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#图片仅供参考#
1．*处理单元（CPU）
CPU作为整个PLC的核心，起着总指挥的作用。CPU一般由控制电路、运算器和寄存器组成。这些电路通常都被封装在一个集成电路的芯片上。CPU通过地址总线、数据总线、控制总线与存储单元、输入输出接口电路连接。CPU的功能有以下一些：从存储器中读取指令，执行指令，取下一条指令，处理中断。
2．存储器（RAM、ROM）
存储器主要用于存放系统程序、用户程序及工作数据。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；存放工作数据的存储器称为数据存储器。常用的存储器有RAM、EPROM和EEPROM。RAM是一种可进行读写操作的随机存储器存放用户程序，生成用户数据区，存放在RAM中的用户程序可方便地修改。RAM存储器是一种高密度、低功耗、价格便宜的半导体存储器，可用锂电池做备用电源。掉电时，可有效地保持存储的信息。EPROM、EEPROM都是只读存储器。用这些类型存储器固化系统管理程序和应用程序。
3．输入输出单元（I/O单元）
I/O单元实际上是PLC与被控对象间传递输入输出信号的接口部件。I/O单元有良好的电隔离和滤波作用。接到PLC输入接口的输入器件是各种开关、按钮、传感器等。PLC的各输出控制器件往往是电磁阀、接触器、继电器，而继电器有交流和直流型，高电压型和低电压型，电压型和电流型。
4．电源
PLC电源单元包括系统的电源及备用电池，电源单元的作用是把外部电源转换成内部工作电压。PLC内有一个稳压电源用于对PLC的CPU单元和I/O单元供电。
5．编程器
编程器是PLC的zui重要外围设备。利用编程器将用户程序送入PLC的存储器，还可以用编程器检查程序，修改程序，监视PLC的工作状态。除此以外，在个人计算机上添加适当的硬件接口和软件包，即可用个人计算机对PLC编程。利用微机作为编程器，可以直接编制并显示梯形图。
Shibaura H0550554 Circuit Board #24965
Shibaura H076374 Inj Molder Circuit Board #6764
Shibaura H0811932 Operator Interface #6725
Shibaura H055055-7 PC Board #8915
Shibaura H0550555 Circuit Board H0550565 #24969
Shibaura H0550565 Inj Molder Circuit Board #6753
Toshiba PC Board 22-242, #12307
Toshiba Circuit Board H093640, #6912
Toshiba Circuit Board H181747 #65522
Toshiba Circuit Board F0307102 #65529
Toshiba H086232-0 Circuit Board #6793
Toshiba Control Card L231461 #29028
Toshiba H0936891 PC Driver Board #6727
Toshiba Programmable Controller Board H150356-1 X1M9 #65528
Toshiba H0936901 PC Board #6729
Toshiba H03790-1 Inj Molder Circuit Board #6761
Toshiba Circuit Board H1007794 #64806
Toshiba L231461-2 Speed Control Board #14849
Toshiba Circuit Board H1693473 #65385
Toshiba L231461-2 Control Board #6794
Toshiba H01200-3 Inj Molder Circuit Board #6759
Toshiba H01199-3 Inj Molder Circuit Board #6760
Toshiba H01196-3 Inj Molder Circuit Board #6762
Toshiba H0936930 Inj Molder Circuit Board #6768
Van Dorn Pathfinder Circuit Board PC-330081 PC #5722
Van Dorn Circuit Board PC330-039 #61616
Van Dorn Communications Breakout Box 307308 #23966
Control Process Van Dorn M-10118 PC Board #27380
Van Dorn 99865 Circuit Board #22122
Van Dorn Circuit Board 99865 #38443
Van Dorn Back Board PC-0330-019 Pathfinder J2BP #22785
Van Dorn Circuit Board PC330-021 #61615
Van Dorn Pathfinder 4500 Control Card PC330-019 #51560
Van Dorn Analog Terminal Board 330039, PC330-039 #51556
Ziatech ZT8952-S167B IDE Interface #10274
Ziatech Ciruit Board ZT8954-2 Floppy Drive #10275
Ziatech PCB ZT89CT39 Circuit Board Slot X Arbiter #10281
Ziatech Circuit Board ZT8801 #7861
Ziatech Circuit Board ZT89CT90 #10283
Ziatech PC Board ZT88CT73, #6583
