1746-NO4I
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通信及联网
PLC通信含PLC间的通信及PLC与其它智能设备间的通信。随着计算机控制的发展，工厂自动化网络发展得很快，各PLC厂商都十分重视PLC的通信功能，纷纷推出各自的网络系统。新近生产的PLC都具有通信接接口，通信非常方便。
电源可编程逻辑控制器的电源在整个系统中起着十分重要的作用。如果没有一个良好的、可靠的电源系统是无法正常工作的，因此，可编程逻辑控制器的制造商对电源的设计和制造也十分重视。一般交流电压波动在+10%(+15%)范围内，可以不采取其它措施而将PLC直接连接到交流电网上去
中央处理单元(CPU)中央处理单元(CPU)是可编程逻辑控制器的控制中枢。它按照可编程逻辑控制器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。当可编程逻辑控制器投入运行时，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，最后将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。
为了进一步提高可编程逻辑控制器的可靠性，对大型可编程逻辑控制器还采用双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。
VIDEOJET CIRCUIT BOARD
VIDEOJET CIRCUIT BOARD
VIDEOJET 375080SMT CIRCUIT BOARD
VideoJet 600552 Rev 11 PCB Circuit Board Assembly NWOB
VMIC VMIVME 1330 Circuit Board Legend A - Used
VMIC VMIVME 4120 Circuit Board VMIVME4120 - Used
VMIC VMIVME 7452 Circuit Board VMIVME7452 - Used
VMIC VMIVME 7587 Circuit Board 7587 - Used
VMIC VMIVME 7587 Circuit Board VMIVME7587
Warner & Swasey PCB Circuit Board
WATERBURY D CIRCUIT BOARD
WCBS5EF OL Card Cutler-Hammer Printed Circuit Board 1A96725E51 (NEW) (CC1)
Welding Technology Corp Circuit Board CHS-T2050 Used #49251
WESTINGHOUSE BASE DRIVE CIRCUIT BOARD REV-2 3D17162G01
WESTINGHOUSE TURBINE GENERATOR CONTROL CIRCUIT BOARD 7379A62G02
WESTINGHOUSE TURBINE GENERATOR CONTROL CIRCUIT BOARD G57
WESTINGHOUSE3D17187G0 CIRCUIT CARD, PC BOARD, IN FACTORY SEALED BAG, H116
XERMAC CIRCUIT BOARD_PCB_21103 AA AO40
XERMAC CIRCUIT BOARD_PCB_22004 REV A A080
XYCOM D , GENERAL PURPOSE I/O 1805 CIRCUIT BOARD #219521
XYCOM 82029BC E PCB CIRCUIT BOARD D507689
Xycom XVME-677 Circuit Board XVME677 677-1 Rev 1.2 - Used
YAMATAKE HONEYWELL IBC ASSEMBLY PCB CIRCUIT BOARD
YASKAWA * CIRCUIT BOARD DFA0 * JANCD-XCP01C-1 REV A02
YASKAWA * MISSING TOP CIRCUIT BOARD * CACR-UP130AAB
Yaskawa CACR-IRCB-30SB Circuit Board DFB0 _ CACR-IRCB Power Supply
YASKAWA CIRCUIT BOARD CACR-SRCA20M ZTYO ZTY0 A DFA0 REV.A
YASKAWA CIRCUIT BOARD CPCR-MR-CM-04 DF REV.D
YASKAWA CIRCUIT BOARD DFBO / JANCD-XMM01-2 REV.B
YASKAWA CIRCUIT BOARD JANCD MB20 DF REV A
YASKAWA CIRCUIT BOARD JANCD-1 0 OIB JANCD-I 0 O1B DF S/N S 6
Yaskawa Circuit Board JANCD-CG02 Rev. C DF JANCDCG02
Yaskawa Circuit Board JANCD-CG23 Rev B02, JANCDCG23, DFB0, DFBO
Yaskawa Circuit Board JANCD-CG24, JANCDCG24, DF Rev C0, PALI6L8L-N33
Yaskawa Circuit Board JANCD-CG26 Rev B13, JANCDCG26, DFB1, DFB1
YASKAWA CIRCUIT BOARD JANCD-CP02 DE MORI SEIKI
YASKAWA CIRCUIT BOARD JANCD-CP04B JANCD-CP04 B DF 28 DF MORI SEIKI
Yaskawa Circuit Board JANCD-CP07C _ JANCDCP07C _ DE Rev B4
Yaskawa Circuit Board JANCD-FC120-2 _ JANCDFC1202 _ DFB0 Rev B01
Yaskawa Circuit Board JANCD-FC222_REV. B01_DFB0_KITAMURA MYCENTER-3X
Yaskawa Circuit Board JANCD-MRY01-3 Used #15253
Yaskawa Circuit Board JANCD-MSV01-2 Rev E01 Used #76710
YASKAWA CIRCUIT BOARD JANCD-SR02 DE
YASKAWA CIRCUIT BOARD JANCD-XCP01C-1 REV A03 DFAO
Yaskawa Circuit Board JPAC-C341.A, JPACC341A, ETC502852.01, 88-12, CDR62
YASKAWA CIRCUIT BOARD MODULE_JANCD-XCP01B-1_REV B01_JANCD-XIF04-1_REV A0
Yaskawa Circuit Board Motherboard JANCD-MB20E _ JANCDMB20E _ DF Rev A02
YASKAWA CIRCUIT BOARD XCP01C-1 REV A03
YASKAWA CIRCUIT BOARD_JANCD-FC240_ REV.D 03_DFD
Yaskawa CNC Circuit Board JANCD-CP07E JANCDCP07E Rev A01 additional DF
Yaskawa Electric ETC620 Circuit Board YPCT - Used
YASKAWA JANCD-CP03 CIRCUIT BOARD
YASKAWA JANCD-FC120-1_CIRCUIT BOARD_DFB0_REV B01_ENSHU JE60
Yaskawa JANCD-FC1902 Rev. C Circuit Board _ JANCD FC1902 _ DFC0
Yaskawa JANCD-FC200-5 Rev. E JANCDFC2005_Circuit Board_JANCD FC2005_DFA0
Yaskawa JANCD-GC26 (27) Circuit Board ! WOW
