PLC的主要模塊構成（系統組成圖）

PLC主要由CPU模塊、輸入模塊、輸出模塊和編程器組成(見圖1），有的PLC還可以配備特殊功能模塊，用來完成某些特殊的任務。

  1．CPU模塊 

  CPU模塊主要由微處理器(CPU芯片)和存儲器組成。在PLC控制系統中廠CPU模塊相當于人的大腦，它不斷地采集輸入信號，執行用戶程序，刷新系統的輸出；存儲器用來儲存程序和數據。

  2.I/O模塊 

  輸入(1nput)模塊和輸出(Output)模塊簡稱為I／O模塊，它們是系統的眼、耳、手、腳，是聯系外部現場設備和CPU模塊的橋梁。   

輸入模塊用來接收和采集輸入信號，開關量輸入模塊用來接收從按鈕；選擇開關、數字撥碼開關、限位開關、接近開關、光電開關、壓力繼電器等過來的開關量輸入信號；模擬量輸入模塊用來接收電位器、測速發電機和各種變送器提供的連續變化的模擬量電流、電壓信號。

    開關量輸出模塊用來控制接觸器、電磁閥、電磁鐵、指示燈、數字顯示裝置和報警裝置等輸出設備，模擬量輸出模塊月手來控制調節閥、變頻器等執行裝置。   

圖1 PLC控制系統示意圖 

  CPU模塊的工作電壓一般是5V，而PLC的輸入／輸出信號電壓一般較高，如直流24V和交流220V。從外部引入的尖峰電壓和干擾噪聲可能損壞CPU模塊中的元器件，或使PLC不能正常工作。在I／O模塊中，用光耦合器、光電晶閘管、小型繼電器等器件來隔離PLC的內部電路和外部的I／O電路，I／O模塊除了傳遞信號外，還有電平轉換與隔離的作用。

  3．編程器   

    編程器用來生成用戶程序，并用它進行編輯、檢查、修改和監視用戶程序的執行情況。手持式編程器不能直接輸入和編輯梯形圖，只能輸入和編輯指令表程序，因此又叫做指令編程器。它的體積小，價格便宜，一般用來給小型PLC編程，或者用于現場調試和維護。

    使用編程軟件可以在計算機的屏幕上直接生成和編輯梯形圖、指令表、功能塊圖和順序功能圖程序，并可以實現不同編程語言的相互轉換。程序被編譯后下載到PLC，也可以將PLC中的程序上傳到計算機。程序可以存盤或打印，通過網絡，還可以實現遠程編程和傳送。

    4．電源   

    PLC一般使用220V交流電源或24V直流電源。內部的開關電源為各模塊提供DC 5V，±12V，24V等直流電源。小型PLC一般都可以為輸入電路和外部的電子傳感器(如接近開關)提供24V直流電源，驅動PLC負載的直流電源一般由用戶提供。

