名称:无刷电机控制器ML4425/4426的应用
摘要：ML4425/4426是MicroLinear公司推出的一种智能型无刷电机控制器专用电路。该电路能提供起动和控制Δ和Y绕组、无刷电机的速度、换向所需的所有功能。文中介绍了ML4425/4426的特点、引脚功能、运行原理以及典型应用电路，并给出了一个完整的高电压电机的驱动电路。
关键词：无刷电机换向速度控制 ML4425/4426
1功能特点
ML4425/4426是Micro Linear公司推出的智能型无刷电机专用控制器，可用于为三相无刷电机提供封闭回路的换向控制信号，同时利用PWM模式还可对电机速度进行控制并对电机进行必要的保护。ML4425/4426的特点如下：
●可进行简单的变速控制；
●所有重要电流均由一个单独的外接电阻器决定，设置比较简单；
●电机起动和停止可以利用电路的电源完成；
●起动定时序列由两个电容器完成；
●可独立运行控制功能，且外围电路简单；
●采用了新的反电势换向技术，能提供最小的无抖动转矩；
●可进行最大效率的PW控制；
●具有换和PLC,可有效抑制PWM尖峰噪声信号。
2引脚功能
ML4425/4426由压控振荡器（VCO），PWM速度控制器、高端栅极驱动器、低端栅极驱动器、PWM电流控制器、换向控制器、反馈取样电路以及电源显示等部分构成。
ML4425/4426采用28脚SOIC和32脚TQFP两种封装形式，为28脚SOIC封装的引脚排列，各引脚的功能说明如下：
脚1：（ISENSE）：电机电流感应输入端。此脚接大约0.5V信号时，可产生ILIMIT。
脚2～4(P1～P3)：分别用于驱动外部P通道功率器件以驱动电机PH1、PH2、PH3。
脚5（RCPWM）：内部Gn放大器外接阻容网络连接端。此脚连接的阻容元件与其他部件一起决定速度回路的零极点。
脚6（Cosc）：PWM振荡器定时电容连接端。此端所连电容器决定PWM振荡器的频率。使用1nF电容时，PWM振荡器的振荡频率约为25kHz。
脚7（VREF）：参考电压输出端，用于为速度设计提供参考。
脚8（VSPEED）：速度控制输入端。此端的电压可用于控制速度回路中的放大器，以达到控制电机速度的目的。
脚9～（N1～N3）：驱动输出。分别用于驱动外部三个N沟道MOSFET功率器件以驱动电机的PH1、PH2、PH3。
脚12（ILIMIT）：ISENSE阈值控制端。改变此端电压可降低内部的阈值设置电压。
脚13（VCO）：压控振荡器输出端。
脚14(Vcc)：电源。
脚15（CCVO）：VCO定时电容连接端。
脚16（RVCO）：VCO电流设置端。使用时应外接一电阻（一般RVCO取80kΩ）。
脚17（CRST）：复位端。此脚为地电位时，器件处于复位状态。
脚18（VFLT）：电源状态显示输出。此脚为“0”时，表示电源处于低电平；为“1”时，表示电源处于高电压状态。
脚19（CEN）：斜波保持电容连接端。
脚20（RCVCO）：VCO回路滤波器件接入端。应用时此脚外接阻容元件。
脚21（CRAMP）：斜升速度给定电容连接端。
脚22～24（PH1～PH3）：三个电机端点的连接端。
脚25（BTAKE）：制动状态控制端。此脚为“0”电位时，电机处于制动状态。
脚26（Cos）：外部电容连接端。
脚27（RREF）：多电流设定电阻连接端。所有重要电流的设定均由此端所连的电阻决定。
脚28（GND）：信号及功率公共地。
3工作原理
ML4425/4426无刷电机控制器的内部结构及运行原理图。下面从起动、运行、制动等三个方面对LM4425/4426的工作原理进行说明。
3.1起动
一般电机的起动分校准、斜升、运转几个阶段。校准是为了使电机处于复位状态。
当ML4425/4426的17脚电位达到1.5V时，CEN脚开始充电。此时，ML4425/4426将以0.5μA的电流向RCVCO充电，这使得VCO的频率开始斜升，直到CEN引脚达到1.5V为止。这一过程称为斜升。
在器件的CEN电位斜升到1.5V后，设备即使用电机的BEMF并开始闭环运行。
3.2运行
当CEN（脚19）电位超过1.5V时，电机进入运行模式。此时电机速度应高到足以产生可探测到的BEMF，并允许闭环回路运行开始。
当RCVCO（脚20）上的电位小于VSPEED（脚8）电位时，电机将继续加速。在此期间，电机将受到由ILIMIT限制的N型通道的驱动。当RCVCO（脚20）的电位接近VSPEED（脚8）电位时，CPWM开始充电，并通过在Cosc(脚6)产生的25kHz的PWM锯齿波设定一个补偿电平，以控制通向N型通道的功率驱动器。
3.3制动
当25脚（制动引脚）电位被拉低时，后有三个N通道驱动管都被接通，三个P通道驱动管都被切断，这样即可实现制动功能。
4应用
4.1典型电路
ML4425/4426的典型外围元件的连接方法亦可参见图2所示。对不同的使用，有些外围元件的值应作相应调整。
4.2高电压电机驱动电路
以ML4425/4426为核心构成的驱动高电压电机的实际电路。该电路中外接的功率驱动电路由六只大功率MOS场效应管和三块 IR2118前级驱动芯片组成，该电路可以驱动电机的正转、反转和制动等。电路中没有使用霍尔传感器，而是用R13～R15的电压降作为信号反馈（这是该电路的特殊点）来控制电机恒速运转。调节R20可以改变电机的运转速度。S1为正、反转控制开关，S2为起动/制动控制开关。
如果驱动较低电压的电机（如24～80V），则可将三块 IR2118省去而直接由六只大功率MOSFET来驱动，这样可以降低电路成本。

◆ 企业名称：厦门兴润星贸易有限公司

◆ 企业性质： 有限责任公司

◆ 主营业务：DCS,PLC

◆ 经营模式： 贸易

◆ 贸易地区： 全国

◆ 联系人:阳先生

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DURABOOK D14RM RUGGED LAPTOP 2.53GHZ 4GB 500GB WIN7-ULT64  RECOVERY 90 WARR
DUAL OS TWINHEAD DURABOOK D15TS RUGGED LAPTOP 2GHZ 2GB 160GB W7XPPRO 90 WARR
DUAL CORE E6500 3.9GHz OCED GAMING PC w/NVIDIA GT220 1G
DST1-MRD08SL-1 Omron STI PLC Box Safety I/O DST1MRD08SL1
DST1-MD16SL-1 Omron STI PLC Box Safety I/O DST1MD16SL1
DS161 4061 Movie Substrobe Only by Ikelite
DRT2-TS04T Omron PLC Devicenet 4 Pt Thermocouple Input DRT2TS04T
DRT2-OD16 Omron PLC Devicenet Output DRT2OD16
DRT2-MD32SL Omron PLC Box Devicenet I/O DRT2MD32SL
DRT2-MD16TA Omron PLC Box Devicenet I/O DRT2MD16TA
DRT1-OD08CL Omron PLC Devicenet DRT1OD08CL
DRT1-ID32ML-1 Omron PLC Devicenet DRT1ID32ML1
DRT1-ID32ML Omron PLC Devicenet DRT1ID32ML