New Caddy Pipe Clamp RIGD0050EG #39778
Mold die Clamp, Open Toe, 7" x 2" x 1.5" #26081
New ZSI Inc Cushioned Clamp 008T012 1/4" Pipe #41461
New ZSI Inc Cushioned Clamp 008T012 #39949
New ZSI Inc Cushioned Clamp 012T016 #39948
New ZSI Inc Cushioned Clamp 030N034 #39951
New ZSI Inc Cushioned Clamp 038N044 #39950
New Hydrazorb Cushioned Clamp 100150, 1 1/2" Tube OD #41506
Armstrong C Clamp 78-110 #37393
DeStaco Clamp 213-U *NEW* #15727
JH Williams C Clamp No. 118 Drop Forged #37402
Mold Die Clamp #DHC 40 without bolt #35954
Festo Electric Parallel Pneumatic Gripper HGP-20-A-B #52243
New Dixon 1" Hose Clamp DL14 #39902
DeStaco Toggle Clamp 331 #40307
IMS Mold Die Clamp F0-7 #37570
PPE Mold Die Clamp 5 x 2 x 1 1/2 #35960
Mold Die Clamp Open Toe #37573
New Unistrut Cushioned Clamp 027N032 #39815
New Unistrut Cushioned Clamp 017N022 #39863
New Unistrut Cushioned Clamp 021N026 #39873
Incoe Hydraulic Mold Clamps 35T124 #58338
New B Line B351L-1/2 Pipe Hanger / Beam Clamp #28724
Armstrong C Clamp 78-412 13 1/2" Throat #37407
Armstrong C Clamp 78-118 19" Throat #37399
JH Williams Heavy Service C Clamp CC-4A #37385
Gruvlok U-Bolt Branch Clamp 7045 3X1 #19217
Schunk Pneumatic Gripper PGN 64/1 #63831
New Aluminum Hinged Clamp #40595
DeStaco Toggle Clamp 331 #40306
New Cushioned Clamp 014T018 7/8" Tube OD, 1/2" Pipe #41503
Mold Die Clamp Open Toe AC-4F0 #37569
Armstrong C Clamp 106 7" Throat #37396
New Caddy Pipe Clamp RIGD0150EG #39777
New Unistrut Cushioned Clamp 016T020 #39872
New Caddy Pipe Clamp RIGD0400EG #39776
New A & N Corporation Aluminum Clamp QF40-CW #39787
New Kurt J Lesker Swing Clamp QF50-200-C #39789
JH Williams C Clamp No. 6 #37398
New B Line B351L-1/2 Pipe Hanger / Beam Clamp #28723
New Cush-A-Clamp 034T040 2 1/8" Tube OD #41509
New A & N Corporation Hinged Toggle Clamp QF40-C #39788
New A & N Corporation Hinged Toggle Clamp QF40-C #40477
SMC Parallel Type Gripper MHZ2-20DNW #27399
PHD Pneumatic Parallel Gripper 19070-0041 #21822
BEX K-Ball Zip-Tip Pipe Clamp ZF6540 L #34415
NEW DeStaco Toggle Clamp 331 #40308
Super Clamp C Clamp No. 44-X #37395
NEW DeStaco Toggle Clamp 331 #40308
Super Clamp C Clamp No. 44-X #37395
Armstrong 16 C Clamp 7 1/4" Throat #37389
New Hinged Clamp #40603
JH Williams C Clamp 15 #37408
SMC Pneumatic Double Acting Gripper MHQJ2-20D #52066
AGI Parallel Gripper AGLP-4 T-Slot Bearing #20929
PHD Pneumatic Parallel Gripper 19070-2-0041 #21821
JH Williams C Clamp No. 108 #37397
PPE Closed Toe Mold Clamp #57542
JH Williams C Clamp No. 6 #37394
New Hinged Clamp QF25-100-C #40602
NEW DeStaco Hold Down Action Clamp 225-U #40310
Schunk Pneumatic Gripper PGN 64/1 #61408
