C79040-A7520-C386-03-86_厦门海通华业科技有限公司

C79040-A7520-C386-03-86

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。

IC693PWR322

IC693MDL241

IC693MDL930

IC693PWR324Z

IC693CPU 374-HW

IC693MDR390C

IC693NIU004-FD

IC693MDL645J

IC693ALG222E

IC693MDL740K

IC693MDL940M

IC693ALG392C

IC693APU300 各1

mhmf022l1u2m

mcdln15se 二手各1

3UG4614-1BR20-AC160-690V 4

伺服电机电机R2AA18450HCPA0(三洋)：2个

驱动器(电机) RS2A15A0KA4(山洋)：1个------------------

6ES7 400-1TA01-0AA0 ---------------

6ES7 407-0KA02-0AA0 ----------------

6ES7 412-2XJ05-0AB0 --------------------

6ES7 952-1KL00-0AA0-----------------

6GK7 443-1EX20-0XE0---------------------

6ES7 421-1BL01-0AA0 ------------------

6ES7 422-1BL00-0AA0 ----------------------

6ES7 431-0HH00-0AB0 -----------------------

6ES7 432-1HF00-0AB0 ----------------------

AE12B-5705 1

AI523 1

AX522 1

A06B-2255-B403 1

A06B-2253-B000 1

IC693CPU374-----------------

1756-L72-----------------

1SFB536068D1011----------------

ACS850-04-041A-5+J400 1个

FX3U-4DA

FX2N-8AD

FX2N-80MR

FX2N-48ET

GT1695M-XTBA----------------------

GT1695M-XTBD 各1只-----------------

Lenze EVS9322EP 8个

网测IGBT WF16AK1Z15 1个

内部I/O接口 WF16AK1I1 2个

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流量仪控制板 FK-FE-3KXF065094U0100.XZ 1

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SF-CZ-S1 2

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9905-867 1

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D4V-8108SZ-N 5

NX1P2-1040DT 1

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1746-NI4 Allen Bradley SLC 500 Analog Input Module 1746NI4 D59

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1746-IB32/C Allen Bradley SLC 500 DC Input Module 1746IB32 D-54

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1746-IB16 INPUT MODULE

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1746-IA16/B Allen Bradley SLC 500 AC Input Module 1746IA16 D45

1746-IA16 Series C Allen Bradley 16pt SLC-500 Input Module

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1746-IA16 Allen Bradley 16pt SLC-500 Input Module

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14813 Potter and Brumfield IAC-5 Input Module

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140-DDI-841-00 Modicon TSX Quantum Input Module 140DDI84100 16pt Input

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12 refurbished from: 315.00

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