DSQC539

DSQC539

DSQC539

 PLC系统分为逻辑电路接地和功率电路接地，有共地、浮地及机壳共地和电路浮地等三种方式。一般采用控制器与其它设备分别接地方式最好，接地时注意:接地线尽量粗，一般大于2mm2的线接地;接地点应尽量靠近控制器，接地点与控制器之间的距离不大于50m;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，应尽量缩短平行走线的长度。
实践证明，接地往往是抑制噪声和防止干扰的重要手段，良好的接地方式可在很大程度上抑制内部噪声的耦合，防止外部干扰的侵入，提高系统的抗干扰能力。

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