CR120A25244
日期：2020-7-9
问：我西门子S7-300PLC报故障，请帮我讲解一下硬件故障诊断的操作步骤
答："可以利用CPU诊断缓冲区进行详细故障诊断，方法如下：首先建立电脑与PLC的总线连接，在SIMATIC管理器中选择要检查的站（如SIMATIC-300（1）），执行菜单PLC/Diagnosis/Setting（诊断/设定）/Module Information（模块信息），在模块信息窗口的“Diagnostic Buffer”（诊断缓冲区）选项中，给出了CPU中发生的事件列表，选择“Events”（事件）中某一行，下面灰色的“关于事件的详细资料”窗口将显示该事件的详细描述。你可以选择左下角“Save As”(另存为）把故障信息保存到你的电脑硬盘某个目录下，然后打开该文件，将会看到对每个事件的诊断信息，对判断故障很要帮助。"
问：STEP 7-MicroWIN测试程序时是写入方便还是强制方便？它们之间有啥区别？
答：写入的会随时变化，受到程序影响，字，双字、浮点数等数字的时候用的多；
强制在程序中不受其他条件的影响，常用于位的控制
写入可以一次写入多种类型数据，强制一次一个数据
问：西门子S7-200程序如果子程序加密了，下载至PLC后再上载这个密码还会有吗？
是不是从PLC里上载的程序不可能带任何密码（包括单独对内部部分程序块加密）？即使程序加密后再下载至PLC，一上载这个密码会不会自动清除？
答：如果子程序加密了，上载一定会有,子程序还是子程序，库是库；
除了程序打开密码与下载无关之外，其余的系统、子程序、库、等只要设定的或自动生成带的密码，下载后上载，还是一样的
另外，4级密码（CN版的）上载都不允许
问：西门子S7-400PLC主站，用DP网络，中间有十个ET200S和6个MP177A触摸屏，在正常生产过程中，我要修改其中的一个触摸屏的程序，所以，涉及到断电重新上电的过程以及，把屏的DP接口暂时拔掉，请问这样做会影响CPU工作吗？屏在DP中间网络，不是在终端，谢谢！
答：把屏的DP接口暂时拔掉,请问这样做会影响CPU工作吗？屏在DP中间网络，不是在终端?
将把屏的DP接口暂时拔掉会引起BF(总线故障），随之引起SF（系统故障）。如果CPU程序块里面需要添加一些对应的OB组织块（只需建立，不需编程），CPU不会停机的，但此时通讯是中断的。这些组织块是：
OB81 电源故障
OB82 诊断中断
OB83 插入/拔出模块中断
OB85 优先级错误
OB86 扩展机架，DP主站系统或者分布式I/O故障
OB87 通讯故障
OB121编程错误
OB122 I/O访问错误
问：西门子S7-300系统我数字量输入模块用220V的，数字量输出模块用24V的可以吗，不统一
答：1 。完全可以的。外部电源之间是独立的。
2 。 这样做，你自己要注意交流电源， 直流电源之间不要串接，错接线的问题。
问：我按照快速调试做了调试后然后将3900调到了出厂默认，再启动变频器带的电机只朝一个方向走。我直接在变频器的端子上短接公用线和正传，反转。也只有一个方向有反应。请问是不是变频器坏了，还是调试有问题。调试之前工作很正常。
答：我按照快速调试做了调试后然后将3900调到了出厂默认
------------------------ 出厂设置的电机反向是禁止的，所以你恢复出厂设置以后变频器无法反转！！！
-------------------------你看一下参数P1110=1即可，出厂设置此参数P1110=0,是禁止反向运行！！
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【主营产品】
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Logix5000/1756/1789/1794/1760/1788、PLC-5/1771/1785等。
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6：ABB：工业机器人备件DSQC系列、Bailey INFI 90等。
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Cisco CP-PWR-CUBE-3 Phone 48V 0.38A Power Supply AC Adapter f. 7940 79 neu OVP
Cisco C3KX-NM-1G 4-Port Gigabit Ethernet Network Module-3560X/3750X
CISCO 1751 ROUTER W/WIC 1DSUT1 CARD & POWER SUPPLY
Lot of 3 Cisco IP Phone CP-7962G Unified VOIP Phones. current FW
Linksys Cisco SRW208 8 Port Fully Managed Switch For a Small Busness 10/100Mbps
Cisco 73-10224-05 WS-CF-UPG SP CompactFlash Boot Disk Flash Adapter SUP720 6500
CISCO C3KX-NM-10G CISCO 10GbE NETWORK MODULE FOR 3560X/3750X
New Cisco Dell IronPort SMA-M670-K9 M670 Security Management Appliance
