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PLC机型的选择的四个方面要考虑的因素

1．PLC的类型
   PLC按结构分为整体型和模块型两类，按应用环境分为现场安装和控制室安装两类；按CPU字长分为1位、4位、8位、16位、32位、64位等。从应用角度出发，通常可按控制功能或输入输出点数选型。整体型PLC的I/O点数固定，因此用户选择的余地较小，用于小型控制系统；模块型PLC提供多种I/O卡件或插卡，因此用户可较合理地选择和配置控制系统的I/O点数，功能扩展方便灵活，一般用于大中型控制系统。

2．输入输出模块的选择

输入输出模块的选择应考虑与应用要求的统一。例如对输入模块，应考虑信号电平、信号传输距离、信号隔离、信号供电方式等应用要求。对输出模块，应考虑选用的输出模块类型，通常继电器输出模块具有价格低、使用电压范围广、寿命短、响应时间较长等特点；可控硅输出模块适用于开关频繁，电感性低功率因数负荷场合，但价格较贵，过载能力较差。输出模块还有直流输出、交流输出和模拟量输出等，与应用要求应一致。可根据应用要求，合理选用智能型输入输出模块，以便提高控制水平和降低应用成本。考虑是否需要扩展机架或远程I/O机架等。

3.电源的选择

PLC的供电电源，除了引进设备时同时引进PLC应根据产品说明书要求设计和选用外，一般PLC的供电电源应设计选用220VAC电源，与国内电网电压一致。重要的应用场合，应采用不间断电源或稳压电源供电。如果PLC本身带有可使用电源时，应核对提供的电流是否满足应用要求，否则应设计外接供电电源。为防止外部高压电源因误操作而引入PLC，对输入和输出信号的隔离是必要的，有时也可采用简单的二极管或熔丝管隔离。

4.存储器的选择

由于计算机集成芯片技术的发展，存储器的价格已下降，因此，为保证应用项目的正常投运，一般要求PLC的存储器容量，按256个I/O点至少选8K存储器选择。需要复杂控制功能时，应选择容量更大，档次更高的存储器。

UniOP EL-25-0045 KDP03A 

Bently Nevada 3300/50 Tachometer Monitor 3300/50-02-01

ITE/Gould U4C3225 225A 3W 225A 

Square D I-Line LI36300 300A 

Merlin Gerin CK800H 800 Amp 

Toshiba TD007AC 120A @ 480V TD 

Dover/ThyssenKrupp DSP - 6300DE35 - PCB 630CL28 

Reliance Electric 15 HP 15V4151 GV3000/SE VS 

ThyssenKrupp/Dover DSP - 6300DE39 - PCB 630CL33 

Telemecanique VX5A66D12N4 

Economy Fuse RFL 2700 Type RF Fuse 2700 Amps 750 

Fuji Electric Hakko Monitouch V808iCD 

Exide Electronics 118302582 C 

Square D PFC34020GN 20 Amp 3PH 4W 480V 

Bently Nevada Dual Vibration XY/Gap  3300/16-05

Bently Nevada Dual Vibration  3300/16-05

Bently Nevada Differential  3300/45-XX

Robotron WTC C042835 Series 115 w/ 

Westinghouse 2609D60G24 1200 Amp AB 

Hitran AH1115-00 0501 In: 520-700-780 

ITE I-T-E HNB3F800 800 Amp Breaker w/ 700A Trip KMB3T70

ITE I-T-E HNB3F800 800 Amp Breaker w/ 800A Trip KMB3 T8

Toshiba VT130G1-2270BOH ESP-130 25HP 75A 208/230 V 

Allen Bradley GuardMaster 442L-TA41230CACD 

Allen Bradley GuardMaster 442L-TA41230DACD 

NEW AB / Stromberg 5761129-4G

Siemens ITE Breaker SJD69200NT 200 Amp 

General Electric GE CR306F104 Size 4 Starter CR306F NIB

ABB CI-626 Drive Administrator  PLC 6106124

Square D PKA-36200GN 200A 3PH 4W 600V 

Siemens 6ES5955-7NC11 SIMATIC S5 

NEW GE SB363RGR 100A Spectra 3PH 3W/G 600V 

NEW Yaskawa JAMSC-B2743 PLC 

Kuka KSD1-64 Type E93DA143I4B531 Id No 00470202 

Kuka KSD1-64 Type E93DA143I4B531 Id No 00423972 

Cutler Hammer Eaton F10 Unitrol Size 4 Starter 150 Amp 

Square D NR&D EPE5-TCP-D EPE 5 

Moore 39PSR4ANBN Powerac APACS  Rack 16114

OPW 3620F 0601 6" A356 

atlas ATM1900T 19", Monitor

Unico 2400 40 HP 

Ovation Process  5X00225G01 

Reliance Electric H-3007-N-H00AA 3PH 

Merlin Gerin CK1200HH 1200A 

Siemens Breaker SJD69200NGT 

NEW General Electric DIACA5A 

Robotron WTC Series 115 w/ Weldbasic 

Honeywell 621-9939C Serial 

Square D MXF36400G 400 Amp I-Line 

Honeywell Measurex GXP 054176 02 Video 

Allen Bradley 2100 600 Amp 

ABB SAFT-158-EFS Rev A 

Square D I-Line NA361000 1000A 

Allen-Bradley PowerFlex 700S 10 HP 480V 

Omron CJ1H-CPU65H CPU Unit 128K 

Allen-Bradley PowerFlex 700S 10 HP 480V AC 

York 031-01730-000 Rev C 

Square D PowerLogic PM870U PM8RDA 

General Electric GE 7700 70 & 100 Amp 12" 

