XU-DV0704Z變頻器
XU-DV0704Z變頻器
XU-DV0704Z變頻器
個人計算機(以下簡稱PC)具有較強的數據處理功能,配備著多種語言,若選擇適當的操作係統,則可提供優良的軟件平臺,開發各種應用係統,特別是動態畫面顯示等。隨著工業PC的推出,PC在工業現場運行的可靠性問題也得到了解決,用戶普遍感到,把PC連入PLC應用係統可以帶來一係列的好處。
1. PC與PLC實現通信的意義
把PC連入PLC應用係統具有以下四個方面作用:
1)構成以PC為上位機,單臺或多臺PLC為下位機的小型集散係統,可用PC實現操作站功能。
2)在PLC應用係統中,把PC開發成簡易工作站或者工業終端,可實現集中顯示、集中報警功能。
3)把PC開發成 PLC編程終端,可通過編程器接口接入PLC,進行編程、調試及監控。
4)把PC開發成網間連接器,進行協議轉換,可實現PLC與其它計算機網絡的互聯。
2. PC與PLC實現通信的方法
把PC連入PLC應用係統是為了向用戶提供諸如工藝流程圖顯示、動態數據畫面顯示、報表編制、趨勢圖生成、窗口技術以及生產管理等多種功能,為PLC應用係統提供良好、物美價廉的人機界面。但這對用戶的要求較高,用戶做較多的開發工作,才能實現PC與PLC的通信。
為了實現PC與PLC的通信,用戶應當做如下工作:
1)判別PC上配置的通信口是否與要連入的PLC匹配,若不匹配,則增加通信模板。
2)要清楚PLC的通信協議,按照協議的規定及幀格式編寫PC的通信程序。PLC中配有通信機制,一般不需用戶編程。若PLC廠家有PLC與PC的通信軟件出售,則此項任務較容易完成。
3)選擇適當的操作係統提供的軟件平臺,利用與PLC交換的數據編制用戶要求的畫面。
4)若要遠程傳送,可通過Modem接入電話網。若要PC具有編程功能,應配置編程軟件。
3. PC與PLC實現通信的條件
從原則上講,PC連入PLC網絡並沒有什麼困難。只要為PC配備該種PLC網的通信卡以及通信軟件,按要求對通信卡進行初始化,並編制用戶程序即可。用這種方法把PC連入PLC網絡存在的問題是價格問題。在PC上配上PLC制造廠生產的通信卡及通信軟件常會使PC的價格數倍甚至十幾倍的升高。
用戶普遍感興趣的問題是,能否利用PC中已普遍配有的異步串行通信適配器加上自己編寫的通信程序把PC連入PLC網絡,這也正是本節所要重點討論的問題。
帶異步通信適配器的PC與PLC通信並不行得通,只有滿足如下條件才能實現通信。
1)只有帶有異步通信接口的PLC及採用異步方式通信的 PLC網絡才有可能與帶異步通信適配器的PC互連。同時還要求雙方採用的總線標準一致,都是RS-232C,或者都是RS-422(RS-485),否則要通過“總線標準變換單元”變換之後才能互連。
2)要通過對雙方的初始化,使波特率、數據位數、停止位數、奇偶校驗都相同。
3)用戶熟悉互聯的PLC採用的通信協議。嚴格地按照協議規定為PC編寫通信程序。在PLC一方不需用戶編寫通信程序。
滿足上述三個條件,PC就可以與PLC互聯通信。如果不能滿足這些條件則應配置網卡及通信軟件實現互聯。
4. PC與PLC互聯的結構形式
用戶把帶異步通信適配器的PC與PLC互聯通信時通常採用如圖7-12所示的兩種結構形式。一種為點對點結構,PC的COM口與PLC的編程器接口或其它異步通信口之間實現點對點鏈接, 如圖7-12a所示。另一種為多點結構,PC與多臺PLC共同連在同一條串行總線上,如圖7-12b所示。多點結構採用主從式存取控制方法,通常以PC為主站,多臺PLC為從站,通過周期輪詢進行通信管理。
圖7-12 常用結構形式
a)點對點結構 b)多點結構
5. PC與PLC互聯通信方式
目前PC與PLC互聯通信方式主要有以下幾種:
1)通過PLC開發商提供的係統協議和網絡適配器,構成特定公司產品的內部網絡其通信協議不公開。互聯通信使用開發商提供的上位組態軟件,並採用支持相應協議的外設。這種方式其顯示畫面和功能往往難以滿足不同用戶的需要。
