名稱:工程設備CAN總線控制系統設計
1引言
工程設備的數字化、信息化及施工管理一體化是當前工程設備的發展熱潮，自20世紀90年代始，發達國家的制造業就已經開始進行相關技術的探索，*大量應用于*的工程設備設計中。同時，以微計算機為代表的智能控制器被大量采用，智能節點間的信息流量*增加。將車載電子設備按照一定的協議聯網，并加以有效地信息綜合，使之達到資源和功能的共享已成為發展趨勢。
現場總線技術是指把單個分散的測量控制設備變成網絡節點，以現場總線為紐帶，把它們連接成可以相互溝通訊息、共同完成自控任務的網絡系統與控制系統。CAN（Controller Area Network）總線，又稱控制域局域網，屬于總線式串行通信網絡，zui早由BOSCH公司在80年代提出，由于可靠性高、實時性強、靈活方便，便于檢測維護，因而被廣泛應用。在工程設備領域，美國CAT公司生產的CAT980G裝載機，日本小松的WA380-3和WA500-3，日本川崎的KLD80ZⅢ等均采用CAN總線技術，提高設備的整體控制技術水平。
根據CAN總線的技術特點，本文設計了一種基于CAN總線的工程設備控制系統，通過分布式智能控制來提高工程設備的控制技術和信息化水平。
2系統組成與功能特點
2.1系統組成
傳統的工程裝備控制系統采用集中式控制，除主控制器外一般都不具備可智能化的條件。基于CAN總線的控制系統采用分布式智能總線控制，將各功能模塊做成智能終端，再通過CAN總線連接，并輔之以一定的通訊協議，這樣不僅提高了整個系統的可靠性及智能化水平，同時降低了系統的復雜程度。
系統由主控制器、操縱盒、傳感器、執行機構和虛擬儀表等組成，各部件采用CAN總線互聯。主控制器負責系統的信息協調與處理；作業終端是作業手對作業過程進行干預的主要手段；傳感器負責感知系統的狀態；執行器負責完成經主控制器處理后的動作；虛擬儀表提供了一種可視化的人機界面，用文字或圖形的方式告知作業手器材當前的狀態；調試診斷儀負責定位系統故障源。各模塊都是自成一體的智能終端，各模塊可以有多個，只要給它們分配不同的標識符（ID號）即可，各模塊通過4芯屏蔽電纜并聯起來，4芯電纜中2根（電源正和電源負）用于給終端供電，另外2根（CANH和CANL）用于終端間通信。本系統組成如圖1所示。
圖1基于CAN總線的智能控制系統組成
總線的智能控制系統組成
2.2系統功能特點
與傳統的集中式控制系統相比，本控制系統具有如下功能特點：
（1）防誤操作功能。設計人員可以很容易地通過軟件編程屏蔽掉本系統中可能出現的誤操作，而只開放允許的操作，同時還可根據需要發出聲光報警，告知作業手有操作錯誤；
（2）作業向導功能。操縱盒的智能化和系統數據的共享使得設計人員可以根據作業過程，通過軟件編程點亮相應的指示燈，告知作業手許可的操作。實現器材操作的“傻瓜”化；
（3）系統自我診斷自我恢復。智能化終端可以方便地對自身的狀態進行診斷，并向總線發送相關信息供其它智能節點處理用，使器材使用者不用掌握太多的專業知識就可以容易地判斷問題所在；同時對于總線內部錯誤，總線系統可以通過自身軟件進行自動恢復
（4）狀態指示。通過虛擬儀表或操縱盒指示燈指示器顯示系統當前狀態。
（5）數據共享，信息全面，可靠性高。系統的所有數據都可在CAN總線上接收到，可以很容易地實現信息共享，減少了數據的重復處理，降低了對主控制器的要求；同時CAN總線具有線間干擾孝抗*力強的特點。系統采用模塊化管理，各模塊按其功能分散布置，簡化了布線并縮短了線束的長度，從而降低了耦合電流的產生，減小了線間干擾。同時在軟件上，CAN總線采用短幀傳輸，這樣使總線數據報文在傳輸過程中有較強的抗*力；（6）擴充性強，產品升級快，性價比高。
（7）參數配置靈活。可以通過CAN總線進行參數配置，如開關量可以根據廠家需求設置其門限及控制極性(正負控)，模擬量可根據廠家提供的傳感器性能曲線進行校正，相關位置量也可以方便地進行總線標定，縮短產品調試時間。
3總線通訊協議設計
CAN通信協議主要描述設備之間的基于基本CAN通信的應用程序信息傳遞方式。CAN通信層的定義與開放系統互連（OSI）參考模型*，但只定義了zui下面兩層：物理層和數據鏈路層。由于沒有規定應用層，因此CAN協議本身并不完整，需要一個應用層協議來定義CAN報文中的標識符（11/29位）、8字節數據的分配與使用。目前上使用較多的高層協議有CANopen、J1939和DeviceNet等，但是由于工程設備的控制節點一般不多，*可以根據自身特點，設計高效的應用層協議。下面給出幾個實用的設計方法。
3.1報文ID的設計
在通信標識符，即ID號分配時，對于關重信息幀或要求快速響應的信息幀采用低號ID，如裝備控制中需要實時反饋信號的各作業機構到位信號；對于傳遞僅用于監測而不參與實時控制信號的信息幀應采用高ID號，如油溫、油壓、車姿等狀態信息。
另外，在驗收濾波器中對驗收代碼寄存器（ACR）和驗收屏蔽寄存器（AMR）正確設置可以屏蔽與該節點不相干的ID號信息，可以提高有效信息的響應速度。
3.2報文的循環發送與查詢發送
對于參與控制的重要信息幀一般應采取定時循環發送方式，保證信息的實時刷新；而對于軟硬件版本查詢、參數標定等需要臨時數據服務的則主要采用C/S（客戶機/服務器）方式進行信息幀發送，即進行特定的信息幀定義，當服務器收到客戶機的參數查詢或標定請求后再處理并發送相應的回饋信息鄭
3.3“心跳”檢測