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YASKAWA BOARD JASP-WRCA01B

Equipe TECHNOLOGIES ESC-100 ROBOT CONTROLLER SET-UP FOR:ATM-4519

YASKAWA DC BRUSHLESS MOTOR DRIVER CBTR SN18A-TS5 VER 0.2A,TSR184F-1 N.N5723-1

TOSHIBA PROSEC T3 PLC,TPS361-S,IF?311,PU326H,SN32?1 SSN321-MS,DI335?H MC392,DO334,

KLA INSTRUMENTSINTE?RFACE 1 PHASE 3 BOARD,710-65808?6-20 C0

LINX 7300 MAIN CONTROL PCB BOARD TESTED/WORKING

KLA INSTRUMENTS 8IB BOARD,710-65301?6,FAB 073-653015 REV B1

KLA INSTRUMENTS DP BOARD,710-65009?9-20 I2,FAB 073-650098-00 C0 #1

JDS UNIPHASE LASER 1135P-3500,AND LASER POWER SUPPLY 1216-2 WORKING

KLA INSTRUMENTS BOARD 710-609995-003 AA

GSI LUMONICS LINEAR SERVO ACTUATOR,TRILOG?Y EMC&LVD,COPLEY CONTROL 7225DC DRIVE

LEICA LEITZ PL FLUOTAR, ∞/- 2.5X/0.07,32X/0?.75,100X/0.90,5?0X/0.85,20X/0.4?5

LEITZ WETZLAR LENS ∞/0 PL APO 150X/0.90 D

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KLA INSTRUMENTS 8IB BOARD 710-659465,FAB 073-653015-00 B1

BROOKS AUTOMATION 001-1951-02 REV C9 BOARD,PN 11951,PCB 11950

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YASKAWA CONTROLLER JZRCR-XC002B

EPSON COMPUTER PC-486HA,PC486H?A2 AC100V WORKING

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NIKON PLAN 40/0.55,160/0-2?.5 ELWD

KLA ALIGNMENT PROCESSOR [AP2] BOARD,710-65804?1-20 REV A0,FAB 073-655005-00 A1

KLA ALIGNMENT PROCESSOR PHASE 3 BOARD,710-65804?1-20 REV C0,FAB 073-658040 A0

KLA ALIGNMENT PROCESSOR [AP2] BOARD,710-65804?1-20 REV A0,710-655005-0?0 REV A1

POWER TEN DC POWER SUPPLHY 0-5V,0-365AMP,P?62B-5325D

TOSHIBA PROSEC T3 PLC,TPS361-S,IF?311,PU326H,SN32?1 SSN321-MS,DI335?H MC392,DO334#

IMADA MV-500N-II,DPS-?20R, DIGITAL FORCE GUAGESES FULL AUTOMATIC,FUNCT?IONAL.

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MIYACHI COMPACT LASER WELDER ML-2130A,2030B,?CHILLER

MIYACHI COMPACT LASER WELDER ML-2130A,2030,P?OWER MODULE

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FUJI MICREX-F FPU120S,PROCESS?ON UNIT CPU FPU120S-A10

ELECTRO CRAFT BRU-200 DM-30 9101-1133 BRUSHLESS SERVO DRIVE RELIANCE

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KLA FFA ASSY BOARD 710-610522-000/?AB

ANELVA NANO-SCOPE,MICR?OSCOPE 911-9150,TOKYO OLYMPUS R10X

TAMAGAWA SEIKI TBL DRIVE TA8056N1

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MKS ASTEX PRODUCTS TSP REMOTE,ASTEX GMBH PN 14-0040-002

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KPE,KIMBALL PHYSICS ELECTRON GUN POWER SUPPLY EGPS-1106

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NEC NRC-400II BOARD MC5-A 163-237410

COGNEX IN-SIGHT 1700 800-5748-10 WAFER READER

NEC NRC-400II D8F 193-230044 DU8F1E

HD 17-50-163055, HARMONIC DRIVE SYSTEMS,GEAR,GE?ARHEAD,REDUCER,

FUJITSU FPF8050HRUC-001?,N16B-5241-0001?,S1506-PC2613

HD 17-50-205545, HARMONIC DRIVE SYSTEMS,GEAR,GE?ARHEAD,REDUCER,

HD SF14-50-180188, HARMONIC DRIVE SYSTEMS,GEAR,GE?ARHEAD,REDUCER #1

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RIVERDELTA NETWORKS BSR-1000 CMTS /FAIL ALAM

