產(chǎn)品詳情
主要通過(guò)電源和信號(hào)線引入,通常稱為傳導(dǎo)干擾。這種干擾在發(fā)電現(xiàn)場(chǎng)較嚴(yán)重。因?yàn)榘l(fā)電廠是強(qiáng)電場(chǎng)和強(qiáng)電磁場(chǎng)密集地方。
來(lái)自電源的干擾
實(shí)踐證明,因電源引入的干擾造成控制系統(tǒng)故障的情況很多,由于控制系統(tǒng)的供電大都來(lái)自電廠的供電網(wǎng)絡(luò),其覆蓋全廠,電網(wǎng)內(nèi)部的變化,如開(kāi)關(guān)操作浪涌、大型電力設(shè)備起停、交直流傳動(dòng)裝置引起的諧波、電網(wǎng)短路暫態(tài)沖擊等,都通過(guò)配電線路傳到電源。控制電源通常采用隔離電源,但其機(jī)構(gòu)及制造工藝因素使其隔離性并不理想。實(shí)際上,由于分布參數(shù)特別是分布電容的存在,絕對(duì)隔離是不可能的。
來(lái)自信號(hào)線引入的干擾
與控制系統(tǒng)連接的各類信號(hào)(信號(hào)線和控制指令線)傳輸線,除了傳輸有效的各類信息之外,總會(huì)有外部干擾信號(hào)侵入。此干擾主要有兩種途徑:一是通過(guò)變送器供電電源或共用信號(hào)儀表的供電源串入的電網(wǎng)干擾,這往往被忽視;二是信號(hào)線受空間電磁輻射感應(yīng)的干擾,即信號(hào)線上的外部感應(yīng)干擾,這是很?chē)?yán)重的。由信號(hào)引入干擾會(huì)引起 I/O 信號(hào)工作異常和測(cè)量精度大大降低,嚴(yán)重 時(shí)將引起元器件損傷。對(duì)于隔離性能差的系統(tǒng),還將導(dǎo)致信號(hào)間互相干擾,引起共地系統(tǒng)總線回流,造成邏輯數(shù)據(jù)變化、誤動(dòng)和死機(jī)。控制系統(tǒng)因信號(hào)引入干擾造成 I/O 模件損壞數(shù)相當(dāng)嚴(yán)重,由此引起系統(tǒng)故障的情況也很多。所以檢測(cè)端信號(hào)加隔離非常重要(例:北京平和PH系列隔離器產(chǎn)品),既可以保證信號(hào)傳輸精度,還可以保護(hù)系統(tǒng)I/O模件不被損壞。
來(lái)自接地系統(tǒng)混亂時(shí)的干擾
接地是提高電子設(shè)備電磁兼容性(EMC)的有效手段之一。正確的接地,既能抑制電磁干擾的影響,又能抑制設(shè)備向外發(fā)出干擾;而錯(cuò)誤的接地,反而會(huì)引入嚴(yán)重的干擾信號(hào),使系統(tǒng)將無(wú)法正常工作。
控制系統(tǒng)的地線包括系統(tǒng)地、屏蔽地、交流地和保護(hù)地等。接地系統(tǒng)混亂對(duì) PLC 系統(tǒng)的干擾主要是各個(gè)接地點(diǎn)電位分布不均,不同接地點(diǎn)間存在地電位差,引起地環(huán)路電流,影響系統(tǒng)正常工作。
例如電纜屏蔽層必須一點(diǎn)接地,如果電纜屏蔽層兩端A、B都接地,就存在地電位差,有電流流過(guò)屏蔽層,當(dāng)發(fā)生異常狀態(tài)如雷擊時(shí),地線電流將更大。
此外,屏蔽層、接地線和大地有可能構(gòu)成閉合環(huán)路,在變化磁場(chǎng)的作用下,屏蔽層內(nèi)有會(huì)出現(xiàn)感應(yīng)電流,通過(guò)屏蔽層與芯線之間的耦合,干擾信號(hào)回路。若系統(tǒng)地與其它接地處理混亂,所產(chǎn)生的地環(huán)流就可能在地線上產(chǎn)生不等電位分布,影響邏輯電路和模擬電路的正常工作。邏輯電壓干擾容限較低,邏輯地電位的分布干擾容易影響邏輯運(yùn)算和數(shù)據(jù)存貯,造成數(shù)據(jù)混亂、程序跑飛或死機(jī)。模擬地電位的分布將導(dǎo)致測(cè)量精度下降,引起對(duì)信號(hào)測(cè)控的嚴(yán)重失真和誤動(dòng)作。(例北京平和隔離器也可有效解決信號(hào)共地問(wèn)題)
2.3 來(lái)自系統(tǒng)內(nèi)部的干擾
主要由系統(tǒng)內(nèi)部元器件及電路間的相互電磁輻射產(chǎn)生,如邏輯電路相互輻射及其對(duì)模擬電路的影響,模擬地與邏輯地的相互影響及元器件間的相互不匹配使用等。這都屬于制造廠對(duì)系統(tǒng)內(nèi)部進(jìn)行電磁兼容設(shè)計(jì)的內(nèi)容,比較復(fù)雜,作為應(yīng)用部門(mén)是無(wú)法改變,可不必過(guò)多考慮,但要選擇具有較多應(yīng)用實(shí)績(jī)或經(jīng)過(guò)考驗(yàn)的系統(tǒng) 。