2)購買通用的上位組態軟件,實現PC與PLC的通信。這種方式除了要增加係統投資外,其應用的靈活性也受到的局限。
3)利用PLC廠商提供的標準通信口或由用戶自定義的自由通信口實現PC與PLC互聯通信。這種方式不需要增加投資,有較好的靈活性,特別適合於小規模控制係統。
本節主要介紹利用標準通信口或由用戶自定義的自由通信口實現
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New CISCO WS-C4506E-S7L+96 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems WS-X4724-SFP-E | incl 19% VAT | 2 years Cybertrading warranty
CISCO - WS-X4712-SFP+E= - Catalyst 4500 E-Series 12-Port 10GbE (SFP+)
CISCO CATALYST 3650 48 PORT FULL POE 2X10G UPLINK IP BASE IN
NEW IN BOX CISCO ASA5545-K9 FIREWALL EDITION ASA5545 90DAYS WARRANTY
New CISCO WS-C4506E-S7L+96 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems WS-C3850-48U-S incl 19% VAT // 2 years IT4Trade warranty
Cisco Systems WS-C4506E-S7L+96
*New* CISCO ASR1001X-2.5G-K9 w/ Dual Power ASR1001-X w/ 6-built-in GE ports
New Cisco Systems ASR-9010-AC | incl 19% VAT | 2 years Cybertrading warranty
New CISCO ASR1001X-2.5G-K9 ASR1001-X w/ 6-built-in GE ports w/ Dual Power
Cisco Systems WS-C4500X-F-16SFP+
Cisco Systems ASA5525-IPS-K8
Cisco UCS C240 M3 2x 8-Core Xeon E5-2670 2.6GHz 384GB Ram 24TB 2u Rack Server
New Cisco Systems WS-X4724-SFP-E | incl 19% VAT | 2 years Cybertrading warranty
*NEW Factory Sealed* CISCO ASA5545-K9 ASA5545-X Firewall Edition w/warranty
#NEW# Cisco ASR1001X-2.5G-K9 ASR-100X Bundle Router #FAST SHIPMENT#
New CISCO ASR1001X-2.5G-K9 w/ 6-built-in GE ports w/ Dual Power ASR1001-X
Cisco Systems MXE-5600-K9
New Cisco Systems WS-C3650-48FS-E | incl 19% VAT | 2 years Cybertrading warranty
! BRAND NEW IN BOX ! Cisco ASA5545-K9 ASA 5545-X Firewall Edition !SHIP FAST !