Cisco CCNET CCNA CCNP R&S LAB KIT W/ Power Supply & FREE RACK
Cisco CP-7962G 7962 SCCP VoIP IP Telephone Phone PoE
New Cisco Linksys SR224 24-Port 10/100 Switch Rack Mountable Wall Desktop
Cisco XFP 10 G-LR 10GBASE Module
New Cisco Meraki MX64 Wired 5xGbE Security Appliance AND 3 Year Advanced License
HP Procurve J9627A 2620-48-PoE+ 48-Port PoE Gigabit Switch 10/100 Base Rack Ears
Cisco HWIC-3G-HSPA-A= 800-32782-03 WAN Interface Card HSPA HSDPA UMTS OVP NEU
Cisco WS-C3750-24TS-E V08 24-Port 10/100 + 2x SFP-Based GigE Switch Gigabit
MEM-870-64D 64MB Dram Cisco 871 871w 877 877w 878 878w 876 851 851W 857 857W
Cisco WS-C3850-48F-S (Brand New Sealed) with C3850-NM-2-10G / Cisco 3850
New Cisco Genuine EHWIC-1GE-SFP-CU 1 Port Dual Mode SFPExpansion Router Modules
Cisco R250-FAN5= 74-6969-02 Lüfter Modul 2x 6-pol für UCS C250 M1 M2 OVP NEU
Cisco Linksys SR224G v2 24 Port Switch 2 Gigabit 2 miniGBIC 2+
SRPIPOC12SMI Cisco 7200/7500 Series 1-Port Dual-Width OC-12 Intermediate Rang
BRAND NEW SEALED GENUINE CISCO SFP-10G-SR TRANSCEIVER MODULE
BRAND NEW SEALED GENUINE CISCO GLC-FE-100BX-D 100BASE-X TRANSCEIVER MODULE
BRAND NEW SEALED GENUINE CISCO GLC-SX-MMD 1000BASE-SX MMD SFP TRANSCEIVER MODULE
Cisco IP/TV 3425 Video Broadcast Server IPTV-3425-BC
BRAND NEW SEALED GENUINE CISCO GLC-ZX-SM 1000BASE-ZX SFP TRANSCEIVER MODULE
BRAND NEW SEALED GENUINE CISCO SFP-10G-ZR TRANSCEIVER MODULE
Cisco Catalyst WS-C3750-48PS-S 48 Port PoE Switch
BRAND NEW SEALED GENUINE CISCO GLC-GE-100FX 100BASE-FX SFP FOR GE SFP PORT
BRAND NEW SEALED CISCO 1000BASE-ZX SFP TRANSCEIVER MODULE SFP-GE-Z
BRAND NEW SEALED CISCO X2-10GB-LR 10GBASER-LR X2 MODULE
BRAND NEW SEALED CISCO 10GBASE-LR SFP TRANSCEIVER MODULE SFP-10G-LR
BRAND NEW SEALED CISCO 1000BASE-T SFP TRANSCEIVER MODULE SFP-GE-T
BRAND NEW SEALED CISCO 1000BASE-BX SFP TRANSCEIVER MODULE GLC-BX-U
WS-C2960X-48LPD-L CATALYST ETHERNET SWITCH 48POE LAN BASE (370W) **SHIP FAST**
Cisco HWIC 4ESW
*Lot of 4* Cisco WS-G5484 (30-0759-01) 1000Base-SX Gigabit SFP GBIC Modules
Cisco ASA5512-K9 Security Appliance
Cisco ASA 5520 VPN Plus Appliance Firewall 2GB RAM/ 256MB Flash VPN License Plus
Cisco Catalyst 2950
BRAND NEW SEALED CISCO GLC-T 1000BASE-T SFP TRANSCEIVER MODULE
BRAND NEW SEALED CISCO CWDM-SFP-1570 40KM TRANSCEIVER MODULE
Cisco TwinGig Converter Module CVR-X2-SFP-V02
Cisco Catalyst (WS-C3750-48PS-S-RF) 48-Ports Rack-Mountable Switch Managed...
