一、模拟量模块的种类 (1)模拟量输入模块 模拟量输入模块也称为A/D模块，它将从各种工业现场传感器中采集的模拟量信号转换成CPU可以识别接收的数字量。 (2)模拟星输出模块 模拟量输出模块又称为D/A模块，简单来说就是将模拟量输入模块CPU送来的数字量转换成其他外部设备1识别接收的电压或者电流等信息。 (3)数字量模块 数字量模块的主要作用就是检查外部开关输入的状态。数字量输入输出信号是开关量信号，1或者0。 二、模拟量模块的作用 1、模拟量输入模块的主要作用是收集模拟信号。收集外部压力传感器后，在模块内部收集压力传感器收集的模拟信号,并进行相应的处理。这里的传感器数据包括电压、电流、热阻、热电偶、温度等模拟值，然后通过总线传输给计算机的智能模块。 2、模拟量输出模块的作用是通过数模转换输入的数字信号进行转换，输出可控制的连续电流和信号。 3、数字量模块:数字量模块有输入输出两种功能。如果不采用这种方法集成，可以节省更多空间,否则用户在使用时需要买两个模块，数字量模块解决了这一-问题，即:集成输入/輸出功能，-一个模块既可以输入信号也可以输出信号。 1、 Type of analog module (1) Analog input module The analog input module, also known as the A/D module, converts analog signals collected from various industrial field sensors into digital quantities that the CPU can recognize and receive. (2) Analog Star Output Module The analog output module, also known as the D/A module, simply converts the digital signal sent by the analog input module CPU into information such as voltage or current recognized and received by other external devices. (3) Digital quantity module The main function of the digital quantity module is to check the status of external switch inputs. The digital input and output signals are switching signals, 1 or 0. 2、 Functions of analog quantity module 1. The main function of the analog input module is to collect analog signals. After collecting external pressure sensors, the analog signals collected by the pressure sensors are collected inside the module and processed accordingly. The sensor data here includes analog values such as voltage, current, thermal resistance, thermocouple, temperature, etc., which are then transmitted to the intelligent module of the computer through a bus. 2. The function of the analog output module is to convert the input digital signal through digital to analog conversion, and output controllable continuous current and signal. 3. Digital module: The digital module has two functions: input and output. If this method of integration is not used, more space can be saved. Otherwise, users need to buy two modules when using them. The digital module solves this problem by integrating input/output functions, where a module can input and output signals.
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