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現(xiàn)貨 進口全新原裝
廈仲岳航計算機工程有限公司
聯(lián)系人：陳如（銷售工程師）
電話：0592-5085329
手機：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)點共享同一個傳輸媒體，稱為共享以太網(wǎng)(Shared Ethernet)，節(jié)點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，不能用于強實時性場合。
交換以太網(wǎng)(Switched Ethernet)的出現(xiàn)克服了這一缺點，以太網(wǎng)的交換機(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。交換機將其管理的網(wǎng)絡(luò)以星型拓撲結(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，每一節(jié)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(fā)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(wǎng)的全部帶寬并避免沖突。
ASCO 304691 Solenoid Valve Repair Kit
Goyen 4B6M-LUBNA-6C81 General Purpose Valve for Hazardous Locations
Numatics 123RS115JP Solenoid Valve Assembly
Numatics 226-749B Solenoid Valve
Leitungsdose GDM 2011 HN Solenoid Plug
Vickers CS 03 C 50 Relief Valve
Vickers Control Valve Assembly
Vickers PA5DG4S4L W 012C WB 50 Directional Pilot Valve
Vickers OFP 15 S E 20 Valve
ASCO 8210G73 Solenoid Valve
Vickers DF10P1-24-5-20 Directional Valve
Numatics 229-686 Blank Station Plate
Maxon 1.25" 5000 0 Shut-Off Valve 0889-0A18
Maxon 0.75" 5000 1 Shut-Off Valve 0889-OAOW
ASCO 8314G23 Solenoid Valve
MAC 180003-112-0001 Solenoid Valve
Syraco Painted Black Enamel Durable Cast Iron Gate Faucet Valve 1"
Brooks 8902 Flow Controller
Cimtrol 181692-G Directional Valve with Decco 11-410 Solenoid
Little Giant Pump Co. CV-2 599061 Check Valve
Goyen RCA40T Viton Diaphragm Valve Repair Kit
Numatics 229-487 Flow Control Kit
Numatics 229-686 Assembly Plate Repair Kit
Sperry Vickers CG-03-C-10 High Pressure Relief Valve
Syraco Painted Black Enamel Durable Cast Iron Gate Faucet Valve 2"
Durair II AP063 N Duravalve Pneumatic Ball Valve
Vickers 02-136810 Coupling Kit
Numatics VT30N06Y SLO-START Lockout Valve
Hayward BF10075SXT 3/4" PVC Bulkhead Fitting
Numatics Solenoid Valve Assembly with FlexiBlok Base
Ross 1523 C 4002 L-O-X LockOut and eXhaust Valve
Deltrol EF20B Check Valve
Herion 99-331-40 Valve
ASCO 172-827 Solenoid Valve Spare Part Kit (3 Incomplete Kits)
ASCO 68-402 Solenoid Valve Spare Part Kit
MAC 922B-PM-111JB Solenoid Valve
ITT Conoflow 22-15A Positioner Actuator Model J
MAC B11C-PM-111JD-175 Solenoid Valve
OMNI 250-03-011-03 Air Valve
Hoffman Specialty 401617 Float and Thermostatic Trap
ASCO 8262B208 Solenoid Valve
Ross DOTS 2771B2001 Single Solenoid Pilot
Vickers DG4V3 6C UB40 Directional Control Solenoid Valve
Vickers DG4S-5-6C-MW2-H-10 Hydraulic Solenoid Valve
Vickers CG2V 6GW 10 Valve
Vickers DG4V3 2C UB40 Directional Control Solenoid Valve
Vickers DG4V-3-2N M U B 7 30 Directional Control Solenoid Valve
Bosch 0 821 300 907 Distributor
Numatics I12RS100OP56H00 Valve
KMC Controls CEP-4015 VAV Flow Controller-Actuator
GP:50 311-B-PZ-2 Pressure Transducer 0-100 PSI (Fitting Attached)
GP:50 311-B-PZ-2 Pressure Transducer 0-100 PSI
Colonial Valve V17191N 1-1/2" Super "C" Compact Valve
Bosch 0 820 018 628 Solenoid Valve
Taco 524-400-2100 Solenoid Valve
Taco 524-400-1100 Solenoid Valve
ACSO L-YAB3A2 Valve Position Indicator
ASCO Brass Valve with offset Coil NNB
ASCO Brass Valve Pipe Size 3/4"NNB
ASCO Brass Valve Small no Coil Pipe Size 3/8" NNB
Camozzi 138-955TF Valve
Ross 2771B2001 Valve 110/120V 1-10 bar
Chem-Tec LPH-375-SC/2987 Flow Switch
JOY 00527701 0004 Valve
Hyster 57812 Seal
Watts U5B 5M2 Water Pressure Reducing Valve
IFM Efector ST3614 Flow Monitor
Skinner A5LB2127 Solenoid Valve
MAC 82A-AC-CAA-TM-DAAP-2DA Solenoid Valve
C22.8 Valve
MAC 811C-PM-614-JC-152 Solenoid Valve
MAC 56B-83 Air Valve
MAC 56C-52 Air Valve
MAC 56B-82 Air Valve
Bellows B511-2005 Solenoid Valve
MAC Valves Inc. 23881-05-06 Cable 6 Feet
Canfield W1117 Connector 22/3 E24546
MAC 811C-PM-111DA-142 Solenoid Valve Used
Alkon 21876 Flow Control
7020-AA Automatic Valve
IP 65 Solenoid Valve
ASCO Red Hat 8264D10 Solenoid Valve
Hyster 1198292 Valve Seat
Honeywell MP909 B 1049 2 Pneumatic Actuator
AMSCO P030397-091 Diaphram Assembly
Allenair Corp. VSA-3/8 Solenoid Valve
ACE Pneumatic Air Muffler
Schrader Bellows K0651043 Air Solenoid Control Valve
Parker X00917 RSF Strainer
JORC 600WOG Valve
Gre-Con Fire Systems 8493511 82754 Valve
Air System Products AD3001 Sure Drain Valve
Yarway Corp. 965064-07 Seatless Blow-Off Valve Used
Hills-McCanna 10 Diaphragm Valve
Hills-McCanna J5 Diaphragm Valve
Vogt B16.34 Valve
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