供应 TRICONEX3008
一. 抗电源干扰
在电网中的干扰信号比较强烈的情况下，**先可考虑采用隔离变压器。为了提高抗干扰效果，隔离变压器的屏蔽层必须良好接地且二次侧连接线要使用双绞线，因为双绞线能减少电源线间干扰。其次可考虑采用分离供电系统，即PLC控制器与其它设备的供电分离开来，这样也有助于抗电网干扰。
二. 控制系统的良好接地
接地的意义控制器与控制盘柜与大地之间存在着电位差，良好的接地可以减少由电位差引起的干扰电流。混入电源和输入、输出信号的干扰，可通过良好的接地引入大地，从而减少干扰的影响。良好的接地可以防止由漏电流产生的感应电压。 接地的方法系统中各台电器设备分别单独接地，严禁串联接地。强电接地网与弱电接地网单独敷设，严禁共用。接地装置的接地电阻必须在允许的范围之内。接地线应尽量粗，一般用大于4mm2的导线接地。接地线应尽量避开强电回路和主回路的电线，不能避开时，应垂直相交，尽量缩短平行走线长度。
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