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廈仲仲鑫達(dá)自動化設(shè)備有限公司
 
聯(lián)系人：陳如（銷售工程師）

電話：0592-5085329

手機(jī)：18030132586

傳真：0592-5165561(陳工）

郵箱：1151195663@qq.com

qq:1151195663

廈門市思明區(qū)湖濱東路湖光大廈8樓A座

 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)之所以給自動化市場帶來風(fēng)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(xiàn)代企業(yè)對實時生產(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)送方檢測到?jīng)_突就暫停發(fā)送，隨機(jī)延遲一段時間后再重新發(fā)送直到成功。由于延遲時間是隨機(jī)的，不能事先知道，因而共享以太網(wǎng)的時間響應(yīng)具有不確定性，不能用于強(qiáng)實時性場合。
    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，在通信的時候交換機(jī)會在發(fā)送端口與接受端口間建立一個獨(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。



American Standard WSM Circuit Board Module 6400-1065-01


Topaz P6 Gate Driver Board PCBA 09040-0305


Schneider TSX Quantum Digital Output Module 140DDO84300


Chemline Plastics Globe Valve 1" 98L00174F


Foxboro Interface Contact Module DM400YL-0G


General Electric Auxiliary Relay 12HAA13A1A


Foxboro Voltage Converter Module 2AI-N2V+SLW


ABB Input Protection Board NINP-61


Ashcroft Snap Action Temperature Switch T424T15-030


Schneider 115 VAC Output Module  140 DAO 842 10


Schlumberger Pressure Regulator 1-1/2" B38R


SNT S 1/7 Speed Reducer RMI63 / RMI 63


ABB Bailey Controls Bus Monitor 6637830A1


SNT S 1/7 Speed Reducer RI63 / RI 63


Parker Solenoid Valve H22WXBBL53A

Ashcroft Temperature Switch T432TS040 XNH


Dresser / Nil-Cor Valve Butterfly 8"-300VANE


Ace Controls Shock Absorber A 1-1/2" x 2"


GEA Tuchenhagen DL Separate Lifting Actuator and components


Bently Nevada Velocity Seismoprobe Sensor 26862-03-12


Parker Parflex Hydraulic Hose Twin 550H-12


American Standard Control circuit Board 6400-1065-01


ABB Stromberg Keyboard ULMA-KB2/A  57298821


Foxboro Spec 200 Indicator 210S-1  ST C


Square D Industrial Control Transformer 9070EL2D5


Allen-Bradley Analog Output Module 1771-OFE2/B


Penn Johnson Controls Lubrication Protection P45NCA-46


Dodge Taper Lock Bushing 3020 x 15/16 117101


ABB Optical Fiber Cable 3AU291001B14


Dodge Bearing Flange F4B-SCAH-100 or F4BSCAH100


Flex Pression SS Flexible Hose Assy 1/8" NPT x 100"


JCS PFA Lined  Reducing Filler 1-1/2" x 3/4"


Thomas & Betts Straight Fitting 5336 1-1/2" (Lot of 5)


Gould Shawmut Time Delay Fuse TRS70R (Lot of 4)


Flex Pression SS Flexible Hose Assy 1/4" x 70"


Flex Pression SS Flexible Hose Assy 1/8" NPT x 98"


Resistoflex PFA Lined Reducing Filler Flange 1"x 3/4"


SKF Seal Ring LOR 54 ( Lot of 2)


Gec Alsthom Istat 200 DC Voltage Card Used JSA51903001


Allen-Bradley Relay 700-HC14A1-4 W/Base (5)


Siemens Simatic Digital Input Module 6ES5430-4UA12 Used


Apcon Lazer Link IV ACI-2032-CLW


Kop-Flex Elastomeric Coupling 30 EHUB


Bailey PTSDDC Pressure transmitter PTSDDC122BB210B


Siemens Digital Input 6ES5 434-7LA11


Hitech Dielectric Hose SI-3024


Gould Shawmut  Tri-onic Time Delay Fuse  TRS1-8/10R (4)


Dresser / Masoneilan Plug Linear 607000-002-940


Bucher Hydraulics Beringer Power Supply NTA-1


Hydac Betamicron 3Plus Filter 0990 D 005 BH3HC


Drexelbrook Level Control Transmitter 407-6000


Magnetrol Flow Switch F50


ABB PC Board Interface 3BSE005177R1


Robco Mechanical Seal  Type 1 TC/SC Viton 4"


Weir Minerals GEHO Pump Roof-Shaped Rings  933.160.127


Morgan Kaowool Thermal Ceramic Gasket Grade 2000 22"


Aeroflex HRC Fuse HA4 350 Form 1


Fybroc Backplate 1500 6" X  8" X 13"


Larco Break Pad Kit 99-3601


SKF Bearing 2311 K


Siemens Transformer A1-106-010-001 TR-13900


General Electric Contactor Relay CR2810A 14AC


Fenwal Thermoswitch 01-018002-021


Honeywell Universal Digital Controller UDC200


ABB Synchronizing Relay Monitor Synchrotact 4


Visua Scan Printhead Kit Titan 6200


Rosemount Conductivity Microprocessor Analyzer 1054BT


Telemecanique Motor Starter Contactor LD1-LB030


Siemens Circuit Breaker JD63F400 400A


Schneider Automation Analog Output 140 ACO 020 00


Dresser Nil-Cor Butterfly Valve 8" Series 310


Triconex Terminal Board for 2652-9 7400058-390


Siemens Rectifier Stack C67117-A5306-A595


Hammond Primary Fuse Kit FK-11(lot of 4)


Dresser / Masoneilan PTFE Valve Bellows 607006-000-940


Hammond Primary Fuse Kit FK-11(lot of 4)


Dresser / Masoneilan PTFE Valve Bellows 607006-000-940


Techmo Car Brass Bushing Heavy Duty 72mm x 60mm x 60mm (lot of 2)


 Newco 1-1/2" Swing Gate Check Valve 38SFS2 / 38S-FS2


Dresser Nil-Cor Ball Valve 300 R-T-H-X 1.5"


Armstrong Y-Type Cast Iron Strainer 3" dia CA1SC


 Newco Valve Trim (for 11FCB2 10") (Lot of 2)


Carbone of America Thermowell 2TWF-26-14-.5-R10


Omron Relay Base P2CF-11 (Lot of 3)


Legris Ball Valve Double Female 0402 32 49 1-1/2"


Northtern Telecom Wireless Base Station NT0P30DA-93


Siemens 3 Phase RC Filter R15B02-327-C


Carbone of America  Thermowell 15TW-31-9.91-0.5-R5


Ashcroft Temperature Switch T424TS-040 w/ 3" Probe


Veco Cable Carrier WS1F/85 (Lot of 6)


Gates Hi-Power V-Belt B74 (Lot of 2)


Gates Tri-Power  V-Belt BX78 (Lot of 2)


General Electric Output Current Board ML471L561 GR.1


Eupec Power Block R55-01-127  (Lot of 3)


Crouse-Hinds Non-metallic Push Button Station Type N2S


Aeroflex Delay Action Fuse  HRC I-R HA6 500 New


Valmet Metso Paper Cylinder Seal Kit 2300-FD/160/-/90


Gates Tri-Power V-Belt BX46 (Lot of 2)


Goodyear HY-T Wedge V-Belt 3VX1120 (Lot of 3)


Westinghouse Control realy BFD55S 275A288G01


O-Z/Gedney Superstrut Spring Nut 1/4" (Lot of 40)


Omega Probe Handle w/ Cable SDX-UST-K-SMP-M (Lot of 2)