Fende relayIt is also applied in many industries, such as the relay used for compressor startup and fan startup on the air conditioning control panel, the relay used to control the forward and reverse rotation of the motor on the washing machine, the protective relay used to control the power output in the television, the switching relay used to control the speed of the electric fan, the relay used to control the starting motor on the motorcycle, there are also many relays in industrial applications, the relay in PLC, etc.

Finder step relay is also an electromagnetic relay, but its working method is very different from the general electromagnetic relay. Generally, when the coil of the electromagnetic relay is energized, its contact will move, and the contact will change from normally open to closed or from normally closed to open. In order to maintain this state, there must be a certain holding current in the relay coil. If the current in the coil is cut off, the relay will be released and the contact will return to the original state. The working principle of general electromagnetic relay is similar to monostable trigger circuit. Its disadvantage is that the coil must maintain current to keep the contact in the required state.

Relay is an electronic control device, which has control system (also known as input circuit) and controlled system (also known as output circuit). It is usually used in automatic control circuit. In fact, it is an "automatic switch" that uses a small current to control a large current. Thus, it plays the role of automatic regulation, safety protection, circuit conversion and so on.

Stepping relay is similar to bistable. After the trigger pulse arrives, it can change the output state and keep it until the next pulse arrives. It has memory function. Stepping relay is a new type of electromagnetic relay designed according to the working principle of current steady-state circuit. It is driven by pulse. The mechanical structure ensures that the contact is locked after action until the next driving pulse arrives. The step relay can keep the contact in the required state without maintaining the current, which can save electric energy.

Step relay can be called pulse relay from the driving method, and step steady-state relay from the working method and output state.