DRT1-HD16C Omron PLC Devicenet DRT1HD16C
DRT1-COM Omron PLC Devicenet Port DRT1COM
Dot Hill Systems Channel Host I/O GBIC Module SP-FHM-02 Rev. A7 60-00000024
DOLD TE-3143.68 USPP TE314368
DOBOY REORDER 393135 SBF FEEDER CONTROL MODULE DRIVE PCB I/O
DNS Screen Dainippon Detection Concentration Monitor Kondoh Kohsaya Detector
DMX Merger  Splitter w/ 4 Out Modular Chassis optional Send/Receive Analyzer
Discrete I/O Module 63871-001 A RSM
DIS CI9005 CONFERENCE IR-TRANSMITTER
Direct Logic D4-440 CPU with Rack
DIRECT LOGIC 405RS REMOTE I/O RACK WITH MODULES
DIRECT LOGIC 405RS REMOTE I/O RACK WITH MODULES
DIRECT LOGIC 06 KOYO D0-06DR-D PLC
Digital 488/80A IEEE 488 Digital interface IOTECH
Digidesign Transfuser Virtual Instrument Software
Digidesign Transfuser Virtual Instrument Software
Digidesign Transfuser Loop and Groove Creation Workstation
Digidesign Digi 003 Factory Pro Tools LE Workstation
Digidesign 002 Rack
DIGI ConnectPort X5 ZB 1XRTT Sprint Authorized Dealer Full
Digi 301-1002-98 Edgeport/8s MEI RS-232/422/485 8 DB-9 ports/USB Convertor.
DIAMOND-MM-32x-AT Analog I/O PC/104 Module w/ Advanced Automatic Autocalibrate
DIAMOND ELECTRONICS ONYX-MM-V3 NSPP ONYXMMV3
DGS-6600-48S D-Link DGS-6600-48S Switching Module 48 x SFP mini-GBIC
Desktop USB Tethered UHF RFID Reader Accessory Module 850-960MHz
Delta Tau Turbo UMAC 240Mhz 4ch 16bitAnalog 4axis 24In 24Out Power Supply
DELL TOWER T710 SERVER 8X 3.5" SIX CORE XEON 2.26GHZ L5640 36GB DRAC6 RAID PERC6
DELL TOWER T610 SERVER 8x 3.5" SAS/SATA BAYS QUAD CORE XEON 2.93GHZ 24GB PERC 6I
DELL TOWER T610 SERVER 8X 2.5" BAYS SIX CORE XEON 2.26GHZ 24GB PERC 6I DRAC6
DELL TOWER T610 SERVER 8 X 2.5" BAYS QUAD CORE XEON 2.93GHZ 24GB PERC 6I DRAC6
Dell Quad-Core 3.2GHZ XEON i7 Turbo 3ch 24GB DDR3 8TB
Dell Quad-Core 3.2GHZ XEON i7 Turbo 3ch 24GB DDR3 8TB
Dell Quad-Core 3.2GHZ XEON i7 Turbo 3ch 24GB DDR3 6TB
Dell Precision m6600 Laptop NVIDIA 3000M i7-2620M 3 year NBD 
Dell Precision m6600 Laptop i7-2920XM 500GB 3 year NBD
Dell Precision m6600 Laptop i7-2920XM 256GB SSD Camera 3 year NBD 
Dell Precision m6600 Laptop i7-2920XM 250GB 3 year NBD
Dell Precision m6600 Laptop i7-2820M 256GB SSD Camera 3 year NBD 
Dell Precision m6600 Laptop i7-2640M Camera 3 year NBD 
Dell Precision m6600 Laptop i7-2620M Bluetooth 3 year NBD 
Dell Precision m6600 Laptop i5-2540M Bluetooth Camera 3 year NBD 
Dell Precision m6600 Laptop i5-2520M Camera Bluetooth 3 year NBD 
Dell Precision m6600 Laptop 320GB 500GB i7-2820M Camera 3 year NBD 
Dell Precision m4600 Laptop i7-2920XM Extreme 256GB SS 3 year NBD 
Dell Precision m4600 Laptop i7-2720M 256GB SSD 3 year NBD 
Dell Precision m4600 Laptop 256GB SSD i7-2760M Camera 3 year NBD
Dell Precision m4600 Laptop 256GB SS i7-2820M Touchscreen 3 year NBD
Dell Precision m4600 Laptop 256GB SS i7-2820M Camera 3 year NBD
Dell Precision m4600 Laptop 256GB SS i7-2720M Bluetooth 3 year NBD
DELL PRECISION 690 2 x XEON DUAL CORE 8GB RAM 1TB WIN XP PRO
DELL PRECISION 690 2 X XEON DUAL CORE 3GHZ 16GB RAM 1.5TB HD WOW
DELL PRECISION 690 2 x XEON DUAL CORE 1TB WIN XP PRO
Dell Precision 3ch 24GB DDR3 4TB Win7 Pro 64bit i7 XEON
Dell PowerVault MD3000 RAID Storage Array  15 x SAS/SATA Hot plug drive caddies