Cisco Systems WS-C3850-24S-E
Cisco Systems WS-C4500X-16SFP+ incl 19% VAT // 2 years IT4Trade warranty
New Cisco Systems AIR-CT5508-25-K9 incl 19% VAT // 2 years IT4Trade warranty
CISCO - WS-X6816-10G-2T - 16 Port 10G with DFC4
Cisco UCSC-C240-M3S dual P/S 24x 600GB 6Gb SAS, Xeon E5-2620v2, 256GB (16GB)
NEW Sealed Cisco ASR1001-X CISCO 6 GE PORT Router w/ Dual Power L-SLASR1-AES
*NEW* ASR1001-X= Cisco ASR1001-X Chassis, 6 built-in GE, Dual P/S, 8GB DRAM
NEW IN BOX Cisco N7K-M148GS-11L Nexus 7000 M1 Series 48 Port Gigabit Ethernet
NEW SEALED Cisco N7K-M148GS-11L Nexus 7000 M1-Series 48-Port Gigabit Ethernet
Cisco Catalyst 3850-48P-S - Switch - L3
*New Sealed*Cisco ASR1001-X 6GE PORT Router with Dual Power Supply Qty available
Cisco DS-C9250I-K9 MDS 50-Port MultiService Fabric Switch w/ 3x DS-C50I-300AC
CISCO CATALYST 3850 48 PORT DATA IP BASE EN
CISCO SG350XG-48T 48-PORT 10GBASE-T STACKABLE SWITCH IN
Cisco Systems MXE-5600-K9 | incl 19% VAT | 2 years Cybertrading warranty
New CISCO ASA5510-CSC20-K9 | incl 19% VAT | 2 years Cybertrading warranty
*** NEW Cisco WS-C3850-24S-E CISCO 24PT SFP GE SWITCH, IP SERVICE
New Sealed Cisco WS-C4500X-24X-ES Catalyst Switch 24 ports 1earWarnty 2+Availae
New Sealed Cisco WS-C4500X-24X-ES Catalyst 4500-X 24 Port 10GE Enterprise Swith
Cisco Systems C3945-VSEC-CUBE/K9 incl 19% VAT // 2 years IT4Trade warranty
New Cisco Systems MCS-7845-H1-RC1 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems MCS-7845-H1-S31 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems MCS-7845-H1-UC1 | incl 19% VAT | 2 years Cybertrading warranty
New CISCO MCS-7845-H2-CCE4 | incl 19% VAT | 2 years Cybertrading warranty [MCS-7
New CISCO MCS-7845-H2-CCX1 | incl 19% VAT | 2 years Cybertrading warranty [MCS-7
New CISCO MCS-7845-H2-IPC2 | incl 19% VAT | 2 years Cybertrading warranty [MCS-7
New CISCO MCS7845H2-K9-CMB1D | incl 19% VAT | 2 years Cybertrading warranty [MCS
New CISCO MCS7845H2-K9-CMC1 | incl 19% VAT | 2 years Cybertrading warranty [MCS7
New CISCO MCS7845H2-K9-UCB1 | incl 19% VAT | 2 years Cybertrading warranty [MCS7
New CISCO MCS-7845-H2-MOB1 | incl 19% VAT | 2 years Cybertrading warranty [MCS-7
Cisco UCSC-C240-M3S dual P/S 6x 600GB 6Gb SAS, 2x Xeon E5-2667v2, 48GB (8GB)
Cisco Systems 15454-10G-S1
Cisco Systems 2OC192/POS-SR-SC
CISCO - SPA-10X1GE-V2= - Cisco 10-Port Gigabit Ethernet Shared Port Adapter
we buy Cisco ** WS-C3850-48F-S** (Brand New in Box) 3850 Series POE (MO)
Cisco CRS-16-FC140/M CRS-3 CRS-16-LCC SWITCH FABRIC CARD
CISCO NEW 7600-SIP-600= CISCO 7600 Series SPA Interface Processor-600
NEW CISCO SPA-1X10GE-WL-V2 with 1 Year Warranty and Fast Shipping
Cisco SCE8000-SCM-E Cisco SCE8000 Service Control Module - Extended TESTED STOCK
Cisco 4OC3X/POS-MM-MJ-B Line Card ISE 1YearWarranty 2+Available
Cisco WS-C4506E-S6L-2800 Catalyst Switch 1YearWarranty 2+Available
NEW SEALED Cisco PWR-SCE-AC V01 AC Power Supply for SCE1010 SCE2020 1YearWaranty
CISCO N6K-C6001-64T NEXUS 6001, 1RU SWITCH, FIXED 48P 3 YR WARRANTY
Cisco UCSB-B200-M3 128GB, Intel E5-2609 v2, 300GB 6Gb SAS
New Cisco ASR1001-X= Chassis with Dual Power. 8GB DRAM
~NEW SEALED~ CISCO N2K-C2232TF-E 2000 Series Fabric Extender ~FAST DELIVERY~
Cisco RSP720-3CXL-10GE TESTED AND WORKING
New Sealed ISR4451-X/K9 Cisco 4451-X Integrated Services Router *free shipping*
Original Genuine. CISCO WSA-S680-K9 Web security appliance NOB In Stock.
