620-0080
620-0080
620-0080
1.概述
隨著科學(xué)技術(shù)的發(fā)展，PLC在工業(yè)控制中的應(yīng)用越來越廣泛。PLC控制系統(tǒng)的可靠性直接影響到工業(yè)企業(yè)的安全生產(chǎn)和經(jīng)濟(jì)運(yùn)行，系統(tǒng)的抗干擾能力是關(guān)系到整個(gè)系統(tǒng)可靠運(yùn)行的關(guān)鍵。自動(dòng)化系統(tǒng)中所使用的各種類型PLC，有的是集中安裝在控制室，有的是安裝在生產(chǎn)現(xiàn)場(chǎng)和各電機(jī)設(shè)備上，它們大多處在強(qiáng)電電路和強(qiáng)電設(shè)備所形成的惡劣電磁環(huán)境中。要提高PLC控制系統(tǒng)可靠性，設(shè)計(jì)人員只有預(yù)先了解各種干擾才能有效保證系統(tǒng)可靠運(yùn)行。
2.電磁干擾源及對(duì)系統(tǒng)的干擾是什么？
影響PLC控制系統(tǒng)的干擾源于一般影響工業(yè)控制設(shè)備的干擾源一樣，大都產(chǎn)生在電流或電壓劇烈變化的部位，這些電荷劇烈移動(dòng)的部位就是噪聲源，即干擾源。
干擾類型通常按干擾產(chǎn)生的原因、噪聲的干擾模式和噪聲的波形性質(zhì)的不同劃分。其中：按噪聲產(chǎn)生的原因不同，分為放電噪聲、浪涌噪聲、高頻振蕩噪聲等；按噪聲的波形、性質(zhì)不同，分為持續(xù)噪聲、偶發(fā)噪聲等；按聲音干擾模式不同，分為共模干擾和差模干擾。共模干擾和差模干擾是一種比較常用的分類方法。共模干擾是信號(hào)對(duì)地面的電位差，主要由電網(wǎng)串入、地電位差及空間電磁輻射在信號(hào)線上感應(yīng)的共態(tài)（同方向）電壓送加所形成。共模電壓有時(shí)較大，特別是采用隔離性能差的電器供電室，變送器輸出信號(hào)的共模電壓普遍較高，有的可高達(dá)130V以上。共模電壓通過不對(duì)稱電路可轉(zhuǎn)換成差模電壓，直接影響測(cè)控信號(hào)，造成元器件損壞（這就是一些系統(tǒng)I/O模件損壞率較高的原因），這種共模干擾可為直流、亦可為交流。差模干擾是指用于信號(hào)兩極間得干擾電壓，主要由空間電磁場(chǎng)在信號(hào)間耦合感應(yīng)及由不平衡電路轉(zhuǎn)換共模干擾所形成的電壓，這種讓直接疊加在信號(hào)上，直接影響測(cè)量與控制精度。
主營(yíng)產(chǎn)品:PLC模塊,DCS備品備件,機(jī)器人備件,伺服器,觸摸屏,輸入輸出模塊,變頻器,電機(jī)···
主營(yíng)品牌:ABB,AB,施耐德,Motoman,安川,Foxboro,Fanuc,ABB,GE,西屋,霍尼韋爾···
詢價(jià)→報(bào)價(jià)→合同→訂貨→發(fā)貨→售后,我們本著信譽(yù)、客戶至上、品牌服務(wù)、規(guī)范管理的經(jīng)營(yíng)理念竭誠(chéng)為您服務(wù)
三大承諾:
1、保證全新原裝進(jìn)口
2、保證安全準(zhǔn)時(shí)發(fā)貨
3、保證售后服務(wù)質(zhì)量
訂購(gòu)流程:
1、客戶確認(rèn)所需采購(gòu)產(chǎn)品型號(hào)
2、我方會(huì)根據(jù)詢價(jià)單型號(hào)查詢價(jià)格以及交貨期,擬一份詳細(xì)正規(guī)報(bào)價(jià)單
3,客戶收到報(bào)價(jià)單并確認(rèn)型號(hào)無誤后訂購(gòu)產(chǎn)品
4、報(bào)價(jià)單負(fù)責(zé)人根據(jù)客戶提供型號(hào)以及數(shù)量擬份銷售合同
5、客戶收到合同查閱同意后蓋章回傳并按照合同銷售金額匯款到公司開戶行
6、我公司財(cái)務(wù)查到款后,業(yè)務(wù)員安排發(fā)貨并通知客戶跟蹤運(yùn)單
歡迎您的來電,我們竭誠(chéng)為您服務(wù)!
