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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。

EUROTHERM CONTROLS T700-0001 NSFP T7000001

EUROTHERM 2204FM TEMPERATURE CONTROL 2204/NS/VH/XX/XX/RF/RF/XX/YM/XXX//AU91

EUROTHERM CONTROLS TE10S/16A/240V/LGC/PLF/96/ NSFP TE10S16A240VLGCP

EUROTHERM CONTROLS AS1/10A/120V/4-20MA11 USPP AS110A120V420MA

EUROTHERM DRIVES LA048357 USPP LA048357

EUROTHERM CONTROLS, 2216E/CC/VH/L1/DB/1AM/ENG R/0/1200

Eurotherm EM1 Alarm Logic Module EMA/ALM//

EUROTHERM CONTROLS 2132I/AL/VH/ENG NSPP 2132IALVHENG

EUROTHERM CONTROLS TE10S/40A/480V/LGC/PLF/96/ NSPP TE10S40A480VLGCP

Eurotherm 919 Temperature Controller 

EUROTHERM CONTROLS Q510-0B06 USPP Q5100B06

EUROTHERM DRIVES AH04682IU002-MD5 NSPP AH04682IU002MD5

EUROTHERM CONTROLS TE10S/40A/480V/LGC/PLF/ NSPP TE10S40A480VLGC1

EUROTHERM CONTROLS TCS7301000 NSFP TCS7301000

EUROTHERM POWER CONTROLLER / AKKC406 / INDICATED ONLY

EUROTHERM MODEL #94 # 94 TEMPERATURE CONTROLLER 4002587

EUROTHERM CONTROLS 7100A-16A/230V/SELF/XXXX/NONE/PA/XXXX/0V10/ENG/NONE/////////N

EUROTHERM 917/ZCP/J32-800F CONTROLLER 917ZCPJ32800F SERIAL NO. 8308-669

EUROTHERM CONTROLS TE10S/50A/240V/LGC/ENG/IPF/NONE/-//00 USPP TE10S50A240VLGC1

EUROTHERM CONTROLS TE10S/50A/240V/LGC/ENG/IPF/96/00 USPP TE10S50A240VLGCE

EUROTHERM HEAVY DUTY CHART RECORDER

EUROTHERM CONTROLS 2216E/NS/VH/L1/XX/RF/2XX/XXX/XXXXX/EU0523 NSFP 2216ENSVHL1XXR

EUROTHERM 2216E TEMPERATURE CONTROLLER 2216E/CC/VH/L1/R1/XX/2XX/ENG/XXXXX/XXXXXX

EUROTHERM 808-L1-R1-R1-0-0-QL-EZDC265 TEMPERATURE CONTROL ***XLNT***

EUROTHERM 808-L1-R1-R1-0-0-QS-EZDC265 TEMPERATURE CONTROL ***XLNT***

EUROTHERM 808-L1-0-R1-0-0-QLZ-AZEC205-CE TEMPERATURE CONTROL ***XLNT***

EUROTHERM 808-L1-R1-R1-0-0-QS-EZDC265-@AL43 TEMPERATURE CONTROL ***XLNT***

EUROTHERM 808-L1-0-R1-0-0-QLS-(AZEC205)-CE TEMPERATURE CONTROL ***XLNT***

EUROTHERM 808-L1-0-R1-0-0-QLS-(AZEC205)-CE-AS142 TEMPERATURE CONTROL ***XLNT***

EUROTHERM CONTROLS TE10S-16A/240V/LGC/ENG/PLF//NOFUSE/-//00 USPP TE10S16A240VLGC

EUROTHERM 2108i Indicator & Alarm Unit PROCESS CONTROLLER PT100

Enlarge

EUROTHERM CONTROLS 2132I/AL/VH/ENG USPP 2132IALVHENG

EUROTHERM CONTROLS TE10S/40A/480V/LGC/PLF/96/ USPP TE10S40A480VLGCP

EUROTHERM CONTROLS TE10S/40A/240V/LGC1 USPP TE10S40A240VLGC1

EUROTHERM CONTROLS TE10S/40A/240V/LGC/00 USPP TE10S40A240VLGC0

EUROTHERM CONTROLS 2216E/NS/VH/L1/XX/RF/2XX/ENG/XXXXX/EU0523 USPP 2216ENSVHL1XXR

EUROTHERM 2132-CC-VH-ENG-----LH-FH-K-0-1200-C-R7-XX-ENG TEMPERATURE CONTROLLER

EUROTHERM 2132-CC-VH-ENG-----LH-FH-K-0-1200-C-R7-XX TEMPERATURE CONTROLLER

Eurotherm 4180 Display Circuit Board Type# AH248023!