當數據源節點退出總線后（故障或人為退出），接收節點相應的接收數據緩沖區的數據必須進行復位，防止數據不*造成非期望事件發生。因此，一般要求源節點定時發送“心跳”信息，即設計一特定的信息幀或把特定信息幀中的某一位設計成代表該節點的“心跳”，節點啟動工作后每隔一定時間發送“心跳”信息幀或定義的“心跳位”高低電平變化一次，這樣如果在一定的時間內沒有收到該節點“心跳”信息，則可以判斷節點不在總線上，進而做出相應的事件處理。
圖2數據標定流程圖
數據標定流程圖
3.4傳輸錯誤檢驗
為了提高數據通訊的可靠性，對于關鍵數據幀（如標定數據幀），采用和校驗的方式防止數據傳輸錯誤，即數據源節點將zui后一個數據字節定義為校驗字節，采用累加和等校驗等方式，將運算結果的低8位（即低位字節）作為校驗數據值。數據接收節點收到數據幀后，通過運算進行比較，結果無誤后再進行相應的賦值處理。
3.5數據查詢與參數標定
數據查詢和標定采用重復發送控制信息直到得到特定反饋信息才結束的通信方式，流程如圖2所示。
4 CAN總線作業終端設計
將作業終端設計成一個智能節點，采用CAN總線通信，則可以減少連接線纜芯數的數量，提高工作可靠性；同時數據傳輸內容豐富，可以傳遞狀態信息，也可以傳送報文信息，提高信息化程度；并可增加通信距離，提高工作的適應性。
（1）硬件設計
基于帶CAN總線控制器的單片機 PIC18F458系統設計，通過CAN總線收發器 MCP2551與其它節點總線相連，外圍有開關量輸入電路、模擬量輸入電路、數碼管顯示電路、開關量輸出電路、CAN收發器和電源電路等，見圖3。
圖3 CAN總線作業終端硬件原理框圖
總線作業終端硬件原理框圖
5主控制器設計
主控制器為主要的操作信號采集的執行單元，它將系統的操縱信號進行防誤操作處理后控制作業機構的執行元件。
主控制器采用EPEC系列高可靠性可編程控制器（PLC）設計，該系列控制器在國內外工程機械中應用較廣泛，具有兩個CAN通訊口，本身即可兼做多協議的網關。該型控制器具有以下優點：抗電磁干擾、抗振動、耐油、適應環境能力強、結構緊湊、密封性好、具有自我保護能力的特點，可以*在野外惡劣環境條件下工作，可以直接驅動多種執行器，如電液比例閥、伺服馬達等，特別適用于移動設備的使用。當然，就CAN系統作業集成角度來看，STW，INTER CONTROL等控制器的性能也較好，各有其特色，可以根據控制需求進行選擇。
6虛擬儀表設計
虛擬儀表主要用于終端顯示，以提供各種作業信息。選用PC104主板作為嵌入式計算機系統的硬件，硬件配置表如表1所示，軟件采用實時性好的VxWorks操作系統，利用VxWorks BSP包完成移植。
表1虛擬儀表硬件配置表
虛擬儀表硬件配置表
虛擬儀表可以完成工作狀態顯示、傳感器數據標定、視頻顯示等，提供了良好的人機交互界面，并可以通過RS232接口接入導航定位信息，提高裝備的信息化程度。
7 CAN總線調試診斷儀設計
調試診斷儀基于BIT技術，采用嵌入式系統架構，硬件以ARM控制器為核心。ARM系列處理器采用32位嵌入式RISC結構，內部集成多級流水線以提高處理器指令的執行速度，其強大功能與外圍電路的配合，將信號采集、處理、故障診斷及網絡通信等功能集于一體，特別適合作為智能儀器設備的開發平臺。 HMS30C7202是基于ARM720T的32位處理器，包括了PC機的所有基本功能。具有高性能低功耗的特點，片內資源非常豐富，具有*的集成度，非常適用于嵌入式系統應用。調試診斷設備硬件由基于ARM芯片 HMS30C7202的核心模塊加外圍電路組成，見圖4。為了充分發揮ARM芯片的效率，提高任務級的響應時間，采用實時內核C/OS-II來進行資源管理。C/OS-II是一個完整、可移植的搶占式實時多任務操作系統，具有執行效率高、占用空間孝實時性能優良和可擴展性強的特點。用戶界面基于MiniGUI平臺進行開發，*地提高了人機交互性能。
圖4調試診斷儀硬件架構
調試診斷儀硬件架構

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MITSUBISHI A1S-CPU-S1 USPP A1SCPUS1
MITSUBISHI A1S-CPU USPP A1SCPU
MITSUBISHI A1S-68AD A1S68AD X 4 Four units
MITSUBISHI A1S-62RD3N USPP A1S62RD3N
MITSUBISHI A1S62DA OUTPUT MODULE ANALOG 2POINT
Mitsubishi A1S61PN A2ASCPU A1SX40 A1SY40 A1SG60 A1S38B A1SJ71UC24-R2
MITSUBISHI A1S SYSTEM w. A1SCPU A1SD61 A1SY80 A1SX40 
MITSUBISHI A1N-CPU USPP A1NCPU
MITSUBISHI A1-CPU USPP A1CPU
MITSUBISHI A1-CPU NSFP A1CPU
Mitsubishi A0J2-E56DR PLC I/O Expansion Module FS AOJ2
Mitsubishi A0J2-E28DT PLC I/O Expansion Module FS
MITSUBISHI .A278LX MOTION CONTROLLER.XLT?.