CISCO 76-ES+T-2TG Es+ Low Queue 2 Port 10ge - 3cxl Nob 3YR WNTY
NEW Cisco WS-X6904-40G-2T Cisco Catalyst 6900 Series 4-Port 40 Gigabit Ethernet
NEW/open box Cisco Nexus N3K-C3172PQ-10GE 48SFP+ 6QSFP+ *Active SMARTnet*
NEW Cisco Catalyst WS-3850-48T-E 48 Port Gigabit Ethernet Switch
CISCO WS-C6506-E w/ Fan, Dual Power, 2x SUP720-3BXL, 4x WS-X6704,1x 7600-SIP-400
*New Sealed* Cisco WS-C3850-12XS-S 12 ports w/ 350WAC power + C3850-NM-4-10G
CISCO CATALYST 3850 48 PORT FULL POE LAN BASE EN
NEW SEALED CISCO AIR-CAP3702P-A-K9 Wireless Access Point AIR-CAP3702P 10+ QTY
Cisco MGX8850/B ATM Switch PXM-45/C Free Ship 365Day Warranty!
New Cisco CFP-40G-FR 40GBASE-FR CFP module 2KM SMF Duplex SC 1550nm VSR2000-3R2
NEW Cisco ASR1001-X Router Bundle w/DUAL POWER & L-SLASR1-AES License
CISCO ESA-C680-K9 Email Security Appl. AsyncOS 8.5.6 For Cisco C680 w/ Drives z5
CISCO C680 Email Security Appliance AsyncOS 8.5.6 For Cisco C680 with Drives z5
CISCO UCS-C240-M3 Email Security Appl. AsyncOS 8.5.6 For Cisco C680 w/ Drives z5
New Sealed Cisco Nexus N5K-C5548UP-FA 48 SFP Port Switch Factory Sealed
Cisco UCSB-B200-M3 18x 16GB DDR3, 2x E5-2630 v2, 2x 300GB 6Gb SAS 10K RPM SFF
NEW Sealed Cisco ASR1001-X CISCO 6 GE PORT Router with Dual Power Supply ASR1001
New CISCO 15454-MRP-L1-46.1 | incl 19% VAT | 2 years Cybertrading warranty
New CISCO 15454-MRP-L1-58.1 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems ASA5525-K7 incl 19% VAT // 2 years IT4Trade warranty
New Cisco Systems ASA5525-K8 incl 19% VAT // 2 years IT4Trade warranty
Cisco WS-C3650-48PS-E - New Sealed PoE Switch - £5100 ex VAT - (3560X 3750X)
Cisco Systems AS54-E1-492NP
Cisco 76-ES+T-4TG ES+ Low Queue 4 port 10GE - 3CXL for Cisco 7603
Cisco UCSB-B200-M3 64GB, 2x Intel 3.3 GHzE5-2667v2, 2x 300GB 6Gb SAS 10K RPM
~NEW SEALED~ CISCO ISR4431-SEC/K9 Integrated Service Router ~FAST DELIVERY~
*New Sealed*Cisco ASR1001 Cisco ASR 1000 Series Aggregation Services Router
NEW Sealed ISR4451-X/K9 Cisco 4451-X Integrated Services Router *Smartnetable*
NEW FACTORY Sealed Cisco WS-C3850-24XS-S 24 SFP+ Ethernet 715 W AC Power
Cisco WS-C4506-E - X45-SUP7-E, 4x X4648-RJ45-E,2x 4200ACV
Cisco UBR10000 UBR10012 PRE4 Complete DOCSIS 3.0 UBR-MC20X20V-20D UBR10-DTCC
Cisco Nexus N9K-C9396TX L3 Managed 48 Port Switch 1YearWarranty 2+Available
New CISCO MCS-7845-H2-PSBU | incl 19% VAT | 2 years Cybertrading warranty [MCS-7
Cisco Systems N77-C7710-FAB-2
Cisco Systems BPX-BXM-622-2DX
Cisco Systems MCS-7845-H1-RC1
Cisco Systems MCS-7845-H1-S31