Eurotherm 3208 PID Oven Controller

Eurotherm AH388006U004 Control Board

Lot of 3 Eurotherm Solid State Relays Model# TE10S!

EUROTHERM 917/SCT/J/32 TEMPERATURE CONTROL REPAIRED

EUROTHERM TEMPERATURE CONTROL

EUROTHERM TEMPERATURE CONTROLLER COMMS DEVICE NET

EUROTHERM TEMPERATURE CONTROLLER TRIAC,LOGIC,LOGIC OUTPUT BOARD 

EUROTHERM CONTROLS TE10S25A/240V/HAC/ENG *NEW*

EUROTHERM CONTROLS TE10S/40A/240V/HAC/00/

EUROTHERM CONTROLS TE10S/50A/240V *NEW*

Eurotherm AS1/20A240V/120V/PLF SCR Control **SEALED**

EUROTHERM 927/VM/J/32-800F/P100/VP/115V/X USED 927VMJ32800FP100VP115VX 

PRECISION TEMPERATURE CONTROLLER EUROTHERM

Eurotherm Controls TE10S SS Contactor

EUROTHERM TEMPERATURE CONTROL 984 USED 984/4-20MA/0-2500F/P10

Eurotherm Dual EMD/DM/LGC/J/999F/LGC/J/999F// used

Eurotherm 2404 Temperature Controller

INDRAMAT MAC112B-0-LD4-C/130-A-0/W1520LV/S005  MAC112B0LD4C130A

INDRAMAT KDS-1.3-100-300-W1/S104  KDS13100300W1S10

INDRAMAT KDS1.1-100-300-W1-220  KDS11100300W1220

INDRAMAT DSC3.1-150-115  DSC31150115

IMAJE ENM20332  ENM20332

HORIBA FIA-23A  FIA23A

HONEYWELL FF-SEDGE6G2-1  FFSEDGE6G21

HONEYWELL 51400855-100  51400855100

GIDDINGS & LEWIS M.1018.3035  M10183035

GIDDINGS & LEWIS 502-03963-60  5020396360

GETTYS M122-B3BA-900F  M122B3BA900F

GETTYS 110-232  110232

GENERAL ELECTRIC SPM-0-0  SPM00

GENERAL ELECTRIC 125D4413G3  125D4413G3

GENERAL ELECTRIC 125D4325G2  125D4325G2

GENERAL ELECTRIC 125D3644G2  125D3644G2

GE FANUC IC3606SPCC1H  IC3606SPCC1H

GE FANUC IC3606SPCC1D  IC3606SPCC1D

GE FANUC IC3600SSVA1  IC3600SSVA1

FOXBORO D0148MP  D0148MP

FOXBORO B0133LA  B0133LA

FISHER ROSEMOUNT 01984-4164-0004  0198441640004

FANUC A20B-0007-0010  A20B00070010

FANUC A20B-0005-0711  A20B00050711

FANUC A16B-0190-0170  A16B01900170

FANUC A06B-6059-H208  A06B6059H208

FANUC A06B6059C212  A06B6059C212

FANUC A06B-6058-H007  A06B6058H007

FANUC A06B-6050-H004  A06B6050H004

FANUC A06B-6050-H002  A06B6050H002

FANUC A06B-1003-B100  A06B1003B100

FANUC A06B-0651-B011  A06B0651B011

FANUC A06B-0651-B005  A06B0651B005

FANUC A06B-0502-B751  A06B0502B751

FANUC A06B-0368-B231  A06B0368B231

EG&G 15-1  151

DOLAN JENNER SS7B481MDO  SS7B481MDO

DOHRMANN 14-7045-000  147045000

CUTLER HAMMER SV9015AC-5M0B00  SV9015AC5M0B00

CUTLER HAMMER P3BDK3400GN  P3BDK3400GN

CUTLER HAMMER NS360900A  NS360900A

CUTLER HAMMER DH363UWK316  DH363UWK316

CUTLER HAMMER 92-01815-03  920181503

