1783-SRKIT

1783-SRKIT

1783-SRKIT

1783-SRKIT

(2) 来自系统外引线的干扰
主要通过电源和信号线引入，通常称为传导干扰。这种干扰在我国工业现场较严重。
(3)来自电源的干扰
实践证明，因电源引入的干扰造成PLC 控制系统故障的情况很多，笔者在某工程调试中遇到过，后更换隔离性能更高的PLC 电源，问题才得到解决。
PLC 系统的正常供电电源均由电网供电。由于电网覆盖范围广，
将受到所有空间电磁干扰而在线路上感应电压和电路。尤其是电网内部的变化，入开关操作浪涌、大型电力设备起停、交直流转动装置引起的谐波、电网短路暂态冲击等，都通过输电线路到电源边。PLC 电源通常采用隔离电源，但其机构及制造工艺因素使其隔离性并不理想。实际上，由于分布参数特别是分布电容的存在，***隔离是不可能的。

＆ 公司全称  ： 厦门泰尼电气有限公司
＆ 销售代表  ： 小黄
＆ 洽谈电话  ：  0592-6809319
＆手机：18950191386
＆ 商务 ***   ：  2917675397
＆ 传真（FAX)：  0592-6890859 （请注明，01006收）
＆ 公司地址  ：  厦门市海沧区海沧街道滨湖一里7号
＆ 公司网址  ：  www.xmtaini.com

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