模拟量输入模块就是一款将远程现场的模拟量信号采集到计算机的设备，模拟量是表示了在一定的范围内所连续变化的任意取值，表示和数字量是相对立的一个状态，一般情况下模拟量是用来采集，还有表示事物的电压电流或者是频率等等参数的。所以也说过它就是用来采集模拟量，比如说像电压电流，或者是温度等等这些数值的，然后再通过RS485总线传输到电脑上的智能模块。
在实际生产中模拟量控制技术得到了较为广泛的应用，并且已经成为了自动化行业与机器设备中的重要部件了。平时的信号采集中模拟量是重要来源，跟我们普通的IO控制是有区别的，就像众山科技的ZSDR3411-RTU，这是开关量输入模块，而且这些个信号要么就是0，不然就是1。如果是对模拟量信号来说，就不是单纯的0或1了，它是一个连续变化的数值。就像说温度信号、流量信号、位移信号等等，这些都不是单纯的开或者是关，则都是个连续变化的量。
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The analog input module is a device that collects analog signals from remote sites to a computer. Analog signals represent arbitrary values that continuously change within a certain range, representing a state that is opposite to digital signals. Generally, analog signals are used to collect and represent parameters such as voltage, current, or frequency of things. So it has also been said that it is used to collect analog quantities, such as voltage, current, or temperature, and then transmit them to the intelligent module on the computer through the RS485 bus.
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Analog control technology has been widely applied in practical production and has become an important component in the automation industry and machine equipment. Analog signals are an important source of signal acquisition in daily life, which is different from our ordinary IO control, such as ZSDR3411-RTU from Zhongshan Technology. This is a switch input module, and these signals are either 0 or 1. If it is for analog signals, it is not simply 0 or 1, it is a continuously changing numerical value. Just like temperature signals, flow signals, displacement signals, and so on, these are not simply on or off, they are all continuously changing quantities.
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