3BHE032285R0101 ABB 电路板模块 提供能量的一部分电路

In the circuit board, no matter what type of circuit board is basically composed of: power supply circuit, input interface circuit, microprocessor control circuit, output interface circuit, display circuit, protection circuit and communication circuit, etc. As long as we master the circuit composition and control principle of these seven categories, know the structural composition characteristics and key components of each type of circuit, can determine in the circuit board each part of the circuit belongs to that type of circuit, familiar with the fault law and characteristics of each type of circuit, you can repair for various types of circuit boards.

Power supply circuit: The power supply circuit is a part of the circuit that provides energy to each unit circuit in the entire circuit board. It works in a high voltage and high current environment, and is the part of the circuit that is most prone to failure.

The function of the power supply circuit is to convert 220VAC or 380VAC AC into a variety of different grades required by the circuit board, and the output voltage is constant ±5V, 12V, 15V, 18V, 24V grade DC.

Input interface circuit: The input interface circuit is a part of the circuit board and the outside world for information exchange and communication, which can convert what people want to say or do to the circuit board into an electrical signal that the microprocessor in the circuit board can recognize. For example: When we are monitoring the temperature, if you use our ordinary human communication language to say to the microprocessor, the temperature is high, please turn it down a little, the microprocessor is not able to understand what we say, at this time, we can first use the interface circuit to convert the temperature signal into an electrical signal, and then process the converted electrical signal. You get an electrical signal that the microprocessor can recognize. That way, once the microprocessor understands what we want it to do, it can do what we want it to do. The same is true of other signals such as illumination, pressure, wind, liquid level, position, and so on.

The function of the input interface circuit is to convert what people want to say or do to the board into a level signal that the microprocessor in the board can recognize.

Microprocessor control circuit: microprocessor control circuit is mainly used in the main control board circuit board, when we see the circuit board in the shape of a square or rectangular shape, there are many pin components, next to it there are crystal components, this component is mostly microprocessor components, microprocessor as the core component around the microcontroller circuit.

The main function of the microprocessor control circuit is to accept the relevant information sent by the input interface circuit, and analyze and process the information, and make the corresponding processing results, and further send the processing results to the output interface circuit.