FUJI VME 4400 VISION CONTROL BOARD fram GRABBER COGNEX

TEL BOARD PCB PST-STD 3281-000146-12,?3208-000146-11

MIYACHI COMPACT LASER WELDER ML-2130A,2030,C?ONTROL PCB

TOB1093 CHEMICAL I/O BOARD 02A,CPC-T0081A-?12,100-T0082A-1?2,P11070074

OMRON SAFETY NETWORK CONTROLLER NE1A-SCPU01-V1

SEREN IPS 1401081000 REV D,440156100 2F,4601321000 BOARD

SEREN IPS BOARD 1400390000 REV C,4600780001,44?0119000,1400950?000,4601170000 T3

Tencor instruments I/O memory universal handler 172502 board

DAIICHI DENTSU AFC1200 SYSTEM AXIS CONTROLLER AXIS203A

DAIICHI DENTSU ARC1100 SYSTEM AXIS CONTROLLER AXIS003A

DAIICHI DENTSU AFC1100 SYSTEM AXIS CONTROLLER AXIS103A

INTERFACE AZI-2430 BOARD 'LOT OF 6'

YASKAWA SERVOPACK DRIVER SGDV-120A05A

YASKAWA SERVOPACK DRIVER SGDS-08A05A

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A-B ALLEN-BRADIEY 1771-QH A,FORCE CONTROL MODULE,1771-WF #1

KLOCKNER MOELLER DIL M 580 820-XHI, FREE SHIPPING

ORIENTAL MOTOR 5-PHASE DRIVER RKD514L-C 5-VEXTA STEPPING MOTOR A3874-9215NED

KLOCKNER MOELLER NZM 10-600N-NA 600A, FREE SHIPPING

PULSTEC MSG2-CONT BOARD 00DTC065,MSG2B-?100D

NACHI ROBOT AR CONTROLLER ROP300,U11-A01

TOSHIBA CORPORATION PI312,TPI312-S PLC

HD SF14-50-180188, HARMONIC DRIVE SYSTEMS,GEAR,GE?ARHEAD,REDUCER,

HD 17-50-180863, HARMONIC DRIVE SYSTEMS,GEAR,GE?ARHEAD,REDUCER,

HD 17-50-163055, HARMONIC DRIVE SYSTEMS,GEAR,GE?ARHEAD,REDUCER, #1

TOKYO SEIMITSU HA1120A DIVIDER BOARD[2PCS]FOR A-WD-208T

MSE 100FX 800851,POSITRON NETWORKS 220F000603-401 MSE MOTHERBOARD,220?F000604-401

TEL BOARD PCB PST OPT 3281-000095-13, 3208-000095-11

TEL PCB BOARD SIO-1 3281-000172-13,?3208-000172-13

NEC NRC-400II BOARD EXCHB 193-240197, EXCHA 193-240196 SET BROKEN

GSI LUMONICS SMART MOTOR SM2310SQ-VRE

FUJIKIN INCORPORATED PA N.C.,O.P. 0.45~0.6MPA,FS-?V31P, 316L AUJXX000 VALVE NEW

HD SF14-50, HARMONIC DRIVE SYSTEMS,GEAR,GE?ARHEAD,REDUCER,?#1

HD 17-100, HARMONIC DRIVE SYSTEMS,GEAR,GE?ARHEAD,REDUCER,?#3

