名稱:PLC基礎知識
1、PLC的基本概念
可編程控制器(Programmable Controller)是計算機家族中的一員，是為工業(yè)控制應用而設計制造的。早期的可編程控制器稱作可編程邏輯控制器(Programmable Logic Controller)，簡稱PLC，它主要用來代替繼電器實現(xiàn)邏輯控制。隨著技術(shù)的發(fā)展，這種裝置的功能已經(jīng)大大超過了邏輯控制的范圍，因此，今天這種裝置稱作可編程控制器，簡稱PC。但是為了避免與個人計算機(Personal Computer)的簡稱混淆，所以將可編程控制器簡稱PLC2、PLC的基本結(jié)構(gòu)PLC實質(zhì)是一種于工業(yè)控制的計算機，其硬件結(jié)構(gòu)基本上與微型計算機相同．A.*處理單元(CPU)*處理單元(CPU)是PLC的控制中樞。它按照PLC系統(tǒng)程序賦予的功能接收并存儲從編程器鍵入的用戶程序和數(shù)據(jù)；檢查電源、存儲器、I/O以及警戒定時器的狀態(tài)，并能診斷用戶程序中的語法錯誤。當PLC投入運行時，首先它以掃描的方式接收現(xiàn)場各輸入裝置的狀態(tài)和數(shù)據(jù)，并分別存入I/O映象區(qū)，然后從用戶程序存儲器中逐條讀取用戶程序，經(jīng)過命令解釋后按指令的規(guī)定執(zhí)行邏輯或算數(shù)運算的結(jié)果送入I/O映象區(qū)或數(shù)據(jù)寄存器內(nèi)。等所有的用戶程序執(zhí)行完畢之后，zui后將I/O映象區(qū)的各輸出狀態(tài)或輸出寄存器內(nèi)的數(shù)據(jù)傳送到相應的輸出裝置，如此循環(huán)運行，直到停止運行。
為了進一步提高PLC的可*性，近年來對大型PLC還采用雙CPU構(gòu)成冗余系統(tǒng)，或采用三CPU的表決式系統(tǒng)。這樣，即使某個CPU出現(xiàn)故障，整個系統(tǒng)仍能正常運行。
B、存儲器
存放系統(tǒng)軟件的存儲器稱為系統(tǒng)程序存儲器。
存放應用軟件的存儲器稱為用戶程序存儲器。
C、電源
PLC的電源在整個系統(tǒng)中起著十分重要得作用。如果沒有一個良好的、可*得電源系統(tǒng)是無法正常工作的，因此PLC的制造商對電源的設計和制造也十分重視。一般交流電壓波動在+10%(+15%)范圍內(nèi)，可以不采取其它措施而將PLC直接連接到交流電網(wǎng)上去。
3、PLC的工作原理
一。掃描技術(shù)
當PLC投入運行后，其工作過程一般分為三個階段，即輸入采樣、用戶程序執(zhí)行和輸出刷新三個階段。完成上述三個階段稱作一個掃描周期。在整個運行期間，PLC的CPU以一定的掃描速度重復執(zhí)行上述三個階段。
(一)輸入采樣階段
在輸入采樣階段，PLC以掃描方式依次地讀入所有輸入狀態(tài)和數(shù)據(jù)，并將它們存入I/O映象區(qū)中的相應得單元內(nèi)。輸入采樣結(jié)束后，轉(zhuǎn)入用戶程序執(zhí)行和輸出刷新階段。在這兩個階段中，即使輸入狀態(tài)和數(shù)據(jù)發(fā)生變化，I/O映象區(qū)中的相應單元的狀態(tài)和數(shù)據(jù)也不會改變。因此，如果輸入是脈沖信號，則該脈沖信號的寬度必須大于一個掃描周期，才能保證在任何情況下，該輸入均能被讀入。
(二)用戶程序執(zhí)行階段
在用戶程序執(zhí)行階段，PLC總是按由上而下的順序依次地掃描用戶程序(梯形圖)。在掃描每一條梯形圖時，又總是先掃描梯形圖左邊的由各觸點構(gòu)成的控制線路，并按先左后右、先上后下的順序?qū)τ捎|點構(gòu)成的控制線路進行邏輯運算，然后根據(jù)邏輯運算的結(jié)果，刷新該邏輯線圈在系統(tǒng)RAM存儲區(qū)中對應位的狀態(tài)；或者刷新該輸出線圈在I/O映象區(qū)中對應位的狀態(tài)；或者確定是否要執(zhí)行該梯形圖所規(guī)定的特殊功能指令。
即，在用戶程序執(zhí)行過程中，只有輸入點在I/O映象區(qū)內(nèi)的狀態(tài)和數(shù)據(jù)不會發(fā)生變化，而其他輸出點和軟設備在I/O映象區(qū)或系統(tǒng)RAM存儲區(qū)內(nèi)的狀態(tài)和數(shù)據(jù)都有可能發(fā)生變化，而且排在上面的梯形圖，其程序執(zhí)行結(jié)果會對排在下面的凡是用到這些線圈或數(shù)據(jù)的梯形圖起作用；相反，排在下面的梯形圖，其被刷新的邏輯線圈的狀態(tài)或數(shù)據(jù)只能到下一個掃描周期才能對排在其上面的程序起作用。
(三)輸出刷新階段
當掃描用戶程序結(jié)束后，PLC就進入輸出刷新階段。在此期間，CPU按照I/O映象區(qū)內(nèi)對應的狀態(tài)和數(shù)據(jù)刷新所有的輸出鎖存電路，再經(jīng)輸出電路驅(qū)動相應的外設。這時，才是PLC的真正輸出。
同樣的若干條梯形圖，其排列次序不同，執(zhí)行的結(jié)果也不同。另外，采用掃描用戶程序的運行結(jié)果與繼電器控制裝置的硬邏輯并行運行的結(jié)果有所區(qū)別。當然，如果掃描周期所占用的時間對整個運行來說可以忽略，那么二者之間就沒有什么區(qū)別了。
一般來說，PLC的掃描周期包括自診斷、通訊等，如下圖所示，即一個掃描周期等于自診斷、通訊、輸入采樣、用戶程序執(zhí)行、輸出刷新等所有時間的總和。
二。 PLC的I/O響應時間
為了增強PLC的抗*力，提高其可*性，PLC的每個開關(guān)量輸入端都采用光電隔離等技術(shù)。
為了能實現(xiàn)繼電器控制線路的硬邏輯并行控制，PLC采用了不同于一般微型計算機的運行方式(掃描技術(shù))。
以上兩個主要原因，使得PLC得I/O響應比一般微型計算機構(gòu)成的工業(yè)控制系統(tǒng)滿的多，其響應時間至少等于一個掃描周期，一般均大于一個掃描周期甚至更長。
所謂I/O響應時間指從PLC的某一輸入信號變化開始到系統(tǒng)有關(guān)輸出端信號的改變所需的時間。其zui短的I/O響應時間與zui長的I/O響應時間．
第(N-1)個
掃描周期
zui短I/O響應時間：
zui長I/O響應時間
西門子PLC基礎2
SIEMENS PLC在中國的產(chǎn)品，根據(jù)規(guī)模和性能的大小，主要有 S7-200 S7-300和S7-400三種，下面就簡單介紹一下該三種產(chǎn)品的一些特性。
S7-200
針對低性能要求的摸塊化小控制系統(tǒng)，它zui多可有7個模塊的擴展能力，在模塊中集成背板總線，它的網(wǎng)絡聯(lián)接有RS-485通訊接口和PROFIBUS兩種，可通過編程器PG訪問所有模塊，帶有電源、CPU和I/O的一體化單元設備。
其中的擴展模塊（EM）有以下幾種：數(shù)字量輸入模塊（DI）——24VDC和 120/230VAC；數(shù)字量輸出（DO）——24VDC和繼電器；模擬量輸入模塊（AI）——電壓、電流、電阻和熱電偶；模擬量輸出模塊——電壓和電流。還有一個比較特殊的模塊-通訊處理器（CP）——該塊的功能是可以把S7-200作為主站連接到AS-接口（傳感器和執(zhí)行器接口），通過AS-接口的從站可以控制多達248個設備，這樣就可以顯著的擴展S7-200的輸入和輸出點數(shù)。
CPU設計
有3種手動選擇操作模式：STOP——停機模式，不執(zhí)行程序；TERM——運行程序，可以通過編程器進行讀/寫訪問；RUN——運行程序，通過編程器僅能進行讀操作。
狀態(tài)指示器（LED）：SF——系統(tǒng)錯誤或（和）CPU內(nèi)部錯誤；RUN——運行模式，綠燈；STOP——停機模式，黃燈；DP——分布式I/O（僅對CPU-215）。
存儲器卡——用來在沒電的情況下不需要電池就可以保存用戶程序。PPI口用來連接編程設備、文本顯示器或其他CPU。
S7-300
相比較S7-200，S7-300針對的是中小系統(tǒng)，他的模塊可以擴展多達32個模塊，背板總線也在模塊內(nèi)集成，它的網(wǎng)絡連接已比較成熟和流行，有MPI（多點接口）、PROFIBUS和工業(yè)以太網(wǎng)，使通訊和編程變的簡單和多選性，并可以借助于HWConfig工具可以進行組態(tài)和設置參數(shù)。
S7-300的模塊稍微多一點，除了信號模塊（SM）和200的EM模塊同類型之外，它還有接口模塊（IM）——用來進行多層組態(tài)，把總線從一層傳到另一層；占位模塊（DM）——為沒有設置參數(shù)的信號模塊保留一個插槽或為以后安裝的接口模塊保留一個插槽；功能模塊（FM）——執(zhí)行特殊功能，如計數(shù)、定位、閉環(huán)控制相當于對CPU功能的一個擴展或補充；通訊處理器（CP）——提供點對點連接、PROFIBUS和工業(yè)以太網(wǎng)。
