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#圖片僅供參考#

1．*處理單元（CPU） 
CPU作為整個(gè)PLC的核心，起著總指揮的作用。CPU一般由控制電路、運(yùn)算器和寄存器組成。這些電路通常都被封裝在一個(gè)集成電路的芯片上。CPU通過(guò)地址總線、數(shù)據(jù)總線、控制總線與存儲(chǔ)單元、輸入輸出接口電路連接。CPU的功能有以下一些：從存儲(chǔ)器中讀取指令，執(zhí)行指令，取下一條指令，處理中斷。 
2．存儲(chǔ)器（RAM、ROM）
 存儲(chǔ)器主要用于存放系統(tǒng)程序、用戶(hù)程序及工作數(shù)據(jù)。存放系統(tǒng)軟件的存儲(chǔ)器稱(chēng)為系統(tǒng)程序存儲(chǔ)器;存放應(yīng)用軟件的存儲(chǔ)器稱(chēng)為用戶(hù)程序存儲(chǔ)器；存放工作數(shù)據(jù)的存儲(chǔ)器稱(chēng)為數(shù)據(jù)存儲(chǔ)器。常用的存儲(chǔ)器有RAM、EPROM和EEPROM。RAM是一種可進(jìn)行讀寫(xiě)操作的隨機(jī)存儲(chǔ)器存放用戶(hù)程序，生成用戶(hù)數(shù)據(jù)區(qū)，存放在RAM中的用戶(hù)程序可方便地修改。RAM存儲(chǔ)器是一種高密度、低功耗、價(jià)格便宜的半導(dǎo)體存儲(chǔ)器，可用鋰電池做備用電源。掉電時(shí)，可有效地保持存儲(chǔ)的信息。EPROM、EEPROM都是只讀存儲(chǔ)器。用這些類(lèi)型存儲(chǔ)器固化系統(tǒng)管理程序和應(yīng)用程序。
 3．輸入輸出單元（I/O單元） 
I/O單元實(shí)際上是PLC與被控對(duì)象間傳遞輸入輸出信號(hào)的接口部件。I/O單元有良好的電隔離和濾波作用。接到PLC輸入接口的輸入器件是各種開(kāi)關(guān)、按鈕、傳感器等。PLC的各輸出控制器件往往是電磁閥、接觸器、繼電器，而繼電器有交流和直流型，高電壓型和低電壓型，電壓型和電流型。  
4．電源  
PLC電源單元包括系統(tǒng)的電源及備用電池，電源單元的作用是把外部電源轉(zhuǎn)換成內(nèi)部工作電壓。PLC內(nèi)有一個(gè)穩(wěn)壓電源用于對(duì)PLC的CPU單元和I/O單元供電。 
5．編程器  
編程器是PLC的zui重要外圍設(shè)備。利用編程器將用戶(hù)程序送入PLC的存儲(chǔ)器，還可以用編程器檢查程序，修改程序，監(jiān)視PLC的工作狀態(tài)。除此以外，在個(gè)人計(jì)算機(jī)上添加適當(dāng)?shù)挠布涌诤蛙浖纯捎脗€(gè)人計(jì)算機(jī)對(duì)PLC編程。利用微機(jī)作為編程器，可以直接編制并顯示梯形圖。

