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目前，PLC在國內(nèi)外已廣泛應(yīng)用于鋼鐵、石油、化工、電力、建材、機(jī)械制造、汽車、輕

紡、交通運(yùn)輸、環(huán)保及文化娛樂等各個(gè)行業(yè)

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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、用戶程序及工作數(shù)據(jù)。存放系統(tǒng)軟件的存儲(chǔ)器稱為系統(tǒng)程序存儲(chǔ)器;存放應(yīng)用軟件的存儲(chǔ)器稱為用戶程序存儲(chǔ)器；存放工作數(shù)據(jù)的存儲(chǔ)器稱為數(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)行讀寫操作的隨機(jī)存儲(chǔ)器存放用戶程序，生成用戶數(shù)據(jù)區(qū)，存放在RAM中的用戶程序可方便地修改。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?，即可用個(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。

Pertron Processor Board Rev D 1400213 #3322

Pertron Circuit Board 1300060  #7595

PerTron Controls Relay  Board 1400288 Paragon I/O #5134

SCI Circuit Board 080-2463 REV F, 180-2463 Rev H  #25094

SCI Circuit Board 080-2432,180-2432 Rev C #24167

SCI Circuit Board 080-2382, 180-2382  Rev F D #25167

NEW SCI Circuit Board 080-2370 Rev H, 180-2370 Rev G #22209

SCI PC Board, 080-2473, Rev. B  Solid Controls Inc   #14649

SCI Circuit Board 080-2432 REV D, 180-2432 #5906

SCI Circuit  Board 080-2443 Rev K , 180-2443 Rev A  #14629

SCI Circuit Board 080-2403 Rev J, 180-2403 Rev G #25081

SCI Circuit Board 080-2382 180-2382  #25168

SCI Circuit Board 080-2339, 181-2339 #36449

SCI Circuit Board 080-2472-1 Rev B, 180-2472 Rev D #37812

SCI Circuit Board 080-2389, 181-2389-D #36448

NEW Sullins PC Board & Rack EZM18HRMH-S38, SCI #24722

SCI Circuit Board 080-2487, 181-2487 #37849

SCI Control Board 180-2382 Circuit Card #14894

SCI Circuit Board 080-2369-2 Rev K, 180-2369 Rev E #24153

SCI Circuit Board 21994 REV B, 51950 REV B #29821

SCI Circuit Board 080-2470 Rev F,  180-2470 Rev B #25099

SCI Circuit Board 080-2370 Rev E, 180-2370 Rev G, #25157

SCI Gate Expander Board REV B 180-2355, 1802355 #14887

SCI Circuit Board 080-2369 Rev G,180-2369 Rev B #24122

SCI Circuit Board 080-2369-2 Rev K, 180-2369 Rev D #24152

SCI Circuit Board 080-2369 Rev L, 180-2369 Rev E #24135

SCI Circuit Board 080-2469 Rev F, 180-2469 Rev A #25100

SCI Circuit Board 080-2432 REV D, 180-2432 REV C #24168

SCI Circuit Board 080-2369-2 Rev M, 180-2369 Rev E #24163

SCI PC Board  080-2458 Rev B, 180-2458 Rev A     #14633

SCI Circuit Board 080-2382 Rev D,  180-2382 Rev B #25169

SCI PC Board 180-2458 Rev A, 080-2458 Solid Controls #14631

SCI Circuit Board 180-2440 REV D, 080-2440 REV H #5903

SCI Circuit Board 080-2369-2 Rev J,180-2369 Rev D #24077

SCI 080-2306 Rev H Circuit Board Logic Module #7132

SCI Circuit Board 080-2403, 180-2403 Rev F #25074

SCI Circuit Board 080-4000-1 Rev B, 180-4000 REV I #31561

SCI Circuit Board 080-2472-1 Rev A, 180-2472 Rev A #14637

SCI 080-4002 Quad 12 VDC Input Card #7185

SCI Circuit Board 080-2369-2 Rev P, 180-2369 Rev EH #24079

SCI Circuit Board 080-2434 180-2434  #25085

SCI Circuit Board 080-4010-4 #37833

SCI Circuit Board 080-2403 Rev F, 180-2403 Rev B #25073

SCI Circuit Board 080-4000 REV C, 180-4000 REV B #42778

SCI Circuit Board 21994 REV A, 51950 REV B #42791

SCI PC Board 080-2354, REV A, 180-2354 #22564

SCI Circuit Board 080-2369 Rev P, 180-2369 Rev EH #24141

SCI Circuit Board 080-2370 Rev E, 180-2370 Rev D, #25153

SCI Epic CPU Board 22288, Rev D, 52013 Rev B #29856

SCI Circuit Board 080-2369, 180-2369 Rev EH #24052

SCI Circuit Board 080-2370 Rev D, 180-2370 Rev D #24087

SCI Circuit Board  21649 B, 51457 Rev. E  #24202

SCI Circuit Board 080-2369-1 Rev P, 180-2369 Rev EH #24071