咨詢熱線:18150695049
誠(chéng)信經(jīng)營(yíng),質(zhì)量為首,誠(chéng)信至上,鼎晟達(dá)竭誠(chéng)為您服務(wù)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
漳州鼎晟達(dá)自動(dòng)化設(shè)備有限公司
聯(lián)系人 藍(lán)經(jīng)理
手機(jī) :18150695049
QQ :2880842794
郵箱 :2880842794@qq.com
傳真 :0596-3119658(請(qǐng)備注林工收)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*所有備件的質(zhì)保期均為1年,經(jīng)過(guò)專業(yè)測(cè)試認(rèn)證。
*如果您需要訂購(gòu)產(chǎn)品超過(guò)1件,請(qǐng)與我們聯(lián)系,我們可以為您提供折扣。
*我們僅采用快遞方式遞送備件。(順豐)
*如果您發(fā)現(xiàn)其他供貨商為相同產(chǎn)品提供更為低廉的價(jià)格,我們也愿意參照其價(jià)格向您提供進(jìn)一步的折扣。如果還有其他任何問(wèn)題,請(qǐng)隨時(shí)與我們聯(lián)系。
*請(qǐng)讓我們知道您有任何,備品,備件,的需要,我們可以給您進(jìn)一步的援助,我們等候您的詢盤(pán)。
【主營(yíng)產(chǎn)品】
1:Invensys Foxboro(??怂共_):I/A Series系統(tǒng),F(xiàn)BM(現(xiàn)場(chǎng)輸入/輸出模塊)順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號(hào)處理、數(shù)據(jù)通信及處理等。
2:Invensys Triconex: 冗余容錯(cuò)控制系統(tǒng)、基于三重模件冗余(TMR)結(jié)構(gòu)的最現(xiàn)代化的容錯(cuò)控制器。
3:Westinghouse(西屋): OVATION系統(tǒng)、WDPF系統(tǒng)、WEStation系統(tǒng)備件。
4:Rockwell Allen-Bradley: Reliance瑞恩、SLC500/1747/1746、MicroLogix/1761/1763/1762/1766/1764、CompactLogix/1769/1768、Logix5000/1756/1789/1794/1760/1788、PLC-5/1771/1785等。
5:Schneider Modicon(施耐德莫迪康):Quantum 140系列處理器、控制卡、電源模塊等。
6:ABB:工業(yè)機(jī)器人備件DSQC系列、Bailey INFI 90等。
7:Siemens(西門(mén)子):Siemens MOORE, Siemens Simatic C1,Siemens數(shù)控系統(tǒng)等。
8:Motorola(摩托羅拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
9:XYCOM:I/O 、VME板和處理器等。
10:GE FANUC(GE發(fā)那科):模塊、卡件、驅(qū)動(dòng)器等各類備件。
11:Yaskawa(安川):伺服控制器、伺服馬達(dá)、伺服驅(qū)動(dòng)器。
12:Bosch Rexroth(博世力士樂(lè)):Indramat,I/O模塊,PLC控制器,驅(qū)動(dòng)模塊等。
13:Woodward(伍德沃德):SPC閥位控制器、PEAK150數(shù)字控制器。
14:工業(yè)機(jī)器人系統(tǒng)備件。
RELIANCE 57408-B
Reliance 57403
RELIANCE ELECTRIC RFV-250
RELIANCE ELECTRIC 3141-N
RELIANCE ELECTRIC 55307-1
RELIANCE ELECTRIC 705385-62R
RELIANCE ELECTRIC 76500-V
Reliance Electric 0-55325-46
RELIANCE ELECTRIC 45C1A
Reliance Electric 0-57408-1C
RELIANCE ELECTRIC ECSR-450 USPP ECSR450
RELIANCE ELECTRIC 701819-X USPP 701819X
RELIANCE ELECTRIC DRIVE ASSEMBLY 294551R
RELIANCE 0-51377-41
REFURBISHED RELIANCE 603515-5A