Dell PowerVault MD3000 RAID Storage Array  15 x 146Gb 15k drives for PowerEdge
DELL PowerVault CSA 46 Terabytes / 46TB 23x 2TB 7200 RPM 6Gb 2U SAS Array
Dell Powervault 210S SCSI Storage Array 2E536 Seagate 73GB 10K U160 hard drive
Dell Poweredge T105 Server
Dell PowerEdge SC420 Pentium 4 2.8GHz 512MB 40GB CD Tower Server w/Video  GbLAN
DELL POWEREDGE R710 SERVER 6x3.5" QUAD CORE XEON 2.93GHZ 36GB RAID PERC 6I DRAC
DELL POWEREDGE R710 SERVER 6x3.5" QUAD CORE XEON 2.93GHZ 36GB RAID PERC 6I DRAC
DELL POWEREDGE R610 SERVER 6 2.5" SAS/SATA BAYS SIX CORE XEON 2.267GHZ 24GB RAID
DELL POWEREDGE R610 SERVER 6 2.5" SAS/SATA BAYS SIX CORE XEON 2.267GHZ 24GB RAID
DELL POWEREDGE R610 SERVER 6 2.5" SAS/SATA BAYS QUAD CORE XEON 2GHZ 24GB RAID
DELL POWEREDGE R610 SERVER 6 2.5" SAS/SATA BAYS QUAD CORE XEON 2GHZ 24GB RAID
DELL POWEREDGE M1000E 16 x M610 2 x X5550 QUAD CORE 2.66GHZ 48GB 2x900GB 10K SAS
DELL POWEREDGE M1000E 16 x M610 2 x X5550 QUAD CORE 2.66GHZ 48GB 2x 73GB 15K SAS
DELL POWEREDGE 6950 SERVER QUAD DUAL CORE 3GHZ AMD 64GB
DELL POWEREDGE 6950 SERVER QUAD DUAL CORE 3GHZ AMD 64GB
DELL POWEREDGE 6950 SERVER QUAD DUAL CORE 3GHZ AMD 32GB
DELL POWEREDGE 6950 SERVER QUAD DUAL CORE 3GHZ AMD 32GB
DELL POWEREDGE 6950 SERVER QUAD DUAL CORE 3GHZ AMD 16GB
DELL POWEREDGE 6950 SERVER QUAD DUAL CORE 3GHZ AMD 16GB
Dell PowerEdge 2950 Server II 2x 2.66GHz 5150 Dual Core 8GB 2x146GB PERC 5i 2PS
Dell PowerEdge 2900 Server Computer Tower Business Office Closeout Special
Dell PowerEdge 1955 Blade Server 2x 3.0GHz 8GB Memory
Dell PowerEdge 1955 Blade Server 2x 3.0GHz 16GB Memory
Dell PowerEdge 1955 Blade Server 2x 2.66GHz 8GB Memory
Dell PowerEdge 1955 Blade Server 2x 2.66GHz 16GB Memory
Dell Next Business  Support 1/26/2013 TAG: 4DT5WL1
Dell Latitude XT2 XFR-Rugged Tablet Laptop-Touchscreen-128GB SSD-WWAN-Win7 Pro-S
Dell Latitude XT2 XFR-Rugged Tablet Laptop-Touchscreen-128GB SSD-WWAN-Win7 Pro-B
DELL LATITUDE XFR D630 RUGGEDIZED 2.20GHz T7500 3GB RAM Touch screen Laptop
Dell Latitude E6420 XFR Laptop Touchscreen i5-2520 Camera 3 year NBD
Dell Latitude E6420 XFR Laptop Touchscreen i5-2520 Bluetooth 3 year NBD
Dell Latitude E6420 XFR Laptop Touchscreen i5-2520 4200M 3 year NBD
Dell Latitude E6420 XFR Laptop Touchscreen i5-2520 3 year NBD
Dell Latitude E6420 XFR Laptop Touchscreen i5-2520 128GB SSD 3 year NBD
Dell Latitude E6420 XFR Laptop i5-2520 Touchscreen 128GB SSD 3 year NBD
Dell Latitude E6420 XFR Laptop i5-2520 DVDRW 3 year NBD
Dell Latitude E6420 XFR Laptop i5-2520 Camera 3 year NBD
Dell Latitude E6420 XFR Laptop i5-2520 Bluetooth 3 year NBD
Dell Latitude E6420 XFR Laptop 128GB SSD Touchscreen i5-2520 3 year NBD
Dell Latitude E6420 XFR Inb i7 2.8GHz 4GB Ram 128GB Solid State  3Y
Dell GX499 M1000e Brocade 4424 Blade Server SAN I/O Module DL-4424-0003
Dell F1D Dual L5335 Inb Xeon Quad Core 2.0Ghz 1U Server
Dell EqualLogic PS6000XV Virtualized iSCSI SAN Storage array 16x 300Gb SAS 15k
Dell 24GB DDR3 real 3 channel RAM 4TB Windows 7 Pro 64bit XEON i7 X58 WiFi
Dell 24GB DDR3 4TB Windows 7 Pro 64bit XEON i7 X58 WiFi
Dell 2155CDN Color LASER Multifunction Printer with Extras
Dell 12GB DDR3 1TB Windows 7 Pro 64bit XEON i7 X58 WiFi
DEC E2052-AA TURBO-LASER IO PORT MODULE OLD STOCK 1-YEAR
