模拟输入模块是一种智能模块，可以采集电压、电流、热电偶、热阻、温度等模拟值，并通过485总线传输给计算机。 模拟输出模块的主要功能实际上是将输入的数字信号转换成数模，输出可调的连续电压、电流和信号。 比如在电视控制块中对各种模拟量的控制，如果以伴音为例，先将遥控器或按键扫描发出的脉冲数字信号输入到控制块中，经过模拟输出模块的数模转换后，输出可随输入信号变化的连续电压信号，然后利用该信号控制伴音通道，从而控制音量、亮度和对比度 The analog input module is an intelligent module that can collect analog values such as voltage, current, thermocouple, thermal resistance, temperature, etc., and transmit them to the computer through the 485 bus. The main function of the analog output module is actually to convert the input digital signal into a digital analog, and output adjustable continuous voltage, current, and signal. For example, in the control of various analog quantities in the TV control block, taking accompanying sound as an example, the pulse digital signal emitted by the remote control or button scanning is first input into the control block, and after the analog-to-analog conversion of the analog output module, a continuous voltage signal that can change with the input signal is output. Then, this signal is used to control the accompanying sound channel, thereby controlling the volume, brightness, and contrast
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