CUTLER HAMMER 92-00420-04  920042004

CONTROL TECHNIQUES MGE-4120-CONS-0000  MGE4120CONS0000

CONTROL TECHNIQUES FX-6120  FX6120

COMPUMOTOR MPM1902FRMM-963  MPM1902FRMM963

COGNEX IS5100-10  IS510010

COGNEX 800-5855-1B  80058551B

CISCO UCS-IOM-2208XP  UCSIOM2208XP

BARDAC PLX15/36  PLX1536

BARDAC PLX115/270  PLX115270

BALDOR ZD18H440-EO-D  ZD18H440EOD

BALDOR MB7-160-AB  MB7160AB

BALDOR ID15H450-EO  ID15H450EO

ASEA BROWN BOVERI R58113972  R58113972

ASEA BROWN BOVERI OETL-NF1600SW  OETLNF1600SW

ASEA BROWN BOVERI 57771224  57771224

ASEA BROWN BOVERI 57520001-EV/9  57520001EV9

ASEA BROWN BOVERI 57310001-CX/5  57310001CX5

ASEA BROWN BOVERI 57310001-CX  57310001CX

ASEA BROWN BOVERI 3BSE005831R1  3BSE005831R1

ANN ARBOR 01940130  01940130

AMS CONTROLS MP304CL  MP304CL

ALLEN BRADLEY SP-502979  SP502979

ALLEN BRADLEY MPL-B560F-MK24AA  MPLB560FMK24AA

ALLEN BRADLEY 6500-PS7DSP  6500PS7DSP

ALLEN BRADLEY 6160-PCN1  6160PCN1

ALLEN BRADLEY 6153-NHBEFICBCDZ  6153NHBEFICBCDZ

ALLEN BRADLEY 570-DOB-47  570DOB47

ALLEN BRADLEY 505-EOD-23  505EOD23

ALLEN BRADLEY 2711-T9A2  2711T9A2

ALLEN BRADLEY 1775-S5  1775S5

ALLEN BRADLEY 1771-QI  1771QI

ALLEN BRADLEY 1771-NIS  1771NIS

ALLEN BRADLEY 1771-NB4S  1771NB4S

ALLEN BRADLEY 1756-RM FNFP 1756RM

ALLEN BRADLEY 1756-L62  1756L62

ALLEN BRADLEY 1755-L1  1755L1

ALLEN BRADLEY 152873  152873

ALLEN BRADLEY 150-B24NBDD  150B24NBDD

ALLEN BRADLEY 1395-B72-D2-P12-P51-X1  1395B72D2P12P51X

ALLEN BRADLEY 1395-B69-C1-P51-X1  1395B69C1P51X1

ALLEN BRADLEY 1394C-AM75-IH  1394CAM75IH

ALLEN BRADLEY 1391B-ESAA15-AQB  1391BESAA15AQB

ALLEN BRADLEY 1391B-AA15  1391BAA15

ALLEN BRADLEY 1388-AV60  1388AV60

ALLEN BRADLEY 1336VT-B050-EAS-FA2-L1  1336VTB050EASFA2

ALLEN BRADLEY 1336S-B030-AN-EN5  1336SB030ANEN5

ALLEN BRADLEY 1336S-B015-AA-EN-HA2-L6  1336SB015AAENHA3

ALLEN BRADLEY 1336S-B015-AA-EN-HA2-L5  1336SB015AAENHA2

ALLEN BRADLEY 1336-C010-EAD-FA2  1336C010EADFA2

ALLEN BRADLEY 1336-BDB-SP20D  1336BDBSP20D

ALLEN BRADLEY 1336-B030-EAF-S1  1336B030EAFS1

ALLEN BRADLEY 1336-B007-EAD-S1  1336B007EADS1

ALLEN BRADLEY 1326AB-C4C-11  1326ABC4C11

ALLEN BRADLEY 1326AB-C4B-11  1326ABC4B11

ALLEN BRADLEY 1326-ABC2F-11  1326ABC2F11

ALLEN BRADLEY 1326AB-C2E-11-K7  1326ABC2E11K7

ALLEN BRADLEY 1326AB-B410G-21-K4  1326ABB410G21K4

ALLEN BRADLEY 1326AB-B2E11A5  1326ABB2E11A5

ALLEN BRADLEY 1300-GTWY  1300GTWY

ACCURAY 061589-002  061589002