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一般來講,控制系統網絡可分為3層:信息層、控制層和設備層(傳感/執行層)。傳統的控制系統在信息層大都采用以太網,而在控制層和設備層一般采用不同的現場總線或其他專用網絡。目前,以太網已經滲透到了控制層和設備層,很多的PLC和遠程I/O供應商都能提供支持TCP/IP的以太網接口的產品。以太網之所以給自動化市場帶來風暴式的革命,主要有3個原因:低成本的刺激和速度的提高;現代企業對實時生產信息有越來越多的要求;以太網的開放性和兼容性。
早期的以太網,多節點共享同一個傳輸媒體,稱為共享以太網(Shared Ethernet),節點間通信采用廣播方式,易發生沖突。共享以太網用CSMA/CD技術來避免沖突,即發送方檢測到沖突就暫停發送,隨機延遲一段時間后再重新發送直到成功。由于延遲時間是隨機的,不能事先知道,因而共享以太網的時間響應具有不確定性,不能用于強實時性場合。
交換以太網(Switched Ethernet)的出現克服了這一缺點,以太網的交換機(Switch)是數據鏈路層(ISO/OSI參考模型第二層)的多端口網橋,也可以說是智能分配器。交換機將其管理的網絡以星型拓撲結構劃分為許多物理上互相隔離而邏輯上互相聯系的節點,每一節點單獨與交換機建立物理連接,在通信的時候交換機會在發送端口與接受端口間建立一個獨占的全雙工通道,它具有以太網的全部帶寬并避免沖突。
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LOMAR APP LA-SVP-IO04-RD 02SVP2460 LASTRA Attrezzature 000ELE0568
4 x EPCOS B40K275 Varistor B40 K275 set of 4 as 1 lot
DuraTrue DT60-005 32-113-344 True Planetary Gearhead Ratio 5:1
ARCO DD3 ISA IDE RAID DupliDisk 085-00697-0000 23R5661
National Instruments PCI-DIO-96 PCI-DIO96 193758a-01 IBM FRU 19P5156
New PP-31-0451-00 PP-31-0451-NR.1 M.W. Berg Inc Worm Wheel
New Vishay P13TP 4k 7Ohms or P13TP-47KR-20% Potentiometers
U-ULS100HG U-ULH Olympus Replacement Lamp USH-102D
NEW Clipsal C-BUS2 LE5508TDSI DSI Gateway 8 Channel C-BUS 2
borgwaldt type 87212312 E71-S570
NEW clipsal c-bus 2 telephone interface * BNIB
New Sumitomo RNHM2-53T-B-40 HYPONIC Drive Ratio 40 1.5kw 200V 3ph
New clipsal energy controller 5610/240/2k4 2400VA 240V BNIB
4022 476 0251 ASML MB004-000V104 Power-One 3.3/5V +/-12V
Kramer 2535-019200 Power supply 100-240VAC +5VDC -5VDC
Sony XC-HR70 wiht 25mm Temaron Lence Machine Vision CCD Camera
Siemens 6EP5 135-1AA00 91632 Siemens 6EP5-135-1AA00 91632
New robitech 980-4525 pneumatic valve set
Applied Motin Products 3540Mo 1000-137 Rev C Microstepping Motor Drives
RT4800 Sailor RT 4800 VHF Thrane & Thrane A/S
AF 120-R/E Shinko AF-120-R/E Analog Temperature Indicating Controller
PF-96B1C-M RKC Series RE-96 temperature controller
6ES7 361-3CA01-0AA0 Siemens Simatic S7-300 6ES7-361-3CA01-0AA0
8 Port Artic 168 ISA Adapter 061-01327-0001 Rev 01
ELBA SMP/LC150/M1/AS/SC power supply
ASML 4022.636.45521 RSMR4
Fanuc IC670MDL640J 24VDC POS/NEG In 16PT
6ES5465-7LA13 siemens simatic S5 Analog Input 6ES 5465-7LA13
05517-68201 5517B Agilent Helium Neon Gas Laser with controller 05517-60003
Haltec TSR 43S-5/15A 53 1240 1017 110/230-240V 47-63Hz 70VA power supply
Ge Fanuc GENIUS IC660TBD023K Term. ASM. 24VDC 16PT Sink
Bautz Art. Bez M256B-00101 AC Servo Motor M256B00101
Radisys 060-00874-0006 EPC 2x25 EPC2325R-126-512 PICMG SBC 23R5692 IBM BIOS
