PM866K01 ABB 其为直流输入模块和交流输入模块

PM866K01 ABB 其为直流输入模块和交流输入模块

PM866K01根据现场输入信号的不同，可将输入模块分为开关量输入模块和模拟量输入模块。 开关量输入模块的作用是把各种开关信号变成CPU所需的TTL标准信号。

按输入端电源类型，又可将其为直流输入模块和交流输入模块。输入信号经分压、限流、滤波后再通过光电耦合转换成TTL（5V）标准信号。 模拟量输入模块的作用是把现场连续变化的模拟量信号如温度、流量、电流、电压等转换成CPU能够处理的若干位数字信号。模拟量输入电路一般由运放变换、模转换（A/D）、光电隔离等组成。 

PM866K01 ABB 其为直流输入模块和交流输入模块

PM866K01 Input module can be divided into switching input module and analog input module according to the difference of field input signal. The function of the switching input module is to convert various switching signals into TTL standard signals required by the CPU.

According to the input power supply type, it can be divided into DC input module and AC input module. The input signal is converted into TTL (5V) standard signal by photoelectric coupling after voltage division, current limiting and filtering. The function of the analog input module is to convert the continuously changing analog signals such as temperature, flow, current, voltage, etc. into several digital signals that the CPU can process. The analog input circuit is generally composed of op amp conversion, mode conversion (A/D), photoelectric isolation, etc.

PM866K01 ABB 其为直流输入模块和交流输入模块