Cisco Systems MCS-7845-H1-UC1
Cisco Systems MCS-7845-H2-CCE4
Cisco Systems MCS-7845-H2-CCX1
Cisco Systems MCS-7845-H2-IPC2
Cisco Systems MCS7845H2-K9-CMB1D
Cisco Systems MCS7845H2-K9-CMC1
Cisco Systems MCS7845H2-K9-UCB1
Cisco Systems MCS-7845-H2-MOB1
Cisco Systems MCS-7845-H2-PSBU
! NEW IN BOX ! Cisco WS-C4500X-24X-ES Catalyst 4500-X 24 Port 10G Ent. Services
Cisco 76-ES+XC-40G3C 10GigE SFP XFP Line Card 20x1GE + 2x10GE
CISCO (WS-C3560X-48P-L) CATALYST 3560X 48 PORT POE LAN BASE WS-C3560X-48P-L
CISCO N7K-F248XP-25 NEXUS 7000 ENHANCED GIGABIT
Cisco Systems SM-X-1T3/E3
Cisco UCSC-C240-M3S 8x 300GB 6Gb SAS, Xeon E5-2667v2, 32GB (4GB) DDR3 1600MHz
CISCO AIR-CT5760-HA-K9 5700 SERIES WIRELESS CONTROLLER
Cisco WS-C4500X-24X-ES Catalyst Switch 24 ports 1YearWarranty 2+Available
NEW SEALED Cisco ME-3600X-24TS-M Ethernet Access Switch 1YearWarranty 2+Avlable
Cisco 15454-CE-MR-10 10-Port Multirate Ethernet Card 1YearWarranty 2+Available
Cisco SCE1010-2XGBE- SM Control Engine SCE1010-2XGBESM 1YearWarranty 2+Available
Cisco UCSC-C240-M3S 2x 600GB 6Gb SAS, 2x Xeon E5-2667 V2, 64GB RAM 1866 MHz
NEW IN BOX CISCO WS-C3850-12XS-E 12Port 10G Fiber Switch IP Services *SHIP FAST*
CISCO N7K-SUP2E
~NEW SEALED~ CISCO ASR1002-X ASR Series Router ~FAST DELIVERY~
*New In Box* Cisco WS-C3850-12XS-E Switch * Fast Shipment *
#NEW# Cisco WS-C3850-12XS-E 12 Port Fiber Switch #FAST SHIPMENT#
NEW IN BOX CISCO WS-C3850-24S-E 24PT SFP GE SWITCH 90DAYS WARRANTY **SHIP FAST**
Cisco Systems C2951-VSEC-PSRE/K9
Cisco Systems ASR-9010-DC-V2 | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems AIR-CT5760-25-K9
Cisco Systems CS-MARS-200-K9
Cisco Systems BPX-BXM-622-2DX
Cisco Systems 15454-GE-XPE
Cisco Systems N77-C7710-FAB-2
Cisco Systems ASA5520-AIP20-K8
Cisco Systems MCS-7845-H1-ECS1
Cisco Systems MCS-7845-H1-ECS2
Cisco Systems MCS-7845-H1-IPC1
Cisco Systems MCS-7845-H2-CCE1
Cisco Systems MCS-7845-H2-CCE3
Cisco Systems MCS-7845-H2-CTS1
Cisco Systems MCS-7845-H2-ECS1
Cisco Systems MCS-7845-H2-ECS2
Cisco Systems MCS-7845-H2-ECS3
Cisco Systems MCS-7845-H2-ECS4
New CISCO MCS-7845-H2-IPC1 | incl 19% VAT | 2 years Cybertrading warranty
New CISCO MCS7845H2-K9-CMA2 | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems MCS7845H2-K9-CMB2
Cisco Systems MCS7845H2-K9-UCA1A
Cisco Systems MCS-7845-H2-RC2
Cisco Systems WS-C6503E-S32-10GE incl 19% VAT // 2 years IT4Trade warranty
New Cisco Systems WS-C3850-48PW-S incl 19% VAT // 2 years IT4Trade warranty
Cisco Systems WS-C6503E-CSMS-K9 incl 19% VAT // 2 years IT4Trade warranty