HD 14-100, HARMONIC DRIVE SYSTEMS,GEAR,GE?ARHEAD,REDUCER,?#4

HD SF14-100-087360?, HARMONIC DRIVE SYSTEMS,GEAR,GE?ARHEAD,REDUCER,?#1

HD H SF14-100, HARMONIC DRIVE SYSTEMS,GEAR,GE?ARHEAD,REDUCER,?#1

TOKYO ELECTRON LTD T/B,MC-31304, 8545P08569B 2108-020122-11 2180-020434-13 NNB

FANUC BOARD A16B-2202-0420/?07E #1

VAT GATE VALVE 03009-MA24-1003?/0276 A-656507

PANASONIC AC SERVO DRIVER MDDDT3530L01,1.?0KW

KLA 073-404555-00 710-404556-00 STEPPING DRIVER BOARD

Olympus UL WD NeoSPlan50, IC50 0.55 ∞/0 f=180

FUJI FPU081A,MICREX-?F PROCESSOR UNIT CPU FPU 081A-A10 #1

LENZE AC TECH SERVO DRIVER E94R090T4NRM,E9?4ZATBO2,POSITIO?NSERVO DIGITALSERVO 941

FUJI OEM GOLDSTAR FPU120,STARCON-?MF FPU 120A

YASKAWA SERVOPACK SGDM-08ADA,SGMG?H-06ACB6B AC SERVO DRIVER MOTOR CNC WORKING

MOTOROLA MVME,VME 162-522A W/ TWO ETHERNET,LAN MODULE

LINX 7300 LCD SCREEN TESTED/WORKING

JAE JAPAN AVIATION ELECTRONICS INDUSTRY E280-000044-11,?UT3-TLN7-B

YASKAWA SERVOPACK SGDM-05ADA,SGMG?H-05ACA6C, AC SERVO DRIVER MOTOR CNC WORKING

HD 14-88-413903, HARMONIC DRIVE SYSTEMS,GEAR,GE?ARHEAD,REDUCER

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MOTOROLA MVME 162-222,01-W386?6B 48B,01-W3913B 02A BOARD

FANUC A16B-1000-0030/?04C,A20B-0008-0?440/03,A20B-000?8-0430/05A

Tencor instruments 4 Channel. motor control assy 261408 BOARD

Tencor instruments 4 Channel. motor control assy 261394 BOARD

TORAY ENGINEERING LC750 ZIRCONIUM OXYGEN ANALYZER %,PPM

TEL TOKYO BOARD E2B101-16/MCP,E?208-000001-16,3?M80-001250-17,E?280-000001-27

FANUC BOARD A16B-2202-078

FANUC BOARD A16B-2203-0990/?02A

MPC-T0059A-11 BOARD IO MTR #03A TOB1059A NEW

PANASONIC AC SERVO MOTOR MSMA252A1D 2.5KW WORKING

COGNEX CAMERA MOUNI 540-115011,REV 03,AVIIVA ATMEL CAMERA lin 540-115007.01

DRESSLER CESAR 2720 BOARD H-35-00-01

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FAST CORPORATION FV-2300 DOS IMAGING SYSTEM

