易賣工控網(wǎng)（news.tpt0.cn）提供”DECS-200-1L數(shù)字勵磁控制系統(tǒng)DECS-200-1L備件”，產(chǎn)品詳情：品牌/廠家：BASLER ELECTRIC巴斯勒、型號：DECS-200-1L、成色：全新、貨期：現(xiàn)貨 1天內(nèi)發(fā)貨、保修：180天，更多產(chǎn)品詳情就上易賣工控網(wǎng)。

DECS-200-1L每個滑動支持軸承上配置一對X/Y方向（互為垂直安裝）的軸振測點，采用本特利3300XL系列電渦流傳感器進行測量。軸位移：壓縮機組的每個推力軸承處配置雙冗余的軸向位移測點；采用本特利3300XL系列電渦流傳感器進行測量。
 
PLC的發(fā)展歷史
1968年美國GM(通用汽車)公司提出取代繼電器控制裝置的要求，二年美國數(shù)字公司研制出了代可編程序控制器，滿足了GM公司裝配線的要求。隨著集成電路技術(shù)和計算機技術(shù)的發(fā)展，現(xiàn)在已有五代PLC產(chǎn)品了。
在以改變幾何形狀和機械性能為特征的制造工業(yè)和以物理變化和化學(xué)變化將原料轉(zhuǎn)化成產(chǎn)品為特征的過程工業(yè)中，除了以連續(xù)量為主的反饋控制外，特別在制造工業(yè)中存在了大量的開關(guān)量為主的開環(huán)的順序控制，它按照邏輯條件進行順序動作號按照時序動作;另外還有與順序、時序無關(guān)的按照邏輯關(guān)系進行連鎖保護動作的控制;以及大量的開關(guān)量、脈沖量、計時、計數(shù)器、模擬量的越限報警等狀態(tài)量為主的—離散量的數(shù)據(jù)采集監(jiān)視。由于這些控制和監(jiān)視的要求，所以PLC發(fā)展成了取代繼電器線路和進行順序控制為主的產(chǎn)品。在多年的生產(chǎn)實踐中，逐漸形成了PLC、DCS與IPC三足鼎立之勢，還有其它的單回路智能式調(diào)節(jié)器等在市場上占一定的百分比。

HP Agilent 5890-A Gas Chromatograph Lab Oven
Kepco 26248 DC Power Supply Unit 208VAC 8A Rackmount
HP Agilent 5890A Gas Chromatograph Lab Oven
Reichert-Jung 8040 Digital Tissue Embedding Center 120V
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Lot of 47 Dell PowerEdge 1850 Dual Xeon CPU/1GB RAM/PSU
ACS SpiiPlus CM-2 Motion Controller System HSSI IO16 ED
NEW Tyan Transport VX50-B4985 5U Server 4x AMD Opteron
Stryker Endoscopy Ideal Eyes HD Articulating Laparoscop.
NEW Cisco ONS-XC-10G-S1 OC192SR1
Genmark Automation Porta 300 Stand-Up 300mm Wafer Load
Amrel American Reliance FEL 300-1 Programmable Electron
Coherent Innova I-70 IonPure Plasma Tube Argon Ion Lase
CSC 4200/6210 ITC Isothermal Titration Calorimeter Ther
Behlman Engineering 3-75-AS 2.25 KVA 3PH Switching AC

Switching Characteristics of IGBT

The IGBT is a Voltage controlled device, hence it only requires a small voltage to the gate to stay in the conduction state. And since these are unidirectional devices,  they can only switch current in the forward direction which is from collector to emitter. A typical switching circuit of IGBT is shown below, the gate volt VG is applied to the gate pin to switch a motor (M) from a supply voltage V+. The resistor Rs is roughly used to limit the current through the motor.The input characterictcs of IGBT can be understood from the graph. Initially, when no voltage is applied to the gate pin the IGBT is in turn off condition and no current flows through the collector pin. When the voltage applied to the gate pin exceeds the threshold voltage, the IGBT starts conducting and the collector current IG starts to flow between the collector and emitter terminals. The collector current increases with respect to the gate voltage as shown in the graph The output characteristics of IGBT have three stages, initially, when the Gate Voltage VGE is zero the device is in the off state, this is called the cutoff region. When VGE is increased and if it is less than the threshold voltage then there will be a small leakage current flowing through the device, but the device will still be in the cutoff region. When the VGE is increased beyond the threshold voltage the device goes into the active region and the current starts flowing through the device. The flow of current will increases with an increase in the voltage VGE as shown in the graph above.IGBTs are used in various applications such as AC and DC motor drives, Unregulated Power Supply (UPS), Switch Mode Power Supplies (SMPS), traction motor control and induction heating, inverters, used to combine an isolated-gate FET for the control input and a bipolar power transistor as a switch in a single device, etc.GBTs are available in different kinds of packages with different names from different companies. For example, Infineon Technologies offer Thru-Hole type and Surface mount packages. The Thru-hole type package includes TO-262, TO-251, TO-273, TO-274, TO-220, TO-220-3 FP, TO-247, TO-247AD. The surface-mount package includes TO-263, TO-252.