278 10 shipping
Watch
From Turkey
Item image
DET-TRONICS HYDROGEN SULFIDE 13SEP214961 IG C7064E5012
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Siemens 6es7400-1ta01-0aa0 6es7 400-1ta01-0aa0 Ur1 Rack 18 Slot
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Stromberg SYKP 466 SPUJ 1 D5 C3 Transducer
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Wavetek Model 785 Breakout Box Four State Self Powered RS232 100 Led/Tester
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Schneider Automation SA TSXP57102 PROCESSOR
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
ADAM-6066 Power Relay Module
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
STAHL 9170/10-14-11 Switching Repeater
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
GE FANUC IC693MDL930J
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
PEP MODULAR COMPUTERS CAMERON CONTROLS CC-PN619095 14-46-01
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Kongsberg SIMRAD VT6010DRDT 4 Channel Video Transmitter + Data Transceiver
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Direct D3-10BDC 10 Slot Rack Chassis
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Allen-Bradley SLC 500 5/03 CPU 1747-l532 1747-L532 Ser D Rev 4 Processor
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
ALSTOM CEGELEC CONTROL PCB 20X4478 C CIRCUIT BOARD
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Zener Barrier Data logger cpu board AB-B-001-988-PCD
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
honeywell zellweger sensepo?nt ht combust?ble gas sensor
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
CP-132I PCBCP132IS VER:1 2
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Industrie-Messtechnik GMBH Druckmessumber BR 3378 081 001 030
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Dell Power Supply N275P-00 for GX520 SFF
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
ABB HMI030 1SDA063143R1 HMI030
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
MITSUBISHI MELSEC FX-48ER-ES fx-48er-es PROGRAMMABLE CONTROLLER
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Camille Bauer SINEAX PQ502 Transmitter Converter 502-35E2 C300 920E B0
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
GMC SINEAX F534 transmitter for frequency
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Converter ICF-1150I-M-ST-T Moxa Serial Converter
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Chromalox 3101-11000 Safety Limit Controller
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
8IME Tema FP TM8P0H110 Programmable Isolated Transducer
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
GE FANUC IC693MDL740E Output Module
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
SHIMPO FGE-100X FGE Digital Force Gauge 100 lb / 50 kg / 500 N
Pre-Owned
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
Allied Telesis CentreCOM Micro Repeater AT-MR125 new but no factory box
Brand New
1 390 52
+ 278 10 shipping
Watch
From Turkey
Item image
SEL RTD Module SEL-2600A 2600A01X 120v / 240v
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
GE FANUC IC693MDL730F OUTPUT MODULE IC693MDL730F
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
AKUSTA LTD 821800 MAIN BOARD (A2)
Pre-Owned
1 042 89
+ 590 97 shipping
Watch
From Turkey
Item image
Phoenix Contact PSM-EG-RS232/RS422-P/4K Interface Converter
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
ABB DI/DO 86-32CHF
1 355 76
+ 278 10 shipping
Watch
From Turkey
Item image
Koyo Direct Logic 305 D3-05B-1 5-Slot Local or Expansion Base with Power Supply
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
ABB Bailey INFI 90 6637830g1 Bus Monitor Module
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
SCHNEIDER ELECTRIC TSX PREMIUM TSXPSY2600
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
Allen Bradley Remote I/O Adapter Module 1771-ASB Ser E P/N 96218071 B01
Pre-Owned
1 286 23
+ 347 63 shipping
Watch
From Turkey
Item image
KONTRON PEP 619095 14-11-01 31 112-1220 1 PC BOARD
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
MOXA IMC-101-M-SC-T
1 355 76
+ 278 10 shipping
Watch
From Turkey
Item image
Siemens Simatic S7 SM 323 6ES7 323-1BH00-0AA0
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
ABB Bailey NTPL01 INFI ntpl01 90 Net 90 Plant Communication Loop Termination Uni
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
Abb NTDI02 ntd?02 Infi 90 Digital Interface Termination Unit
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
Siemens 6ES7-322-1BL00-0AA0 Digital Output Module
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
Siemens Simovert 6SE70900XX840FJ0 Driver Board 6SE7090-0XX84-0FJ0
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
Crompton Instruments Protector Delay 256-PATW
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
GE FANUC GENIUS BLOCK IC660EBD021T W/ TERMINAL IC660TBD023K IC660BBD023 24VDC
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
Industrial Scientific M40 gas Monitor
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
Siemens 505-4232a Digital Input Module 5054232A 505 4232a
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
Hirschmann RS2-4TX/1FX-ST EEC Rail Switch RS24TX/1FXST
Pre-Owned
1 390 52
+ 243 34 shipping
Watch
From Turkey
Item image
Fisher Rosemount Systems KJ3002x1-BB1 kj3002x1-bb1 analog output module
Pre-Owned
1 390 52
+ 208 58 shipping
Watch
From Turkey
Item image
Basler Electric Icrm-15 Inrush Current Reduction Module ICRM15
Pre-Owned
1 390 52
+ 208 58 shipping
Watch
From Turkey
Item image
Honeywell HC900 controller 900B01-0101 900B010101 900b01-0101 analog out
Pre-Owned
1 390 52
+ 208 58 shipping
Watch
From Turkey
Item image
Lot of 5 pieces WAGO 24VDC 4-CHANNEL DIGITAL INPUT MODULE 750-402
Pre-Owned
1 251 47
+ 347 63 shipping
Watch
From Turkey
Item image
Siemens 6ES7 331-7KF01-0AB0
Pre-Owned
1 320 99
+ 278 10 shipping
Watch
From Turkey
Item image
Peak 530f SBC Single Board Computer KJ023300
Pre-Owned
1 251 47
+ 347 63 shipping
Watch
From Turkey
Item image
1747-L532 SER C 1M SLC 500 PROCESSOR UNIT 1747-OS301 SER A with Memory Card
Pre-Owned
1 599 10
Free Shipping
Watch
From Turkey
Item image
Lotf of 5 pieces WAGO 753-440 4 CHANNEL DIGITAL INPUT MODULE
Pre-Owned
1 251 47
+ 347 63 shipping
Watch
From Turkey
Item image
Siemens 6es7 212-1bb23-0xb0 6ES7 212-1BB23-0XB0 CPU 222 Simatic S7-200
Pre-Owned
1 320 99
+ 278 10 shipping
Watch
From Turkey
Item image
Weed Fiber-optics 6e10 Series EOTEC Optical Interface Module PLC 7880-6538-498
Pre-Owned
1 320 99