CPU設計
模式選擇器有：MRES=模塊復位功能；STOP=停止模式，程序不執(zhí)行；RUN=程序執(zhí)行，編程器只讀操作；RUN-P=程序執(zhí)行，編程器可讀寫操作。
狀態(tài)指示器：SF，BATF=電池故障；DC5V=內(nèi)部5 V DC電壓指示；FRCE=表示至少有一個輸入或輸出被強制；RUN=當CPU啟動時閃爍，在運行模式下常亮；STOP=在停止模式下常亮，有存儲器復位請求時慢速閃爍，正在執(zhí)行復位時快速閃爍。
MPI接口用來連接到編程設備或其他設備，DP接口用來直接連接到分布式I/O。
S7-400
同300的區(qū)別主要是規(guī)模和性能上更強大，啟動類型有冷啟動（CRST）和熱啟動（WRST）之分，其他基本一樣。哦，它還有一個外部的電池電源接口，當在線更換電池時可以向RAM提供后備電源。
編程設備
編程設備主要有PG720 PG740 PG760——可以理解成裝有編程軟件的手提電腦；也可以直接用安裝有STEP7（SIEMENS的編程軟件）的PC來完成。而實現(xiàn)通訊（要編程首先要和PLC的CPU通訊上）的要求主要在于接口：1.可以在PC上裝CP5611卡——上面有MPI口，可用電纜直接連接。2.加個PC適配器，把MPI口轉(zhuǎn)換成RS-232口后接到PC上。3.PLC加CP343卡，使它具有以太網(wǎng)口。

本公司主營產(chǎn)品：
DCS集散式控制系統(tǒng)、PLC可編程控制器、數(shù)控系統(tǒng)、
(CPU處理器、模塊、卡件、控制器、伺服驅(qū)動、工作站、驅(qū)動器、
馬達、 內(nèi)存卡、 電源，機器人備件等)各類工控產(chǎn)品

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◆ 主營業(yè)務：DCS,PLC

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WS-X6K-S2U-MSF?C2 CATALYST 6500 SUPERVISOR 2U 256MB SUPERVISOR 512MB MSFC2
WS-X6816-GBIC CISCO CAT 6500 16-PORT GIGE MODULE
WS-X6816-GBIC CISCO CAT 6500 16-PORT GIGE MODULE
WS-X6748-GE-TX Cisco Express Forwarding 720 Interface Module Switch 48 ports -
WS-X6748-GE-TX Cisco Express Forwarding 720 Interface Module Switch 48 ports -
WS-X6748-GE-TX Cisco Exp. Forw.720 Interface Module Switch 48 ports ma
WS-X6748-GE-TX Cisco Exp. Forw.720 Interface Module Switch 48 ports ma
WS-X6724-SFP CISCO Gigabit Interface Module 6500/7600 24 ports
WS-X6708-10G-3?C Cisco 8-Port 10 Gigabit EN Module with DFC3C module 8 ports
WS-X6708-10G-3?C Cisco 8-Port 10 Gigabit EN Module with DFC3C module 8 ports
WS-X6708-10G-3?C Cisco 8-Port 10 Gigabit EN Module with DFC3C module 8 po
WS-X6708-10G-3?C Cisco 8-Port 10 Gigabit EN Module with DFC3C module 8 po
WS-X6704-10GE Cisco 6500 10 Gigabit EN Interface Module 4 ports
WS-X6704-10GE Cisco 6500 10 Gigabit EN Interface Module 4 ports
WS-X6704-10GE Cisco 6500 10 Gigabit EN Interface Module 4 ports
WS-X6704-10GE Cisco 6500 10 Gigabit EN Interface Module 4 ports
WS-X6548-GE-TX Cisco Switching Module  FREE 1 YEAR 
WS-X6516-GE-TX CATALYST 6500 16-PORT GIG/COPPER MODULE X-BAR
WS-X6502-10GE CISCO 6500 10 GIGABIT ETHERNET BASE MODUL
WS-X6502-10GE CISCO 6500 10 GIGABIT ETHERNET BASE MODUL
WS-X6148-GE-TX Cisco Classic Interface Module Expansion module 48 ports
WS-X6148-GE-TX Cisco Classic Interface Module Expansion module 48 ports
WS-X6148A-GE-T?X Cisco Classic Interface Module Expansion module 48 ports Switch
WS-X6148A-GE-4?5AF CISCO 6500 SWITCH MODULE 48 Ports POE 802.3AF
WS-X4904-10GE Cisco 4-Port 10 Gigabit Ethernet X2 Expansion Module
WS-X4904-10GE Cisco 4-Port 10 Gigabit Ethernet X2 Expansion Module
WS-X4712-SFPE Cisco Catalyst 4500 E-Series 12Pt.-10GBE SFP MODULE
WS-X4712-SFPE Cisco Catalyst 4500 E-Series 12Pt.-10GBE SFP MODULE
WS-X4648-RJ45V?-E Cisco Catalyst 4500E Series Line Card Switch 48 ports
WS-X4648-RJ45V?-E Cisco Catalyst 4500E Series Line Card Switch 48 ports
WS-X4648-RJ45V?E Cisco 48-Port PoE Line Card 48 x 10/100/1000Bas?e-T LAN
WS-X4648-RJ45-?E CISCO Catalyst 4500E Series Line Card Switch 48 ports
WS-X4648-RJ45-?E CISCO Catalyst 4500E Series Line Card Switch 48 ports
WS-X4648-RJ45-?E CATALYST 4500 E-SERIES 48-PORT 10/100/1000 RJ45
WS-X4648-RJ45-?E CATALYST 4500 E-SERIES 48-PORT 10/100/1000 RJ45
WS-X4624-SFP-E Cisco Line Card E-Series Expansion module 24 ports
WS-X4624-SFP-E CATALYST 4500 E-SERIES 24-PORT GE SFP
WS-X4624-SFP-E CATALYST 4500 E-SERIES 24-PORT GE SFP
WS-X4624-SFP-E 2YR  ServerPartsCan?ada.com
WS-X45-SUP6L-E Cisco Supervisor Engine 6L-E Control processor
WS-X45-SUP6L-E Cisco Supervisor Engine 6L-E Control processor
WS-X45-SUP6-E Cisco Supervisor Engine 6-E Control processor  1YR WARRAN
WS-X45-SUP6-E Cisco Supervisor Engine 6-E Control processor  1YR WARRAN