REFURBISHED RELIANCE 603515-5A
RELIANCE ELECTRIC K-266 NSPP K266
RELIANCE ELECTRIC 3CB2015 USPP 3CB2015
RELIANCE ELECTRIC 60-21-145 NSPP 6021145
RELIANCE ELECTRIC 2DF4283 MAINS FILTER GOOD TAKEOUT
RELIANCE ELECTRIC 0-51831-4 CVTE CARD
RELIANCE ELECTRIC CONTROL MODULES 51851-6
RELIANCE VSAC VOLTAGE SOURCE ANALOG INVERTER 0-52860-2
RELIANCE VSDC DIGITAL VOLTAGE SOURCE # 0-52859-2
RELIANCE ELECTRIC PC BOARD METER CALIBRATOR 0-48652
RELIANCE VLTG DETECT VLDD MODULE BOARD 0-51847-3
RELIANCE ELECTRIC 64670-11-RA USPP 6467011RA
RELIANCE ELECTRIC SK-26500-PA
RELIANCE ELECTRIC 61C350
RELIANCE ELECTRIC O-57402-C
RELIANCE ELECTRIC 0-51874
Reliance Electric Drive TSTB PC Board Card
RELIANCE ELECTRIC 45C-900 USPP 45C900
RELIANCE ELECTRIC 0-54393 USPP 054393
RELIANCE ELECTRIC S12-20010LU USPP S1220010LU
RELIANCE ELECTRIC 610296-2A USPP 6102962A
RELIANCE ELECTRIC 612232-3RB USPP 6122323RB
RELIANCE ELECTRIC 0-49022 USPP 049022
RELIANCE ELECTRIC 0-51383-2 USPP 0513832
RELIANCE ELECTRIC 0-51445 USPP 051445
RELIANCE ELECTRIC 0-51804-1 USPP 0518041
RELIANCE ELECTRIC 0-51881-1 USPP 0518811
RELIANCE ELECTRIC 0-52876-1 USPP 0528761
RELIANCE ELECTRIC 0-54200 USPP 054200
RELIANCE ELECTRIC 0-54400 USPP 054400
RELIANCE ELECTRIC 0-55300 USPP 055300
RELIANCE ELECTRIC 0-57050 USPP 057050
RELIANCE ELECTRIC 0-58706-3 USPP 0587063
RELIANCE ELECTRIC 0-59026 USPP 059026
RELIANCE ELECTRIC 0-864660-58S USPP 086466058S
RELIANCE ELECTRIC 1SU21003 USPP 1SU21003
RELIANCE ELECTRIC 401254-C NSFP 401254C
Reliance Field Supply DCS Power Module # 803456-21T
Reliance Field Supply DCS Power Module # 803456-21S
RELIANCE Power Supply Module # S-25052-3
RELIANCE ELECTRIC 57416-D
RELIANCE ELECTRIC 0-48664-2
RELIANCE ELECTRIC 846747-R USPP 846747R
Reliance Electric 0-55325-9
RELIANCE ELECTRIC 64676-1BG NSPP 646761BG
RELIANCE ELECTRIC 0-56921-401AA USPP 056921401AA
RELIANCE ELECTRIC 0-49060-2A USPP 0490602A
RELIANCE ELECTRIC 0-57050 USPP 057050
RELIANCE ELECTRIC PLASTIC REF POT ASSY 608870 - 91R
Reliance Electric 0-54355 Tach Control board
RELIANCE ELECTRIC 410403-78AW USPP 41040378AW
RELIANCE ELECTRIC CIRCUIT CARD 413338-1YD
