计算机控制系统也是经历了集中控制、分层控制、基于现场总线的网络控制等几个发展阶段,它们的发展过程是非常相似的。
随着企业信息网络的深入应用与日臻完善,现场控制信息进入信息网络实现实时监控是必然的趋势。为提高企业的社会效益和经济效益,许多企业都在尽力建立全方位的管理信息系统,它必须包括生产现场的实时数据信息,以确保实时掌握生产过程的运行状态,使企业管理决策科学化,达到生产、经营、管理的化状态。信息一控制一体化将为实现企业综合自动化CIPA(computerintegratedplantautomation)和企业信息化创造有利条件。
企业信息网络与控制系统在体系结构发展过程上的相似性不是偶然的。在计算机控制系统的发展过程中,每一种结构的控制系统的出现总是滞后于相应计算机技术的发展。实际上,大多数情况下,正是在计算机领域一种新技术出现以后,人们才开始研究如何将这种新技术应用于控制领域。鉴于两种应用环境的差异,其中的技术细节作了适当修改和补充,但关键技术的原理及实现上,它们有许多共同的地方。正是由于二者在发展过程中的这种关系,使得实现信息一控制一体化成为可能。
TECO WESTINGHOUSE VSD VFD AC DRIVE N3-230-N1 30HP/96A 230V 3PHASE IN 230V OUT
Teco, Westinghouse Motor,150HP 445TS Frame 460 Volt 3600 RPM AEP01-00-02699
Teco/Westinghouse C03125B2XX-X-N Programable motor controller starter 100HP 480V
TECO-WESTINGHOUSE GA7200-4050-N1 DRIVE 50HP 80A NNB
TECO-WESTINGHOUSE MA7200-4025-N1 DRIVE 25HP 24A NIB
TECTROL TO-825/10-0775 USPP TO
Tegal source reactor ICP CR1350-00300 with Tegal MHZ controller CR1325-00400
Tegal Vacuum Cassette Elevator VCE, 100/150MM, Left CW1299-10102
Tegal Vacuum Cassette load lock w/ HVA Gate Valve, festo cylinders, varian valve
TEGAM 1750 HI-SPEED PROGRAMMABLE MICRO-OHMMETER NO POWER CORD
TEGAM 1750 RESISTANCE MEASURING SYSTEM NO POWER CORD
TEGAM EATON GERTSCH SINGER DSRB-5CDA-4 SYNCHRO RESOLVER BRIDGE
Tegam M1110 Temperature Controlled Coaxial RF Transfer Standard -30
TEIJIN SEIKI ARS60-15 USPP ARS6015
TEIJIN SEIKI RV70C REDUCTION GEAR INDUSTRIAL STD RATION HOLLO TRANSMISSIONS
TEK AFG3252 2 Ch, 240 MHz Arbitrary Function Generator
Tek Microsystems (Tekmicro) PowerRACE-2A High-Performance I/O Controller Board
tek p7313 probe w/cal p7520 p7516 p7508
TEK TDS3014B 100 MHz, 4 Ch, Digital Phospore Oscilloscope
TEK TDS3054 Digital Oscilloscope 500MHz GOOD & CALIBRATED
TEK TDS3054B 500 MHz, 4 CH, 5GSa/s Digital Phosphor Oscilloscope w/ P6139A X4
TEK Tektronix gigaBERT 1400 generator & receiver
TEK TLA5204 136 Channel, 2 GHz Deep Memory 235 MHz State Logic Analyzer
TEK TLA5204B 136 Channel, 2 GHz Deep Memory 235 MHz State Logic Analyzer
TEK TLA721 w/ 4 X TLA7AA4 /8S 235MHz, 8MB
TEK TLA721 w/ 4 X TLA7AA4 /ES 450MHz/32MB w/16 X p6860 tla7ac4 tla7ac3 tla7ac2
tek TLA7AA4 /4S/3P 136-Channel LA 2GHz 32Mb/120MHz 4X P6860
tek TLA7AA4 ES/3P 136-Channel LA 2GHz 32Mb/450MHz 4X P6860 tla7ac4 tla7ab4
TEK/Tektronix TDS754A Digital Storage Oscilloscope 500 MHz/4 CH
Tekelec Chameleon Open-X (933-1020-05)
TEKLOGIX 7030 USPP 7030
TEKLOGIX 7030/SR USPP 7030SR
Tekmar Velocity XPT Concentrator/ 14-8900-00T
Teknor TEK-950 Passive Backplane 115V WOW
Tekrez O Rings 7540CR 20
Tekscan PB - 100D sensor equilibration device
Tekscan PB100B sensor equilibration device
Tekteronix MTS4EAB /VC1/USB MPEG-4 VC-1 Compressed Video ES Analyzer V6.02
Tektronix - 80C01-CR 20GHz Optical WITH OPTION
Tektronix - P7313SMA 13GHz Differential SMA Probe
TEKTRONIX - TDS1012C-EDU - OSCILLOSCOPE, 100MHZ, 2 CH, 1GS/S
Tektronix 020-1693-00 SMA Accessories Kit
Tektronix 11401
Tektronix 11403A 1 GHz Digitizing Oscilloscope with 3 Plug-ins, Option 1s
TEKTRONIX 11403A DIGITAL OSCILLOSCOPE SERIAL NO.B010182 Powers On
Tektronix 11801A Mainframe Oscilloscope
Tektronix 11801C Digital sampling oscilloscope
Tektronix 11801C Digital Sampling Oscilloscope
TEKTRONIX 11801C DIGITAL SAMPLING OSCILLOSCOPE + SD24 + SD20
TEKTRONIX 1240 USPP 1240
Tektronix 1405 NTSC Television TV Sideband Adapter
Tektronix 1405/03 NTSC TV Sideband Adapter
Tektronix 1502C
Tektronix 1502C Cable Testers w/ Battery
Tektronix 1502C metallic TDR
TEKTRONIX 1502C Metallic TDR Cable Tester
Tektronix 1502C Metallic TDR Cable Tester - Excellent Condition
Tektronix 1502C TDR - bright display - 1
Tektronix 1502C TDR Cable Tester
Tektronix 1502C with option 04/05 TDR Cable Tester
Tektronix 1705A, Spectrum Monitor, Refurbished
Tektronix 1710J Waveform Monitors; FOUR (4)
Tektronix 1730HD
Tektronix 1735
Tektronix 1735 HD
tektronix 1740 A waveform/vector monitor
TEKTRONIX 1740 USPP 1740
Tektronix 1740A
Tektronix 1755A
Tektronix 176
TEKTRONIX 1780R VIDEO WAVEFORM MEASUREMENT SET
Tektronix 1GHz 5 GS/s Color Four Channel Digitizing Oscilloscope TDS 684A
Tektronix 2 Channel Color Digitized Osilloscope Model#-TDS3052 TDS-3052 Caled
Tektronix 2432A
Tektronix 2465A ( 350 MHz 4-channel ) oscilloscope, NIST- calibrated
Tektronix 2465B Analog Oscilloscopes
Tektronix 2467B
Tektronix 2467B 400MHz Osc