DEC 70-40034-01 STARLIGTH BUS LVD I/O MODULE
Dec 54-30756-02 2p Drawer I/o Expander Modul
DEC 54-20698-04 ETM SBC I/O MODULE
DE210P T1 E1 PCI for Digium Asterisk OCTASIC EC TE212P
DE210P Asterisk trixbox Elastix Digium Rhino Sangoma
DDRUM DD1 ELECTRONIC DRUMSET
DCS I/O boards 16 channel with OPTO 22 MODULES IAC5 and OAC5 Lot Price
dbx DRIVERACK-260 Signal Processor
DBX DRIVERACK 260 2X6 LOUDSPEAKER MANAGEMENT SYSTEM W/DISPLAY DRIVE RACK
DBX DRIVE RACK 260 w/ RTA-M MICROPHONE AND 20' XLR CABLE DRIVERACK 260
Dave Smith TETRA analog multitimbral synthesizer / AUTH DEALER / SHIPS FREE
Dave Smith Mopho Synthesizer Module SYNTH PROAUDIOSTAR
Dave Smith Instruments Prophet '08 Synthesizer Module
DATEM DDCM-335 USPP DDCM335
DATAREMOTE Industrial Cellular Modem CDS 9022A TRI MODE
Data-On DNS-1200 2U SAS to SAS/SATA JBOD System
DATAKOM DKG-307 AUTOMATIC MAINS FAILURE UNIT AMF
DashDAQ XL OBD2 custom gauge and data logger with Hyundai/Kia enhanced OBD
DANIEL Industries 2500 Turbo Flow Computer Upgrade
Daisan I/O Module WCSU-44-1_WCSU441
D2-250 Automation Direct PLC with D2-09B D2-16NA D2-08ND3 D2-08TR and F2-02DAS-1
Cytec VM/24KCP VME 24ch Relay I/O Board
Cyclone Microsystems Front End Processor SS7 90 
CWDM-SFP-1590 CWDM 1590 NM SFP GIGABIT ETHERNET 1YR - ASK 4 QTY
CWDM-SFP-1590 CWDM 1590 NM SFP GIGABIT ETHERNET 1YR - ASK 4 QTY
CWDM-SFP-1490 CISCO NM SFP GIGABIT ETHERNET 1YR - ASK 4 QTY
CWDM-SFP-1490 CISCO NM SFP GIGABIT ETHERNET 1YR - ASK 4 QTY
CWDM-SFP-1470 CWDM 1470 NM SFP GIGABIT ETHERNET 1YR - ASK 4 QTY
CWDM-SFP-1470 CWDM 1470 NM SFP GIGABIT ETHERNET 1YR - ASK 4 QTY
CV500-II101 Omron PLC I/O Interface CV500II101
CV500-IC101 Omron PLC I/O Controller CV500IC101
CUTLER-HAMMER GENIUS I/O INTERFACE MODULE 87-01376-00
CUTLER-HAMMER D500DOM1624D
CUTLER-HAMMER D500DOM1615A
CUTLER-HAMMER D500DIM1615A
Cutler-Hammer D500CPU20 Module 224 I/O With D500DM32A24A PROGRAMMABLE CONTROLLER
CUTLER-HAMMER D500AOM210
CUTLER HAMMER D500-ERS-16 USPP D500ERS16
CUTLER HAMMER D500-DM32A24R NSPP D500DM32A24R
CUTLER HAMMER D500-DM32A24R NSFP D500DM32A24R
CUTLER HAMMER D500-AIM800 USPP D500AIM800
CUTLER HAMMER D500-AIM220 USPP D500AIM220
CUTLER HAMMER D320RIM1615A USPP D320RIM1615A
CUTLER HAMMER D100ERA8 USPP D100ERA8
CUTLER HAMMER D100-ERA20 USPP D100ERA20
CUSTOM SERVO 469882-01 USPP 46988201
custom made computer core i5 3.1GHz 4GB 1TB
CUSTOM BUILD YOUR Rugged Handheld Data Collector PDA AT570
CUSTOM BUILD YOUR Rugged Handheld Data Collector PDA AT570
CTI 2531 For Siemens TI 505 Series 32 PT. Form A Relay Module 2531 R1
CTC PARKER AUTOMATION 05-03023-103 USPP 0503023103
CTC Control Technology 2700 Series Automation Controller 2701E 2203 2700-5/2
CT3-12-F0 JUNIPER ERX Channelized T3 Front Card MINT
CS1W-PDC55 Omron PLC CS1WPDC55
CS1W-OD261 Omron PLC 64 Pt. Output CS1WOD261
CS1W-ID261 Omron PLC 64 Pt. Input CS1WID261
CS1W-AD081-V1 Omron PLC 8 Analog CS1WAD081V1
CRS PLUS CRSPLUS SEC-14-112 I/O EXPANSION MODULE
CROUZET PB-16 16 PORTS 8X IDC-5  8X ODC-5 I/O MODULE
CRM222R SYMAX REMOTE INTERFACE MODULE
CRM222 SYMAX REMOTE INTERFACE MODULE
Crestron Theater Touchpanel Kit   MP2  STX-1700C
Crestron Rack2
Crestron Pro2 Professional Dual Bus Control System 1200 off retail price
