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一、概述过程输出通道的功能是将计算机的输出代码变换成相应的信号直接控制执行机构。由于控制对象所需信号种类不一样,因而过程输出通道包括有模拟量输出通道、开关量输出通道、数字量输出通道以及脉冲量输出通道等几种类型。计算机用于过程控制系统,过程输出通道是不可缺少的重要部分。象过程输入通道一样,依现场所需,过程输出通道也分成隔离型和非隔离型两类。
First, an overview Process output channel function is to transform the computer’s output code into the corresponding signal direct control of the implementing agencies. Due to the different signal types required by the control object, the process output channels include analog output channels, digital output channels, digital output channels, and pulse output channels. Computer for process control system, process output channel is an indispensable part. Like process input channels, the process output channels are also divided into isolated and non-isolated types, as required by the site.