WS-X45-SUP6-E Cisco Supervisor Engine 6-E Control processor
WS-X4516 Cisco Supervisor Engine V 4516 Control processor
WS-X4516 Cisco Supervisor Engine V 4516 Control processor
WS-X4515 CISCO CATALYST 4500 SUPERVISOR IV ENGINE W/2 GE
WS-X4448-GB-SF?P CISCO CATALYST 4500 48-PORT 1000BASE-X
WS-X4148-RJ21 CATALYST 4500 10/100 MODULE 48-PORTS CO 4XRJ21
WS-SVC-WISM-1-?K9 CISCO Wireless Service Module WiSM for up to 300 Lightweight 
WS-SVC-SSL-1-K?9 CISCO SSL MODULE FOR CATALYST 6500
WS-SVC-FWM-1-K?9 Cisco Firewall Service Module Security appliance
WS-SVC-FWM-1-K?9 Cisco Firewall Service Module Security appliance
WS-SVC-CMM-6T1? 6-PORT T1 INTERFACE PORT ADAPTER
WS-SVC-CMM-6E1? 6-PORT E1 INTERFACE PORT ADAPTER 1YR - ASK 4 QTY
WS-SVC-CMM-6E1? 6-PORT E1 INTERFACE PORT ADAPTER 1YR - ASK 4 QTY
WS-SUP720-3BXL Cisco Supervisor Engine 720-3BXL Control processor
WS-SUP720-3BXL Cisco Supervisor Engine 720-3BXL Control processor
WS-SUP720-3BXL Cisco Supervisor Engine 720-3BXL Control processor
WS-SUP720-3BXL  WS-X6716-10G-3?CXL CiscoDeal
WS-SUP720-3BXL  WS-X6716-10G-3?CXL CiscoDeal
WS-SUP720-3BXL  1 WS-X6708-10G-3?C Super Cisco Bundle
WS-SUP720-3BXL  1 WS-X6708-10G-3?C Super Cisco Bundle
WS-SUP720-3B Cisco Supervisor Engine 720 with PFC3B Control processor
WS-SUP720-3B Cisco Supervisor Engine 720 with PFC3B Control processor
WS-SUP720 Cisco Supervisor Engine 720 Control processor
WS-SUP720 Cisco Supervisor Engine 720 Control processor
WS-G5487 GENUINE CISCO 1000BASE-ZX EXTENDED REACH GBIC S.MODE
WS-G5486 LL GBIC FOR CISCO 1000BASE-LX/LH LONG HAUL S.MODE OR M.MODE
WS-G5486 CISCO 1000BASE-LX/LH LONG HAUL GBIC SINGLEMODE OR MULTIMODE
WS-F6K-PFC3B CATALYST 6500 SUP720 POLICY F. CARD-3B 1YR - ASK 4 QTY
WS-F6K-MSFC2 CATALYST 6000 MULTILAYER SWITCH FEATURE CARD MSFCII SPARE
WS-F6K-DFC3A DIST FWD CARD-3A FOR 65XX 6816 MODULES  WITH SUP720
WS-F6K-DFC3A DIST FWD CARD-3A FOR 65XX 6816 MODULES  WITH SUP720
WS-F6700-DFC3C Cisco Distributed Forwarding Card 3C Switching accelerator
WS-F6700-DFC3C Cisco Distributed Forwarding Card 3C Switching accelerator
WS-F6700-DFC3B?XL Cisco Distributed Forwarding Card 3BXL Switching accelerator
WS-F6700-DFC3B?XL Cisco Distributed Forwarding Card 3BXL Switching accelerator
WS-F6700-DFC3B? Cisco Distributed Forwarding Card 3B Switching accelerator
WS-CE500G-12TC Cisco Catalyst Express 500G-12TC Ethernet Switch
WS-CDC-2500W CATALYST 6500/7600 2500W DC POWER SUPPLY
WS-CDC-2500W CATALYST 6500/7600 2500W DC POWER SUPPLY
WS-CDC-1300W CATALYST 6500 1300W DC POWER SUPPLY
WS-C6509-E SUP720-3BXL X6724-SFP X6748 6509
WS-C6509-E SUP720-3BXL X6724-SFP X6748 6509
WS-C6509-E CATALYST ENHANCED 6509 CHASSIS 9 15RU
WS-C6509-E CATALYST ENHANCED 6509 CHASSIS 9 15RU
WS-C6509 CISCO CAT 6509 CHASSIS 9 15RU
WS-C6506-E-FAN CATALYST 6506-E CHASSIS FAN TRAY
WS-C6506-E CATALYST 6506 ENHANCED CHASSIS 6 12RU
WS-C6506-E CATALYST 6506 ENHANCED CHASSIS 6 12RU
WS-C6506 CISCO CAT 6506 CHASSIS 6 12RU W/1300W AC PS
WS-C6503-E ENHANCED CISCO CAT 6503 CHASSIS 3 4RU 
WS-C6503-E ENHANCED CISCO CAT 6503 CHASSIS 3 4RU 
WS-C6503 CISCO CAT 6503 CHASSIS 3 4RU 
WS-C6503 CISCO CAT 6503 CHASSIS 3 4RU 
WS-C4507R CATALYST 4500 CHASSIS 7- 
WS-C4506-E CISCO 
WS-C4506-E CISCO 
WS-C3750G-48TS?-S CISCO 3750G-48TS SWICTH W/1 YR -WSC3?750G48TSS
WS-C3750G-48TS?-S CISCO 3750G-48TS SWICTH W/1 YR -WSC3?750G48TSS
WS-C3750G-16TD?-S  FREE 1 YEAR - CATALYST 3750G SWITCH
WS-C3750G-16TD?-S  FREE 1 YEAR - CATALYST 3750G SWITCH
WS-C3750-24P-A?P50 CISCO WS-C3750-24PS-?S AND AIR-WLC-4402-5?0 BUNDLE
WS-C3560V2-24T?S-SD  FREE 1 YEAR  CISCO 3560V2 SWITCH
WS-C3560V2-24T?S-SD  FREE 1 YEAR  CISCO 3560V2 SWITCH
WS-C3560E-48TD?-SD  FREE 1 YEAR -3560E CISCO SWITCH
WS-C3560E-48TD?-SD  FREE 1 YEAR -3560E CISCO SWITCH
WS-C3560E-48PD?-SF  FREE 1 YEAR  CISCO WSC3560E48PDSF
