A06B-0236-B500

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描述

A06B-0236-B500

?抗干擾設(shè)計
為了保證系統(tǒng)在工業(yè)電磁環(huán)境中免受或減少內(nèi)外電磁干擾,必須從設(shè)計階段開始便采取三個方面抑制措施:抑制干擾源、切斷或衰減電磁干擾的傳播途徑、提高裝置和系統(tǒng)的抗干擾能力。這三點就是抑制電磁干擾的基本原則。PLC控制系統(tǒng)的抗干擾是一個系統(tǒng)工程,要求制造單位設(shè)計生產(chǎn)出具有較強抗干擾能力的產(chǎn)品,且有賴于使用部門在工程設(shè)計、安裝施工和運行維護中予以全面考慮,并結(jié)合具體情況進行綜合設(shè)計,才能保證系統(tǒng)的電磁兼容性和運行可靠性。進行具體工程的抗干擾設(shè)計時,應(yīng)主要注意以下兩個方面。
設(shè)備選型。
在選擇設(shè)備時,首先要選擇有較高抗干擾能力的產(chǎn)品,其包括了電磁兼容性,尤其是抗外部干擾能力,如采用浮地技術(shù)、隔離性能好的PLC系統(tǒng);其次還應(yīng)了解生產(chǎn)廠家給出的抗干擾指標(biāo),如共模抑制比、差模抑制比、耐壓能力、允許在多大電場強度和多高頻率的磁場強度環(huán)境中工作等;另外是靠考查其在類似工作中的應(yīng)用實績。
在選擇國外進口產(chǎn)品要注意,我國是采用220V高內(nèi)阻電網(wǎng)制式,而歐美地區(qū)是110V低內(nèi)阻電網(wǎng)。由于我國電網(wǎng)內(nèi)阻大,零點電位漂移大,地電位變化大,工業(yè)企業(yè)現(xiàn)場的電磁干擾至少要比歐美地區(qū)高4倍以上,對系統(tǒng)抗干擾性能要求更高。在國外能正常工作的PLC產(chǎn)品在國內(nèi)工業(yè)就不一定能可靠運行,這就要在采用國外產(chǎn)品時,按我國的標(biāo)準(zhǔn)(GB/T13926)合理選擇。
綜合抗干擾設(shè)計。主要考慮來自系統(tǒng)外部的幾種抑制措施,內(nèi)容包括:對PLC系統(tǒng)及外引線進行屏蔽以防空間輻射電磁干擾;對外引線進行隔離、濾波,特別是動力電纜應(yīng)分層布置,以防通過外引線引入傳導(dǎo)電磁干擾;正確設(shè)計接地點和接地裝置,完善接地系統(tǒng)。另外還必須利用軟件手段,進一步提高系統(tǒng)的安全可靠性。
主要抗干擾措施
采用性能優(yōu)良的電源,抑制電網(wǎng)引入的干擾。
在PLC控制系統(tǒng)中,電源占有極重要的地位。電網(wǎng)干擾串入PLC控制系統(tǒng)主要通過PLC系統(tǒng)的供電電源(如CPU電源、I/O電源等)、變送器供電電源和與PLC系統(tǒng)具有直接電氣連接的儀表供電電源等耦合進入的?,F(xiàn)在對于PLC系統(tǒng)供電的電源,一般都采用隔離性能較好的電源,而對于變送器供電電源以及和PLC系統(tǒng)有直接電氣連接的儀表供電電源,并沒受到足夠的重視。雖然采取了一定的隔離措施,但普遍還不夠,主要是使用的隔離變壓器分布參數(shù)大,抑制干擾能力差,經(jīng)電源耦合而串入共模干擾、差模干擾。所以對于變送器和共用信號儀表供電應(yīng)選擇分布電容小、抑制帶大(如采用多次隔離和屏蔽及漏感技術(shù))的配電器,以減少PLC系統(tǒng)的干擾。
此外,為保證電網(wǎng)饋電不中斷,可采用在線式不間斷供電電源(UPS)供電,提高供電的安全可靠性。而且UPS還具有較強的干擾隔離性能,是一種PLC控制系統(tǒng)的理想電源。

產(chǎn)品承諾:
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保?證?安全準(zhǔn)時發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢價格,大量現(xiàn)貨。

主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA
? 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家

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2801-YFX A Machine Vision Camera Body AB Recon.