Cisco Systems SM-X-1T3/E3
We buy Cisco **** WS-C4500X-16SFP+ Switch (WS-C4500X)
NEW Cisco WS-C3850-24S-E Catalyst 3850 24 Port GE SFP IP Service Switch
NEW IN BOX CISCO WS-C4500X-24X-ES CATALYST 4500-X 24PT 10G ENT SVC **SHIP FAST**
Brand NEW Cisco C1-C4500X-32SFP+ ONE Catalyst 4500-X 32 Port 10G IP Base Switch
Cisco Nexus 9372PX 48-Port 1/10GbE / 6-Port 40GbE Switch N9K-C9372PX w/2x PS
Cisco Nexus N5K-C5548P-FA 32-Port Network Switch
15454-10GE-XPE
NEW DS-X9448-768K9= 48-Port 16-Gbps Fibre Channel Switching Module 768-K9 NOB
NEW Sealed Cisco WS-C3850-48P-E 48 10/100/1000 Ethernet PoE+ ports Switch
NEW Cisco WS-C4507RE-S7L+96 Cisco WS-C4507R Chassis with Sup7L-E Engine
New Cisco ASR1001-X Router w/ Dual Power & SLASR1-AIS License ASR1001
*NEW SEALED* CISCO WS-C3850-48P-E 48 Port Switch with warranty FAST SHIPMENT
!BRAND NEW IN BOX! Cisco WS-C3850-24S-E 24 Port SFP GE IP Service Switch
NEW IN BOX Cisco WS-C3850-24XU-E CISCO 24PT UPOE MGIG, 1100W, IP SERVICE
New CISCO ASR1001 Router 4 Built-In GE 4X1GE Dual AC Power ASR1001-4X1GE
#NEW# Cisco ASR1002-X ASR Series Router #FAST SHIPMENT#
New Sealed Cisco WS-C3850-12XS-E Catalyst 3850 12 Port 10G Fiber Switch IP Base
CISCO BPX-BXM-622-2DX | incl 19% VAT | 2 years Cybertrading warranty
CISCO N77-C7710-FAB-2 | incl 19% VAT | 2 years Cybertrading warranty
#NEW# Cisco WS-C3850-24S-E 24 Port SFP GE Switch #FAST SHIPMENT#
*New In Box* Cisco WS-C3850-24XS-S Switch * Fast Shipment *
#NEW# Cisco WS-C4500X-24X-ES 24 Port 10GE Enterprise Switch #FAST SHIPMENT#
New CISCO ASR1002-5G/K9 Dual AC Power ASR1002 with 4-built-in GE ports
NEW Factory Sealed Cisco SM-X-1T3/E3 One-port clear-channel T3/E3 Service Module
*New* WS-C3750X-24S-S Catalyst 3750X 24 Port GE SFP IP Base
*Brand NEW* CISCO WS-C3850-24XS-S 24 SFP+ Ethernet ports, w/ 715WAC power supply
New CISCO ASR1002 with 4-built-in GE ports Dual AC Power ASR1002-5G/K9
New Open Box CISCO ASR1001-4X1GE ASR1001 Router Dual AC Power Supplies
NEW Cisco WS-C3650-48PQ-E 48 10/100/1000 Ethernet PoE+ with 640WAC power
#NEW# Cisco WS-C3850-24XS-S 24 SFP Gigabit Ethernet Switch #FAST SHIPMENT#
New Cisco Systems N7K-LAN1K9 | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems ASA5580-20-BUN-K8
Cisco Systems 15454-OTU2-XP
CISCO ASA5580-20-8GE-K9 | incl 19% VAT | 2 years Cybertrading warranty
CISCO 7609S-S32-8G-B-R | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems ASR-9010-DC-V2 | incl 19% VAT | 2 years Cybertrading warranty
CISCO C3925-ES24-UCSE/K9 | incl 19% VAT | 2 years Cybertrading warranty
