A-404-A-23

A-404-A-23

A-404-A-23

A-404-A-23

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。

7ML5221-1BA21~6000MM     1

7ML52211BA11~6M    1

6SN1123-1AA00-0CA1   1

JZSP-CSM60-15-E   3

IC200UDR040     1

IC200UEX624    1

IC200UEM001     1

6AG4140-4BB04-3AA0 2个

6AV6643-0CD01-1AX1 2

430-2UD41-1FB0   1

6ES7312-5BF04-0AB0   2

6ES7322-1BF01-0AA0   2

6AV2 124-0GC01-0AX0   1

6AV6 643-0DD01-1AX1   2

2UCS000330A652

PSTX85-600-70

各要1个，

6AG4020-3XA21-0AX0        1

7JS6321-5EB00-3FE0/EE              1

A5E00444860          1

A5E00703754     1

307-1EA01-0AA0   2

314-6CG03-0AB0   1

6ES7221-1PL32-0XB0   块  2 

223-1PL32-0XB0

YZ311 三菱主板

SGD7S-120A00B202 安川伺服电机  1

SD822  1

140G-G-UVD面价664数量5

TSXMRPC003M数量2 面价10373

1747-L552数量1 面价78658

6AV2124-1QC02-0AX1    1   

AIG32TQ12D     2  

6ES7322-1FH00-0AA0   

6ES7331-7KB02-0AB0

6ES7153-2BA10-0XB0   各2

6SN1113-1AA00-0DA0  西门子电阻  2个

SGMMG-13ADC61   1

SGMMS-08ADC6E   1

SGMMS-08ADC6S   1

SGM7G-13AFC6C   1

SGMMS-04ADC6S   1

SGMMG-20ADC6C   1

SGM7J-04AFC6E   1

SGMMG-13ADC6C   1

SGM7G-30AFC61   1

SGM7J-08A7C6E   1

SGM7J-01AFC6E   1

SGM7J-04AFC6S   1

SGMMS-08A3C6S   1

SGMMG-13A3C61   1

SGPMS-6R0AP0A   1

SGD7S-120A00A   1

SGPMS-2R5AP0A   1

SGPMS-9R0AP0A   1

SGD7S-2R8A00A   1

SGD7S-200A00B   1

SGD7S-5R5A00A   1

SGD7S-R90A00A   1

6SE7090-0XX84-0FF5数量2

6SE7090-0XX84-0KA0数量3

212-1AB23-0XB0  数量1

 A5E00680725  5

交换机6GK5212-2BB00-2AA3 

MPL-B660F-MJ72AA   面价51693 1

7KM9900-0GA00-0AA0     1

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CUTLER HAMMER REVERSING STARTER SIZE SZ 0 COMBO A50BNV0

Eaton Cutler-Hammer Panel PRL1a-E42 PRL2a 200 AMP MAIN 30 Space breakers availab

CH Cutler Hammer Size 1 Breaker Combo Motor Starter 

Cutler-Hammer 600 Amp. 240 Volts General Duty Disconnect Catalog No. DG326FGB

CUTLER HAMMER HIGH VOLTAGE FUSE 5HLE-350E 5.5kV --NIB

CUTLER HAMMER FD3225 FD25K 225 AMP 600 VOLT 3 POLE CIRCUIT BREAKER

Cutler Hammer CHH CHH3225 225 amp 3 pole Circuit Breaker 

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