Crestron PRO2 Professional Automation Control System
Crestron PRO2 Processor Dual Bus 2 Series Control System AV2 Rack2 CP2E
Crestron Pro2 Dual Bus Processor
Crestron Pro2 Dual Bus Processor
CRESTRON PRO2 DUAL BUS CONTROL SYSTEM HOME AUTOMATION
Crestron PRO2 control processor with C2-ENET1 and 64MB DRAM. Core3 UI supported
Crestron Pro 2 Professional Dual Bus Control System/ 1300 under retail
Crestron Pro 2
Crestron MP2E Integrated AV Control System with Ethernet 
Crestron MC2W System Processor w/ RF Gateway EUC
Crestron MC2E
Crestron In-Wall Theater Touchpanel Kit   MP2 STX-1700c
Crestron In-Wall Theater Touchpanel Kit   MP2 STX-1700c
Crestron CP2E Processor control automation with PWR Supply and Lan
Crestron CP2E Control Processer w/ Ethernet  Power Supply Guarantee Working
Crestron CP2E Control Processer w/ Ethernet  Power Supply GOOD SHAPE
CRESTRON CP2 CONTROL PROCESSOR SYSTEM HOME AUTOMATION
Crestron CEN-NVS200 Network Video Streamer
Crestron C2N-VEQ4 4-Channel Volume/EQ Control Module  ST-COM 2 Module  ST-RMK
CRESTRON C2N-VEQ4 4 Ch Volume Controller Audio Matrix Mixer
Crestron AV2 Processor Dual Bus 2 Series Control System PRO2 Rack2 CP2E
Crestron AV2 Dual Bus Processor
Crestron AV2 Dual Bus Controller
CRESTRON AV2 DUAL BUS CONTROL SYSTEM HOME AUTOMATION a
CRESTRON AV2 DUAL BUS CONTROL PROCESSOR HOME AUTOMATION
Crestron AV2 Dual Bus Control Lightly  no card
Crest Audio CKV800 Amplifier
Cray-3 SuperComputer Modules Proto-Types This is part of the production
CQM1H-MAB42 Omron PLC Analog Card CQM1HMAB42
CP-SINGLFOOTSTAND FOOTSTAND KIT FOR SINGLE 7914
CP-SINGLEFOOTSTAND CISCO
CP-PWR-CUBE-3 TRANSFORMER FOR CISCO 7900 SERIES IP PHONE
CP-PWR-CUBE-2 IP PHONE POWER TRANSFORMER FOR THE 7970 PHONE
CP-PWR-CUBE-2 IP PHONE POWER TRANSFORMER FOR 7900 SERIES PHONE
CP-PWR-7920-NA CISCO 7920 SERIES POWER SUPPLY FOR NORTH AMERICA NA
CP-PWR-7920-NA CISCO 7920 SERIES POWER SUPPLY FOR NORTH AMERICA NA
CPM1A-MAD01 Omron PLC Analog I/O CPM1AMAD01
CP-LCKNGWALLMNT2 UNIVERSAL LOCKING WALLMOUNT KIT FOR 7900 SERIES IP PHONES
CP-LCKNGWALLMNT WALLMOUNT KIT FOR 7900 SERIES IP PHONES
CP-DSKCH-BUN-7920 CISCO 7920 DESK TOP CHARGER ASSY
CP-BATT-7920-EXT CISCO 7920 BATTERY EXTENDED
CP-BATT-7920-EXT CISCO 7920 BATTERY EXTENDED
CP-7985 CISCO IP VIDEO PHONE 7985 NTSC
CP-7970G CISCO IP PHONE 7970 GIG ETHERNET COLOR
CP-7970G CISCO IP PHONE 7970 GIG ETHERNET COLOR
CP-7970G CISCO IP PHONE 7970 GIG ETHERNET COLOR
CP-7962G Cisco Unified IP Phone 7962 VoIP
CP-7961G Cisco IP Phone 7961 VoIP Phone
CP-7960G CISCO IP Phone 7960 Voip Unified Grade A
CP-7960G Cisco IP Phone 7960 VoIP Phone 
CP-7945G CISCO UNIFIED IP PHONE 7945 GIG ETHERNET COLOR
CP-7945G CISCO UNIFIED IP PHONE 7945 GIG ETHERNET COLOR
CP-7942G Cisco IP Phone 7942 VoIP Phone 
CP-7942G Cisco IP Phone 7942 VoIP Phone
CP-7941G Cisco IP Phone 7941 VoIP Phone
CP-7941G Cisco IP Phone 7941 VoIP
CP-7940G Cisco IP Phone 7940 VoIP Phone
CP-7940G Cisco IP Phone 7940 VoIP Phone
CP-7921G-A-K9 7921 CISCO VOIP IP Phone w/BatteryCharger
CP-7916 Cisco IP Phone Expansion Module
CP-7916 Cisco IP Phone Expansion Module
CP-7916 CISCO IP PHONE 7916 IP PHONE COLOR EXPANSION MODULE
CP-7916 CISCO IP PHONE 7916 IP PHONE COLOR EXPANSION MODULE