Copeland Discus Refrigeration Compressor 3DB3-0750-TFD #56571

Copeland Discus Refrigeration Compressor 3DB3-075E-TFD-251 #56570

Connectors  / Clamps 2C, 1 1/2" Diameter, 5" Length #13162

NEW Harting Connector MTC12G #26761

Allen Bradley Station Connector 1770-SC #2967

Harting Connector H-BE-6-SS  #17486

Phoenix Contact Interbus IBS CT24IOGT-T #8667

Automation Direct Connector Module ZL-CM24 #18636

Allen Bradley 1492-H #24580

Harting Connector Insert #20558

Harting Connector H-BE-10-1970, #17484

Phoenix Contact Housing Holder  Hood #20235

Parker Quick Coupling H8-62 60 Series Connector #30462

Connector Housing Z410 #20463

NEW Harting Connector 0914003300200, HAN 3 MOD-STI-C #13193 

Hubbell Midget Twist Lock Receptacle HBL7593 #16555

ILME CYR16.3 Cable Passing Hood #13471

Phoenix Contact Housing Holder  #20236

Square D Seriplex Mini-T Connector 5 Pin #13619

NEW DDK Connector DM S3106A 14S 6S #24449

NEW Souriau Connector 85 06 / 3476L10-6P, 6 PIN #29325

Interbus Module, IBS CT2410GT-T, #11739

Honeywell Resistor 4-20ma  30754466-501 #13773

Infrared Heater 250 Watt, 277 Volt #43570

Aero Industrial Strain Relief AE141L24-31P-G #34451

Amphenol Advantage Line P27939, Housing #11152

Box of 12, Male Hose Connector, 2" OD #13160

Contact Electronics Housing H-B16T  #20241

Harting Connector #13457

Phoenix Contact Connector Hood #20466

Phoenix Contact Housing Holder  Hood #20232

NEW Cooper Crouse  Hinds CHDN-TAER-NG Connector #5373

NEW Amphenol Aerospace 97-3108B-28 #32534

Lumberg Devicenet Distribution Box  0931 DNC 302 #35282

New Parker Straight Thread Connector 10-1/4F50G-S 29465

NEW Box of 2 Thomas Betts Connector 32511  #10300

New Harting Connector Housing HAN 6B GS 13.5 #31477

PT Hose Clamp 20B, 2" #22445

NEW Harting Insert, 02 #20560

Phoenix Contact Housing Hood #20240

Phoenix Contact Connector Hood #20465

Crouse Hinds T-Connector #12630

New Box of 6 Hilti Metal T-Connector MQV-3/2D #29047

Canfield Connector 810-100-031, *NEW*  #17554

New Box of 17 Appleton BX Box  Connectors 7287V #30914

NEW Parker Straight Thread Connector 10-1/4 F50G-S #29466

Amphenol Advantage Line P27955 Housing #11146

Harting Connector 0914100313 #13192

New Omega Connector PT06F8 #40059

NEW Harting Hood   00 #20557

Phoenix Contact Housing Hood #20239

NEW Cam-Lok E2125-2 Female Connenctor  #13468

Amphenol Connector Rail Mount, 20-51039, #11705

New Square D SPXTMQ5 T Mini Connector 5 Pin #29210

Hubbell Twist-Lock 50 Amp, 2 1/8" Diameter #26651

New Appleton Malleable Iron Conduit C125-M #31320

NEW Wago Connector J-Box 773-168 Pushwire #20555

New Parker 1JC43-16-16 Fluid Connector  #29467

NEW Hubbell Connector Body HBL7464V, 15 Amp #23374

Harting Connector MTC8G #39067

Hubbell Connector 60A600VAC #61774

emecanique Interlock XCS-A713, 3 Amp, #21360

Picolight Optical Transceiver PL-XPL-VC-S23-12 #36885

NEW Box of 10 Legris Straight Connector 31755611 #16591

Hoffman Flange Coupling C-CS5FC *NEW #13467

New Parker Fluid Connector 1J743-20-20 Fitting  #28798

