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，绝对隔离是不可能的。From
Item image
P0400YC REV 0V FBM 02 FOXBORO THERMOCOUPLE/MV INPUT MODULE SL No 1898148847
1 737 47
Buy It Now
+ 416 99 shipping
Watch
From
Item image
P0400YC REV 0X FBM 02 FOXBORO THERMOCOUPLE / MV INPUT MODULE SL No 1899100849
1 737 47
Buy It Now
+ 416 99 shipping
Watch
From
Item image
P0400YC REV 0X FBM 02 FOXBORO THERMOCOUPLE / MV INPUT MODULE SL No 1899100854
1 737 47
Buy It Now
+ 416 99 shipping
Watch
From
Item image
P0400YC REV 0X FBM 02 FOXBORO THERMOCOUPLE / MV INPUT MODULE SL No 1898420161
1 737 47
Buy It Now
+ 416 99 shipping
Watch
From
Item image
P0400YC REV 0X FBM 02 FOXBORO THERMOCOUPLE / MV INPUT MODULE SL No 1899100841
1 737 47
Buy It Now
+ 416 99 shipping
Watch
From
Item image
P0400YC REV 0X FBM 02 FOXBORO THERMOCOUPLE / MV INPUT MODULE SL No 1898420169
1 737 47
Buy It Now
+ 416 99 shipping
Watch
From
Item image
P0400YC REV 0X FBM 02 FOXBORO THERMOCOUPLE / MV INPUT MODULE SL No 1899100843
1 737 47
Buy It Now
+ 416 99 shipping
Watch
From
Item image
P0400YC REV 0X FBM 02 FOXBORO THERMOCOUPLE / MV INPUT MODULE SL No 1898420167
1 737 47
Buy It Now
+ 416 99 shipping
Watch
产品名称：W10401258 优势现货
产品手机链接：http://m.vooec.com/product_220604325.html
产品网站链接：http://www.vooec.com/cpshow_220604325/