CISCO C3945-VSEC-PSRE/K9 | incl 19% VAT | 2 years Cybertrading warranty
New CISCO ASR1001-4X1GE ASR1001 Router 4 Built-In GE 4X1GE Dual AC Power
New Cisco Systems A02-M3512GD-64 | incl 19% VAT | 2 years Cybertrading warranty
NEW Cisco ASA5525-FPWR-K9 ASA 5525-X with FirePOWER Services
New CISCO ASR1002-5G/K9 ASR1002 with 4-built-in GE ports Dual AC Power
Cisco ESR-1COC12-SMI Line Card 1YearWarranty 2+Available
Cisco A9K-8T/4-B Expansion module 1YearWarranty 2+Available
Cisco WS-X4724-SFP-E 24-port nonblocking SFP line card
Cisco UCSB-B200-M3 9x 16GB DDR3, 2x E5-2643, 2x 300GB 6Gb SAS 10K RPM
*New Sealed* Cisco WS-C3850-12X48U-S Catalyst C3850 Switch, C3850-NM-4-1G Module
New Cisco Systems ISR4431-SEC/K9 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems WS-C3850-48F-E | incl 19% VAT | 2 years Cybertrading warranty
*New In Box* Cisco C1-C4500X-32SFP+ Switch *Fast Ship*
New Cisco Systems WS-C3850-48F-S incl 19% VAT // 2 years IT4Trade warranty
New Cisco Systems WS-C3750E-24TD-E incl 19% VAT // 2 years IT4Trade warranty
Cisco ASR1002-5G/K9 Gigabit CPE Edge Router - 1 Year Warranty - £5000 ex VAT
Cisco WS-X6708-10G-3CXL 10Gig Line Card - 1 Year Warranty - £5000 ex VAT
Cisco UCS5108 + 8x B200 M2 Blade Servers 16x SIX-CORE 2.40GHz,192Gb RAM,10Gb VIC
NEW CISCO CFP-40G-FR Cisco 40GBASE-SR4 CFP Module
CISCO - WS-C4500X-16SFP+ - C4500-X 16 Port 10G IP Base, Front-to-Back, No P/S
New Cisco Systems ASA5515-IPS-K9 incl 19% VAT // 2 years IT4Trade warranty
CISCO PRIME-NCS-APL-K9 | incl 19% VAT | 2 years Cybertrading warranty
Cisco 7600-ES+20G3CXL 7600 20 Port SFP Gigabit Ethernet Plus 20G 7600-ES+3CXL K
NEW Cisco ASR1001-X Router w/ Dual Power ASR1001 AC & SLASR1-AIS License
New CISCO WS-C3650-48FWQ-S | incl 19% VAT | 2 years Cybertrading warranty
New CISCO C3925-WAASX-SEC/K9 | incl 19% VAT | 2 years Cybertrading warranty
CISCO PRIME-NCS-APL-K9 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems L-ASA-UC-750-1K | incl 19% VAT | 2 years Cybertrading warranty
Cisco ASR1004 4-Slot Chassis w/ AC PWR, ASR1000-ESP20, ASR1000-RP1 Bundle
Cisco WS-C3850-12X48U-E 48-Port UPOE w/ 12X 1/2.5/5/10GB Ports - 1 YEAR WARRANTY
Cisco UCSC-C240-M3S 12x 300GB 6Gb SAS, Intel E5-2667 v2/130W, 48GB
Cisco ASR-903 Router w/ FAN ASR903 Chassis A903-FAN with Accessory cards
CISCO A9K-40GE-E 40PORT GE EXTENDED LINE CARD, 3 YR WARRANTY
NEW IN BOX CISCO WS-F6K-DFC4-EXL Distributed Forwarding Card 6500 *SHIP FAST*
Cisco ASR1002-X 6XGE-BUILT-IN Crypto 4GB DRAM Dual ASR1002-PWR-AC KAJ