5S1F Transformer Pr:480/240 Sec:240/120 5KVA Square D

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ABB Robotics Elmo Servo Motor PS130/6-50-P Sweden

CH Cutler Hammer KD Support Block 1482D11G04 3pole New

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96MPR03M Furnas 96M CPU Module Ser A NOS

3134-72 Russellstoll Receptacle 100A 480VAC 250VAC/DC

Scientific Columbus XL3-1K5-A2 CL31K5A2 transducer NEW

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96MRK04 Furnas 96M Modular 4 slot rack ( 45C-911 ) NOS

ABB Robotics Flexible Resistor w/fan 3HAB2844-1/2 New

Mitsubishi Melsec programmable controller AI61 NOS New

ASCO EV8316G382V 3way Air Piloted Spring Return Valve

GE EPM5300P Multifunction Power Monitor PL53002A0B* New

Honeywell ST3000 Pressure Transmitter STG941 NOS New

140R-302 Current Transformer 3000:5 Square D 600V NOS

6ES7153-2AA02-0?XB0 Siemens Simatic S7 Module 24VDC

Ground Fault Monitor Superintend VRE-80US NOS

Micron Transformer G003K1HF1A03 208 120/240V 3KVA New

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Sy/Max 8030 CRM21 Interface Module 30608-504-50

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RS232PONI Cutler Hammer RS232 RPONI W970630 5299C57G02

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Allen Bradley 1791-16B0 179116B0 B I/O Module NOS New

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Mitsubishi Melsec Relay Unit Module F2-60ER

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Keyence AS-440-01 120V 240V sensor amplifier

Omron ASCII Basic Module Unit C500-ASCO4 for CPU

B/W Ametek Controls 5200-LF1 Control Relay 52-110100

Reliance Rectifier Stack 0-51421-1 NOS

Reliance thyristor semiconductor heatsink 7817-1Y

Texas Instruments Model 510 Hand Programmer 2458740-1

AB Allen Bradley 1770-P1 power Supply +/_ 15DC New

E-T-A Flow Switch Monitor FS10-U1 10A max 24Vdc 2@Lot

Bedia Liquid Level Sensor Switch PLS-40 DC9-36V New 3@

Moore IPT Current Pressure Transmitter

Siemens A1103100532 Circuit Board Thyristor Tripler NOS

II-VI Laser Lens 1″ , 3 1/4″ Brass Casing New NOS

8908A001 Asco Electronic Module 24VDC Joucomatic NOS

3134-72 Russellstoll Receptacle 100A 480VAC 250VAC/DC

Newport Digital Panel Meter Q2001-OOR1 Quanta 115V NOS

APJ-6585 Plug 4W5P Crouse Hinds 60A 250DC/600AC

Omron A/D Module C200H-AD001 1-5V 4-20mA/0-10V AD001

Hubbell Killark SHC1058 / ZS514 Cord Connector Lot 10@

AdTech SCT00 Voltage Current Transmitter SCT00/I14/P6

Crompton Instruments 256-XWMU-QQHG-C?3-DG

Siemens Pump Overload Relay 958CA32AX625 33-66 MHA New

WeldSaver Proteus Control Monitor 9WS2WRAE-DOR Refurb

Interbus-S Phoenix Contact IBS IP CBK 1/24-F-V3

Black Box Expansion Serial Port PI221A + PI225A Unit

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836-NX228072 Ser A Allen Bradley Pressure Switch NOS

NSD VM-2A-32 VM-2 MRE-32SP062 Absocoder Controller New

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Current Rating Module 1D89108G29 HTM-29 B Westinghouse

Siemens Simatic 6ES5946-3UA21 Module Circuit Board

Allen Bradley Hand Held Scanner 2755-G3 w/ cable

Milltronics Airanger SPL Ultrasonic Level Monitor (011)

Thalheim Tachoduktor Tachometer STD41FA4k 011215-51 NOS

Pepperl+Fuchs KHD2-IVI-AB1 92478 Bus Coupler Mod. Used

Texas Instrument Siemens ASCII Basic 305-01AB Module

Phoenix Contact Systemtrab Valvetrab Circuit Breakers +

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4264BC Receptacle Russellstoll 30/60A 250/480VAC

Cutler-Hammer Circuit Breaker E125E EGE3050FFG New

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Plug AR647-M72 Crouse Hinds 60amp 4W4P Arktite