Parker Fittings 8R50L0-S, Box of 4 Tee Fitting #28796

Picolight Optical Transceiver PL-XPL-00-S23-23 #36882

NEW Parker Straight Thread Connector 10-1/4 F50G-S #29466

Picolight Optical Transceiver PL-XPL-00-S13-21 #36879

Phoenix Contact IBS-ST-24-SSC-T   REF# 10472

New Schurter Power Connector 4735-0000 #39451

New Parker In Line Swivel Joint PS Series #21649

NEW Amphenol Aerospace Connector 97-3106A-28 0850 #32492

Picolight Optical Transceiver PL-XPL-00-S23-23 #36881

New Box of 5 Parker Fluid Connector IFU43-12-12 #30456

New T&B Strain Relief 2"  Cord Connector 2285 #28167

Banner Power Block Maxi Beam RPBT #30598

New Amphenol Connector Plug ACC08E32-5R #40081

Box of 8 ETC Aluminum Male Hose Connector F2 2" OD, 10 5/8" Length  #13161

New Parker In Line Swivel Joint PS Series #21650

Square D TBX DSS1622 Base Unit #11104

Allen Bradley Contactor 100-C12D10 #42085

Allen Bradley Contactor   Series A   100-C09*10   #49771

Allen Bradley Motor Starter Contactor 709-DOD93 #29276

Allen Bradley Contactor Relay  Series A   700-CF220Z   #46868

Allen Bradley Contactor 100-A75N*3, 75 Amp, #8837 

Allen Bradley Contactor 500L-BOD92, 30 Amp #29515

Allen Bradley RL4RD022T Contactor #11886

Allen Bradley Contactor 100-C60*00 w/100-S Series B #44455

Allen Bradley Contactor 100-A12NZ*3 #38085

Allen Bradley Contactor   700-CF310Z*   #50733

Allen Bradley Contactor   Series B   #47098

Allen Bradley Contactor 100-A12ND3 Series B #30081

Allen Bradley Contactor 100-A24ND3, 24 Amp #11861

Allen Bradley Contactor 100-A09ND3, Ser A #11756

Allen Bradley Contactor 100-A09NZ*3, Series B, Coil 24 VDC #35913

Allen Bradley 100-A30N2*3 Contactor 30 Amp #26007

Allen Bradley Contactor 100-A24NA3, Series C #41799

Allen Bradley Contactor 45 AMP 500-COD930, #5859  

Allen Bradley Contactor Module 40410-855-03 #30513

Allen Bradley Contactor 500L-AOD93 #29562

Allen Bradley Contact Kit 702L-TOD93, Series K #33525

Allen Bradley Contactor 702-BOD92 Series K, #14541

Allen Bradley Contactor 100-A09ND3, 9 Amp, 3 Pole, Series B #41825

Allen Bradley Contactor 500F-BO*930, 27Amp,  #13695

Allen Bradley Contactor 500-COD930, Series A, Size 2 #42679

Allen Bradley Contactor 500F-BO*930, 27Amp,  #13666

Allen Bradley 500PM-BOD93 Contactor #29558

Allen Bradley Contactor 500F-DOD930 #42681

Allen Bradley AC Contactor 500L-DOD92 #55239

Allen Bradley DC Contactor 123166 #55443

Allen Bradley  Contactor Relay  Series B   500-A0D93   #50058

Allen Bradley Contactor  Series A   100-C09D*400   #46869

Allen Bradley AC Contactor 500FL-BOD93, Series B #25677

Allen Bradley 500L-AOD93 AC Contactor #12198

Allen Bradley Contactor 100-A60N*3, Series C #44070

Allen Bradley Contactor 500F-BOD930 Series B #32082

Allen Bradley AC Contactor 702L-B0D Series K #25684

Allen Bradley Support Contact F-20323 #3319

Allen Bradley 100-A12ND3 Contactor, 12 Amp #11800

Allen Bradley 500L-DOD93 Contactor #6565

Allen Bradley Contactor 500-DOD930, 90 Amp, #14580

New Allen Bradley AC Contactor 500L-AOD93 15/20A #29110