Mint Juniper Netscreen NS-ISG-2000 Advanced w/ OS 6.3r10 Latest
Mint Juniper Netscreen NS-ISG-2000 Advanced OS 6.3r10 Latest
Minn Kota SW RT 80/EM Engine Mount Trolling Motor
Minn Kota Saltwater Engine Mounted Rt80em 24v 80lb 1370625
MINN KOTA SALTWATER ENGINE MOUNTED RT80EM 24V 80LB 1370625
MINN KOTA SALTWATER ENGINE MOUNTED RT80EM 24V 80LB 1370625
Minn Kota Saltwater Engine Mounted Rt55em 12v 55lb 1370615
MINN KOTA SALTWATER ENGINE MOUNTED RT55EM 12V 55LB 1370615
MINN KOTA SALTWATER ENGINE MOUNTED RT55EM 12V 55LB 1370615
MINN KOTA SALTWATER ENGINE MOUNTED RT160EM 24V 160LB
Minn Kota RT80EM Engine Mount Saltwater Trolling Motor 24v-80lb
Minn Kota RT80/EM Engine Mount Saltwater TROLLING MOTOR 80 Pound 24v 1370625
Minn Kota RT80/EM Engine Mount Saltwater Trolling Motor 24V-80lb 1370625
Minn Kota RT80/EM Engine Mount
Minn Kota RT55EM ENGINE MOUNT Saltwater TROLLING MOTOR
Minn Kota RT55/EM Engine Mount Saltwater Trolling Motor 12V-55lb 1370615
Minn Kota RT55/EM Engine Mount Saltwater Trolling Motor 12V-55lb 1370615
Minn Kota RT160/EM Engine Mount
Minn Kota MK80EM Freshwater Engine Mount Trolling Motor 24v-80lb
Minn Kota MK80EM Freshwater Engine Mount Trolling Motor
MINN KOTA MK55EM ENGINE MOUNTED 55LB THRUST 12V 1370610
MINN KOTA MK55EM ENGINE MOUNTED 55LB THRUST 12V 1370610
Minn Kota MK55/EM Engine Mount Freshwater Trolling Motor 12V-55lb 1370610
Minn Kota MK55/EM Engine Mount
Minn Kota MK101EM Freshwater Engine Mount Trolling Mtr
Minn Kota MK101EM Freshwater Engine Mount Trolling Motor 36v-101lb
Minn Kota MK101EM Freshwater Engine Mnt Trolling Motor WORLDWIDE SHIP 1370630
Minn Kota Mk101em Engine Mounted 101lb Thrust 36v 1370630
Minn Kota MK101/EM Engine Mount
Minn Kota FW MK80/EM Engine Mount Trolling Motor
Ming
MINCO CT15021 TEMPERATURE CONTROLLER 100-240VAC SSRALA
MILLER FLUID POWER APL4093101 USPP APL4093101
Millennia Media AD-596
Millennia AD-596 Analog-Digital Converter
MID S5 Google Android 2.2 7’ Touchscreen Tablet PC
MICROSTAR MSXB-017-03 I/0 BOARD MSXB01703 NIB 
Microsoft BASIC Professional Development System
Microseven EXView CCD18X High Speed Dome Wireless H.264 PTZ IP Camera Mac Ready
Microseven EXView CCD18X High Speed Dome Wireless H.264 PTZ IP Camera Mac Ready
Microseven EXView CCD 26X High Speed Dome Wireless H.264 PTZ IP Camera Mac Ready
MicroNet RAIDBank5 RB5-15000 DAS Hard Drive Array 5 x HDD Installed 15 TB In
Microfast Controls SMF-M1480-010 SMFM1480010 I/O Module Rack 
Microelettrica Scientifica mc30 Three-Phase Overcurrent and Earth Fault Relay 
Microbot TeachMover Robot Kits  Parts and Boards 
Micro Industries MVME605 I/O Module  No Box
Metasonix KV-100 AssBlaster Multi-Effects-?
MEMUSB-1024FT 1GB USB FLASH TOKEN
MEMOTEC 30033001-007 USPP 30033001007
MEM-NPE-G2-2GB for Cisco NPE-G2 Fast Ship w/wrnty
MEM-NPE-400-25?6MB 256MB MEMORY FOR CISCO NPE-400 7200 SERIES
MEM-CF-512MB 512MB FLASH MEMORY FOR CISCO 1900 2900 3900 ISR
MEM-CF-256MB 256MB COMPACT FLASH FOR CISCO 1900 2900 3900 ISR
MEM-CF-256MB 256MB COMPACT FLASH FOR CISCO 1900 2900 3900 ISR
MEM-CF-1GB 1GB COMPACT FLASH FOR CISCO 1900 2900 3900 ISR
MEM3800-512D 512MB DRAM MEMORY FOR CISCO 3825/3845
MEM3800-256D 256MB DRAM MEMORY FOR CISCO 3825/3845
MEM3800-128CF 128MB FLASH MEMORY FOR THE CISCO 3825/3845
MEM2800-64U256?CF 64 TO 256 MB CF UPGRADE FOR CISCO 2800 SERIES
MEM2600XM-32FS 32MB FLASH SIMM FOR CISCO 2600XM SERIES
MEM2600XM-16FS 16MB FLASH SIMM FOR CISCO 2600XM
MEM2600-32D 32 MB DRAM FOR CISCO 2600 SERIES
MEM-256M-AS54 256MB MAIN SDRAM FOR CISCO AS5400
MEM1700-64D 64MB DRAM DIMM FOR CISCO 1700 SERIES
MELSEC Mitsubishi A68AD Analogue Input Module 8 Channel Excellent Cond
Mellanox InfiniHost III Lx Infiniband MHGS18-XTC
MEDAR I/O MODULE 5305-B
MEASUREX 51304483-100 USPP 51304483100
Measurex 05331100 VFC 40 500k Honeywell 
Measurex 05331100 VFC 40 500k Honeywell 
Measurex 05331100 VFC 40 500k Honeywell 
Measurex 05329500  05329600 diagnostic break point 
Measurex 05319100 high density contact output buffer
Measurex 05312900 floppy interface Honeywell
Measurex 05312600 Send Receive Buffer SRB Honeywell
Measurex 05291202 Contact I/O Honeywell
Measurex 05291200 Contact I/O Honeywell
Measurex 05291000 Honeywell replaced  05367601
ME-3400G-2CS-A CISCO Multi-layer Ethernet Access Switch
ME-3400G-2CS-A CISCO Multi-layer Ethernet Access Switch
McIntosh MHT-100 A/V System Controller 
MC7090 Wireless Enterprise Digital Assistant MC7090-PK0DJRF?A7WR MC7090-PK0DJRF
MC7090 Wireless Enterprise Digital Assistant MC7090-PK0DJRF?A7WR 
MBD-X7DVL-L-O Motherboard Standard Retail Pack 
MAXXESS BLP 201 READER BOARD  QUAD OUTPUT MODULE WITH ENCLOSURE
MAXXESS BARLOCK 200 READER BOARD  QUAD OUTPUT MODULE WITH MOUNTING BRACKET
Marposs E4N LVDT Amplifier Module 2 Input E4NLVDT 
MARINE GPS NAVIGATION SYSTEM CAV-2000
MARINE GPS NAVIGATION SYSTEM CAV-1000
MARINE ELECTRO PROCESS MCB-16DIO/10.P?1 USPP MCB16DIO10P1
