A5E00714565

A5E00714565

A5E00714565

A5E00714565

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。

6ES7518-4AP00-0AB0    2台

6ES7138-6BA00-0BA0  20

6ES7138-6AA00-0BA0  10

6GK5204-2BB10-2AA0  5

6GK5204-2BB10-2AA3

6ES7155-6AU00-0CN0  5

6AG4140-7BL04-0DK0  1

AB 889N-F4AFC-12F     6    面价340

AB 1485C-P3N5-M5     6    面价647

AB 1485G-P5M5-R5     6   面价714

AB 1732D-16CFGM12MN 6   面价4873

516-3AN00-0AB0   1--------------

1756-OF8IH – 2   39933

1756-A4 – 2   4250

A2424NJ-DB – 1 UNIT

ABB 1SCA022185R9850 – 1 UNIT

LEUZE LSSRL 8.9-S12 / 50036358 – 4 UNITS

LEUZE LSERL 8/24.01-S12 / 50036359 – 4 UNITS

LEUZE BT 8-ARH / 50035030 – 4 UNITS

LEUZE KD M12A-5P-5M-FAB / 50104576 – 4 UNITS

LEUZE LSS 96M-120W-43 / 50031574 – 2 UNITS 美国

sk-g9-scr1-f6   AB变频器附件  数量1 5973

6ES7 315-2EH14-0AB0  4个 要2021年6月之后的-----------------

TWDAMI4HT      2

TWDAMI4LT   

6RA8013-6DV62-0AA0   1个--------------

6GK5615-0AA00-2AA2  15台

6AG1307-1EA01-7AA0   5

6AG1314-1AG14-7AB0  5

CIMR-HF5S27P5C       1

功率单元   HD9M-A069-0130-50000B          1

SGDM-08AC-SD2B   1

TWDAMI4HT   2

6AU1400-2PA01-0AA0   2

LDZ10500424.140   2

6EP4438-7FB00-3DX0数量7

RMS-9 MicroVersatrip 数量1  ABB    规格型号：241239122-010-12   数量：1

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