SCI PC Board 080-4000-1 REV B, REV B 180-4000 #31285

New SCI PC Board 080-2354 Rev E, 180-2354 Rev D #22656

SCI Circuit Board 080-2382 Rev C, 180-2382 Rev A #25131

SCI Circuit Board 080-2369-1 Rev K, 180-2369 Rev E  #24066   

NEW Sullins PC Board & Rack EZM18HRMH-S38, SCI #24725

SCI Circuit Board A-10285-1  #14650

SCI Circuit Board 080-4002 REV A, 180-4002 REV A #33164

SCI Circuit Board 21994 REV A, 51950 REV B #42786

SCI Circuit Board 080-4002 REV B, 180-4002 REV B #42819

SCI Circuit Board 080-2369 Rev K, 180-2369 Rev D #24133

SCI Circuit Board 080-2354 Rev E, 180-2354 Rev D #27897

SCI Circuit Board Quad AC Output 52411 REV B #7183

SCI Circuit Board 080-2472-1 Rev A, 180-2472 Rev A #14637

SCI Circuit Board 080-2403 Rev H, 180-2403 Rev F #25080

NIB SCI Circuit Board 080-2370 Rev E, 180-2370 Rev H #24324

SCI 080-2354 Rev D Quad Logic Circuit Board #7134

SCI PC Board 080-2354 Rev E, 180-2354 Rev D   #22618

SCI Circuit Board 080-2369-1, 180-2369 REV D  #24067

SCI Epic Control Card 080-2369, 180-2369 REV D, #15206

Greyhill Keypad 88BB2-072 #37711

SCI Circuit Board 080-2458 Rev B, 180-2458 Rev B #25098

SCI 180-2432 Control Card Circuit Board, #5906

SCI Circuit Board 080-2403, 180-2403 Rev A #25072

SCI Circuit Board 080-2369 Rev M, 180-2369 Rev E or EG #24139

Kawasaki PC Board TOY5362C #14029

SCI Circuit Board 080-2369-1 Rev N,180-2369 Rev E,G #24140

SCI Circuit Board 080-2415-1 180-2415  #25083

SCI Circuit Board 080-2469 180-2469 Rev D / AC #25102

SCI Circuit Board 080-2403 Rev E, 180-2403 Rev B #25075

SCI Circuit Board 080-2403 Rev G, 180-2403 Rev C #25077

SCI Circuit Board Gate Expander Logic 080-2355, 180-2355 Rev A #7137

SCI Circuit Board 21981 REV A, 51768 REV D, Epic System 10 #42785

SCI Circuit Board 080-2369-2 Rev N,180-2369 Rev EG #24165

SCI Control Card 080-2305 Rev P, 180-2305 Rev MP Circuit Board #14904

SCI Circuit Board 080-2414 180-2414 Rev G / BD #25082

SCI PC Board  080-2415-1   Solid Controls Inc   #14634

SCI PC Board 080-2305-4-5 Rev S, 180-2305  #22537

SCI PC Board 25952, Circuit Board #64467

SCI Circuit Board 080-2451 180-2451  #25095

SCI Circuit Board 080-2435 180-2435  #25086

SCI Circuit Board 080-4000L #29825

SCI Control Board 080-2370, 180-2370 Rev C, #14919

NEW SCI PC Board 080-2311 REV B, 180-2311 #22550

SCI Circuit Board 080-2369 Rev K, 180-2369 Rev E #24123

SCI Circuit Board 080-2370 Rev E, 180-2370 Rev H #25152

SCI Circuit Board 080-2370 Rev G/E,  180-2370 Rev H #25162

NEW SCI Circuit Board 080-2369-1Rev P, 180-2369 Rev EH #25134

Solid Controls 080-2459 Injection Mold PC Board #15199

SCI Epic  PC Board 23123-2 Rev HC #25359

SCI PC Board, 080-2462, Solid Controls Inc   #14651

SCI Circuit Board 080-2439, 180-2439 Rev A #37846

Keba Circuit Board II011 2005B-0 #22740

SCI PC Board, 080-2414, Solid Controls Inc   #14647

SCI Circuit Board 080-2370 Rev E, 180-2370 Rev G, #25160

SCI Circuit Board 080-2355 Rev E, 180-2355 Rev B #27860

SCI Circuit Board 21963-5 Rev.C, 62622 Rev A B #36070

SCI Epic ACIM (D) Circuit Board, REV A, 22857-L, #25402

Solid Controls 080-2463 Injection Mold PC Board #15200

SCI Circuit Board 080-2312 Rev C  #25124

SCI PC Decade Board 080-2484, 180-2484 #37851

SCI Circuit Board 080-4000 REV B, 180-4000 REV B #42821

NIB SCI Circuit Board 080-2403 180-2403 Rev J #25071

SCI Circuit Board 080-2467 180-2467  #25120

SCI Circuit Board 21858 REV C, 51688 REV E,  #29824

SCI PC Board   080-2434   Solid Controls Inc    #14641