Marconi FORE Net Mod PN: NM-/622SMLRE 1YR 
Marconi FORE Net Mod PN: NM-/622SMIRLC 1YR 
MAN ROLAND 16.86926-0008 NSPP 16869260008
MAN ROLAND 16.86926-0008 NSFP 16869260008
Make offers ships to We buy OFF LEASE EQUIPMENT
Lynx TWO-C Soundcard  Free International 
Lynx Two-C 6 In 2 Out 192KHz AD/DA PCI Sound Card
Lynx Two-B 2 In 6 Out 192KHz AD/DA PCI Sound Card
Lynx Two-A 4 Analog I/O 192KHz AD/DA PCI Sound Card
Lynx Two-A 4 Analog I/O 192KHz AD/DA PCI Audio Interface
Lynx LynxTWO-C 192 kHz Multichannel Audio Reference
Lynx LynxTWO-B 192 kHz Multichannel Audio Reference
Lynx LynxTWO-A Multi-Channel Reference PCI Card 
Lynx LynxTWO-A 192 kHz Multichannel Audio Reference
Lynx LS-AES 8-Channel Expansion Soundcard Brand 
Lynx Aurora 8 D/A  A/D ConverterHD Card2 Lynx CablesWarra?nty
Lynx Aurora 16-VT HD with installed LT-HD interface
Lynx Aurora 16 D/A  A/D ConverterUSB Card4 Lynx CablesWarra?nty
Lynx Aurora 16 D/A  A/D ConverterHD Card4 Lynx CablesWarra?nty
LYNGSO MARINE IOM402 USPP IOM402
LUMBERG 0970-PSL-115 NSFP 0970PSL115
Lucent ica 89-0360-A DS-1 I/O Front module BA9IAA0AA
Lucent PSAX NS20N360KD 1250/2300 6-PORT ENHANCED
Lucent Excel VSE-BSU CPU I/O 16-span ESX-T1C T-One MIO 
LSI/3Ware 9750-4I 4-Port 6G/s PCI Express SAS RETAILBOX
LSI LSI00211 9280-24i4e SGL SAS 24 Int. 4 Ext. RAID 
LSI LSI00211 9280-24i4e SGL SAS 24 Int. 4 Ext. RAID 
LSI LSI00211 9280-24i4e SGL SAS 24 Int. 4 Ext. RAID 
LSI LSI00211 9280-24i4e SGL SAS 24 Int. 4 Ext. RAID 
LSI LSI00210 9280-16i4e SGL SAS 16 Int. 4 Ext. RAID
LSI LSI00210 9280-16i4e SGL SAS 16 Int. 4 Ext. RAID
LSI LSI00210 9280-16i4e SGL SAS 16 Int. 4 Ext. RAID
LSI LSI00210 9280-16i4e SGL SAS 16 Int. 4 Ext. RAID
LSI LSI00208 9260-16i SGL SAS 16 Internal Ports RAID
LSI LSI00208 9260-16i SGL SAS 16 Internal Ports RAID
LSI LSI00208 9260-16i SGL SAS 16 Internal Ports RAID
LSI LSI00208 9260-16i SGL SAS 16 Internal Ports RAID
LSI Logic SAS/SATA ESM RoHS I/O Module M101651 Engenio 24199-00 24198-00 
LSI Logic LSI00306 MegaRAID 9266-4i 4Port Internal 1GB SATA/SAS Controller Card 
LSI Logic LSI00306 MegaRAID 9266-4i 4Port Internal 1GB SATA/SAS Controller Card
LSI Logic LSI00306 MegaRAID 9266-4i 4Port Internal 1GB SATA/SAS Controller Card
LSI Logic LSI00306 MegaRAID 9266-4i 4Port Internal 1GB SATA/SAS Controller Card
LSI Logic LSI00305 MegaRAID 9266-4i 4Port Internal 1GB SATA/SAS Controller Card 
LSI Logic LSI00305 MegaRAID 9266-4i 4Port Internal 1GB SATA/SAS Controller Card
LSI Logic LSI00305 MegaRAID 9266-4i 4Port Internal 1GB SATA/SAS Controller Card
LSI Logic LSI00305 MegaRAID 9266-4i 4Port Internal 1GB SATA/SAS Controller Card
LSI Logic LSI00296 MegaRAID 9266-8i 8Port Internal 1GB SATA/SAS Controller Card 
LSI Logic LSI00296 MegaRAID 9266-8i 8Port Internal 1GB SATA/SAS Controller Card
LSI Logic LSI00296 MegaRAID 9266-8i 8Port Internal 1GB SATA/SAS Controller Card
LSI Logic LSI00296 MegaRAID 9266-8i 8Port Internal 1GB SATA/SAS Controller Card
LSI Logic LSI00282 MegaRAID 8-port 9260CV-8i SAS RAID Controller
LSI Logic LSI00282 MegaRAID 8-port 9260CV-8i SAS RAID Controller
LSI Logic LSI00282 MegaRAID 8-port 9260CV-8i SAS RAID Controller
LSI Logic LSI00282 MegaRAID 8-port 9260CV-8i SAS RAID Controller
LSI Logic LSI00280 MegaRAID 4-port 9260CV-4i SAS RAID Controller
LSI Logic LSI00280 MegaRAID 4-port 9260CV-4i SAS RAID Controller
LSI LOGIC LSI00187 Megaraid SAS 8708EM2 8PORT 256MB 3GB S SATA controller card
LSI LOGIC LSI00187 Megaraid SAS 8708EM2 8PORT 256MB 3GB S SATA controller card
LSI LOGIC LSI00187 Megaraid SAS 8708EM2 8PORT 256MB 3GB S SATA controller card
LSI LOGIC LSI00187 Megaraid SAS 8708EM2 8PORT 256MB 3GB S SATA controller card
LSI 3ware SAS 9750-24i4e PCIe 2.0 8X 6Gbps per channel
LSI 3ware SAS 9750-24i4e PCIe 2.0 8X 6Gbps per channel
LS INDUSTRIAL SYSTEMS G4Q-TR4A USPP G4QTR4A
Loughborough Sound Images LSI DBV44 VME MVME
78 OPTO 22 IAC5 I/O MODULE IAC5 OPTO 22 IAC5
5 HP Compaq 6000 Pro SFF Desktop PC/Dual Core 2.8GHz/8G DDR3/Windows7 Pro
5 HP Compaq 6000 Pro SFF Desktop PC/Core 2 Duo E7200 2.53GHz/8G/Win?dows 7
5 Allen Bradley 1746-OW16 /C 1746-0W16 Relay Output 
3 allen bradley 1785-ka3 1785-enet 1771-asb c
2 HP Compaq 6000 Pro SFF Desktop PC/Dual Core 2.8GHz/8G DDR3/Windows7 Pro
2 HP Compaq 6000 Pro SFF Desktop PC/Core 2 Duo E7200 2.53GHz/8G/Win?dows 7
2 ALLEN BRADLEY 1794-IB16 /A FLEXLOGIC INPUT MODULE
10 Allen Bradley 1734-OB4E /C 1734-0B4E 24VDC Output Modules
 for Cisco WS-SUP720-3B 720 Supervisor Engine Grade A 
 Allen Bradley SLC 500 Analog Combination I/O 1746-NIO4V Ser A 
 10x ASUS P4SDX SIS655 P4 Motherboard 478 DDR333
Longline GLC-LH-SM for CISCO GE SFPLC CONNECTOR LX/LH TRANSCEIVER
Logic Control LM3016E 
LNC 2009 Mfg date 1794-IF4I Allen Bradley Flex I/O Analog Input 1794IF4I N250
LNC 2009 mfg date 1794-IF4I Allen Bradley Flex I/O 1794IF4I N814
LNC 11/2011 mfg 1746-NI8 frn 2 Allen Bradley SLC 500 Analog 1746NI8 N912
Like No Box.