New 10 x Clipsal 30SPK/2 Audio connector RCA X 2 white 5 packets of 2 each
Red Lion Controls Model SCP SCP00400 Counter
CMR 900-46 Display Panel MONITORING ALARM C-M-R Group CMR Korea CMR 900
hub city Assy # 0221-15161 Model 150 Ratio 1/1 Style A
LIN ENGINEERING 5618S-01-02 1.8 DEG Step Motor
SUN NI National Instruments Interface Card Assy 181155-01 Rev A SB-MXI MXIBus
Mitsubishi A970GOT-TBA HMi Panel A9GT-BUSS & A9GT-FNB4M Memory Cassate 4MB
Solenoid 195205-228 STA Series Saia Burgess inc
Danfoss VLT6008HT4C54STR3DLF00A00C0 9.3KW 380VAC VLT6000 HVAC
National Instruments AT-GPIB/TNT 181830-01 Rev D ISA interface
Applied Motion 5014-842D 5014842D Stepper Motor PVI 4.3V 1.0A/ 4.3Ohms 200S/R
WTD-03A Agie NR. 630623 620.161.7 pull from AgieCut 100D+F Agie EDM
DRC ENCODER F21AJ4EDB06-1000 Dynamic Research Corp.
ASML 4022.471.69822 Module 5500W Comp Lamp
LSC-L65F KYOTO DENKIKI VARI-LIGHT High Frequency Luminous Supply
ASML 4022.471.73124 PAAC 400/16 PPCA
MDM-15D 186.012 motor driver pull from AgieCut 100D+F Agie EDM
RVSI NerLite SCDI-75-LED P/N 301001 Rev D RVSI Vision
RVSI NerLite SCDI-75-LED P/N 301000 Rev A RVSI Vision
CCT-0001 Rev B ABSIMB1028 Backplane Board CyberCash Technology Pty Ltd
ANORAD 800320 MERS50 J00Z10 5.0UM by Renishaw
CI-5010 Rev B ISA Bus serial interface Card 2 x RS232 9 Pin
Philips ACPA MK4 ACPA Atlas S700
New Type MSD 511-1 Int. 20 UM RSF Electronik Nr. 057-064062 01 011 spec. J11
Kniel System CP 8,5.2/SEMI ASML 4022.476.01311 Kniel CP8
New SMC ZSE3-0X-22 ZSE30X22 Vacuum Switch
Antares MicroSystem 20-050-0003 Rev F SBUS Card For Sun Sparc 10
DB-24C2 Rev B 4-CHANNEL OPEN COLLECTOR OUTPUT Data Acquisition Board
CMR 900-44 Display Panel MONITORING ALARM C-M-R Group CMR 900 Series
Pro-Face GP370-SC11-24V Rev A HMI Touch Panel Pull From Nitto Kogyo NRTB-1600
New Anorad SMA8515LP-11 P/N 69350-LP Motor Driver
Dual Z-Sensor 8122 291 14503 ASML 4022.436.49654
Anorad SMA8515LP-11 P/N 69350-LP Motor Driver
Advantech PCA-6782N Atom AMI Bios Ver 1.11 512MB Ram half size SBC PCA-6782
ASML Module 4022 471 4648
Vacuum output sensor ASML 4022 486 1808 2
FANUC A20B-2002-0521/05A A20B20020521 I/O board pull Nakamura-Tome NCF-1100
ASML 4022 436 14913 Motor with encoder HEDS-6540 813
Anorad 2.98 69532-1 Motor Driver
TP3-4131A024SR11 Euchner Mechanical Safety Switch TP Series
RVSI 53114 Rev B RVSI Remote Power PCB
RVSI 53114 Rev P RVSI Remote Power PCB on Scan Head
KM86420G01 Type OS 6,3 U Inductor KONE OSCILLATOR Kone Elevator
iEi PCIE-G350-R11 AMI v1.6 Intel Core 2 Quad 2.4Ghz CPU 4GB RAM PICMG 1.3 SBC