CP-7916 CISCO IP PHONE 7916 IP PHONE COLOR EXPANSION MODULE
CP-7914 CISCO IP PHONE EXPANSION MODULE FOR 7960
CP-7911G Cisco IP Phone 7911 VoIP Phone F.SEALED
CP-7911G Cisco IP Phone 7911 VoIP Phone
CORE i5 CLARKDALE ORIGEN S10V MEDIA CENTER PC
Coolermaster Cosmos 1000 Pebance Meets Silence Full Tower
Cooler Master Cosmos by CSX Smooth Creations Custom Painted 8 of 50
Control Technology Model2200 Controller 2203 2203 2200XM
CONTROL TECHNOLOGY INC 2501 USPP 2501
CONTROL TECHNOLOGY 5100 SERIES BLUE FUSION 5101 BCCASS AUTOMATION CONTROLLER
CONTROL TECHNIQUES MIC8116-2 USPP MIC81162
CONAIR 107-196-1103 USPP 1071961103
Computer Products Controller TRP7431/60  Lucas I/O
Computer Interface Module Blue Box Sci-Comp Apple
COMPUMOTOR PIO-306 NSFP PIO306
Compro IP570 PTZ 1.3 HDH.264 IP Carmera
Compro IP540 /Night PTZ Megapixel/HD Network Camera
Compro IP540 /Night PTZ Megapixel/HD Network Camera
Complete Lucent Excel EXS-2000 Switch W/ 29 Modules
Complete in original box
Compaq Evo Workstation W6000 Tower XEON WIN XP PRO
Compaq E2052-AA Turbo-laser I/o Port Module D03
Compaq 70-40616-01 245144-001 FC I/O Module
Compal BL3 15.6" Gaming Laptop i5 500GB 8GB WiFi WebCam HDMI  Custom
CompactLogix 1769-IT6 NIBFS
COMBO Inb i5-2500K QUAD CORE CPU/8GB DDR3 RAM/GIGABYTE GA-B75M-D3H Motherboard
COMBO Inb i5-2500K QUAD CORE CPU/4GB DDR3 RAM/GIGABYTE GA-B75M-D3H Motherboard
COMBO Inb i5-2500K QUAD CORE CPU/2GB DDR3 RAM/GIGABYTE GA-B75M-D3H Motherboard
COMBO Inb i5-2500K LGA 1155 QUAD CORE CPUGIGABYTE GA-B75M-D3H CFX Motherboard
COMBO Inb i5-2500K CPU8GBRAMGIGABYTE GA-B75M-D3H HDMI SATA6 USB3 Motherboard
COMBO Inb i5-2500K CPU4GBRAMGIGABYTE GA-B75M-D3H HDMI SATA6 USB3 Motherboard
COMBO Inb i5-2500K CPU 2GB RAM GIGABYTE GA-B75M-D3H HDMI SATA6 USB3 CFX MOBO
COMBO Inb i5-2400 QUAD CORE CPU/8GB DDR3 RAM/GIGABYTE GA-B75M-D3H Motherboard
COMBO Inb i5-2400 QUAD CORE CPU/4GB DDR3 RAM/GIGABYTE GA-B75M-D3H Motherboard
COMBO Inb i5-2400 QUAD CORE CPU/2GB DDR3 RAM/GIGABYTE GA-B75M-D3H Motherboard
COMBO Inb i5-2400 CPU8GB RAMGIGABYTE GA-B75M-D3H HDMI SATA6 USB3 Motherboard
COMBO Inb i5-2400 CPU4GB RAMGIGABYTE GA-B75M-D3H HDMI SATA6 USB3 Motherboard
COMBO Inb i5-2400 CPU2GB RAMGIGABYTE GA-B75M-D3H HDMI SATA6 USB3 Motherboard
COMBO Inb i3-2125 DUAL CORE CPU/4GB DDR3 RAM/GIGABYTE GA-B75M-D3H Motherboard
COMBO Inb i3-2125 DUAL CORE CPU/2GB DDR3 RAM/GIGABYTE GA-B75M-D3H Motherboard
COMBO Inb i3-2125 DUAL CORE CPU/16GB DDR3 RAM/GIGABYTE GA-B75M-D3H Motherboard
COMBO Inb i3-2125 CPU4GB RAMGIGABYTE GA-B75M-D3H HDMI SATA6 USB3 Motherboard
COMBO Inb i3-2125 CPU2GB RAMGIGABYTE GA-B75M-D3H HDMI SATA6 USB3 Motherboard
COMBO Inb i3-2125 CPU16GBRAMGIGABYTE GA-B75M-D3H HDMI SATA6 USB3 Motherboard
COMBO Inb i3-2100 DUAL CORE CPU/16GB DDR3 RAM/GIGABYTE GA-B75M-D3H Motherboard
COMBO Inb i3-2100 CPU16GBRAMGIGABYTE GA-B75M-D3H HDMI SATA6 USB3 Motherboard
COMBO AMD X6 1045T CPUBIOSTAR TA870U3 CFX SATA6 USB3 AM3 Motherboard4GB RAM
COMBO AMD X6 1045T CPUBIOSTAR TA870U3 CFX SATA6 USB3 AM3 Motherboard2GB RAM
COMBO AMD X6 1045T CPU4GB DDR3 RAMBIOSTAR TA870U3 CFX SATA6 USB3 Motherboard
COMBO AMD X6 1045T CPU2GB DDR3 RAMBIOSTAR TA870U3 CFX SATA6 USB3 Motherboard
COMBO AMD X6 1045T CPU16GB DDR3 RAMBIOSTAR TA870U3 CFX SATA6 USB3 Motherboard