Lifetime Manufacturer  ships same 
Lian-Li PC-X2000FB Black Aluminium Full Tower Chassis
Lian-Li PC-X2000FB Black Aluminium Full Tower Chassis
Lian-Li PC-X2000FB Black Aluminium Full Tower Chassis
Lian-Li PC-X2000FB Black Aluminium Full Tower Chassis
LG INDUSTRIAL SYSTEMS GDL-TR4C1 NSFP GDLTR4C1
LG INDUSTRIAL SYSTEMS GDL-TR2C1 NSFP GDLTR2C1
LG INDUSTRIAL SYSTEMS GDL-D24C NSFP GDLD24C
LEXICON digital effects processor MX-300 BRAND 
Lenovo ThinkStation S20 Workstation XEON W3503 2.4GHz
Lenovo ThinkStation E31 2555 Xeon E3-1225V2 3.2 GHz Brand 
Lenovo ThinkStation D20 4105 Workstation PC In Xeon 3.06GHz 4GB 500GB HDD 
Lenovo ThinkStation D20 4105 Workstation PC In Xeon 3.06GHz 4GB 500GB HDD 
Lenovo ThinkStation 782457U WorkstationXe?on 3.3GHz4G500G?BQuadro 2000W7Pro
Lenovo ThinkStation 782457F WorkstationXe?on 3.3GHz4G500G?BQuadro 2000W7Pro
Lenovo ThinkStation 4105O3U W3550 3.06GHz 4GB 500GB Windows 7 Raven Black 
Lenovo ThinkStation 4105O3U W3550 3.06GHz 4GB 500GB Windows 7 Raven Black 
Lenovo ThinkStation 4105O3U W3550 3.06GHz 4GB 500GB Windows 7 Raven Black
Lenovo ThinkStation 4105O3U W3550 3.06GHz 4GB 500GB Windows 7 Raven Black
Lenovo ThinkStation 4105O3U W3550 3.06GHz 4GB 500GB Windows 7 Raven Black
Lenovo ThinkStation 4105O3U W3550 3.06GHz 4GB 500GB Windows 7 Raven Black
Lenovo ThinkStation 4105O3U W3550 3.06GHz 4GB 500GB Windows 7 Raven Black
Lenovo ThinkStation 4105O3U W3550 3.06GHz 4GB 500GB Windows 7 Raven Black
Lenovo ThinkPad X230 Laptop i5-3320M 4GB RAM 500G HDD W7P DVDRW 232036U
Lenovo ThinkPad X230 Laptop i5-3320M 4GB RAM 500G HDD W7P 12.5" W7P 232036F
Lenovo ThinkPad X230 Laptop i5-3320M 4GB RAM 500G HDD W7P 12.5" 343522U
Lenovo ThinkPad X230 Laptop i5-3210M 4GB RAM 500G HDD W7P DVDRW 12.5" 232032U
Lenovo ThinkPad X230 34352TU 12.5" LED Tablet PC Core i7 i7-3520M 2.9GHz Bla
Lenovo ThinkPad X230 343522U 12.5" LED Tablet PC Core i5 i5-3320M 2.6GHz Bla
Lenovo ThinkPad X220T i5-2520M 4GB 320G W7P 12.5"
Lenovo ThinkPad X220 Tablet 4296 Core i7 2.8GHz 128GB SSD 42963UU 12in
Lenovo ThinkPad X220 Laptop In i5-2450M 4GB RAM 320G W7P 12.5" W7P 42875TU
Lenovo ThinkPad X220 Laptop i7-2640M 4GB RAM 128G SSD 12.5" W7P 428767U
Lenovo ThinkPad X220 Laptop i7-2640M 4GB 128G SSD 12.5" W7P 428757U
Lenovo ThinkPad X220 Laptop i5-2520M 4GB 320G 42872WU
Lenovo ThinkPad X220 Laptop i5-2450M 4GB RAM 320G HDD W7P 12.5" 42875TF
Lenovo ThinkPad X220 Core i7-2640M/4GB/1?28GB SSD/12.5"/Webc?am/Win7 428757U
Lenovo ThinkPad X220 Core i7-2640M/4GB/1?28GB SSD/12.5"/Webc?am/Win7 428757U
Lenovo ThinkPad X220 42962WU 12.5" LED Tablet PC Core i5 i5-2520M 2.5GHz BLK
Lenovo ThinkPad X220 42962WU 12.5" LED Tablet PC Core i5 i5-2520M 2.5GHz Bla
Lenovo ThinkPad X220 4290 429034U 2.5GHz Core i5 2520M 320GB Laptop
Lenovo ThinkPad X220 428767U 12.5" LED Notebook Core i7 i7-2640M 2.80GHz Bla
Lenovo ThinkPad X220 428743U 12.5" LED Notebook Core i5 i5-2430M 2.4GHz Blac
Lenovo ThinkPad X220 428742U 12.5" LED Notebook Finger Print Reader Bluetooth
Lenovo ThinkPad X220 42872WU 12.5" LED Notebook 320GB HDD Bluetooth Webcam 9.2Hr
Lenovo ThinkPad X220 4287 In Core i7 2640M 2.8GHz 128GB SSD Laptop
Lenovo ThinkPad X201 3113ED9 12.1" LED Tablet PC 
Lenovo ThinkPad W520 Laptop i7-2860QM 8GB RAM 500G HDD W7P DVDRW 15.6" 42763LU
Lenovo ThinkPad W520 Laptop i7-2760QM 8GB RAM 500GB HD W7P 15.6" DVDRW 42763JU
Lenovo ThinkPad W520 Laptop i7-2760QM 8GB RAM 500G HDD 15.6" DVDRW 42763JF
Lenovo ThinkPad W520 42763LU 15.6" LED Notebook Core i7 i7-2860QM 2.50GHz PN 
Lenovo ThinkPad W520 42763LU 15.6" LED i7-2860QM 2.50GHz 8GB 500GB Windows 7
Lenovo ThinkPad W520 42763LU 15.6" LED i7-2860QM 2.50GHz 8GB 500GB Windows 7
Lenovo ThinkPad W520 42763LU 15.6" LED i7-2860QM 2.50GHz 8GB 500GB Windows 7
Lenovo ThinkPad W520 42763LU 15.6" LED i7-2860QM 2.50GHz 8GB 500GB Windows 7
