PLC模块1783-US06T01F

1783-US06T01F

1783-US06T01F

1783-US06T01F

联系人：王卿

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：2851195464

接地是提高电子设备电磁兼容性的有效手段之一。PLC控制系统的地线包括系统地、屏蔽地、交流地和保护地等。接地系统混乱对PLC系统的干扰主要是各个接地点电位分布不均，不同接地点间存在地电位差，引起地环路电流，影响控制系统内逻辑电路和模拟电路的正常工作。

完善的接地系统是PLC控制系统抗电磁干扰的重要措施之一。信号源接地时，屏蔽层应在信号侧接地；不接地时，应在PLC侧接地；信号线中间有接头时，屏蔽层应牢固连接并进行绝缘处理，要避免多点接地；多个测量点信号的屏蔽双绞线与多芯对绞总屏电缆连接时，各屏蔽层应相互连接好，并经绝缘处理。

接地时应注意：接地线应尽量粗，一般用大于2mm2的铜芯线接地；接地点应尽量靠近PLC控制器，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的长度。

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