WS-C3560E-48PD?-SF  FREE 1 YEAR  CISCO WSC3560E48PDSF
WS-C3560-48PS-?S CISCO 3560-48PS SWICTH W/1 YR -WSC3?56048PSS Fast Shipp
WS-C3560-24TS-?S Cisco Cat 3560 SWITCH 24 10/100  2 SFP SLOTS
WS-C3550-24PWR?-SMI CISCO CAT SWITCH 24-10/100 INLINE POWER  2 GBIC PORTS: SMI
WS-C3550-24-DC?-SMI CISCO 3550 SWITCH 24-10/100  2 GBIC PORTSDC-PWRD?: SMI
WS-C3550-24-DC?-SMI CISCO 3550 SWITCH 24-10/100  2 GBIC PORTSDC-PWRD?: SMI
WS-C3550-12T CISCO SWITCH 10-10/100/1000 PORTS  2 GBIC PORTS: EMI
WS-C3550-12T CISCO SWITCH 10-10/100/1000 PORTS  2 GBIC PORTS: EMI
WS-C3550-12G CISCO SWITCH 10 GBIC PORTS  2-10/100/1000 PORTS: EMI
WS-C2970G-24TS?-E CISCO Switch w/1year  -WSC2970G24TS?E 2970G24TSE
WS-C2970G-24TS?-E CISCO Switch w/1year  -WSC2970G24TS?E 2970G24TSE
WS-C2960S-24TS?-L CISCO 2960S-24TS SWICTH W/1 YR -WSC2?960S24TSL Fast Sh
WS-C2960S-24TS?-L CISCO 2960S-24TS SWICTH W/1 YR -WSC2?960S24TSL Fast Sh
WS-C2960-48TC-?S CISCO CATALYST 2960-48TC SWITCH-1YEAR - GRADE A Fast Shi
WS-C2960-48TC-?S CISCO CATALYST 2960-48TC SWITCH-1YEAR - GRADE A Fast Shi
WS-C2960-24TC-?S CISCO 2960-24TC SWITCH- W/1YR - WSC296024TCS Fast 
WS-C2960-24TC-?S CISCO 2960-24TC SWITCH- W/1YR - WSC296024TCS Fast 
WS-C2960-24TC-?S CISCO 2960-24TC SWITCH- W/1YR - WSC296024TCS Fast 
WS-C2960-24TC-?S CISCO 2960-24TC SWITCH- W/1YR - WSC296024TCS Fast 
WS-C2960-24-S Cisco Catalyst 2960-24-S Switch 24 ports managed
WS-C2960-24LT-?L Cisco Catalyst 2960 Switch 24 ports managed
WS-C2960-24LT-?L Cisco Catalyst 2960 Switch 24 ports managed
WS-C2955C-12 Cisco Catalyst 2955C-12 Ethernet Switch 12TX W/MM UPLINKS
WS-C2955C-12 Cisco Catalyst 2955C-12 Ethernet Switch 12TX W/MM UPLINKS
WS-C2955C-12 Cisco Catalyst 2955C-12 Ethernet Switch 12TX W/MM UPLINKS
WS-C2955C-12 Cisco Catalyst 2955C-12 Ethernet Switch 12TX W/MM UPLINKS
WS-C2950T-48-S?I CISCO CAT. SWITCH 48 10/100  2 10/100/1000BAS?E-T UPLINKS STD I
WS-C2950G-48-E?I CISCO CAT. SWITCH 2950 48 10/100 WITH 2 GBIC SLOTS
WS-C2950G-24-E?I-DC CISCO SWITCH 24 10/100  2 GBIC SLOTS DC VERSION
WS-C2940-8TT-S 8 10/100 ETHERNET PORTS AND 1 10/100/1000 ETHERNET PORT
WOODWARD NETCON 5000 5466-315 REV C ANALOG I/O MODULE
WOODWARD NETCON 5000 5466-258 REV E DISCRETE I/O MODULE
WOODWARD NETCON 5000 5466-031 REV D I/O CONTROLLER 
Woodward Governor 5466-258 Module Discrete I/O NIP 8097
Woodhead SST-PFB-CLX PROFIBUS Scanner for ControlLogix READ 
Woodhead SST-PFB-CLX PROFIBUS Scanner for Allen-Bradley 
Woodhead SST SST-PFB-SLC ProfiBus Scanner for Allen Bradley SLC500
Woodhead SST SST-PFB-PLC5 ProfiBus Coprocessor for Allen Bradley PLC5
Woodhead SST SST-PFB-PLC5 ProfiBus Coprocessor for Allen Bradley PLC5
Woodhead SST Allen Bradley 5136-SD-ISA DH/DH/RIO ISA Interface Card
WMD PDO PHASE DISPLACEMENT OSCILLATOR MODULAR EURORACK MODULE
With GBICs
WITH 3 YEARS HP ON-SITE . Win7.WEBCAM.DVDRW
WITH 3 YEARS HP ON-SITE . Win7.WEBCAM.DVDRW
Wireless WiFi 802.11 Eight8 Channel Relay Module Board: Web TCP/IP VB6 BCB6
Wireless Eight 8 Channel Relay Module Board Virtual Com Port Controlled
WiredWIFIIndoorAudioSDRemote RecordiPhoneiPad
WIPOTEC CAN-I/O-16 USPP CANIO16
WILLIAMSON 6220LT TEMPERATURE CONTROLLER 115VAC 65-200C
WIFI H.264 SONY CCD 27X PTZ IP Security Camera Wireless 
WIC-2A/S CISCO 2-PORT ASYNC/SYNC SERIAL WAN INTERFACE CARD
WIC-1T CISCO 1-PORT SERIAL WAN INTERFACE CARD
White Box Robotics 914 PC-BOT Development Platform He-Robot/Heath?kit 
Whirlwind DS168T/R Digital Snake System16X8
WHEDCO 78005778 USPP 78005778
WESTINGHOUSE PC-1250-1042 USPP PC12501042
Westinghouse NL-542 NL542 6ES54648ME11 Analog Input
WESTINGHOUSE 1505D39G01W0 USPP 1505D39G01W0
WeatherHawk 916 Wireless Weather Station
WE SHIP SAME  WS-X45-SUP7-E CISCO  1YR  
WE SHIP SAME  WS-X45-SUP7-E CISCO  1YR  
WE SHIP SAME  WS-CAC-6000W CATALYST 6500 6000W AC POWER SUPPLY ..
