INPCT01

INPCT01

INPCT01

INPCT01

4、 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。

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DCS401 2-quadrant converter 两象限；Enclousure 防护等级 : IP00

DCS401.0020 3ABD00007734 A1机座模块 

DCS401.0045 3ABD00007735 A1机座模块 

DCS401.0065 3ABD00007736 A1机座模块 

DCS401.0090 3ABD00007737 A1机座模块 

DCS401.0125 3ABD00007738 A1机座模块 

DCS401.0180 3ABD00007739 A2机座模块 

DCS401.0230 3ABD00007740 A2机座模块 

DCS401.0315 3ABD00007741 A3机座模块 

DCS401.0405 3ABD00007742 A3机座模块 

DCS401.0500 3ABD00007743 A3机座模块 

DCS401.0610 3ABD00007744 A4机座模块 

DCS401.0740 3ABD00007745 A4机座模块 

DCS401.0900 3ABD00008708 A4机座模块 

DCS402 4-quadrant converter 四象限；Enclousure 防护等级 : IP00

DCS402.0025 3ABD00007746 A1机座模块 

DCS402.0050 3ABD00007747 A1机座模块 

DCS402.0075 3ABD00007748 A1机座模块 

DCS402.0100 3ABD00007749 A1机座模块 

DCS402.0140 3ABD00007750 A1机座模块 

DCS402.0200 3ABD00007751 A2机座模块 

DCS402.0260 3ABD00007752 A2机座模块 

DCS402.0350 3ABD00007753 A3机座模块 

DCS402.0450 3ABD00007754 A3机座模块 

DCS402.0550 3ABD00007755 A3机座模块 

DCS402.0680 3ABD00007756 A4机座模块 

DCS402.0820 3ABD00007757 A4机座模块 

DCS402.1000 3ABD00008709 A4机座模块 

模块型号Converter Type 电抗器型号

DCS401.0020 DCS402.0025 ND01

DCS401.0045 DCS402.0050 ND02

DCS401.0065 DCS402.0075 ND04

DCS401.0090 DCS402.0100 ND05

DCS401.0125 DCS402.0140 ND06

DCS401.0180 DCS402.0200 ND07

DCS401.0230 DCS402.0260 ND07

DCS401.0315 DCS402.0350 ND09

DCS401.0405 DCS402.0450 ND10

DCS401.0500 DCS402.0550 ND10

DCS401.0610 DCS402.0680 ND12

DCS401.0740 ND12

DCS402.0820 ND13

DCS401.0900 DCS402.1000 ND13

DCS401.0020 DCS402.0025 NF3-440-25

DCS401.0045 DCS402.0050 NF3-440-50

DCS401.0065 NF3-440-64

DCS402.0075 NF3-440-80

DCS401.0090 DCS402.0100 NF3-440-80

DCS401.0125 DCS402.0140 NF3-440-110

DCS401.0020 DCS402.0025 NF3-500-25

DCS401.0045 DCS402.0050 NF3-500-50

DCS401.0065 NF3-500-64

DCS402.0075 NF3-500-80

DCS401.0090 DCS402.0100 NF3-500-80

DCS401.0125 DCS402.0140 NF3-500-110

DCS401.0180 DCS402.0200 NF3-500-320

DCS401.0230 DCS402.0260 NF3-500-320

DCS401.0315 DCS402.0350 NF3-500-320

DCS401.0405 DCS402.0450 NF3-500-600

DCS401.0500 DCS402.0550 NF3-500-600

DCS401.0610 DCS402.0680 NF3-500-600

DCS401.0740 DCS402.0820 NF3-690-1000

DCS401.0900 DCS402.1000 NF3-690-1000

现场总线通讯适配器可选模块

型号 Type 订货号

NPBA-12(V1.4 or later) for PROFIBUS 3ABD64348221

NCAN-02(V2.3 or later) for CANOpen 3ABD64286731

NDNA-02(V2.4 or later) for Device-Net 3ABD64286765

NMBA-01(V1.7 or later) for Modbus 3ABD58919390