Allen Bradley Contactor 100-D300 #54044

Fuji Electric Contactor SC-4-0 #39500

Fuji Electric  4NC0H0 Contactor #11852  

Fuji Electric Contactor SC-4-0/G #39501

Fuji Electric Contactor SC-4-0/G #39502

Fuji Electric Magnetic Contactor SRCa3631-0(3a1b) #34770

Fuji Electric Contactor SC-0/G #39495

Fuji Electric Contactor 4NC0H011, #12280

Fuji Electric  4NC0AO Contactor #11895

Fuji Electric Magnetic Contactor SJ-0G #43401

Fuji Electric Contactor 2NC4H0 #37457

Fuji Electric Contactor 2NC3H0 #37380

Fuji Electric Contactor 2NC3H0 #37377

Mercury Switches Mercury Contactor 33520AT #22878

Durakool Mercury Relay Contactor 1M35A120AC #15505

MDI Mercury Contactor 43520A-18 #11808 

MDI Mercury Contactor    330N0-120AU   #47817

Mercury 33520A Contactor  #11805

MDI Mercury Contactor 335N0-120A, 35 Amp, 600 Volt #47440

Sprecher & Schuh Auxiliary Contact  CS3-P #29914

emecanique Auxiliary Contactor CA3 SK20BD NEW #17272

emecanique Contactor LP1K1210BD3  #19240

emecanique Contactor LP1K0901BD3, 20 Amp, 600 Volt #47774

New Furnas Contactor 45DG10AF #30169

General Electric CR7CA Contactor, 25 Amp, 3 Pole #14522

Stromberg Welding Contator WC 5 #31948

Omron Contactor J7L-22 #39521

General Electric Contactor CR353AD3BA1 #33536

emecanique Contactor LA1DN22 #31702

Westinghouse Contactor A201K0CA, Size 0 #30088

Meiden Contactor 24320-21560-71 #37726

Square D Contactor 8536-SBO2SA #33178

Prestolite Contactor HB407KF360BA #38498

Orsco Lubrication Control LCM-100M #8137

Sylvania Contactor   T77U011   #42973

Square D / emecanique Contactor LC1 D09 #24741

emecanique Contactor LC1D123 #13604

Square D Contactor    8536-C0-3  #46778

General Electric, GE Contactor  CR453AD3ABB #34695

General Electric CL45 Contactor #16830

Durakool Contactor Switch 3050A120AC #14130

Omron Contactor J7L-09 #39504

emecanique Contactor LC1D18, 32 Amp #38081

ASEA Brown Boveri   Contactor  EH6-31E   #43713

ASEA Brown Boveri  Contactor  EH6-31E   #43716

emecanique Contactor LC1F500 #53862

emecanique Contactor LC1 D1210, 3 Pole, #14329

emecanique LC1-D12, 25 Amp, #13705

Klockner Moeller Contactor DIL6M, 3 Phase, 200 Amp Open #31731

Yaskawa AC Magnetic Contactor HP-20GF1T/10 #36774

Moeller Contactor DIL00M-G-10, 3 PH #43695

Cutler Hammer Contactor Series B1 Nema Size 3 C10EN3 #52929

Cutler Hammer Starter 9586ED58G Size 1 #27066

Square D Contactor 8910-DPA12, Series A, 25 Amp #38089

Asea Contactor EH22C-22, A600, P600, 10 Amp #43717

ABB Contactor   BC25-40-00   #50613

ABB BBC Brown Boveri BC9-40-00-A, 16 Amp #26745

ABB Relay Contactor  KC31  #43694

General Electric Contactor CL00D310T, 3 Pole,  #17003

General Electric Contactor CR353FF38*1 #14584

emecanique Contactor LC1 D1201, 25 amp #44129

Sprecher & Schuh CA7-12-10 Contactor #19032

ABB Welding Isolation Contactor EHW 250 #16997

General Electric Auxiliary Contact  BCLL20 #31619

Danfoss Contactor CI 9, 9 Amp, CI9, #30085

Carlo Gavazzi RN1A48A30 Semi Conductor Contactor #18596

BBC Petercem Contactor BC15-40-00-A 25 Amp #26746

emecanique Contactor LC20129 A60 #22032