WE SHIP SAME  WS-CAC-4000W 4000 WATT AC POWER SUPPLY FOR US CABLE ATTACHED
WE SHIP SAME  WS-CAC-4000W 4000 WATT AC POWER SUPPLY FOR US CABLE ATTACHED
WE SHIP SAME  WS-CAC-3000W CISCO CAT. 6500 SER. 3000W AC POWER SUPPLY
WE SHIP SAME  WS-C3750X-48T-?S CISCO 3750X-48T SWICTH W/1 YR -
WE SHIP SAME  WS-C3750G-24TS?-E CISCO 3750G-24TS SWICTH 1 YR  
WE SHIP SAME  WS-C3750G-24TS?-E CISCO 3750G-24TS SWICTH 1 YR  
WE SHIP SAME  SLM2048PT CISCO 50PORT GIGABIT POE SMART SWITCH SG200-50P
WE SHIP SAME  SLM2048PT CISCO 50PORT GIGABIT POE SMART SWITCH SG200-50P
WE SHIP SAME  SLM2024PT CISCO 26PORT GIGABIT POE SMART SWITCH SG200-2
WE SHIP SAME  SLM2024PT CISCO 26PORT GIGABIT POE SMART SWITCH SG200-2
WE SHIP SAME  PVDM2-32 CISCO 32-channel Packet /Voice DSP Module
WE SHIP SAME  PVDM2-32 CISCO 32-channel Packet /Voice DSP Module
WE SHIP SAME  HWIC-1FE?Cisco 1-Port Fast Ethernet High-Speed WAN Inter
WE SHIP SAME  HWIC-1DSU-T1 CISCO Interface Card- 
WE SHIP SAME  HWIC-1DSU-T1 CISCO Interface Card- 
WE SHIP SAME  GLC-SX-MM SX GE SFP LC CONNECTOR SX TRANSCEIVER CISCO GENUI
WE SHIP SAME  F/S VIC3-4FXS/DID CISCO 4 Port Voice Interface Card
WE SHIP SAME  CISCO1941W-A/K?9 1941 ROUTER W/ 802.11 A/B/G/N FCC COMP
WE SHIP SAME  CISCO1941W-A/K?9 1941 ROUTER W/ 802.11 A/B/G/N FCC COMP
WE SHIP SAME  CISCO1941W-A/K?9 1941 ROUTER W/ 802.11 A/B/G/N FCC COMP
WE SHIP SAME  CISCO1941/K9 1941 Integrated Services Router 2GE 256F/
WE SHIP SAME  CISCO1941/K9 1941 Integrated Services Router 2GE 256F/
WE SHIP SAME  Cisco WS-C4948-E CATALYST 4948 48-PORT  1YR  
WE SHIP SAME  CISCO WS-C3750X-48PF?-S SWICTH 1 YR  3750X-48PF 
WE SHIP SAME  CISCO WS-C3750X-24T-?L SWICTH 1 YR  3750X-24T 
WE SHIP SAME  CISCO WS-C3750X-24S-?E SWITCH 1 YR  3750X-24S 
WE SHIP SAME  CISCO WS-C3750X-24S-?E SWITCH 1 YR  3750X-24S 
WE SHIP SAME  CISCO WS-C3750V2-48P?S-S SWICTH 1 YR  
WE SHIP SAME  CISCO WS-C3750V2-48P?S-S SWICTH 1 YR  
WE SHIP SAME  CISCO WS-C3750V2-24T?S-E 3750V2-24TS SWICTH 1 YR WARRANT
WE SHIP SAME  CISCO WS-C3750V2-24T?S-E 3750V2-24TS SWICTH 1 YR WARRANT
WE SHIP SAME  CISCO WS-C3750V2-24P?S-S SWICTH 1 YR  3750V2-24
WE SHIP SAME  CISCO WS-C3750V2-24P?S-S SWICTH 1 YR  3750V2-24
WE SHIP SAME  CISCO WS-C3750V2-24P?S-E SWICTH 1 YR  3750V2-24P
WE SHIP SAME  CISCO WS-C3750G-48PS?-S 3750G-48PS SWICTH 1 YR  
WE SHIP SAME  CISCO WS-C3750G-48PS?-S 3750G-48PS SWICTH 1 YR  
WE SHIP SAME  CISCO WS-C3750G-24TS?-S1U 3750G-24TS SWICTH 1YR 
WE SHIP SAME  CISCO WS-C3750G-24TS?-S1U 3750G-24TS SWICTH 1YR 
WE SHIP SAME  CISCO WS-C3750G-24PS?-S CATALYST 3750G-24PS SWICTH 1 YR WARRA
WE SHIP SAME  CISCO WS-C3750G-24PS?-S CATALYST 3750G-24PS SWICTH 1 YR WARRA
WE SHIP SAME  CISCO WS-C3750G-12S-?S CATALYST 3750G-12S SWICTH  1YR WARRANT
WE SHIP SAME  CISCO WS-C3750G-12S-?S CATALYST 3750G-12S SWICTH  1YR WARRANT
WE SHIP SAME  CISCO WS-C3750-48PS-?S CATALYST 3750-48PS SWICTH 1 YR WARRANT
WE SHIP SAME  CISCO WS-C3750-48PS-?S CATALYST 3750-48PS SWICTH 1 YR WARRANT
WE SHIP SAME  CISCO WS-C3750-24TS-?S CATALYST 3750-24TS SWICTH 1 YEAR WARRA
WE SHIP SAME  CISCO WS-C3750-24TS-?S CATALYST 3750-24TS SWICTH 1 YEAR WARRA
WE SHIP SAME  CISCO WS-C3750-24TS-?E CATALYST 3750-24TS SWICTH 1 YEAR WARRA
WE SHIP SAME  CISCO WS-C3750-24TS-?E CATALYST 3750-24TS SWICTH 1 YEAR WARRA
WE SHIP SAME  CISCO WS-C3750-24PS-?S Switch 3750-24  1YR  
WE SHIP SAME  CISCO WS-C3560X-48T-?L 3560X SWICTH 1 YEAR  
WE SHIP SAME  CISCO WS-C3560X-48T-?L 3560X SWICTH 1 YEAR  
WE SHIP SAME  CISCO WS-C3560X-24T-?S CATALYST 3560X-24T SWICTH 1 YEAR
WE SHIP SAME  CISCO WS-C3560X-24T-?S CATALYST 3560X-24T SWICTH 1 YEAR
WE SHIP SAME  CISCO WS-C2960-24-S 2960-24 SWICTH 1 YEAR  Fas
WE SHIP SAME  CISCO WS-C2960-24-S 2960-24 SWICTH 1 YEAR  Fas
WE SHIP SAME  CISCO WS-C2960-24PC-?S 2960-24PC SWICTH 1 YEAR  
WE SHIP SAME  CISCO WS-C2960-24PC-?S 2960-24PC SWICTH 1 YEAR  
WE SHIP SAME  CISCO WS-C2960-24LT-?L 2960-24LT SWICTH 1 YEAR  
WE SHIP SAME  CISCO WS-C2960-24LC-?S CATALYST 2960-24LC SWICTH 1 YEAR
WE SHIP SAME  CISCO WS-C2960-24LC-?S CATALYST 2960-24LC SWICTH 1 YEAR
WE SHIP SAME  CISCO SPA-8XOC12-POS 8-PORT OC12/STM4 POS SHAR.ADAP. Fa
WE SHIP SAME  CISCO SPA-8XFE-TX 8-PORT 10/100 ETHERNET SHARED PORT ADAPTER
WE SHIP SAME  CISCO SPA-8XFE-TX 8-PORT 10/100 ETHERNET SHARED PORT ADAPTER
WE SHIP SAME  CISCO SPA-8X1GE-V2 Cisco 8-Port Gigabit Ethernet Shared Port 
WE SHIP SAME  CISCO SPA-8X1GE-V2 Cisco 8-Port Gigabit Ethernet Shared Port 
WE SHIP SAME  Cisco SPA-8X1FE-TX-V?2 8-PORT FAST ETHERNET TX SHARED 
WE SHIP SAME  CISCO SLM2024T SG200-26 SLM2024T-NA 26PORT GIGABIT SMART 
WE SHIP SAME  CISCO SLM2024T SG200-26 SLM2024T-NA 26PORT GIGABIT SMART 
WE SHIP SAME  CISCO SGE2000P CISCO 24PORT GB 4SFP  STACKABLE SWIT