Lenovo ThinkPad W520 42763JU 15.6" LED Notebook Core i7 i7-2760QM 2.4GHz PN 4
Lenovo ThinkPad W520 42763JU 15.6" LED Notebook 500GB HDD 8GB RAM 10.8Hr Bat 
Lenovo ThinkPad W520 42763JF 15.6" LED Notebook 500GB HDD 8GB RAM 10.8Hr Bat 
Lenovo ThinkPad W500 WORKSTATION  ISV CERTIFICATIONS 
Lenovo ThinkPad T530 Laptop i7-3520M 4GB RAM 500G HDD W7P 15.6" NVS 5400M DVDRW
Lenovo ThinkPad T530 Laptop i5-3320M 4GB RAM 500G HDD W7P DVDRW 239242U
Lenovo ThinkPad T530 Laptop i5-3320M 4GB RAM 500G HDD W7P DVDRW 15.6" 239245U NV
Lenovo ThinkPad T530 239245U 15.6" LED Notebook Core i5 i5-3320M 2.6GHz Blac
Lenovo ThinkPad T530 239242U 15.6" LED Notebook Core i5 i5-3320M 2.6GHz Blac
Lenovo ThinkPad T530 239242U 15.6" i5-3320M 2.6GHz 4GB 500GB Windows 7 
Lenovo ThinkPad T530 239242U 15.6" i5-3320M 2.6GHz 4GB 500GB Windows 7
Lenovo ThinkPad T530 239242U 15.6" i5-3320M 2.6GHz 4GB 500GB Windows 7
Lenovo ThinkPad T520 Laptop i5-2540M 4GB RAM 128G SSD W7P 15.6" DVDRW 424053U
Lenovo ThinkPad T520 Laptop i5-2450M 4GB RAM 320G HDD 15.6" DVDRW W7P 42395CU
Lenovo ThinkPad T520 Laptop i5-2450M 4GB 320G W7P DVDRW W7P 15.6" 42395CF
Lenovo ThinkPad T520 42406MU 15.6" LED Notebook 500GB HDD 4GB RAM 14Hr Bat 
Lenovo ThinkPad T520 42404AF 15.6" LED Notebook Core i5 Bluetooth DisplayPort
Lenovo ThinkPad T520 42404AF 15.6" LED Notebook Core i5 Bluetooth DisplayPort
Lenovo ThinkPad T520 42395CF 15.6" LED Notebook 320GB HDD Bluetooth Webcam 7.7Hr
Lenovo ThinkPad T520 423946U 15.6" LED Notebook Core i5 i5-2520M 2.5GHz Blac
Lenovo ThinkPad T520 423946U 15.6" LED Notebook 320GB HDD Bluetooth Webcam 7.7Hr
Lenovo ThinkPad T520 423946U 15.6" i5-2520M 4GB 320GB
Lenovo ThinkPad T520 423946U 15.6" i5-2520M 4GB 320GB
Lenovo ThinkPad T520 423946U 15.6" i5-2520M 4GB 320GB
Lenovo ThinkPad T520 423946U 15.6" i5-2520M 4GB 320GB
Lenovo ThinkPad T520 423946F 15.6" LED Notebook 4GB RAM 7.7Hr Bat Bluetooth 
Lenovo ThinkPad T430S Laptop i5-3210M 4GB RAM 500G HDD W7P DVDRW 14" NV 23535UU
Lenovo ThinkPad T430S Laptop i5-3210M 4GB RAM 500G HDD W7P DVDRW 14" NV 23535UU
Lenovo ThinkPad T430S Laptop i5-3210M 4GB RAM 500G HDD W7P DVDRW 14" NV 23535UF
Lenovo ThinkPad T430S Laptop i5-3210M 4GB RAM 500G HDD W7P DVDRW 14" NV 23535UF
Lenovo ThinkPad T430s 23535UU 14" LED Notebook Core i5 i5-3210M 2.5GHz Black
Lenovo ThinkPad T430 Laptop i7-3520M 4GB RAM 500G HDD DVDRW W7P 14" 23445PU
Lenovo ThinkPad T430 Laptop i5-3320M 4GB RAM 500G HDD W7P 14" DVDRW 23445GU
Lenovo ThinkPad T430 Laptop i5-3320M 4GB RAM 500G HDD W7P 14" DVDRW 23442HF
Lenovo ThinkPad T430 23445GU 14" LED Notebook Core i5 i5-3320M 2.6GHz Black 
Lenovo ThinkPad T430 2344-2HU 14" LED Notebook Core i5 i5-3320M 2.6GHz Black
Lenovo ThinkPad T420S Laptop i5-2540M 128GB SSD 417153F
Lenovo ThinkPad T420s 417152F 14" LED Notebook 320GB HDD Webcam Bluetooth 5.5Hr 
Lenovo ThinkPad T420s 4171 Core i7 2.8GHz 41717FU 14in W7pro 160GB SSD
Lenovo ThinkPad T420 Laptop i5-2520M 4GB RAM 320G HD W7P DVDRW 14" 4177Q5F
Lenovo ThinkPad T420 Laptop i5-2520M 4GB 320G W7P DVDRW 14" 4177Q5U
Lenovo ThinkPad T420 Laptop i5-2450M 4GB RAM 320G HD DVDRW W7P 14" 4177RVU
Lenovo ThinkPad T420 4236X08 14" LED Notebook Core i3 i3-2350M 2.3GHz Black 
Lenovo ThinkPad T420 4236X08 14" i3-2350M 2.3GHz 4GB 320GB Windows 7 Black
Lenovo ThinkPad T420 4236X08 14" i3-2350M 2.3GHz 4GB 320GB Windows 7 Black
Lenovo ThinkPad T420 4236X08 14" i3-2350M 2.3GHz 4GB 320GB Windows 7 Black
Lenovo ThinkPad T420 4178C9F 14" LED Notebook 500GB HDD Bluetooth Webcam 9Hr Bat
Lenovo ThinkPad T420 41786UU 14" LED Notebook Core i5 i5-2520M 2.50GHz Black
Lenovo ThinkPad T420 41786UU 14" LED Notebook Core i5 i5-2520M 2.50GHz Black
Lenovo ThinkPad T420 41786UF 14" LED Notebook 500GB HDD 9HR Bat Webcam Bluetooth
Lenovo ThinkPad T420 4178 In Core i5 2520M 2.5GHz 160GB SSD Laptop