GOLDSTAR FUJI STARCON-MF F80 PROCESSOR UNIT FPU080A

YASKAWA SERVOPACK SGDH-10AE TESTED WORKING

YASKAWA JUSP-WSCB60AA,J?USP-WSCA60AA WS60AA,FUJI 6R1TI30Y-080,6M?BP200RA060-06

YASKAWA SERVOPACK JUSP-WSCB 30AA,JUSP-WSCA3?0AA,JUSP-WSCD 30AA,JUSP-WS30A?A,FUJI 6

FUJI FPU081A,MICREX-?F PROCESSOR UNIT CPU FPU 081A-A10

AWARD SOFTWARE BOARD A60267-03-30 REV J

OVAL LUS52C11-A406 NEW

SBC,PC,CIS-C3A-?D1 CPU BOARD TESTED WORKING

KLA IO BOARD PART NO. 073-404423-00,A?SSY NO. 710-404420-00

SCHROFF POWER SUPPLY NETZG.MPS022

OLYMPUS MICROSCOPE BX SERIES BX-60M POWER SUPPLY,TESTED

RKC Temperature Controller REX-C2000,C2001?-4F32C-V WORKING

FANUC board bmu 256-4 A87L-0001-0018 08G

Schneider 140CRP93100 RIO HEAD NIB

YASKAWA CONTROLLER JZRCR-XSU02

MULTILIN MM300-GEHP1CACX?,PSU,CPU,IO-C,I?O-A,IO-C #2

PULSTEC O-PAS 1000A BOARD,GPIB-SUB OPA-011-01,GPIB?-MAIN OPA-010-01

ASYST TECHNOLOGIES BOARD 3200-1000-07 REV B,4001-1788-01 B IM,FAB 3000-1000-06 C

TOKYO SEIMITSU HA1136 VARIABLE POWER SOURCE TSM-LH-493 ILLUMINATOR FOR A-WD-208T

YASKAWA SGDM-04ADA,SGMP?H-04AAAGB61,HD GEARHEAD CP-25A-11-J602B?-SP,DRIVER MOTOR

KLA IO PART NO. 073-404423-00,A?SSY NO. 710-404420-00,C?D-2-94V0 43/95 BOARD

CELERITY UNIT 125 IFC-125C MASS FLOW CONTROLLER,VALV?E NC,CKD MAGD-10V-AT2-JS?3 *

PROFORT 820 TEACH PENDANT PF820-DSETM3 NEW IN BOX

RKC FAREX SRM H-PCP-A-14N-M*A?B SR MINI HG SYSTEM,H-TI0-B-?DK09-D*NN,H-TI0?-B-FK09*

PULSTEC LAND PRE-PIT DECODER 2 (DDU-S/A) PSB021DD-000-0 BOARD #2

PANASONIC SERVO MOTOR MSM021A1E,KEG2-?20 R-0111 WORKING

FUJI VME IS70B SERVO BOARD

CHEROKEE INTERNATIONAL POWER SUPPLY CAR3030,CAR3030?L1-1A

YASKAWA SERVOPACK DRIVER MOTOR SGDA-02AP,SGM-0?2A3G26,HD CP-20A-11-J602A?-SP CNC

MELEC C-823 BOARD KP1229-2

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EATON 180 CONT REMOTE PCB 1417660 B,1517660 C BOARD

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Enlarge

CONTEC PI0-64/64L(PCI) NO. 7196B BOARD

KORNIC SYSTEM DSP BOARD REV 1.2, KORNIC SYSTEM DIO BOARD Ver: 2.0

MMT MICRO MOTION TECHNOLOGY X.Y.Z. STAGE #1

MMT MICRO MOTION TECHNOLOGY X.Y.Z. STAGE #2

MMT MICRO MOTION TECHNOLOGY STAGE M1-637-L1

TSE TILT TESTFR VER:1.0 BOARD

VEXTA STEPPING MOTOR 5-PHASE A4001-9215N

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TEL STEPPING MOTOR STEPSYN 103H7522-72XS42 TS3387-010090-1?1 SANYO DENKI NEW

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CONTEC SIO-4S[98]H [9313B] BOARD

KLA INSTRUMENTS IP VME BOARD 710-806050-01 REV B1 [B1A] WORKING

KLA INSTRUMENTS IP VME BOARD 710-806050-01 REV E0 WORKING

KLA INSTRUMENTS IP VME BOARD 710-806050-01 REV D3 WORKING

KLA INSTRUMENTS IP VME BOARD 710-806050-01 REV D0A WORKING

KLA INSTRUMENTS IP VME BOARD 6001756-03 REV R0 WORKING

Kyosan HV-PS4[SD] DC POWER BOX 1.5Kg

RKC INSTRUMENT H-TI0-J-F501-8*?NN SR MINI HG SYSTEM LOT OF 2 NEW

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WESTINGHOUSE A/D CONVERT NL-1049 4-20 MA 8 BIT

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TEL TOKYO ELECTRON 2108-020110-11,?IR-MDIF-2,2181-?020110-11,TTL-T?0003 BOARD

diversified technology CXT100A ASSY 912000245 BOARD

PULSTEC PG1000-WAVE BOARD 01DTC138,PG1000?-010A

PULSTEC ERROR COUNT 2 BOARD CDR-060-01 ERROR COUNT 2 SUB PSB-14180-000-0

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THK KR33 LM GUIDE ACTUATOR,KR33A LINEAR MOTION STAGE

THK KR30 ACTUATOR

FCC ID FJS46W 70346,DIGI BOARD

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BECKHOFF BK7520,KL1488 [9],KL2488 [6] KL9010