SCI Epic DC Output Card 23722L Rev D #7121

SCI Circuit Board 080-2312 Rev C  #25121

SCI PC Board   080-2396   Solid Controls Inc    #14640

SCI PC Board   080-2441  Solid Controls Inc   #14636

SCI PC Board, 080-2439, Solid Controls Inc   #14646

SCI PC Board, 080-2451, Solid Controls Inc   #14642

SCI Epic ACIM (D) PC Board, 22857, #25406

SCI Epic Process Control Board, REV M, 23657, #25396

SCI Injection Molding  Circuit Board 21648 Rev. B  #36587

SCI Epic PC Board 23391 Rev C #25401

SCI Circuit Board 25224-2 Rev B #6000

SCI Circuit Board 080-2439 180-2439 Rev B / A #25087

SCI Circuit Board 080-2458 Rev E, 180-2458 Rev B #37839

SCI Epic PC Board 23391  #25467

SCI Epic 23391-1  PC Board Rev C #25388

SCI Epic Circuit Board 22890-1 REV G #25404

SCI Epic Circuit Board 22890-1 REV J #24714

SCI Circuit Board 080-2424-2 180-2345 Rev B / E #25231

SCI Epic D/A PC Board, REV G, 22992-6, #25397

SCI PC Board 080-2473 Rev I #5763

SCI Epic BMC Mother Board 22938 #38507

SCI Circuit Board 080-2440 REV B, 180-2440 REV A #14648

NIB SCI Circuit Board 080-2385 180-2385 Rev G/H #25111

SCI Circuit Board 080-2312 Rev C D #25125

SCI PC Board 080-4000-1, REV C 180-4000 #31281

SCI Epic ACIM (D) Circuit Board, 22857-1L, #25369

SCI Circuit Board 080-2441 180-2441 Rev C / B #25089

SCI Circuit Board 080-2330 Rev F 180-2330 Rev C #27899

SCI CPI Injection Mold Circuit Board 21648, #15197

Sonshine Electronics Circuit Board 401A #24197

SCI Circuit Board 63521 #44687

SCI Epic Operator Interface Circuit Board 22939-1 #5751

SCI Epic I/O PC Board, REV A, 23399, Circuit Board #25367

SCI Velocity Compensation Board 080-2485 180-2485 #37845

SCI Circuit Board 080-2490,180-2490 Rev A #24193

SCI Extension Board 080-2312 Rev. C / F #5765

SCI Epic PC Board 22992-8 #43774

SCI Epic ACOM (D) Circuit Board, 22858-2L, #25341

SCI Epic Operator Interface Circuit Board 22939-1 #5752

SCI Circuit Board 080-2473 / 180-2473 REV I/FD #24177

NIB SCI Circuit Board 080-2370 Rev E, 180-2370 H, #25182

SCI Circuit Board 23709,  52469  #63987

SCI PC Board   080-2435   Solid Controls Inc #14638

SCI Circuit Board 21858 REV B, 51688 REV E #36615

SCI Epic D/A PCB 22992-2, Circuit Board #25395

SCI Epic D/A PC Board, REV H, 22992-6, #25455

SCI Circuit Board 22288 REV A, 52013 REV A, Epic CPU #42771

SCI Circuit Board 21945 REV A, 51748 REV A Epic Scanalyzer #31568

SCI Epic Control Board 23085 #43772

SCI PC Board, 080-2432-4, Solid Controls Inc  #14656

SCI PC Board 080-2472-1 Solid Controls Inc #14627

SCI 51457 Rev E Circuit Board Solid Controls #7151

SCI Epic Circuit Board 22890-1 REV G #25404

SCI Injection Molding  Circuit Board 21648 Rev. B  #36579

SCI Circuit Board 22858-2, 52339, Rev. C  #43775

SCI Epic Operator Interface Circuit Board 22939-1 Rev. S  #5754

SCI Epic Operator Interface Circuit Board 22939 Rev. T #5753

SCI PC Board 080-4000 REV D, 180-4000 REV C #31282

SCI Epic PC Board 23391 Rev. B #5873

SCI EPIC 23720L Rev E, ACIM PCB Circuit Board #7001

SCI Circuit Board 080-2473 Rev I #25765

SCI Epic ACIM(D) PC Board 22857-L Rev E #25475

SCI Circuit Board 21945 REV B, 51748 REV A Epic Scanalyzer #31569

SCI Solid State Electronic Control Board LS2308-A1 #42964

SCI Epic Line Position Circuit Board 23020 #25450

SCI Circuit Board 22939-1 Rev. T 23163-1, Rev  L, 63757  Rev B #5871

SCI Epic Aux I/O M'BD PC Board Rev H #25501

SCI Epic BMC Mother Board Temperature Sensor 22938 REV T #25526

SCI Epic BMC Mother Board 22938 REV AE #25524