Lenovo ThinkPad T420 4177X07 14" LED Notebook Core i3 i3-2310M 2.1GHz Black 
Lenovo ThinkPad T420 4177X07 14" i3-2310M 2.1GHz 4GB 320GB Windows 7
Lenovo ThinkPad T420 4177X07 14" i3-2310M 2.1GHz 4GB 320GB Windows 7
Lenovo ThinkPad T420 4177X05 14" LED Notebook Core i3 i3-2310M 2.1GHz Black 
Lenovo ThinkPad T420 4177X01 14" LED Notebook Core i3 i3-2310M 2.10GHz Black
Lenovo ThinkPad T420 4177X01 14" i3-2310M 2.10GHz 4GB 320GB Windows 7 Black
Lenovo ThinkPad T420 4177X01 14" i3-2310M 2.10GHz 4GB 320GB Windows 7 Black
Lenovo ThinkPad T420 4177X01 14" i3-2310M 2.10GHz 4GB 320GB Windows 7 Black
Lenovo ThinkPad T420 4177RVU 14" LED Notebook i5-2450M 2.50GHz Bluetooth Webcam
Lenovo ThinkPad T420 4177RVF 14" LED Notebook 320GB HDD Webcam 9HR Bat Bluetooth
Lenovo ThinkPad T420 4177RVF 14" LED Notebook 320GB HDD Webcam 9HR Bat Bluetooth
Lenovo ThinkPad T420 4177Q5U 14" LED Notebook Black Core i5 Webcam DisplayPort
Lenovo ThinkPad T420 4177Q5U 14" LED Notebook 320GB HDD 9HR Bat DisplayPort 
Lenovo ThinkPad T420 4177 In Core i5 2430M 2.4GHz 4GB 320GB 14in
Lenovo ThinkPad T410 2522KJU 14.1" LED Notebook Core i5 i5-540M 2.53GHz Blac
Lenovo ThinkPad L520 Laptop i5-2520M 4GB 320G 786035U
Lenovo ThinkPad L520 Laptop i5-2520M 4GB 320G 786035F
Lenovo ThinkPad L412 058542U 14" LED Notebook Core i5 i5-520M 2.4GHz Black 
Lenovo ThinkCentre M91P 7052 Desktop In i7 Quad Core 3.4GHz 4GB DDR3 1TB 
Lenovo ThinkCentre M81 7518D4U Desktop i3-2130 3.4GHz 4GB 320GB Windows 7 Black
Lenovo ThinkCentre M81 7518D4U Desktop i3-2130 3.4GHz 4GB 320GB Windows 7 Black
Lenovo ThinkCentre M81 7518D4U Desktop i3-2130 3.4GHz 4GB 320GB Windows 7 Black
Lenovo ThinkCentre M81 7518D4U Desktop i3-2130 3.4GHz 4GB 320GB Windows 7 Black
Lenovo ThinkCentre M81 7517B1U Desktop i3-2130 3.4GHz 4GB 320GB Windows 7
Lenovo ThinkCentre M81 7517B1U Desktop i3-2130 3.4GHz 4GB 320GB Windows 7
Lenovo ThinkCentre M81 7517B1U Desktop i3-2130 3.4GHz 4GB 320GB Windows 7
Lenovo ThinkCentre M81 7517B1U Desktop i3-2130 3.4GHz 4GB 320GB Windows 7
Lenovo M91p 7052C9U Desktop PCi7-26004GB?1TBHD2000W7?Pro
Lenovo M91p 7052C9F Bilingual Desktop PCi7-26004GB?1TBHD2000W7?Pro
Lenovo M91p 7052C2U Desktop PCi5-24004GB?250GBHD2000?W7Pro
Lenovo M91p 7052B9U Desktop PCi7-26004GB?500GBHD6450?W7Pro
Lenovo M91p 7052B9U Desktop PCi7-26004GB?500GBHD6450?W7Pro
Lenovo M91p 7052B2U Desktop PCi7-26004GB?500GBW7Pro
Lenovo M91p 7052B2F Bilingual Desktop PCi7-26004GB?500GBW7Pro
Lenovo M91p 4480C2F Bilingual Desktop PCi7-26004GB?1TBW7Pro
Lenovo M91p 4480B9U Desktop PCi5-24004GB?250GB W7Pro
Lenovo M91p 4480B3U Desktop w/i7-2600 4GB 500GB W7Pro
Lenovo M91p 4480B3FBiling?ual Desktop w/i7-2600 4GB 500GB W7Pro
Lenovo M81 7518E1U Desktop PCi5-24004GB?500GBW7Pro
Lenovo M81 7518D7U Desktop PCi3-21204GB?250GBW7Pro
Lenovo M81 7518D4U Desktop PCi3-21304GB?320GBW7Pro
Lenovo M81 7518D4F Bilingual Desktop PCi3-21304GB?320GBW7Pro
Lenovo M81 7517C1U Desktop PCi5-24004GB?500GBHD2000?W7Pro
Lenovo M81 7517C1F Bilingual Desktop PCi5-24004GB?500GBHD2000?W7Pro
Lenovo M81 7517B1U Desktop PCi3-21304GB?320GBHD2000?W7Pro
Lenovo M81 7517B1F Bilingual Desktop PCi3-21304GB?320GBHD2000?W7Pro
Lenovo 833214U 6 TB 2U Rack-mountable Secure Managed Client Network Storage
LEEDS  NORTHRUP 074429 NSPP 074429
Lavry 4496-12 2 Channel ADC  2 Channel DAC Converter
LATEST Revision R3.0 SuperMicro PDSME Bulk Pack MB FULL MFR 
LATEST Rev R2.01a?SuperMicro H8DME-2 Bulk Pack MB FULL MFR 
LATEST Rev R2.01 SuperMicro H8DAR-T Bulk Pack MB FULL MFR 
LATEST Rev R1.1 SuperMicro X6DHR-IG2 Bulk Pack MB FULL MFR 
LATEST Rev R1.02 SuperMicro H8QMI-2 Bulk Pack MB FULL MFR 
LATEST Rev R1.01 SuperMicro X7DWU Motherboard FULL MFR 
LASER PARALLEL/USB HP P3005X WITH NETWORK DUPLEXER AND ADDITIONAL 500 Q7816A 