COMBO AMD X4 965 CPUBIOSTAR TA870U3 CFX SATA6 USB3 AM3 Motherboard8GB RAM
COMBO AMD X4 965 CPUBIOSTAR TA870U3 CFX SATA6 USB3 AM3 Motherboard4GB RAM
COMBO AMD X4 965 CPUBIOSTAR TA870U3 CFX SATA6 USB3 AM3 Motherboard2GB RAM
COMBO AMD X4 965 CPUBIOSTAR TA870U3 CFX SATA6 USB3 AM3 Motherboard16GB RAM
COMBO AMD X4 955 CPUBIOSTAR TA870U3 CFX SATA6 USB3 AM3 Motherboard8GB RAM
COMBO AMD X4 955 CPUBIOSTAR TA870U3 CFX SATA6 USB3 AM3 Motherboard4GB RAM
COMBO AMD X4 955 CPUBIOSTAR TA870U3 CFX SATA6 USB3 AM3 Motherboard2GB RAM
COMBO AMD X4 955 CPUBIOSTAR TA870U3 CFX SATA6 USB3 AM3 Motherboard16GB RAM
COMBO AMD X4 645 CPUBIOSTAR TA870U3 CFX SATA6 USB3 AM3 Motherboard8GB RAM
COMBO AMD X4 645 CPUBIOSTAR TA870U3 CFX SATA6 USB3 AM3 Motherboard2GB RAM
COMBO AMD FX-8150 EIGHT CORE CPU16GB DDR3 RAMMSI 970A-G45 CFX AM3 Motherboard
COMBO AMD FX-8120 CPU 8GB DDR3 RAM MSI 970A-G45 CFX SATA6 USB3 Motherboard
COMBO AMD FX-8120 CPU 2GB RAM MSI 970A-G45 CFX SATA6 USB3 GIGALAN Motherboard
COMBO AMD FX-6100 SIX CORE CPU4GB DDR3 RAMMSI CFX SATA6 USB3 AM3 Motherboard
COMBO AMD FX-6100 SIX CORE CPU16GB DDR3 RAMMSI 970A-G45 CFX AM3 Motherboard
COMBO AMD FX-6100 CPU 4GB DDR3 RAM MSI 970A-G45 CFX SATA 6 USB 3.0 Motherboard
COMBO AMD FX-6100 CPU 2GB RAM MSI 970A-G45 CFX SATA6 USB3 GIGALAN Motherboard
COMBO AMD FX-4100 QUAD CORE CPU16GB DDR3 RAMMSI 970A-G45 CFX AM3 Motherboard
COMBO AMD FX-4100 CPU 8GB DDR3 RAM MSI 970A-G45 CFX SATA 6 USB 3.0 Motherboard
COMBO AMD 965 QUAD CORE CPU BIOSTAR TA870U3 CrossFireX SATA6 USB3 Motherboard
COMBO AMD 965 CPUBIOSTAR TA870U3 CFX SATA6 USB3 GIGABIT LAN AM3 Motherboard
COMBO AMD 965 3.4G CPU8GB DDR3 RAMBIOSTAR TA870U3 CFX SATA6 USB3 Motherboard
COMBO AMD 965 3.4G CPU4GB DDR3 RAMBIOSTAR TA870U3 CFX SATA6 USB3 Motherboard
COMBO AMD 965 3.4G CPU2GB DDR3 RAMBIOSTAR TA870U3 CFX SATA6 USB3 Motherboard
COMBO AMD 965 3.4G CPU16GB DDR3 RAMBIOSTAR TA870U3 CFX SATA6 USB3 Motherboard
COMBO AMD 955 3.2G CPU8GB DDR3 RAMBIOSTAR TA870U3 CFX SATA6 USB3 Motherboard
COMBO AMD 955 3.2G CPU4GB DDR3 RAMBIOSTAR TA870U3 CFX SATA6 USB3 Motherboard
COMBO AMD 955 3.2G CPU2GB DDR3 RAMBIOSTAR TA870U3 CFX SATA6 USB3 Motherboard
COMBO AMD 955 3.2G CPU16GB DDR3 RAMBIOSTAR TA870U3 CFX SATA6 USB3 Motherboard
COMBO AMD 1045T SIX CORE CPU BIOSTAR TA870U3 CrossFireX SATA6 USB3 Motherboard
COMBO AMD 1045T CPUBIOSTAR TA870U3 CFX SATA6 USB3 GIGABIT LAN AM3 Motherboard
Colorado Vnet iM1-8 CHANNEL 8 INPUT MODULE BOARD true home automation
Cob or Dedicated Server 1U half Depth LIGHT
Cob Dedicated Low Power Server 2x Inb Xeon LV 5148 4GB RAM 2x 500GB HD
Cognex Insight IS5100-01 Complete System
Cognex In-Sight CIO-1460 I/O Module Expansion CIO1460 800-5815-1 Opto-Expansion
Cognex In-Sight 4001 1024 x 768 18 fps Smart Camera 800-5770-1 InSight
Cognex In-Sight 2000 Kit Processor Camera Light Cables 800-5714-1 800-5715-1
COGNEX 800-5758-1 NSFP 80057581
Code Reader 2.0 CR2 BarCode Reader with bluetooth CR2
CNC Stepper Motor Driver 24-80VDC 2-6A Mircostepping 3 Axis Driver Kit
CNC MicroMill 2000HD-ER System with Mach 3 9in X-axis and ER Spindle Assembly
CLEAR-COM i-STATIONS MAIN AND EXTENSION PANELS FOR CLEARCOM ECLIPSE  MATRIX 3
CLEAN UNIT TOUCHSCREEN STYLUS WIN 7 OFFICE 2007
