IC693CPU366
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">一般情况下,PLC电源输入端接AC220V,是为了给PLC提供运行电源。PLC输出电源端口一般为DC24V,是PLC自带的电源输出。PLC使用过程中,输入端和输出端正确的接线是非常重要,接线正确是PLC工作的前提。*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">下面我们*来分析一下PLC的输入端,输出端常见的接线类型:*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">一、输入端口常见的接线类型和对象*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">PLC输入端口一般是输入:*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">1<*n style="color:red">.*n>开关量信号*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">按钮,行程开关,转换开关,接近开关,拨码开关等等。*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">举个简单的例子更加容易说清楚:*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">PLC与按钮开关接线图*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">按钮或者接近开关的接线所示:PLC开关量接线,一头接入PLC的输入端(X0,X1,X2等),另一头并在一起接入PLC公共端口(COM端)。*n>*n>*n>
IC693CPU366
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">模拟量信号*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">一般为各种类型的传感器,例如:压力变送器,液位变送器,远传压力表,热电偶和热电阻等等信号。*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">模拟量信号采集设备不同,设备线制(二线制或者三线制)不同,接线方法也会稍有不同。如图所示:*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">PLC与传感器组件的接口电路*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">(a)两线式传感器;(b)三线式传感器*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">二、输出端口接线*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">PLC输出端口接线一般可以分为以下三种情况:*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">1<*n style="color:red">.*n>继电器输出*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">2<*n style="color:red">.*n>晶体管输出*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">3<*n style="color:red">.*n>晶闸管输出*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">PLC输出方式不同,输出负载所接的电源类型也不同。如图所示:这是PLC输入端和输出端的基本接线,属于PLC基本知识。*n>*n>*n>
<*n style="font-size:14px"><*n style="color:#666666"><*n style="font-family:"Microsoft Yahei","冬青黑体简体中文 w3",宋体">三、PLC接线过程中的三点常识*n>*n>*n>
IC693CPU366
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