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PLC機型的選擇的四個方面要考慮的因素
1．PLC的類型
PLC按結構分為整體型和模塊型兩類，按應用環境分為現場安裝和控制室安裝兩類；按CPU字長分為1位、4位、8位、16位、32位、64位等。從應用角度出發，通常可按控制功能或輸入輸出點數選型。整體型PLC的I/O點數固定，因此用戶選擇的餘地較小，用於小型控制係統；模塊型PLC提供多種I/O卡件或插卡，因此用戶可較合理地選擇和配置控制係統的I/O點數，功能擴展方便靈活，一般用於大中型控制係統。
2．輸入輸出模塊的選擇
輸入輸出模塊的選擇應考慮與應用要求的統一。例如對輸入模塊，應考慮信號電平、信號傳輸距離、信號隔離、信號供電方式等應用要求。對輸出模塊，應考慮選用的輸出模塊類型，通常繼電器輸出模塊具有價格低、使用電壓範圍廣、壽命短、響應時間較長等特點；可控硅輸出模塊適用於開關頻繁，電感性低功率因數負荷場合，但價格較貴，過載能力較差。輸出模塊還有直流輸出、交流輸出和模擬量輸出等，與應用要求應一致。可根據應用要求，合理選用智能型輸入輸出模塊，以便提高控制水平和降低應用成本。考慮是否需要擴展機架或遠程I/O機架等。
3.電源的選擇
PLC的供電電源，除了引進設備時同時引進PLC應根據產品說明書要求設計和選用外，一般PLC的供電電源應設計選用220VAC電源，與國內電網電壓一致。重要的應用場合，應採用不間斷電源或穩壓電源供電。如果PLC本身帶有可使用電源時，應核對提供的電流是否滿足應用要求，否則應設計外接供電電源。為防止外部高壓電源因誤操作而引入PLC，對輸入和輸出信號的隔離是必要的，有時也可採用簡單的二極管或熔絲管隔離。
4.存儲器的選擇
由於計算機集成芯片技術的發展，存儲器的價格已下降，因此，為保證應用項目的正常投運，一般要求PLC的存儲器容量，按256個I/O點至少選8K存儲器選擇。需要復雜控制功能時，應選擇容量更大，檔次更高的存儲器。
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
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