RELIANCE ELECTRIC 0-57414-1 USPP 0574141
RELIANCE ELECTRIC 419904-4AY NSPP 4199044AY
RELIANCE ELECTRIC 1AC2102 USPP 1AC2102
RELIANCE ELECTRIC MODEL RECTIFIER STACK 8647510S 1000V
RELIANCE ELECTRIC 41510439AB NSFP 41510439AB
RELIANCE ELECTRIC 48135-AJ NSFP 48135AJ
Reliance 57C435
RELIANCE ELECTRIC 0-52874-1
RELIANCE VTAB V/T ANALOG PC BOARD MODEL 0-52874-1
RELIANCE DC6A GATE DRIVER PC BOARD MODEL 0-52861
Reliance Automax Processor Module 57C407
Reliance Electric 57C435A
RELIANCE ELECTRIC 3141-TY NSFP 3141TY
RELIANCE ELECTRIC 602-051-9A NSPP 6020519A
RELIANCE ELECTRIC RFC-125 NSFP RFC125
RELIANCE ELECTRIC RFS150 NSPP RFS150
RELIANCE ELECTRIC 701819-11AC NSFP 70181911AC
RELIANCE ELECTRIC 706364-1E USPP 7063641E
RELIANCE ELECTRIC ES237072 NSPP ES237072
RELIANCE ELECTRIC K-254 NSPP K254
RELIANCE ELECTRIC K-652 NSPP K652
RELIANCE ELECTRIC 0-51377-35 USPP 05137735
RELIANCE ELECTRIC 0-51486-7 NSPP 0514867
RELIANCE ELECTRIC 0-52711-10 USPP 05271110
RELIANCE ELECTRIC 402410-100BA NSFP 402410100BA
RELIANCE ELECTRIC 413330-1A NSPP 4133301A
RELIANCE ELECTRIC 6004341-7R NSFP 60043417R
RELIANCE ELECTRIC 57C-400 USPP 57C400
RELIANCE ELECTRIC 612439-R NSPP 612439R
RELIANCE ELECTRIC 27083-21R USPP 2708321R
Automate 45C60A Output module (C-H / Reliance)
RELIANCE ELECTRIC 49474-1A NSPP 494741A
RELIANCE ELECTRIC HLA-50-06Z-5 NSPP HLA5006Z5
RELIANCE ELECTRIC 600434-5R NSPP 6004345R
RELIANCE ELECTRIC R221A USPP R221A
RELIANCE ELECTRIC CRCG REGULATOR MODULE BOARD: 0-51851-6
RELIANCE ELECTRIC 809.5400 USPP 8095400
Reliance Electric 57406
RELIANCE ELECTRIC 57C402
RELIANCE ELECTRIC 846831-RL USPP 846831RL
RELIANCE ELECTRIC 78091-1R USPP 780911R
RELIANCE ELECTRIC 0-51434-6 USPP 0514346
RELIANCE ELECTRIC 415710-13A USPP 41571013A
RELIANCE ELECTRIC 802284-24A USPP 80228424A
RELIANCE ELECTRIC 1SU20002 USPP 1SU20002
RELIANCE ELECTRIC 0-51814-4 NSPP 0518144
RELIANCE ELECTRIC 0-56947-20 NSFP 05694720
RELIANCE ELECTRIC 0-54309 USPP 054309
RELIANCE ELECTRIC 61C-599 USPP 61C599
RELIANCE ELECTRIC RESOLVER INPUT MODULE 57411-2H
RELIANCE ELECTRIC 0-57420 USPP 057420
RELIANCE ELECTRIC 45C-67 NSFP 45C67