WE SHIP SAME  CISCO SGE2000P CISCO 24PORT GB 4SFP  STACKABLE SWIT
WE SHIP SAME  CISCO SFP-10G-SR 10GBASE-SR SFP MODULE
WE SHIP SAME  CISCO SFP-10G-SR 10GBASE-SR SFP MODULE
WE SHIP SAME  CISCO PVDM2-64 64-channel Packet /Voice DSP Module
WE SHIP SAME  CISCO PVDM2-64 64-channel Packet /Voice DSP Module
WE SHIP SAME  Cisco CP-7937G Unified IP Conference Station 7937 C
WE SHIP SAME  Cisco CP-7937G Unified IP Conference Station 7937 C
WE SHIP SAME  CISCO AIR-LAP1261N-A?-K9 11GN CTLR-BASED AP EXT ANT A REG DOMA
WE SHIP SAME  CISCO AIR-LAP1261N-A?-K9 11GN CTLR-BASED AP EXT ANT A REG DOMA
WE SHIP SAME  CISCO AIR-AP1141N-A-?K9 11GN FIXED AUTO AP INT ANT A REG D
WE SHIP SAME  CISCO AIR-AP1141N-A-?K9 11GN FIXED AUTO AP INT ANT A REG D
WE SHIP SAME  CISCO AIR-AP1042N-A-?K9 11AGN FIXED AUTO AP INT ANT A REG 
WE SHIP SAME  CISCO AIR-AP1042N-A-?K9 11AGN FIXED AUTO AP INT ANT A REG 
WE SHIP SAME  AIR-CAP3502I-A?-K9 CISCO 1yr 
We buy Lucent ica Plexus DMX CBX Genband STINGER
Watlow PPC-2000 Anafaze Programmable Process Controller
WATLOW PPC-2000 ANAFAZE PROGRAMMABLE PROCESS CONTROLLER
WATLOW 97B0-DAAA-00RG TEMPERATURE CONTROLLER 24-28VDC
WATLOW 146D-1J2D-3100 TEMPERATURE CONTR 0-750'C 120VAC
WATLOW 146D-1E1D-3100 TEMPERATURE CONTR 0-799'C 120VAC
WATLOW 103K-1601-1000 TEMPERATURE CONTR 0-315°C 120VAC
 SynchLink Drive Interface Module QTY
 SERIES E REV AA1 F/W REV K.2
 SERIES E CAT REV U01 REV A01 F/W K
 SERIES E CAT REV K01 F/W REV D.1
 SERIES C F/W REV B PKG 2011 QTY
 SERIES C F/W REV B PKG 2011 QTY
 SERIES C F/W REV A PKG 06/09/2009
 SERIES C F/W REV A
 SERIES C F/W B PKG 01/25/2012 QTY
 SERIES C CAT REV G01 REV F01 F/W B
 SERIES B F/W REV D
 SERIES A F/W REV 2.3
 SERIES A F/W REV 2.005 MFG 02/09/2009
 SERIES A F/W 1.4 PKG DATE 09/15/2010
 SER C F/W REV A PKG DATE 07/18/2011
 REV B05 F/W REV I PKG 06/25/2010 QTY
 QUANTITY AVAILABLE SERIES A F/W 1.9
 QUANTITY AVAILABLE SERIES A
 FLEX Analog Input Thermocouple/RTD/mV
 F/W REV 3.006 PKG DATE 09/23/2010
 Color/Touch Screen/EtherNet Terminal
 AVAILABLE SERIES C F/W REV A
 AVAILABLE SERIES A F/W REV A
 20-HIM-A3 /A PowerFlex HIM Included
WARD BECK 16 Channel ANALOG Summing Mixer box Vintage RECORDING Mixing CONSOLE 
Wago ETHERNET 750-880 Starter Kit 2.0 51262278 ETHERNET-START?ERKIT 2.0
Wago ETHERNET 750-849 StarterKit 2: 51220618 
Wago 758-876/000-11?2 WAGO-I/O-IPC-P?14 Linux 2.6 codesys visu CANopen master
Wago 758-876/000-11?1 WAGO-I/O-IPC-P?14 Linux 2.6 PROFIBUS dp master 
Wago 758-875/000-11?2 WAGO-I/O-IPC-C?10 e Linux 2.6 CANopen master
Wago 758-875/000-11?1 WAGO-I/O-IPC-C?10 e Linux 2.6 codesys visu PROFIBUS dp mstr
Wago 758-874/000-11?2 WAGO-I/O-IPC-C?6 Linux 2.6 codesys visu CANopen master
Wago 758-874/000-11?1 WAGO-I/O-IPC-C?6 Linux 2.6 codesys visu PROFIBUS dp master
Wago 758-874/000-11?0 WAGO-I/O-IPC-C?6 Linux 2.6 codesys visu
Wago 758-870/000-11?2 WAGO-I/O-IPC-G?2 Linux 2.6 codesys visu CANopen master
Wago 758-870/000-11?1 WAGO-I/O-IPC-G?2 Linux 2.6 codesys visu PROFIBUS dp master
Wago 758-870/000-11?0 WAGO-I/O-IPC-G?2 Linux 2.6 codesys visu
Wago 750-873 ETHERNET TCP/IP  RS232 Programmable Fieldbus Controller
Wago 750-872/020-00?0 Programmable Fieldbus Contr for econtrol Applications
Wago 750-872 Programmable Fieldbus Controller for econtrol Applications
Wago 750-842 ETHERNET TCP/IP PROGRAMMABLE FIELDBUS CONTROLLER 
Wago 750-833 PROFIBUS DP/V1 PROGRAMMABLE FIELDBUS CONT
Wago 750-671 STEPPER MODULE 24 V / 15 A
Wago 750-654 DATA EXCHANGE MODULE
WAGO 750-653-000-01?1 Serial Interface RS-485
Wago 750-644 Bluetooth I/O Module
Wago 750-642 RADIO RECEIVER MODULE
Wago 750-641 DALI/DSI MASTER MODULE
Wago 750-585 2-CHANNEL ANALOG OUTPUT MODULE 0-20 mA Ex i
Wago 750-557 4-CHANNEL ANALOG OUTPUT MODULE 
Wago 750-554 2-CHANNEL ANALOG OUTPUT MODULE 
Wago 750-553 4-CHANNEL ANALOG OUTPUT MODULE 0-20 mA
Wago 750-493/000-00?1 3-phase power measurement module
Wago 750-493 3-phase power measurement module 1 A
Wago 750-492 2-CHANNEL ANALOG INPUT MODULE 
WAGO 750-485 750485 2-Channel Analog input Module 4-20 mA Ex i
Wago 750-481/003-00?0 2-CHANNEL ANALOG INPUT MODULE FOR RESISTOR SENSORS Ex i
Wago 750-479 2-CHANNEL ANALOG INPUT MODULE 
Wago 750-478 2-CHANNEL ANALOG INPUT MODULE 
Wago 750-474 2-CHANNEL ANALOG INPUT MODULE 4-20 mA SINGLE ENDED
Wago 750-473/005-00?0 2-CHANNEL ANALOG INPUT MODULE
Wago 750-473 2-CHANNEL ANALOG INPUT MODULE
Wago 750-469/003-00?0 2-CHANNEL ANALOG INPUT MODULE THERMOCOUPLE
Wago 750-469/000-00?6 2-CHANNEL ANALOG INPUT MODULE 
Wago 750-469 2-CHANNEL ANALOG INPUT MODULE 
Wago 750-468 4-CHANNEL ANALOG INPUT MODULE 
Wago 750-467 2-CHANNEL ANALOG INPUT MODULE 
Wago 750-466 2-CHANNEL ANALOG INPUT MODULE 
Wago 750-466 2-CHANNEL ANALOG INPUT MODULE 