Mold Die Clamp Closed Toe FC6-625 #35948
Armstrong C Clamp 110, Throat: 11", #37391
JH Williams C Clamp CC-118 #37403
New Leviton Wire Mesh Safety Grip L7728 Strain #30746
Armstrong C Clamp No. 110 11" Throat #37392
Tops-All Clamps Closed Toe Mold Die Clamp XHD-1012 #35943
New MDC Manufacturing Hinged Clamp 701003 #40597
New Hinged Clamp #40590
Lot of 3 Mold Die Clamps NR-050 Closed #26107
Flexcor Male Support Grip STB-125SF #28184
NEW Smith Blair Redi Clamp 245-00023603-000 #27207
New MKS Hinged Clamp NW50 #40596
DeStaco Hold Down Action Clamp 225-U #40309
BTM Corporation Pneumatic Power Clamp 779800G-733207YH-90AL-SCDC #53199
New ZSI Inc Cushioned Clamp 014N018 #39947
DeStaco Horizontal Handle Hold Down Action Clamp 215-U #40311
New Box of 10 DuPage Hose Clamp B44HS #32286
New Cushioned Clamp 024N028 1 1/2" Tube OD #41505
NEW Hunt Strut Clamp Fig 5R Rigid Fastener #19739
New MDC Manufacturing Hinged Clamp 701002 #40601
BTM Corp Power Toggle Clamp PC 2500 #3529
PHD Pneumatic Parallel Gripper 19070-2-0041 #21823
BTM Corporation Toggle Clamp PC-1500-V-130-BM #63860
New Cushioned Clamp TCC0100CP 1" Tube OD #41504
JH Williams C Clamp No. 118 #37400
Destaco Pneumatic Heavy Duty Clamp 860-MR #40482
BTM Corporation Pneumatic Power Clamp STC52VP-120-73320?-90AL-SCDC #57569
JH Williams C Clamp No. 8 Drop Forged 9" Throat #37390
New Cush-A-Clamp 3" Tube OD Clamp 050N054EG #41501
NEW Smith Blair Redi Clamp 245-00019003-000 #27208
New Oz Gedney Coduit C Clamp CBC-1 #28713
Staubli Hydraulic Quick Clamp System 100 120 00 #57226
JH Williams C Clamp No. 10 #37416
Smith Blair Full Circle Repair Clamp 226-00066312-000 #5250
New Allen Bradley 1494V-H1 Handle Kit Series A #32269
Schunk Pneumatic Gripper w/ Sensors & Air Lines 303539 #52393
Staubli Hydraulic Clamp 100 120 SP #60401
BTM Corporation Pneumatic Power Clamp STC52VP-1420-73320H-90AR-SCDC #57571
Closed Mold Die Clamp 12" x 3" x 3" #20227
Tops-All Clamps Open Toe Mold Die Clamp XHD 1011 #35942
Tops-All Clamps Closed Toe Mold Die Clamp HD1250 #35944
BTM Corporation Pneumatic Power Clamp 779800G-733207H-90AR-SCDC #57582
Armstrong C Clamp No. 8 #37409
Armstrong C Clamp No.20 10 10/16" Throat #37414
New A & N Corporation Aluminum Clamp QF50-CS #40172
BTM Pneumatic Power Clamp STC52VP-120-733207H-90AL/R/SCDC #57588
BTM Corporation Pneumatic Power Clamp 779800G-733207YH-90AL-SCDC #57578
Armstrong C Clamp No. 12 Drop Forged #37412
BTM Corporation Pneumatic Power Clamp STC52VP-120-733207H-90AL-SCDC #57556
BTM Corporation Pneumatic Power Clamp 779800G-733207H-90AL-SCDC #54639
New BTM PC Power Toggle Clamp 00144 #2246
