MI4-471-TC1

MI4-471-TC1

MI4-471-TC1

MI4-471-TC1

变频器运行时对PLC干扰应注意的问题

变频器运行时会对周围电气设备（包括P L C ）产生较强的电磁干扰，同时变频器主电路断路器等开关器件动作时也会影响PLC 的正常工作。为防止变频器运行时对PLC干扰，变频器与P L C 相连接时应该注意以下几点：

（1）对PLC 本身应按规定的接线标准和接地条件进行接地，而且应注意避免和变频器使用共同的接地线，且在接地时使二者尽可能分开。

（2）当电源电压波动大，谐波成分多时，为抑制谐波干扰，应在PLC 的电源模块及输入/ 输出模块的电源线上接入噪音滤波器或者隔离变压器。如果干扰仍严重，应考虑在变频器主回路中接入电抗器、变压器和噪音滤波器等措施。

（3）变频器和P L C 安装在同一电控柜时，应尽可能使与变频器有关的电缆和与PLC 有关的电缆分开安装，尤其是连接变频器的强电电缆与连接PLC 的弱电电缆更要分开安装。

4 结束语

变频器和P L C 间连接问题，涉及到数字量信号连接、模拟量信号连接以及避免干扰应注意的问题；在实际应用中，两者间的连接还涉及到用弱电信号控制强电的问题。因此，应引起重视，避免干扰造成变频器、PLC 的误动作；避免连接不当造成PLC 或变频器的损坏。

如果购买单位的在质保日期一年内发现有质量缺陷的，可以进行一个免费维修或更换。

25C-D010N114   1   面价7808

25C-D017N114   1   面价10712

800H2HAD10R7   10 19年面价6588.8

6SL3320-1TG31-0AA3 1 

A5E00314745 9 

A5E00680725 9 

6SL3060-4AJ20-0AA0 50 

VW3A7105  2

ACS550-1-01-015A-4               1

ACS550-01-015A-4

516-3AN00-0AB0         1

532-1BL00-0AA0        4

523-1BL00-0AA0

1769-l33ERM      1   面价 37403

ATV320U15N4C     1

6SL3120-2TE13-0AA4       1

6ES7531-7KF00-0AB0            1

6ES7322-5SD00-0AB0   6

6ES7870-1AB01-0YA1   2

6ES7441-2AA05-0AE0    3----------

6ES7443-1PX11-0XE0    3------------

6ES7195-1GC00-0XA0    3

6ES7212-1BB23-0XB8数量2

155-6AA00-0BN0数量1

6GK1503-3CB00    1

6ES7510-1DJ01-0AB0       1

西门子 PR0X-H472LF-PU-062L1-GID    1

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6ES7134-4MB02-0AB0  数量 1

ATV1200C-E1202118  1个

TM258LF42DT    2

TM258LD42DT   2个

3BSE042235R2     1件---------------

PP845A--------------

?BMXAM00802   2个

BMXCPS3500     1

140CRA30200   2  -----------------

6GK5991-2AB00-8AA0    10个

3BSE050091R20 PFEA112-20    2------------

西屋 westinghouse MIRO 2/16   6200057 1个

620-0057

6GK7243-1EX01-0XE0    2---------------

6EX7008-1BC41-1DC0 4*6㎜2/4*0.5㎜2=32-m   2条

S-32E3-32H

AS-25E3-25H

HWL2K0I8

HWA1K5U131（30030022）

HWL2KOM4(30020028)

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HAT1500-S 715298    

FT211

MX213

LM201

FM211

DIO232

PTAI216

LM201

ISI222

CM202

DI232

DO232

AIO288

RS204

EM203

6SL3210-1SE11-7UA0   数量：5

6SL3224-0BE31-1AA0    1

6ES7 226-6BA32-0XB0   1

ABB   SPBRC410  数量8个

XBTF034510数量1

7MB2335-0PG00-3AA1    2

A5E00338540    1

6SL3224-0BE31-1AA0    1

6SL3210-5BE27-5CV0   

6SL3210-5BE15-5UV0    各16

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