SM812K01全新原装供应处理器单元模块库存优势现货ABB

SM812K01全新原装供应处理器单元模块库存优势现货ABB

SM812K01全新原装供应处理器单元模块库存优势现货ABB

CPU模块主要由微处理器(CPU芯片)和存储器组成。在PLC控制系统中厂CPU模块相当于人的大脑，它不断地收集输入信号，履行用户程序，改写系统的输出；存储器用来贮存程序和数据。

CPU模块的工作电压一般是5V，而PLC的输入／输出信号电压一般较高，如直流24V和沟通220V。从外部引进的尖峰电压和搅扰噪声可能损坏CPU模块中的元器件，或使PLC不能正常工作。

在I／O模块中，用光耦合器、光电晶闸管、小型继电器等器件来阻隔PLC的内部电路和外部的I／O电路，I／O模块除了传递信号外，还有电平转换与阻隔的效果。

The CPU module is mainly composed of a microprocessor (CPU chip) and memory. In the PLC control system, the factory CPU module is equivalent to the human brain, which constantly collects input signals, performs user programs, and rewrites the output of the system. Memory is used to store programs and data.

The operating voltage of the CPU module is generally 5V, while the input/output signal voltage of the PLC is generally higher, such as 24V DC and 220V communication. The surge voltage and interference noise introduced from outside can damage the components in the CPU module or make the PLC not work properly.

In the I/O module, optical couplers, photoelectric thyristors, small relays and other devices to block the PLC's internal circuit and external I/O circuit, I/O module in addition to transmitting signals, there are level conversion and blocking effects.