Landis A121836 I/O Module Base A120276  No Box
LANDIS  GYR 549-210 NSFP 549210
LANDIS  GYR 549-209 USPP 549209
L5201-2-02 SSD Analog I/O Module Diff Link L5201202 In Excellent Condition
Krauss Maffei TE500 Control Board TE-500 5089390 
Krauss Maffei SR501 Control Board SR-501 5089435 
Krauss Maffei DT100 AE1 LS Control Board DT-100 
KRAUSS MAFFEI CORP. 5088020 IO 502 CARD
Krauss Maffei 5080188 CPU Board MC2/MC3 
Koyo Direct Logic PLC Rack w/ CPU  Touchscreen 3498
Koyo Direct Logic 6 D0-06DD1 I/O Module DC Micro PLC 
KOYO Automation Direct Logic DL205 with D2-240 F2-04AD-2 D2-16ND3-2 and D2-08TRS
Koyo Automation Direct Logic 205 D2-250 F2-02DA-2 D2-16NA D2-12TA D2-06B TESTED
Korg M3 73 73-key Workstation/Sa?mpler Keyboard
Korg M3 61 61-key Workstation/Sa?mpler Keyboard
Korg Electribe ESX1SD with Built-in SD Card  
KONTRON CTM80-2 REAR I/O T6701AC FOR DT64/CP6010/CP?6000
KONGSBERG RAI-16 USPP RAI16
KONGSBERG RAI-16 USPP RAI16
KONGSBERG NN-791/HER-100?261H USPP NN791HER100261?H
KONGSBERG 6200263 USPP 6200263
Knight Rider 7 Inch Android 2.3 Car DVD with 3G Internet.
Kloehn Syringe V6 VersaPump Pump 26044
KLOEHN CO. LTD V8 Multi-Channel Syringe Pump 250ml standard syringe
KLOCKNER MOELLER EM4-101-AA2 USPP EM4101AA2
KLOCKNER MOELLER EM4-101-AA1 USPP EM4101AA1
Kingston/StorC?ase Data Silo DS500 9-Bay/Hard Drive Ultra-SCSI RAID Storage Tower
Kikusui KSG4310 FM/AM Stereo Signal Generator
Keyence PLC Controller KV-16R and 2 I/O Modules KV-8ER Nice Shape
KEYENCE CORP KL32CT USPP KL32CT
KET KAT-SP COUNTER CONTROL ASSEMBLY W PUSH TO LIGHTSW
KEP SCPTHMS16P3C5D?1A 6 DIGIT LED COUNTER W PRESET 110VA
Kensington 4000A 5-Axis Controller Compley Optioned
Keithley MSSR-32 BD PC6432 Rev A Circuit Board Module
Just add your E7-4800 processor IN Like condition
Juniper SSG-5-SH Juniper Secure Services Gateways 
Juniper SSG-550-001 Secure Services Gateway 550
Juniper SSG-20-SH-W Juniper Secure Services Gateway 20 1 Year Wtny
Juniper SRX5K-4XGE-XFP 4x10 Gigabit XFP Ethernet I/O  COUIAUFBAD
Juniper SRX5800 Firewall SRX5800BASE-DC 150Gbps Security Gateway Free Ship
Juniper SRP-5G 5-Gbps switch fab Mod ERX-5ECC-SRP ERX 
Juniper OC3-4SM_I/O 4Port SM IOA for OC3/OC12-ATM ERX-OCXA256M-M?OD OC3/OC12-POS
Juniper OC12-SM_I/O ERX 1-Port OC12STM4 SM I/O 90 Hardware  Free Ship
Juniper NS-ISG-TX2 2prt 10/100/1000TX Ethernet ISG-2000 90  Hardware 
Juniper NS-ISG-SX2 ISG I/O Module two Port Mini GBIC-SX Free Overnight Ship
Juniper NS-ISG-SX2 ISG I/O Module two Port Mini GBIC-SX 
Juniper NS-ISG-LX4 4-Port I/O Module ISG-2000 ISG-1000 90   Free Ship
Juniper NS-ISG-FE8 8 Port 100bT for ISG-1000 ISG-2000 90  Hardware 
Juniper NS-ISG-2000 NS-ISG-SX2 NS-ISG-FE8 90   
Juniper NS-ISG-2000 Firewall NS-ISG-TX4 NS-ISG-1XG AC 90   Free Ship
Juniper NS-ISG-1XG ISG1000 and ISG2000 I/O Module 1-port 10GB 1 YEAR 
Juniper NS-500-SK1 FirewallVPN Netscreen 500 Adv  90  
Juniper NS-500-HG1-SX NS-500 Single Port SX Module 90   Free Ship
Juniper Networks SRX-SFP-1GE-LX SFP Wired Transceiver Module for SRX 5000
Juniper Netscreen NS-ISG-1XG 10G for ISG-1000 ISG-2000 90   Free Ship
Juniper Netscreen NS-500-HG2-SX 2 port GBIC module
Juniper Netscreen ISG 2000 2-Port I/O Module GB2-TX NS-ISG-TX2
Juniper ISG-2000 Advanced Model NS-ISG-2000-DC 5.4.0r10.0 90  Warr Free Ship
Juniper FE-8_I/O 8 Port 10/100TX Rear Interface 90   
Juniper ES2-SRP-IOA E120 E320 BSR Switch Route Processor Input Output Adapter
Juniper ES2-GE8S1-IOA E320 half-height 8-port GE IOA 
Juniper ES2-10GES2-IOA 2 10-Gig Ethernet ports 1-active 1 standby E320 E120
Juniper ERX-GEFE256M-M?OD 1-port GE or 8-port 10/100 FE 90  Hardware  
Juniper ERX-8GEHDE-IOA Works with ERX-HDE-MOD line module 8 Port GE IOA
Juniper ERX-700 705 710 Edge Router SRP-5 90   
Juniper ERX-310 Router EX3-310DC1G-SY?S ERX-GEFE256M-M?OD 90  Free Ship