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ANRITSU HAMLET RF PCB BOARD 50147-1-2 REV 6,50010,50012 REV 7,50011,50013

KLOCKNER MOELLER NZM7-250N FREE SHIPPING NEW

FUJI ELECTRIC FVR.K7S INVERTER FVR037K7S-2

CONTEC PI0-64/64L(PCI) NO. 7196B BOARD #2

IPM06A CM902WX AC/DC存儲器后備電源組件

FBM201b P0922YH 8通道0-100mV輸入接口組件

FBM201c P0922YJ 8通道0-5V輸入接口組件

FBM201d P0922YK 8通道0-10V輸入接口組件

FBM202 P0926EQ 8通道熱電偶/毫伏輸入接口組件

FBM203 P0914SV 8通道0-320熱電阻輸入接口組件

FBM203b P0922UA 8通道0-640熱電阻輸入接口組件 

FBM203c P0922UD 8通道0-30熱電阻輸入接口組件 

FBM204 P0914SY 8通道0-20mA輸入輸出接口組件 

FBM205 P0914XG 冗余8通道0-20mA輸入/輸出接口組件

FBM206 P0916CQ 8通道脈沖輸入接口組件

FBM207 P0914TD 16通道電壓監視輸入接口組件(可選冗余)

FBM207b P0914WH 16通道24Vdc觸點輸入接口組件(可選冗余) 

FBM207c P0917GY 16通道48Vdc觸點輸入接口組件(可選冗余)

FBM208 P0914TB 4通道0-20mA輸入/4通道0-20mA輸出組件

FBM211 P0914TN 16通道0-20mA輸入接口組件 FBM212模塊

FBM213 P0914XL     14通道熱電偶輸入接口組件 FBM213模塊

FBM214 P0914XN     8通道熱電阻輸入接口組件 FBM214模塊

P0914XQ     8通道HART通訊輸入接口組件 

FBM215 P0922VU 8通道HART通訊輸出接口組件 

FBM216 P0922VV 冗余8通道0-20mA/HART輸入接口組件

FBM217 P0914TR 32通道離散量輸入接口組件(可選冗余)

FBM218 P0922VW 冗余8通道0-20mA/HART輸出接口組件 

FBM219 P0916RH 24通道電壓監視輸入,8通道離散量輸出接口組件

FBM220 P0917HA 1通道H1 FOUNDATION 現場總線接口組件

FBM221 P0917HB 4通道H1 FOUNDATION 現場總線接口組件

FBM223 P0917HD 2通道PROFIBUS-DP 現場總線接口組件 

FBM224 P0926GG 4口RS-232、RS-422或RS-485與Modbus組件

FBM237 P0914XS 冗余8通道0-20mA輸入接口組件

FBM241 P0914TG 8通道電壓監視輸入,8通道離散量輸出(外部源) 

FBM241b P0914WK 8通道電壓監視輸入,8通道離散量輸出(內部源)

FBM214c P0914WM 8通道觸點輸入，8通道離散量輸出（外部源）組件

FBM214d P0914WP 8通道觸點輸入，8通道離散量輸出（內部源）組件

FBM240 P0917GZ 冗余輸出接口組件

FBM242 P0916TA 16通道離散量輸出（外部源）接口組件（可選冗余）

FBM243 P0914TK 8通道雙向FoxCom雙波特率智能設備接口組件 

FBM246 P0914XN 冗余8通道雙向FoxCom雙波特率智能設備組件 2、 現場總線通訊組件

FCM10E P0914YM (將10Mbps的以太網信號轉換為2 Mbps信號，用于D型導軌安裝式現場總線組件（成對冗余現場總線使用）

FCM10EF P0916CD (將10Mbps的光纖信號轉換為2 Mbps信號，用于D型導軌安裝式現場總線組件（成對冗余使用）

P0904AP