AEG Contactor SH04 22Z, Coil 24 VDC #18655

New Allen Bradley Auxiliary Contact 595-AA, Series B  #43940

emecanique Contactor LP1K12004BD 3 #19239

Joslyn Clark Contactor 7000-7140-11 #34750

General Electric CL25D310T Contactor  #11900

Allen Bradley Auxiliary Contact 195-FA11 #31317

emecanique Contactor LP2D1801 #31796

emecanique Contactor LC1D115, DS06062 #43707

Hitachi AC Magnetic Contactor H10B-R #60916

emecanique Contactor LCI-D123, #12611

Sprecher & Schuh Contactor, CA7-30D-00, #11803

General Electric Contactor CR253DB302AAA, 3 Pole #33546

Square D Auxiliary Contact Series B SX-6 Class 9999 #30507

emecanique Contactor LPI D2510  #18647

ABB Drive Contactor EFLG 315-2P #58977

ABB Contactor TA25 10 Amp, #13605

Cutler Hammer Contactor 9656ED62 Contactor #27094

Sylvania Contactor A77-288514A-3, 50Amp #23972

MDI Mercury Contactor 23020A #26646

NEW ABB Welding Isolation Contactor EHW 250, #15246

Pertron Circuit Board 1400382 Processor PCB #32204

Cutler Hammer Contactor 9656ED5G Contactor #27418

General Electric CR353AD2DA1 Contactor #15143

General Electric Contactor CR356AD3B*1 #36656

Idec Contactor YSIN-180F #34556

General Electric Contactor CR453AD3ABB #33487

Moeller Contactor DIL1AM, 3 Pole, 3 PH #43690

Asea Contactor EH6C-31E, NEMA A600, P600, 24 VDC Coil #43709

Cutler Hammer Power Unit Series A1 C10DX #52911

emecanqie LC1 D09 10 Contactor 20 Amp #27475

Toshiba Magnetic Contactor C-180E #58050

Cutler Hammer Starter 9586ED58G Size 1 #27065

Westinghouse Motor Control  A201K0BA #32899

General Electric Contactor 453AD3ABB #33496

General Electric Contactor CLOOD310T & BSLDZ #17045

General Electric Contactor MCOC310AT, #21532

General Electric Contactor CR305C0 #38960

Carlo Gavazzi Semi Conductor Contactor RN1A48A30 #18595

Joslyn Clark Contactor 7000-7140-11 #34663

Bussman Fuse NON 400, 250 Volt #31843

emecanique Contactor LC1 D09 BD #31699

Joslyn Clark Contactor 7000-7140-11 #34664

emecanique Contactor CAD50 BD #31617

ABB Drive Contactor EHDB360C 2P-*L #59315

emecanique Contactor 400 AMP LC1-F400 #7060

Prestolite Contactor HB409KC360EA #38502

emecanique Contactor    LC1 D2510   #44131

emecanique LC1D09REQ3826G15 Contactor #10196

Westinghouse Contactor A201K0BA, 18 Amp #29882

Westinhgouse LIfe LIne Contactor NR-330, Size 3, 3 Pole #34086

General Electric Contactor CR353AD3D*1 #33486

emecanique Contactor LC1D115006, with LA8DN11  #43692

New Westinghouse Contact Kit 626B187G13 #43325

emecanique Contactor LC1 D8011, 240 Volt #44072

emecanique Auxiliary Contact LA1DN13 #31792

Fuji Electric Contactor 2NC3H0 3 PHASE #37455

Square D Definite Purpose Contactor 8910DPA13V09, 3 Pole, Series C #39456

General Electric Contactor CR253DB302AAA, 1PH, 3 Pole #33545

ABB Contactor BE63, 3 pole, 37KW #6953

emecanique Contactor LC1 F150 #34322

Siemens Contactor 3TF5 022-OAK6 #64714

Cutler Hammer Contactor CE15ENS2, Series B1, 1 PH, 50/60 Hz #35722

Westinghouse Contactor A200M5CAC 120V #8016

Siemens CXL40*3E Contactor 135 Amp #22922