ATV32HU75N4

ATV32HU75N4

ATV32HU75N4

變頻器運行時對PLC干擾應注意的問題

變頻器運行時會對周圍電氣設備（包括P L C ）產(chǎn)生較強的電磁干擾，同時變頻器主電路斷路器等開關器件動作時也會影響PLC 的正常工作。為防止變頻器運行時對PLC干擾，變頻器與P L C 相連接時應該注意以下幾點：

（1）對PLC 本身應按規(guī)定的接線標準和接地條件進行接地，而且應注意避免和變頻器使用共同的接地線，且在接地時使二者盡可能分開。

（2）當電源電壓波動大，諧波成分多時，為抑制諧波干擾，應在PLC 的電源模塊及輸入/ 輸出模塊的電源線上接入噪音濾波器或者隔離變壓器。如果干擾仍嚴重，應考慮在變頻器主回路中接入電抗器、變壓器和噪音濾波器等措施。

（3）變頻器和P L C 安裝在同一電控柜時，應盡可能使與變頻器有關的電纜和與PLC 有關的電纜分開安裝，尤其是連接變頻器的強電電纜與連接PLC 的弱電電纜更要分開安裝。

4 結束語

變頻器和P L C 間連接問題，涉及到數(shù)字量信號連接、模擬量信號連接以及避免干擾應注意的問題；在實際應用中，兩者間的連接還涉及到用弱電信號控制強電的問題。因此，應引起重視，避免干擾造成變頻器、PLC 的誤動作；避免連接不當造成PLC 或變頻器的損壞。

如果購買單位的在質保日期一年內(nèi)發(fā)現(xiàn)有質量缺陷的，可以進行一個免費維修或更換。

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MN-COM1S    2

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SIGA-CT1    1

ESR-3/3-LCD     1

3-ANNCPU3    2

FBM224    2

IC693ALG392    1

IC693ALG223    1

FC4A-D20RK1    2

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C9200L-24T-4G-E    1

ASR-920-12SZ-IM    1

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IC694APU300    1

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IC694PWR330    1

VTIPG-HMI    1

IC695LRE001    1

IC695GCG001    1

6SE7026-0TD61-Z     1

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C7027A 1049   2

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3BHB005885R0089   1

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Analog Devices V Input Conditioning Module M3B31-03

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ANALOG DEVICES ISOLATED WIDEBAND V INPUT MODULE 3B41-00

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Allen-Bradley SLC500 Input Module 1746-IB16 SER C 10-30VDC

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Allen-Bradley SLC500 Input Module 1746-IB16

Allen-Bradley SLC500 Input Module 1746-IA16. Series C.

Allen-Bradley SLC500 Input Module 1746-IA16 Series B

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ALLEN-BRADLEY SLC500 1746-IA16 INPUT MODULE SERIES B

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Allen-Bradley SLC 500 Series B Input Module

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ALLEN-BRADLEY SLC 500 INPUT MODULE 1746-IV32

Allen-Bradley SLC 500 Input Module 1746-IV16 

ALLEN-BRADLEY SLC 500 INPUT MODULE 1746-IV16

ALLEN-BRADLEY SLC 500 INPUT MODULE 1746-IB8

Allen-Bradley SLC 500 Input Module 1746-IB16 Ser C

Allen-Bradley SLC 500 Input Module 1746-IB16 

ALLEN-BRADLEY SLC 500 INPUT MODULE 1746-IB16

ALLEN-BRADLEY SLC 500 INPUT MODULE 1746-1A16 SERIES B

ALLEN-BRADLEY SLC 500 INPUT MODULE  1746-1B16  SER -C

Allen-Bradley SLC 500 1746-NT4 Ser B Thermocouple/mV Input Module 7090

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ALLEN-BRADLEY SLC 500 1746-IV16 INPUT MODULE SER C 

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Allen-Bradley SLC 500 1746-IB32 C Input Module PLC

Allen-Bradley SLC 500 1746-IB16 Input Module  Ser. B 

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Allen-Bradley SLC 500 1746-IA16 Ser B Input Module 7095

ALLEN-BRADLEY SLC 500 1746-IA16 INPUT MODULE SER C 

Allen-Bradley SLC 500 1746-IA16 Input Module 120V  WOW

Allen-Bradley SLC 500 1746-IA16 Input Module  Ser. A 

Allen-Bradley SLC 500 1746-IA16 115 VAC Input Module

Allen-Bradley SLC 500  Cat. 1746-NI4 Analog Input Module. Series: A W

Allen-Bradley SLC 500  Cat. : 1746-IB16 Input Module. Series: C 

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Allen-Bradley Input Module 634173-90_63417390_634173-9O_6341739O_Rev 7_9-38

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Allen-Bradley Input Module 1771-IAD  

Allen-Bradley INPUT MODULE 1746-NI4

Allen-Bradley Input Module 1746-ITB16

Allen-Bradley Input Module 120V 1771-IA2  

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