CLEAN UNIT TOUCHSCREEN STYLUS WIN 7 OFFICE 2007
CLEAN UNIT TOUCHSCREEN STYLUS WIN 7 OFFICE 2007
CLEAN UNIT TOUCHSCREEN STYLUS WIN 7 OFFICE 2007
CJ1W-DA041 Omron PLC Analog Output CJ1WDA041
CISCOAS535-AC-RPS AS5350 AC REDUNDANT POWER SUPPLY
CISCO891-K9 CISCO Router
CISCO878-K9 878 G.SHDSL SECURITY ROUTER
CISCO878-K9 878 G.SHDSL SECURITY ROUTER
CISCO877-SEC-K9 877 ROUTER W/SECURITY BUNDLE WITH ADVANCED IP SERVICES
CISCO877-K9 ADSL CISCO 877 ROUTER
CISCO871W-G-A-K9 871 DUAL E SECURITY ROUTER W/802.11G FCC
CISCO871W-G-A-K9 871 DUAL E SECURITY ROUTER W/802.11G FCC
CISCO871-SEC-K9 CISCO
CISCO871-SEC-K9 CISCO
CISCO871-SEC-K9 871 ROUTER SECURITY BUNDLE WITH ADVANCED IP SERVICES
CISCO871-K9 DUAL ETHERNET SECURITY ROUTER
CISCO857W-G-A-K9 ADSL SOHO SEC ROUTER W/802.11G
CISCO7613 w/ WS-X6716-10G-3C  SUP720-3BXL Fast Shippin
CISCO7613 w/ WS-X6716-10G-3C  SUP720-3BXL Fast Shippin
CISCO7613 w/ VS-S720-10G-3CXL  X6708-10G-3C Dual AC
CISCO7613 w/ VS-S720-10G-3C  WS-X6708-10G-3C Fast Ship
CISCO7613 w/ VS-S720-10G-3C  WS-X6708-10G-3C Fast Ship
CISCO7609 with X6748 VS-S720-10G-3C X6704
CISCO7609 with X6748 VS-S720-10G-3C X6704
CISCO7609 w/ VS-S720-10G-3C WS-X6148A-GE-45AF 7609
CISCO7609 w/ VS-S720-10G-3C WS-X6148A-GE-45AF 7609
CISCO7609 Router w/ VS-S720-10G-3C  X6704-10GE
CISCO7609 Router w/ VS-S720-10G-3C  X6704-10GE
CISCO7609 BUNDLE W/ SUP720-3BXL  X6748-GE-TX
CISCO7609 BUNDLE W/ SUP720-3BXL  X6748-GE-TX
CISCO7609 7609 Router Chassis -1yr - Available
CISCO7609 7609 Router Chassis -1yr - Available
CISCO7606 BUNDLE Router w/ WS-X6716-10T-3C  FAN-MOD-6HS 7606
CISCO7606 BUNDLE Router w/ WS-X6716-10T-3C  FAN-MOD-6HS 7606
Cisco7606 7606 Router Chassis
Cisco7606 7606 Router Chassis
CISCO7204VXR Router Chassis-Warranty-Fast Ship
CISCO7201 7201 CHASSIS 2GB MEMORY DUAL P/S 256MB FLASH
CISCO7200VXR 7200 Series Router NPE-400 Bundle. Complete Unit
CISCO7140-2FE/VPN Router 7140
CISCO7140-2FE/VPN Router 7140
CISCO7120-4T1 Router CISCO 7120
CISCO7120-4T1 Router CISCO 7120
CISCO3945-V/K9  FREE 1 YEAR WRNTY -3945 VOICE BUNDLE
CISCO3945-SEC/K9  FREE 1YEAR  3945-SEC/K9 BUNDLE
CISCO3945E-V/K9  FREE 1 YEAR WRNTY -3945E VOICE BUNDLE
CISCO3945E-V/K9  FREE 1 YEAR WRNTY -3945E VOICE BUNDLE
CISCO3945E-SEC/K9 3945E SECURITY BUNDLE W/SEC LICENSE PAK
CISCO3945E-SEC/K9 3945E SECURITY BUNDLE W/SEC LICENSE PAK
CISCO3945E/K9  FREE 1 YEAR WRNTY 3945EK9
CISCO3945E/K9  FREE 1 YEAR WRNTY 3945EK9
CISCO3945/K9 W/SPE150 3GE4EHWIC4DSP4SM256MBCF1GB
CISCO3945/K9  FREE 1 YEAR WRNTY- 3945K9
CISCO3925-V/K9  FREE 1 YEAR WRNTY -3925 VOICE BUNDLE
CISCO3925-SEC/K9  FREE 1 YEAR WRNTY -3925 SEC BUNDLE
CISCO3925E-SEC/K9 3925E SECURITY BUNDLE W/SEC LICENSE PAK
CISCO3925E-SEC/K9 3925E SECURITY BUNDLE W/SEC LICENSE PAK
CISCO3925E/K9  FREE 1 YEAR WRNTY-3925E
CISCO3925E/K9  FREE 1 YEAR WRNTY-3925E
CISCO3925/K9 W/3GE4EHWIC4DSP2SM SLOTS256MBCF1GB
CISCO3845-V3PN/K9 ROUTER WITH 1YR  3845-V3PN/K9
CISCO3845-V3PN/K9 ROUTER WITH 1YR  3845-V3PN/K9
CISCO3845-V3PN/K9 FREE 1YR - 3845 VOICE VPN BUNDLE
CISCO3845-V3PN/K9 FREE 1YR - 3845 VOICE VPN BUNDLE
CISCO3845-V/K9 ROUTER WITH 1YR  3845 W/VOICE UPGRADE
CISCO3845-V/K9 ROUTER WITH 1YR  3845 W/VOICE UPGRADE
CISCO3845-V/K9 3845 VOICE BUNDLE 1YR  10AVAILABLE
CISCO3845-V/K9 3845 VOICE BUNDLE 1YR  10AVAILABLE