Wago 750-461/003-00?0 2-CHANNEL ANALOG INPUT MODULE
Wago 750-461/000-00?3 2-CHANNEL ANALOG INPUT MODULE 
WAGO 750-461 USPP 750461
WAGO 750-461 NSFP 750461
Wago 750-461 2-CHANNEL ANALOG INPUT MODULE
Wago 750-460/000-00?5 4-CHANNEL ANALOG INPUT MODULE
Wago 750-460/000-00?3 4-CHANNEL ANALOG INPUT MOD
Wago 750-460 4-CHANNEL ANALOG INPUT MODULE 
Wago 750-457 4-CHANNEL ANALOG INPUT MODULE 
Wago 750-346 DeviceNet ECO FIELDBUS COUPLER 125-500 kBaud DIGITAL AND ANALOG SIG
Wago 750-344 INTERBUS ECO FIELDBUS COUPLER 
Wago 750-343 PROFIBUS DP ECO FIELDBUS COUPLER 
Wago 750-342 ETHERNET TCP/IP FIELDBUS COUPLER 10 MBit/s
WAGO 750-342 750342 ETHERNET TCP/IP Fieldbus Coupler
Wago 750-341 ETHERNET TCP/IP FIELDBUS COUPLER 
Wago 750-341 ETHERNET TCP/IP 100 MBIT FIELDBUS COUPLER
Wago 750-337 CANopen Fieldbus Coupler 
Wago 750-333 PROFIBUS DP/V1 FIELDBUS COUPLER 
WAGO 750-333 750333 Profibus DP/V1 Fieldbus Coupler
Wago 750-324 INTERBUS FIELDBUS COUPLER 500 kBaud DIGITAL SIGNALS
Wago 750-316 MODBUS FIELDBUS COUPLER
Wago 750-315 MODBUS FIELDBUS COUPLER
Wago 750-312 MODBUS FIELDBUS COUPLER
WAGO 750-307 CANopen Fieldbus Coupler I/O Module
WAGO 750-306 750306 DeviceNet Fieldbus Coupler
WAGO 750-303 750303 Profibus DP/FMS
WAGO 750-301 750301 Profibus DP/FMS
w/ 1 year 
VWIC-2MFT-E1-D?I CISCO 2-PORT MULTIFLEX TRUNK- E1 W/DROP INSERT
VWIC-2MFT-E1-D?I CISCO 2-PORT MULTIFLEX TRUNK- E1 W/DROP INSERT
VWIC-2MFT-E1 CISCO 2-PORT RJ-48 MULTIFLEX TRUNK E1
VWIC-2MFT-E1 CISCO 2-PORT RJ-48 MULTIFLEX TRUNK E1
VWIC2-2MFT-T1/?E1 CISCO 
VWIC2-2MFT-T1/?E1 CISCO 
VWIC2-1MFT-G70?3 1-Port Multiflex Trunk G.703 E1 Voice/Wan Interface 
VWIC2-1MFT-G70?3 1-Port Multiflex Trunk G.703 E1 Voice/Wan Interface 
VWIC2-1MFT-G70?3 1-PORT 2ND GEN MULTIFLEX TRUNK VOICE/WAN INT. CARD G.703
VWIC2-1MFT-G70?3 1-PORT 2ND GEN MULTIFLEX TRUNK VOICE/WAN INT. CARD G.703
VWIC-1MFT-G703 CISCO 1-PORT RJ-48 MULTIFLEX TRUNK G.703
VS-S720-10G-3C Cisco Virtual Switching SUP. Engine 720 W/ 2X 10 Gig Eth. 6500/76
VS-S720-10G-3C Cisco Virtual Switching SUP. Engine 720 W/ 2X 10 Gig Eth. 6500/76
VS-S2T-10G Cisco Catalyst 6500 Series Supervisor Engine 2T Control processor
VS-S2T-10G Cisco Catalyst 6500 Series Supervisor Engine 2T Control processor
VP-MOD-4FC-2P 2x 4g Fibre Channel I/o Module
VMware 2U Server 4x Six-Core Istanbul 2.6GHz 128GB RAM
VMware 1U Server AMD Istanbul SIX-Core 2.4GHz 32GB RAM
VMware 1041M-T2B Server 4 Six-Core Istanbul 256Gb RAM
VMware 1041M-T2B Server 4 Six-Core Istanbul 128Gb RAM
VMETRO VME Midas M120R-16D2 with I/O modules DPIO-LI/32k/16?bit  DPIO-LI/32k
VMETRO VME Midas M120R-16D2 with I/O module DPIO-LI/32k/16?bit
Vivotek IP7154 Progressive Scan Wireless Network Camera  and Night 1/4" CCD 
VIVOTEK IP7154 PROGRESSIVE /NIGHT WIRELESS CAMERA
Vivotek IP7154 /Night Network Camera
VIVOTEK IP7154   Night Progressive Scan WLAN Fixed Network Camera 640x480
VIVOTEK IP7153 PROGRESSIVE /NIGHT NETWORK CAMERA
Vivotek IP7153 /Night PoE Fixed Network Camera
VIVOTEK IP7153   Night Progressive Scan PoE Fixed Network Camera 640x480 PoE
VIQ Audio Motu 8 Pr
VIPA SLIO Remote IO Starterkit 800-1DK10 -Profibus Cable  Connectors ET 200S
VINTECH 1272 NEVE SOUND  Top Pro Studio Sound  Perfect A1 Condition
Vigilant PCI ENCDAC with I/O expander
View ANYWHERE 1.6GHz 2GB 60GB Windows based Tablet PC Motion Computing LE1600
View ANYWHERE 1.5GHz 1GB 30GB Windows based Tablet PC Motion Computing LE1600
VIC3-4FXS/DID CISCO 4-PORT VOICE INTERFACE CARD FXS AND DID
VIC3-4FXS/DID CISCO 4-PORT VOICE INTERFACE CARD FXS AND DID
VIC-2E/M CISCO TWO-PORT VOICE INTERFACE CARD EANDM
VIC2-2FXS CISCO TWO-PORT VOICE INTERFACE CARD FXS
VIC2-2FXO CISCO TWO-PORT VOICE INTERFACE CARD FXO UNIVERSAL
VIC2-2E/M CISCO TWO-PORT VOICE INTERFACE CARD EANDM
VIC2-2BRI-NT/T?E CISCO TWO-PORT VOICE INTERFACE CARD BRI NT AND TE
VIBRO METER IOC4T USPP IOC4T
VIA Artigo A2000 Barebones Storage Server 1.5 GHz VIA C7®-D Brand 
VG224 CISCO 24 PORT VOICE OVER IP ANALOG PHONE GATEWAY
VG224 CISCO 24 PORT VOICE OVER IP ANALOG PHONE GATEWAY
VEXTA Fine Step 5-Phase Driver DFR1507  ONTEC ONTEC SAVE NET I/O MODULE
VERY NICE OPTO 22 MISTIC PROCESSOR UNIT MODEL 200SX
VeriFone Vx570 Dual Mode Terminal  IP/Dial  6MB
VeriFone Vx570 Dual Mode Terminal  IP/Dial  12MB
Verifone Vx570 Dual Comm Port 6meg Credit Card Terminal
VeriFone Vx570 Dial Terminal 
Verifone Vx570 Dial 6meg PCI DSS Credit Card Terminal
VEKTRONICS 200014 NSPP 200014
Value upgrade kit w/Onboard Videoaudio|550W|Elite Case
UST US TSUBAKI TSB50 SHOCK RELAY 0.3-3S 115/230VAC
Uson Corporation 403X300 Unson Corporation 403-x300 I/O Module 403x300 
Uson Corp I/O Module 403-X300G 403-X300G
USON CORP 403-X300J Uson Corp 403 X300J 403X300J I/O Module 