Ovation Analog Output . 5X00167G01 PLC 

Ovation RTD Input (8 Channel) Module 5X00119G01 

Square D Model 6 Size 3 Fusible 

GE Multilin 269-100P-120 VAC 

General Electric GE 7700 40 & 100 Amp 12" Dual 

ITE/Siemens UFC3250 250A 600V 3PH 3W 

Allen Bradley 1336F-BRF20-AN-EN-HCS2-LA1-L6 

Allen-Bradley 1336F-BRF30-AN-EN-HCS2-LA1-L6 

Yaskawa CACR-HR20UB 

Semikron SKiiP 84EC12IT1 

Metso Automation RT Node Module D200137 ACN RT 

Warner Electric SECO SV3420-01100 SV3000 

Schweitzer SEL-121F 

Allen Bradley 2100 Centerline 600 Amp 

Cutler Hammer A201K3EA Size 3 5-Pole 

Westinghouse Size 3 2100 100 Amp MCCB 

NEW Chromalox 252814 Emerson NIB 182MP DMW-5 

Yaskawa USAGED-09L22K AC 

Yaskawa USAGED-09L22K AC 

ITE Siemens SJD69400NGT 400 Amp 

Mitsubishi NEW Melsec A4UMCA-32E 

Allen Bradley GuardMaster 442L-TA40930CACD 

Allen Bradley GuardMaster 442L-RA40930CBCD 

Allen Bradley GuardMaster 442L-TA41230DAC 

Cutler-Hammer Eaton F10 Unitrol 400 Amp 

Square D I-Line MJA36800 MJ 800 Amp 

Basler Electric BE1-25 Sync-Check Relay M1H A6P N4U1F 

NEW Westinghouse 151D927G02 CLT 2 Fuse 15.5kV 

Fanuc A05B-2210-C011 MIG Eye 

Allen Bradley 2100 Centerline Size 3 C60 

Refurbished ABB BHL-RR Servo Amplifier BHL985/12/300 

Control Techniques 7004-0193 AC VS 

Toshiba VT130G2-22705PC 25 HP Tosvert-130G2 

Square D Size 4 8736-SF03 H20S 

Westinghouse Type W 200 Amp 

Bently Nevada 75689-01 Process Data Manager 80587-01 

Metso Automation RT Node Module D200619 w

NEW Eurotherm TC 2000 75A Two 

Westinghouse DC Contactor Type MD-120 Style 493A564G03

Allen-Bradley 1336S-AQF50-AA-EN-HA1-L4 5 HP 

CH Cutler-Hammer HND3800T32W 800A 

GE 685X37 JVM-5 60:1 BIL 95 kV 7200V 1500VA / 1000VA 

Triconex 2750 Analog Digital 

Allen Bradley 20BD014A3AYNANB0 

Westinghouse A21M1CAC

Reliance Electric 57552-4E 

Vickers FAS-K2-120-030-00-02-00 

GE Multilin 269-100P-120 VAC 

General Electric SFF202B1A 

Hitachi J300-220HFU 30/40HP 54A 460V 

MSA Ultima XE Gas Monitor XP-E-33-U34-S-2-0-0-0-0-1

Hitachi HFC-VWS 16HF3D 20 HP S3D AC

ABB Drives AIO86-8/4 Analog 

Schneider Electric ATV61HU22N4 3HP 400-480V

Square D SD-3855 Saflex 400A - 600A 

Control Techniques 9204-0116 MDA75

Cutler Hammer 542L PanelMate 500 IDT 92-01404-00 

Basler Electric BE1-59N 

Cutler Hammer 2100 100 Amp 

Westinghouse ND312TW 1200A 

New Allen Bradley 284D-FVD2P3Z-10-CR-3-SB-OC

GE General Electric 4D01HHA003XM DS303A 

ABB DSTC 452 Master Modem 5751017-A/1

GE General Electric SKPA36AT0800 800A 

New Allen Bradley MPL-A320H-MK22AA 

Square D CM4000 PowerLogic 

Square D FC4IMA24C SurgeLogic 

Toshiba VT130G7U4110 G7 Adjustable 

New Cutler Hammer 2100 Size 3 100 Amp 

General Electric THLC436250 400A 

Square D PFC34015G 15 Amp 3PH 3W 480V 

Westinghouse HMCP400F5W 400A 

Square D I-Line NX361200 1200A 

Square D KCJ34150 150A 

Merlin Gerin CJ400H 36057 400A 

Micro Motion F050S113SRAUEZZZZ 1/2" 

Westinghouse FDP266 600A 600V 

Westinghouse T73CLS Digitrip RMS 700 

GE General Electric THJS3603GA3 300A 

Allen Bradley 2100 400 Amp 

Square D I-Line LC36350 350A 

Square D PBCF5A225TB 225 A 240V 

Micro Motion 3300P1A00B1UEDZZ 

Square D I-Line LC36450 450A 

General Electric 7098 20" 600 A Amp