RELIANCE ELECTRIC 69000-37B NSFP 6900037B
Reliance Electric 604080-46A 60408046A
RELIANCE ELECTRIC 63803-13DV NSFP 6380313DV
RELIANCE ELECTRIC F52A0624 USPP F52A0624
RELIANCE ELECTRIC 0-590051 USPP 0590051
RELIANCE ELECTRIC 107092-7S USPP 1070927S
RELIANCE ELECTRIC 412723-31
Reliance Electric AutoMax 57C403
RELIANCE DCS5000
RELIANCE ELECTRIC 86031-0A NSPP 860310A
RELIANCE ELECTRIC 602455-23A NSPP 60245523A
Reliance 2GU42005 AC Drive
Reliance Electric Interface Module Isolated Analog 57C417A
RELIANCE 413330-12AQ TACHOMETER MOTOR B 41333012AQ
RELIANCE ELECTRIC 411881-80A NSFP 41188180A
RELIANCE ELECTRIC 610274-46R NSPP 61027446R
RELIANCE ELECTRIC AC DRIVE 2DB2005
RELIANCE ELECTRIC 602909-235AA NSFP 602909235AA
RELIANCE ELECTRIC 76627-BD USPP 76627BD
RELIANCE ELECTRIC 51865.15 (CLDS BOARD) NEW IN BOX
RELIANCE ELECTRIC 612401-76R USPP 61240176R
Reliance Electric 57403 High Output Module
Baldor Reliance Industrial Motor KL3403 34C63-5506
RELIANCE ELECTRIC 57C-435 NSPP 57C435
Reliance Power Supply Board PRSA Model: 0-51845 NIB
Reliance Electric 0-51865-9 Current Loop Module 0518659
RELIANCE ELECTRIC 5CC1-107072-005RY USPP 5CC1107072005RY
RELIANCE ELECTRIC 62-PMLF-0600-A-0-00
RELIANCE ELECTRIC 0-57636-C
RELIANCE ELECTRIC 0-57403-E USPP 057403E
RELIANCE ELECTRIC 0-57014 NSPP 057014
RELIANCE 57411-1
RELIANCE 57403-D
RELIANCE ELECTRIC 0-57403-J USPP 057403J
RELIANCE 603515-5A TACHOMETER GENERATOR
RELIANCE 603515-5A TACHOMETER GENERATOR 6035155A
RELIANCE ELECTRIC 0-54394-10 NSFP 05439410
RELIANCE ELECTRIC 0-51851-6 PRTD CIRCUIT PDMA
RELIANCE ELECTRIC 0-51385 USPP 051385
RELIANCE ELECTRIC 0-52852 USPP 052852
RELIANCE ELECTRIC 0-54121-7S USPP 0541217S
RELIANCE ELECTRIC S12-204P0LU USPP S12204P0LU
RELIANCE ELECTRIC P56X3
RELIANCE ELECTRIC 0-54394-3 USPP 0543943
RELIANCE ELECTRIC 45C-102 NSFP 45C102
RELIANCE ELECTRIC 0-49001-5 USPP 0490015
RELIANCE ELECTRIC 0-49013 USPP 049013
RELIANCE ELECTRIC 0-49017-14 USPP 04901714
RELIANCE ELECTRIC 0-51884
RELIANCE ELECTRIC 0-51893
RELIANCE ELECTRIC 0-51893-2
RELIANCE ELECTRIC 0-51899-2
RELIANCE ELECTRIC 0-52012-2

