IC697CHS790-F

IC697CHS790-F

IC697CHS790-F

IC697CHS790-F

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。

FX3GA-60MR数量1

842D-60131331BDA   1个 面价 10848

288-1ST40-0AA0    1

103-770-3240 数量1

A06B-6078-H202     1----------------

YM-7381C  INPUT 380W 5

TWDLCAA24DRF    5

NC601  RS232/422/485  10/100M Ethernet 康海 2

FX3U-80m 三菱 个 1

5069-L306ER 面价11413 2

5069-RTB64-SCREW 面价300.58 2

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1769-AENTR AB 台 2  

1606-XLB120E 面价858.8  2

1585J-M8HBJM-1 面价328.83 2

1585J-M8HBJM-2 面价374      2

2711P-T7C22D8S 面价14238 2

5069-L306ER 面价11413 2

CR-M220DC4 ABB 个 5

CR-M024DC4 ABB 个 5

CR-M230AC3 ABB 个 5

CR-M3SS 10

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H3CR-A-DC24V 2

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XJ3-G 正泰 个 2

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1794-IF2XOF2I      面价  9706

430-2UD31-5CA0      1

A5E00714565    1

DV88040LDMB 数量1

FC-102N250T4E54H4XGC3XXSXXXXALBXCXXXXD0/250KW/380V/Type12/IP54/40℃???1个 丹佛斯

FRN7.5G1S-4CX   1

FRN3.7G1S-4C   2

FRN7.5G11S-4CX   2

TP-G1-C1 中文面板   5

FRN7.5G1S-4CX   2

FX3U-40MR/ES-A   1

FX3U-48MR/ES-A   1

FX3U-48MT/ES-A   1

FX3U-64MT/ES-A   1

FX3G-24MR/ES-A   1

电源模板MDD050-24  数量：2

MSMA012A1N  1

MUMS022C2V1S            1

416851G    1

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HEIDENHAIN的型号：689888-20   数量：1个

4603N1345E100         1

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SM-63xE1       1

SEMH-63xE1       1

OM9352AEX1     1

OM9352ALX1     1

TNW1FAN01    2

LS-5120-28P-SI-H3；含光模块1*SFP-GE-SX-MM850-A   1

ZKG-10PAU 4个

ZKG-20PAU 4个

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IB801/022    5

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