AP-PSL16S V1.1 19-Slot PICMG PCI/ISA Segmented SBC IAC Backplane Board
WD-13996-501 Rev D Assy WD-13996-501-T Rev C for PALOMAR 3500 DIE PLACEMENT CELL
WD-15953 Assy WD-15953-T Rev 0 PWA X
WD-12870-002 PWA TCB W/MEZZ SERVO SYS 2
WD-15644-501 PWA S2C W/DIGITAL MEZZ + AC TERM NEW
BSD-1458-001 Lamp LED clusters for PALOMAR 3500 DIE PLACEMENT CELL
Allen-Bradley 2706-B23J16 Ser G Rev A Ctrl FRN 3.01 85-265VAC
New Unitech MR-380-2 Fixed Data Collection Terminal 256K MR380-2
New WD-16956 Amplifier GLENTEK GA375-2VM X Axis
New Pacific Scientific 4VM82-000-6 Servo Motor WD-12557
WD-15660-T PWA Y Axis UMB Interface NEW
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New 7080-9050 CARTRIDGE ASSEMBLY 8P HIGH OUTPUT TS7000
New WD-14904-T PWA LT Current Receiver 3500
New WD-16957-001 Amplifier GLENTEK GA375-2VM Y Axis
ASML 4022 472 58471 green laser sensor box 4022.472.58471
Microscan MS-850 FIS-0850-0004 Fixed Barcode Scanner
Omron ZEN-10C1AR-A Programmable Relay AC100-200 24VDC
Yaskawa CP-9300EX 87930-20000 Module
6ES5 090-8MA01 Siemens Simatic S5-90U 6ES5-090-8MA01
New Intermec 501XP 1-959001-02 98-00007 R=1200 102PHD015 Japan
New Intermec Sabre 1553e XLR Scanner NER XLR Laser Sabre 1553
New Intermec Sabre 1551 Scanner L760038 SW/HW 1.3/1.0 1551c0704
90430-67 TETRA PAK 53N012A-0005 PME-1802-A-CD2 Inmotion Technologies AB
Unit 1661 Series UFC-1661E Digital Metal Seal N2 5000 Sccm
New Microscan MS-Q Quadrus FIS-6100-0002 Scanner Barcode Reader USB
60162001-03 IRT w/2 element CIR head & aperture Brooks Automation
ASML 4022.639.92101 Lamp 4022 639 92101
Nikon AFX-II Microscope Camera Controller
Autotech Controls Mini-PLS M1450 programmable Limit Switch Single Turn PLS
Panasonic MQDB011AAD03 AC Servo Drive
Yokogawa SLPC-151*E Programmable Indicating Controller LICA-1612
Kniel CPM 117 Art Nr. 330-086-04 ASML 4022.436.72601
Nikon SMZ-1 STEREOZOOM MICROSCOPE HEAD
Fanuc IC670CHS102A I/O Base 2 Tier Box Terminal
Power One ASML 4022 476 0251 power Supply
Premium NP-0581 Power supply ASML 4022.476.01212
KEYENCE GR-3500 TEMPERATURE PROFILE front cover only for spare parts
Eyelet Flat Flange 115-7209 020" ID x .120" L Circuit technology Center Pack 100
Yokogawa 2422 Portable Calibrator 242212 1992
5 New Linear Bearing SM6GUU 840-05587
New Panasonic M8GA12.5B 0x30 Gear Head
4 New Lee Laser 120020 Indicator Red Led 14v
3 New Lee Laser 120023 Indicator Red Led 5v
3 New Lee Laser 120022 Indicator Light bulb
2 New Lee Laser 120021 Indicator Light Amber 28v
omron V600-CA5D02 ID Controller
Oyster +8p Oyster terminal pocket terminal oyster 8