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一般來講，控制系統(tǒng)網(wǎng)絡(luò)可分為3層：信息層、控制層和設(shè)備層(傳感/執(zhí)行層)。傳統(tǒng)的控制系統(tǒng)在信息層大都采用以太網(wǎng)，而在控制層和設(shè)備層一般采用不同的現(xiàn)場(chǎng)總線或其他專用網(wǎng)絡(luò)。目前，以太網(wǎng)已經(jīng)滲透到了控制層和設(shè)備層，很多的PLC和遠(yuǎn)程I/O供應(yīng)商都能提供支持TCP/IP的以太網(wǎng)接口的產(chǎn)品。以太網(wǎng)之所以給自動(dòng)化市場(chǎng)帶來風(fēng)暴式的革命，主要有3個(gè)原因：低成本的刺激和速度的提高；現(xiàn)代企業(yè)對(duì)實(shí)時(shí)生產(chǎn)信息有越來越多的要求；以太網(wǎng)的開放性和兼容性。
早期的以太網(wǎng)，多節(jié)點(diǎn)共享同一個(gè)傳輸媒體，稱為共享以太網(wǎng)(Shared Ethernet)，節(jié)點(diǎn)間通信采用廣播方式，易發(fā)生沖突。共享以太網(wǎng)用CSMA/CD技術(shù)來避免沖突，即發(fā)送方檢測(cè)到?jīng)_突就暫停發(fā)送，隨機(jī)延遲一段時(shí)間后再重新發(fā)送直到成功。由于延遲時(shí)間是隨機(jī)的，不能事先知道，因而共享以太網(wǎng)的時(shí)間響應(yīng)具有不確定性，不能用于強(qiáng)實(shí)時(shí)性場(chǎng)合。
交換以太網(wǎng)(Switched Ethernet)的出現(xiàn)克服了這一缺點(diǎn)，以太網(wǎng)的交換機(jī)(Switch)是數(shù)據(jù)鏈路層(ISO/OSI參考模型第二層)的多端口網(wǎng)橋，也可以說是智能分配器。交換機(jī)將其管理的網(wǎng)絡(luò)以星型拓?fù)浣Y(jié)構(gòu)劃分為許多物理上互相隔離而邏輯上互相聯(lián)系的節(jié)點(diǎn)，每一節(jié)點(diǎn)單獨(dú)與交換機(jī)建立物理連接，在通信的時(shí)候交換機(jī)會(huì)在發(fā)送端口與接受端口間建立一個(gè)獨(dú)占的全雙工通道，它具有以太網(wǎng)的全部帶寬并避免沖突。
-SD23H2A07-E Vector Drive 230VAC 3PH R-FSF2003C-01 SD23H2A07
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 23R5661C98043-A1601-L
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
New Microscan Quadrus EZ CCD FIS-6700-0001 M02SCN045
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
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