USON CORP 403-X300H USPP 403X300H
USON CORP 403-X300H NSFP 403X300H
USON CORP 401-X300F USPP 401X300F
USON 403-X300G USPP 403X300G
USON 403X300 REMAN. I/O MODULE 403-X300
Uryu Seisaku I/O Control Unit Module Card UEC-E200MD
Uryu Seisaku I/O Control Unit Module Card UEC-E200 I/0
uPLC01 PLC with CANopen DeviceNet EtherNet/IP Modbus
UPGRADED CISCO1841-HSEC?/K9 ROUTER WITH 1YR  1841-HSEC/K9
UPGRADED CISCO1841-HSEC?/K9 ROUTER WITH 1YR  1841-HSEC/K9
Unisphere Juniper T3 Frame T3-3F ERX-700 ERX-1400 Mod
Unisphere Juniper ERX1400 SRP-10-ECC 10-Gbps SRP module  Make Offer
Unisphere Juniper CT1-Full CT1_I/O ERX 1400 90   Free Overnight Ship
Unisphere  Juniper  ERX 1400 Base 14 Chassis 90  
UNIPRO 24002156 USPP 24002156
UNICO 704-476  CONVERTER I/O MODULE 704476
UNICO 306-563 USPP 306563
Unico 306-563 306563 I/O Parallel Interface Module 
Under valid Lenovo factory  until 2015-03-31
Under valid Lenovo factory  until 2015-03-31
UC520W-8U-4FXO?-K9 8U CISCO CME BASE CUE AND PHONE FL W/4FXO 1VIC WIFI
UC520W-8U-4FXO?-K9 8U CISCO CME BASE CUE AND PHONE FL W/4FXO 1VIC WIFI
UC520W-8U-4FXO?-K9 8U CISCO CME BASE CUE AND PHONE FL W/4FXO 1VIC WIFI
UC520-16U-4FXO?-K9 CISCO 16U CME BASE CUE  PHONE FL W/4FXO 1VIC
UC520-16U-4FXO?-K9 CISCO 16U CME BASE CUE  PHONE FL W/4FXO 1VIC
UBR7246VXR CISCO UBR 7246 4MC  2PA SLOTS 1YR - ASK 4 QTY
UBR7246VXR CISCO UBR 7246 4MC  2PA SLOTS 1YR - ASK 4 QTY
UBR7200-NPE-G1 CISCO UBR NPEG1 ENGINE W/ 512MB D/64MB F 3 GE/FE/E
UBR7200-NPE-G1 CISCO UBR NPEG1 ENGINE W/ 512MB D/64MB F 3 GE/FE/E
UBR7200-NPE-G1 CISCO UBR NPEG1 ENGINE W/ 512MB D/64MB F 3 GE/FE/E
UBR7200-NPE-G1 CISCO UBR NPEG1 ENGINE W/ 512MB D/64MB F 3 GE/FE/E
UBR7200-NPE-G1 CISCO UBR NPEG1 ENGINE W/ 512MB D/64MB F 3 GE/FE/E
U6180-60001 HP Printer Maintenance Kit 2300 U6180-60001 
TYAN TRANSPORT VX50 B4985 Thunder n4250QE S4985 OPTERON Barebone B4985V50V4H-4P
TYAN TRANSPORT VX50 5U 8xAMD Optreon 865 16GB 4TB 9550SX RAID Storage Server
Tyan Thunder S2891G2NR Dual Opteron K8SRE DDR400 2xG
TYAN THUNDER N6550EX S4989 S4989-SI AMD QUAD SKT 1207 SERVER BOARD S4989WG2NR-SI
TYAN THUNDER N6550EX S4989 S4989-LE AMD QUAD 1207 SERVER BOARD S4989WG2NR-LE
Tyan Thunder K8QS Pro S4882 4-way Opteron platform Motherboard 4x Opteron 880 
TYAN Tempest i5000PX S5380 In Socket 771 Server MOTHERBOARD S5380G2NR
Tyan S8236GM3NR-IL Socket G34 AMD SR5690/SP5100 Chipset EEB Motherboard
Tyan S8236GM3NR-IL Socket G34 AMD SR5690/SP5100 Chipset EEB Motherboard
Tyan S8236GM3NR-IL Socket G34 AMD SR5690/SP5100 Chipset EEB Motherboard
Tyan S4882UG2NR Thunder K8QS Pro MB Refurbished
Tyan S2882UG3NR K8S Pro Dual S940 MB Refurbished
TYAN S2882 THUNDER K8S PRO S2882G3NR DUO OPTERON AMD-8131 CHIPSET 8 DDR SLOT
TYAN S2881 THUNDER K8SR S2881G2NR DUO OPTERON AMD-8131 CHIPSET 8 DDR SLOT
TYAN S2880 THUNDER K8S S2880UGNR. DUO SOCKET 940 AMD-8131 CHIPSET ON BOARD SCSI
Tyan S2721UGN-533 i7501 Pro Dual Xeon MB Refurbished
T-Win XJ2000-4483 SAS/SATA JBOD Storage System 4U 24-bay  for 48 Drives 
TWDLMDA40DUK extendable PLC base Twido 24 V 24 I 24 V DC 16 O solid state
TV One C2-8260 Corio2 DVI-U/3G/HD/SD?-SDIAudio Switcher
TV One C2-8210 Corio2 DVI-U/3G/HD/SD?-SDI Switcher
TV One C2-8160 Corio2 10x2 DVI-U Aud Seamless Switcher
TV One C2-8130 Corio2 12x2 DVI-U Seamless Switcher
TV One C2-8120 Corio2 8x2 DVI-U Seamless Switcher
TV One C2-8110 Corio2 6x2 DVI-U Seamless Switcher
TV One C2-6204 CORIOview 4-Window 3G-SDI Processor
TV One C2-6104A CORIOview 4-Window DVI-U Processor
TV One C2-2375A CORIO2 CV/DVI/3G-SDI Converter
TSXSCY21601 TESTED Modicon Premium 485MP TSX-SCY-216-01
TSXSCY21601 Modicon Premium 485 MP TSX-SCY-216-01
TSXSCY21600 Modicon Premium 485 MP TSX-SCY-21600
TSXSAY1000  Modicon Premium BUS Coupler Module TSX-SAY-1000 TSX57-A2S-I
TSXSAY100  Modicon Premium AS I Module TSX SAY 100
TSXIBY100 Modicon Premium TSX-IBY-100
TSXETY5102  Modicon Premium TSX57 10/100 FCAST MOD TSX-ETY-5102
TSXETY110  Modicon Premium TCP/IP TSX-ETY-110
TSXDSY32T2K Modicon Premium Output TSX-DSY-32T2K
TSXDSY32T2K Modicon Premium Output TSX-DSY-32T2K
TSXDMZ28DT TESTED Modicon Micro Combination Module TSX-DMZ-28DT
TSXDMZ28AR TESTED Modicon Micro Input Module TSX-DMZ-28AR
TSXDEY32D2K Modicon Premium Digital Input TSX DEY 32D2K
TSXDEY32D2K Modicon Premium Digital Input TSX DEY 32D2K
TSXDEY16A5 PREMIUM INPUT MODULE TSX-DEY-16A5
TSXDET3232 Modicon Premium 24 VDC Input TSX-DET-3232
TSXDET1604 Modicon Premium 110/115 VAC Input TSX-DET-1604
TSXCUSBMBP Modicon Premium Modbus Plus Converter TSX-CUS-BMBP
TSXCTZ1A Modicon Micro 1 Channel Counter Module TSX-CTZ-1A
TSXCAY42 Modicon Premium Analog Motion Module TSX-CAY-42
TSXASZ401 TESTED Modicon Micro Analog Output Module TSX-ASZ-401