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PLC的中央处理器（CPU 一般由控制器、运算器和寄存器组成，这些电路都集成在一个芯片内。CPU通过数据总线、地址总线和控制总线与存储单元、输入/输出接口电路相连接。

    与一般的计算机一样，CPU是整个PLC的控制中枢，它按PLC中系统程序赋予的功能指挥PLC有条不紊的进行工作。CPU主要完成下述工作：

    （1）接收、存储用户通过编程器等输入设备输入的程序和数据。

    （2）用扫描的方式通过I/O部件接收现场信号的状态或数据，并存入输入映像寄存器或数据存储器中。

    （3）诊断PLC内部电路的工作故障和编程中的语法错误等。

    （4） PLC进入运行状态后，执行用户程序，完成各种数据的处理、传输和存储相应的内部控制信号，以完成用户指令规定的各种操作。

    （5）响应各种外围设备(如编程器、打印机等）的请求。

    PLC采用的CPU随机型不同而不同， 目前，小型PLC为单CPU系统，中型及大型则采用双CPU甚至多CPU系统。目前，PLC通常采用的微处理器有三种：通用微处理器、单片微处理器（即单片机）、位片式微处理器。

CUTLER HAMMER * 400A 2 POLE TRIP UNIT * MT2400T

GE FANUC 24VDC 10A FIELD POWER SUPPLY IC690PWR124A

SQUARE D TYPE FA 20A 60HZ 480VAC 250VDC CIRCUIT BREAKER FA24020AB

GE FANUC SERIES SIX I/O HI CAPACITY POWER SUPPLY

LAMBDA 24V 4.8A REGULATED DC POWER SUPPLY LOS-W-24

BALL SCREW + NUT, OVERALL LENGTH 32" NNB

POWEREX POW-R-BLOK CD411699 8747

RANSBURG POWER PCB ASSY PN 74735 REV A PCB 74734 REV A

ALLEN BRADLEY OUTPUT MODULE 1771-OYL

WINSMITH SPEED REDUCER 920MDNE

HOFFMAN WIREWAY FITTING F-44LE9A SEALED BOX, NIB

MORRELL SINGLE MOTOR SIGNAL CABLE MC94172000-035, NIB

CUTLER HAMMER * 800A 2 POLE TRIP UNIT * MT2800T

CUTLER HAMMER * 800A 2 POLE TRIP UNIT * MT2800T

CLARK MATERIAL HANDLING CONTACTOR 911329 NIB

NUMATICS SOLENOID 118AD449D

COSEL POWER SUPPLY R25U-24

LAMBDA 24V 6.5A SWITCHING DC POWER SUPPLY LSS-39-24

ELCO ENTERPRISES POWER SUPPLY P50E-24 102873

SOLA +15VDC 4.5A REGULATED POWER SUPPLY SLS-15-045

DELTRON 24DC 1.2A DC POWER SUPPLY W112A

GE AUXILIARY RELAY MCRCO40AT NIB

TRAN/SCAN TRANSFORMER 1051849A

PHOENIX CONTACT 20/U NNB

GENERAL ELECTRIC CIRCUIT BREAKER 40 AMP E11592

INTERNATIONAL CYBERNETICS CYBERLINE 1000 BRUSHLESS SERVO POWER SUPPLY 110-0144

BOSCH D-64711 ERBACH SERVO UNIT 1070 079399-103 W/ PSI 6100.650L1

HONEYWELL I/O RACK POWER SUPPLY MODULE 621-9934

KEYENCE LED BAR LIGHT CA-DBR13

SMC VJ3133

SORENSEN POWER SUPPLY PTM15-1.5D

TDK-LAMBDA 100-240VAC 4.1A DC POWER SUPPLY MODULE HWS300-24/HD

MITSUBISHI ELECTRIC RM30TA-H POWER MODULE

ACOPIAN REGULATED POWER SUPPLY A14MT300

PHOENIX CONTACT 24VDC 2.5A DC POWER SUPPLY QUINT-PS-100-24?0AC/24DC/2.5

MESA POWER SYSTEMS RACK MOUNT STEP-DOWN TRANSFORMER MODULE 10717 / 61304

IMV * POWER SUPPLY * NETPRO 19"

ACOPIAN REGULATED POWER SUPPLY A13MT800

SYNOPTICS LATTISNET 460W POWER SUPPLY MODEL 3002

YASKAWA CONTROLLER SERVO POWER SUPPLY JZRCR-XPU06B

NSD CORP. CABLE 689888 NIB

ALLEN-BRADLEY CO 96628502 H01 POWER SUPPLT MODULE NIB

ALLEN BRADLEY INPUT RFI FILTER 1336-RFB-16A

LAMBDA 16W POWER SUPPLY LVT-40-144-B

ACOPIAN MINIATURE AC TO DC POWER MODULE D15-30

DAIHEN CORPORATION 180A DC WELDING POWER SUPPLY CPVMB-180

CONTROL ENGINEERING COMPANY 31053 DC POWER SUPPLY NIB

ABB ROBOTICS POWER SUPPLY MODULE DSSR 110

ONEAC 120VAC 3.2A POWER SUPPLY FT1103

POWER DISTRIBUTION CABLE DE-4653-935-001 REV B

OMRON 24VDC 50W POWER SUPPLY UNIT C200HW-PD024

LAMBDA ELECTRONIC 105-127VAC 210-250VAC 47-63Hz 125W REV.C POWER SUPPLY LNS-Y-24

SERVOWELD 6.00"STROKE 5MM/REV 1850LBS 325VDC 22A SW ACTUATOR SW44

AEG MODICON POWER SUPPLY P933

SOLA STB 115V 24VDC 3.0A POWER SUPPLY 28-2204

PHOENIX CONTACT QUINT 2.5 PS-120AC/24DC/2?.5 POWER SUPPLY

SINE SYSTEM CABLE 875422 CA-A411-0118-A 11 PIN NNB

WATLOW 340C-2602-1000 TEMPERATURE CONTROL BOARD

SHINDENGEN * POWER SUPPLY * EY05005U

YASNAC YASKAWA ELECTRIC POWER SUPPLY CARD CPS-18F

SOLA GLS-03-040 SWITCHING POWER SUPPLY NIB

ALLEN BRADLEY REMOTE I/O SCANNER DISTRIBUTION PANEL 1772-SD

LAMBDA LVT-39E-144 REGULATED POWER SUPPLY (19756-308)

ACOPIAN REGULATED POWER SUPPLY B24G500

HONEYWELL POWER SUPPLY XP502

DEA120-CORD CABLE W.L GORE CABLE ASSEMBLY 174594-2000

LAMBDA ELECTRONICS 24VDC 4.5A DC POWER SUPPLY LSS-38-24

YASKAWA YASNAC 2.9A 200-230VAC POWER SUPPLY CPS-18FB / VZY21871

DETAS 24VDC 15A SWITCHING DC POWER SUPPLY 001716 GSA-SW15

OMRON PROGRAMMABLE CONTROLLER C200H-CN311

TDK-LAMBDA 100-240VAC 50/60HZ DC POWER SUPPLY HWS300-24/HD NIB

MARATHON ELECTRIC CONTACTOR POWER DISTRIBUTION BLOCK 1411400