher the safety factor. Therefore, it is necessary to design a variety of safety relays to protect different levels of machinery, and the main goal is to protect machine operators who are exposed to different levels of danger. So is it different from ordinary relays? What's the difference?

What is the difference between safety relay and ordinary relay?

1. The dimensions of safety relays and ordinary relays are different.

The main difference between a safety relay and a general relay: The so-called safety relay is not a relay without faults, but a regular action when a fault occurs. It has a forced-oriented contact structure, which can ensure safety in case of contact welding. This is completely different from general relays.

2. The emergency stop control used in early safety protection is generally a combination of several relays to complete power-off or delayed power-off control, fault memory and reset interlock, etc. The safety relay also integrates various functions. Different types of safety relays can be selected according to different protection requirements. Powerful function and high reliability.

3. The safety relay has a special color, usually yellow. The current safety relay is reliable and sensitive. It is mainly used to control the power circuit. When an emergency occurs, the circuit controlled by the safety relay is disconnected by pressing the emergency stop switch. Guaranteed safety.

The so-called safety relay is not a relay without faults, but a regular action when a fault occurs. It has a forced-oriented contact structure, which can ensure safety in the event of contact fusion. This is completely different from general relays.