GE HE693THM889C

中央处理单元(CPU)

中央处理单元(CPU)是PLC的控制中枢。它按照PLC系统程序赋予的功能接收并存储从编程器键入的用户程序和数据;检查电源、存储器、I/O以及警戒定时器的状态，并能诊断用户程序中的语法错误。当PLC投入运行时，首先它以扫描的方式接收现场各输入装置的状态和数据，并分别存入I/O映象区，然后从用户程序存储器中逐条读取用户程序，经过命令解释后按指令的规定执行逻辑或算数运算的结果送入I/O映象区或数据寄存器内。等所有的用户程序执行完毕之后，后将I/O映象区的各输出状态或输出寄存器内的数据传送到相应的输出装置，如此循环运行，直到停止运行。

为了进一步提高PLC的可靠性，近年来对大型PLC还采用双CPU构成冗余系统，或采用三CPU的表决式系统。这样，即使某个CPU出现故障，整个系统仍能正常运行。

二.存储器

存放系统软件的存储器称为系统程序存储器。

存放应用软件的存储器称为用户程序存储器。

(一)PLC常用的存储器类型

1. RAM (Random Assess Memory)这是一种读/写存储器(随机存储器)，其存取速度快，由锂电池支持。

2. EPROM (Erasable Programmable Read Only Memory)这是一种可擦除的只读存储器。在断电情况下，存储器内的所有内容保持不变。(在紫外线连续照射下可擦除存储器内容)。

3. EEPROM(Electrical Erasable Programmable Read Only Memory)这是一种电可擦除的只读存储器。使用编程器就能很容易地对其所存储的内容进行修改。

GE Multilin UR RHV 125-250 VAC    *16E2*

1pcs Used GE Multilin EL1608

[Used] GE MULTILIN  UR RHH  POWER MODULE, 1pcs

GE MULTILIN UR 8LH ,CTVT

GE Multilin UR9GH CPU 9G 12A0-0082-A3 PLC RS485 10Base-F UR-9GH General Electric

GE Multilin, Used  F650BFCF2G0HI  Digital Bay Controller, 110~250VDC, 30W

GE Multilin UR6EH UR 6EH UR Model #A7

GE MULTILIN M60 DIGITAL IO  90days warranty via DHL or FedEx #A6

[Used] GE Multilin  UR 6HH  DIGITAL IO, 6 Form-A Outputs, 4 Contact Inputs

WESTERN ELECTRIC 261AL RELAY USE WITH WECO P-206115 CONTACTS

[Used] GE Multilin  UR 8SH   CTVT, Standard 7ECT1EVT, 12A0-0305-A2

GE Multilin 369 Motor Management Relay 369-HI-R-M-0-E<wbr>-0-E~For PARTS REPAIR

Ge Multilin 650 fmod136-01 Numérique Aires Contr?leur

GE Multilin 350 Feeder Protection System, For Parts Repair

GE Multilin MIV II Digital Feeder DeviceDevice MIVII1000E00HI<wbr>00 Volltage Protect

[Used] GE MULTILIN  M60G03HKHF8LH6<wbr>NM8NP6MU5AWXX  FRONT PANEL, CASE

NEW GE Multilin ML1600HIXXABAC<wbr>X  ML1600 Managed Fiber Switch

GE Multilin, Used  F650BABF1G0HI  Digital Bay Controller, 110~250VDC, 30W

GE MULTILIN 489 Générateur Gestion Relais 489-P1-HI-A20-<wbr>E (Pour Pièces Only)

GE Multilin 1228-0001-D3 T-800 Transorb Board SR469 806504 General Electric

GE MM300-GEH1SCAD<wbr>XX Multilin Motor Management Relay ~ For PartsRepair

GE MULTILIN F650 F650BABF2G0HI6<wbr>E BAY CONTROLLER 110-250V120-2<wbr>30V

[Used] GE MULTILIN  UR 6DH  DIGITAL IO CARD, Class A, 1pcs

GE Multilin UR Series F35 Feeder Protection Sys Rack + Front Panel F35J03HLHF8LH

GE Multilin UR9GH CPU

GE MULTILIN 489 GENERATOR MANAGEMENT RELAY 489-P1-HI-A20-<wbr>T  SR489-CASE

GE MULTILIN F650 F650BABF2G0HI6<wbr>E Bay Kontroll- 110-250V120-2<wbr>30V

[Used] GE  T60H03HKHF8LH6<wbr>NM8NP6TU6DW7H  T60 CASE, FRONT PANEL

NEW original FOR GE MULTILIN UR 8NH module 90 days warranty

GE MULTILIN 750 Feeder Management Relay 750-P5-G5-S5-H<wbr>I-A10-R (FOR PARTS ONLY)

Relay GE MULTILIN MIW II Power Relay GE Multilin Model MIWII1000E00HI<wbr>00

[Used] GE  UR 9HH  CPU CARD, 9H, RS485, 10Base-F, 12A0-0082-A3, Class A

LOT OF 14 -   WHITE-RODGERS 90-380 Relay, 24 VAC, Fan Relay NEW.

GE Multilin 350 Mangeoire Protection Système 350-E-P1-G1-H-<wbr>E-M-C-N-3E-D-N

GE Multilin 369 Motor Management Relay 

GE Multilin Motor Manager II MMII-PD-1-2-24<wbr>0 Inteligent Mcc Kontroll- 240VAC

[Used] GE  T60G03HCHF8LH6<wbr>NM8NP6PU6CW7H  T60 FRONT PANEL, CASE 1

GE Multilin F650 Digitale Bay Controller F650NXBF1G1HI6

GE Multilin D60 Line Entfernung Schutz Relais D60K03HKHF8LH6<wbr>DM67P67U6HW

Ge 339-E-P5-G5-H-<wbr>R-S-N-N-1E-D-N Multilin 339 Feeder Protection Relay 120-240v-ac

GE MULTILIN 650 F650BABF1G0HI Digital Bay Kontroll- 110-250VDC120<wbr>-230VAC

GE MULTILIN MMII-PD-1-2-MO<wbr>D616-120 MOTOR MANAGER II, VER. 60000121.616, 120VAC

GE MULTILIN 650 FMOD136-23 FEEDER PROTECTION RELAY F650BABF1G0LO 110-250VDC120

GE Multilin F650 Digitale Bay Controller FMOD3-37 F650BFCF1G0HI6<wbr>E Bay Joystick

GE MULTILIN P4A-120 MOTOR PROTECTION RELAY GE MULTILIN PROTECT4A 

GE Multilin 1228-0003-D2 SR469 I-700 Analog IO Subsystem Board Relay D2 806500

GE Multilin MM300-GEHD2CAB<wbr>C MOTOR PROTECTION SYSTEM

?? GE GENERAL ELECTRIC MULTILIN 869 MOTOR PROTECTION SYSTEM 869-EP5P5B5HRR<wbr>ANNGMP

[New Other] GE MULTILIN  UR 9GH  CPU CARD, 1pcs

GE Multilin F650 Digitale Bay Controller FMOD3-39 F650MXCF1G4HI6<wbr>E

GE Multilin 1228-0001-D3 S-400 Switch Board SR469  SR489 DWG 806502 Rev. D3

GE Multilin MTM PLUS120VAC,Tra<wbr>nsducer Module ~ For Parts Repair