ALLEN-BRADLEY6 1756-BA2 配件

318169-C02
MVME5100
HPU6800PIC-566
1326AB-B740C-S2L
6DP1280-8AB
Triconex 3625
MVME374-1
IC698PSA100
1756-L61B
2093-AC05-MP5
1769SC-IF8U

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描述

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,它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、交直流传动装置引起的谐波、电网短路暂态冲击等,都通过输电线路传到电源原边。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。

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