800H-2HG7 Jog Stop Industrial Switch 600V max Haz Duty

Russellstoll Receptacle JRSA1034H +mt. box 250/600VAC

IC693ALG221B GE Fanuc Input Analog 4pt Current Module

System Electric Condensomatic CR2000-8-AT

BLACK BOX LWU200GB-E-US LASER LINK 200GB 155293

EMERSON R313 60 HP ELECTRIC MOTOR 1190 RPM 31026

N. BASE COMMUNICATIONS NH228-IPS IP SWITCH 153044

3M FT520#R2 HOT MELT TOOL KIT 155204

ELKAY ENOBM28C SWIRLFLO SENSOR OPERATED DRINK FOUNTAIN

ICP BHC120M1A 10 TON HP MULTI POSITION FAN COIL 165796

NEW BRUNSWICK C-10* CLASSIC SHAKER 158021

YORK BP060C00N4ABA1 5T 10 SEER ROOFTOP AIR CONDITIONER

US/EMERSON C75P3B 75 HP MOTOR INVERTER TEFC 69706

ELKAY LRPBM28K 2 LEVEL REFRIGERATED WATER FOUNTAIN BODY

COPELAND 2DD3R63KE-TFD-8?00 5T AC/HP COMPRESSOR 166128

WEG 03018ET3ECT286T COOLING TOWER 30HP MOTOR 162438

DAY AND NIGHT PHF342000L00A1 3.5T ROOFTOP AIR CONDITIO

DAYTON ACP060C1342A 5TON ROOFTOP AIR CONDITIONER 151680

CARRIER 19C871479 IMPELLER 5″ IN DIAMETER SHAFT SIZE

CARRIER 19C661469 IMPELLER 3″ DIAMETER 151065

GOULDS PUMPS 0C02214A26-2149 SHAFT ASSY W/GEAR 99056

CARRIER 17M317344 GUIDE VANE ASSEMBLY 150376

OTC 5019 LOW LIFT TRANSMISSION JACK 162354

DAYTON 20 HP MOTOR 208-230/460 VOLT 3540 RPM 159300

DAYTON 20 HP MOTOR 208-230/460 VOLT 1750 RPM 159303

TRANE YSC036E4ELA0L 3 TON ROOFTOP AIR CONDITIONER

MTI QSODI6042-BT OVAL BATH TUB SOAKER ONLY/BISCUIT

BLACK BOX LWU0500-TP-PLUS?-US LASER TWISTED PAIR 156987

CARRIER 17M4241184 SEAL HOUSING 150340

DAYTON 12,000 BTUH PORTABLE AIR CONDITIONER 159684

COPELAND 6RH1-200A-TSK-8?00 20T SEMI HERMETIC 58411

DAYTON 54″ CABINET EXHAUST FAN/RPM 518 156895

DAYTON URT8618 480 VOLT 50KW UNIT HEATER 170,500 BTU

DAYTON URT8618 480 Volt 50KW UNIT HEATER 170,500 BTU

JACUZZI EH85969 72″FIBERGLASS WHIRLPOOL CENTER DRAIN

BERK-TEK 10033023 8162’SPOOLED FIBER OPTIC CABLE 140158

DAY AND NIGHT PHX336000L00A1 3T ROOFTOP AIR CONDITIONER

DAY AND NIGHT PHX336000L00A1 3T ROOFTOP AIR CONDITIONER

PORT-A-COOL PAC2K482S EVAPORATIVE FAN 1 HP 146406

JAMESBURY 815W3600TT/GO 10″ BUTTERFLY VALVE 58228

ELKAY ECH81J 115 VOLT REMOTE WATER CHILLER 160849

THERMO SCI 335900AP000 GEN 10 VIS W/OUTPUT PRINTER

BLACK BOX AC1051A CAT5 VIDEO MATRIX SWITCH 159872

SUMITOMO ELECTRIC SE-3NK096A 2862′ 96-STRAND CABLE

CIECOR OPTICAL 060X81-T-31XX24 FIBER OPTIC CABLE 154395

RHEEM RKNA-A060DL10E 5 TON ROOFTOP AIR CONDITIONER

SQUARE D H365R FUSIBLE SAFETY SWITCH 161058

REZNOR RP400-8 400,000 BTU ROOFTOP DUCT FURNACE 166310

REZNOR RP400-8 400,000 btu ROOFTOP DUCT FURNACE 166310

DAYTON POWER VENTED UNIT HEATER W/ BELT DRIVEN BLOWER

DAY AND NIGHT PGF342080L00A 3.5T ROOFTOP AIR CONDITION

RUBBERMAID 1046 2-1/2 CUBIC YARD TILT TRUCK 161139

3COM 3C17204-US SUPERSTACK 3 4400 157202

RHEEM RJNL-A048CL000 4 Ton ROOFTOP AIR CONDITIONER

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CARRIER 19C761479 IMPELLER 5″ DIAMETER 151063

專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊

PLC模塊,可編程控制器,CPU模塊,IO模塊,AI模塊,通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅

15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家


選擇深圳長欣,選擇放心,售后無憂大量現(xiàn)貨,當(dāng)天順豐發(fā)貨!
主營:本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點經(jīng)驗。
1、先通讀一遍“系統(tǒng)手冊”(不管能不能看懂,先了解個大概,以便學(xué)習(xí)編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數(shù)等條件,把或、與、非關(guān)系理順;
3、進而練習(xí)整數(shù)運算、實數(shù)運算、類型轉(zhuǎn)換;
4、量程轉(zhuǎn)換、PID調(diào)節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個物理回路驗證,比如變頻器+電機+測速傳感器);
5、循環(huán)、順序、跳轉(zhuǎn)等程序控制(盡量避免跳轉(zhuǎn),非跳不可時也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學(xué)會一種至于其它的學(xué)習(xí)起來也就簡單了。