BRAND NEW SEALED GENUINE CISCO GLC-ZX-SMD 1000BASE-ZX SMD SFP TRANSCEIVER MODULE
Cisco Catalyst (WS-C3750X-24T-E) 24-Ports-Ports Rack-Mountable Switch Managed
Cisco ASA-5505 Security Plus License 25 Peers VPN Trunk 8x 25 Peers 47-1870-04
413980-001 - HP Proliant DL385 DL380 VRM - 407748-001 Cisco MCS 7800
Cisco 64MB Compact Flash Memory Card CF CompactFlash 16-2735-01 SDCFB-64-845
Genuine Cisco WS-X3500-XL GigaStack GBIC with CAB-GS-50CM Cable
408790-001 HP CPU Heatsink for Proliant DL380 G5 DL385 G5 Cisco MCS 7800
HP Proliant DL380 G5 Hot-Plug Fan (or Lot) 394035-001 TA225DC Cisco MCS 7800
HP Proliant DL380 G5 Hot-Plug Fan (or Lot) 394035-001 TA225DC Cisco MCS 7800
Cisco IAD2400 Series Router
CISCO X2-10GB-SR V05 10GBASE-SR X2 MODULE 10-2205-05 qty
BRAND NEW SEALED GENUINE CISCO GLC-FE-100FX 100BASE-FX SFP TRANSCEIVER MODULE
BRAND NEW SEALED GENUINE CISCO GLC-ZX-SM-RGD 1000BASE-ZX SFP TRANSCEIVER MODULE
BRAND NEW SEALED CISCO CWDM-SFP-1590 40KM TRANSCEIVER MODULE
BRAND NEW SEALED GENUINE CISCO GLC-FE-100EX 100BASE-EX TRANSCEIVER MODULE
Genuine Cisco OC-48SR 10-1421-02 1310NM SFP
Cisco 2960S-24 TS S, Fully Managed, Layer 2, Rackmounted
BRAND NEW SEALED GENUINE CISCO GLC-FE-100BX-U 100BASE-U TRANSCEIVER MODULE
BRAND NEW SEALED CISCO GLC-LH-SM 1000BASE-LX/LH SFP MODULE
Cisco N2XX-AIPCI02= 74-6930-01 Gigabit Netzwerkkarte PCIex4 LowProfile OVP NEU
BRAND NEW SEALED CISCO 1000BASE-LX/LH SFP TRANSCEIVER MODULE SFP-GE-L
Cisco WS-C2940-8TT-S Catalyst 8-Ports Ethernet & 1-Port Gigabit Switch Managed
Lot of 2 - Cisco XENPAK-10GB-LR (10-1838-03-XENPAK-10GB-LR) Tranceiver -
Cisco 1760 1900 2900XL 3500XL 19"/24" Rack Mount Kit STK-RACKMOUNT-1RU
Cisco GLC-T 800-24312-02
Cisco WS-C4500X-16SFP+ 10GbE Switch Please Read Description C4KX-PWR-750AC-R
Cisco 2911-SEC/K9 Security Router W/ IP BASE 3 GE Ports CISCO2911-SEC/K9 DATA
CISCO GLC-SX-MM V04 SFP TRANSCEIVER MODULE
INTEGRAOPTICS SFPP-SR-10GD CISCO COMPATIBLE SFP-10G-SR
Cisco Aironet 6dBi Dual Band MIMO Patch Antenna AIR-ANT2566P4W-R Quad RP-TNC
Cisco WS-C3650-24PS-S Catalyst 3650 24 Port PoE Ethernet Switch [10E]
INTEGRAOPTICS SFP-SX-D CISCO COMPATIBLE SFP-SX-DE-CSCO
Cisco CP-7940G IP Phone - SIP - SCCP - Grade A/B - Lot of 10
Cisco CP-7940G IP Phone with CP-PWR-CUBE - SIP - SCCP - Grade A/B - Warranty
Cisco CP-7940G IP Phone - SIP - SCCP - Grade A/B
Cisco ASA-5505 Security Plus License 25 VPN Peers 2 SSL VPN Peers 47-1870-04
NEW! Cisco HWIC-D-9ESW 9 Port HighSpeed Network Module Interface Card switch box
Cisco Linksys SR224 2.0 24 Port 10/100 Switch Business Series
Cisco 2911-V/K9 VOICE UCK9 License router CISCO2911-V/K9 vpn ssl security
CISCO891-K9 Cisco 891 Gigabit Ethernet Security Router w/ power adapter /cable
CISCO 800 828 ROUTER ETHERNET 10/100 MODULAR ACCESS DATA
Cisco JBL WS-X4148-RJ45V 48 Ports Plug in module Ethernet Switch Catalyst 4500
Cisco Voice Network Modules NM-1V for router and VIC cards
Cisco PCEX-3G-HSPA-G 74-7532-01 Radio Modem HSPA HSDPA UMTS EDGE GPRS OVP NEU
Cisco 800A Series Fast Ethernet Router Model 837 4 Ethernet/ 1 Console/1 ADSL
CISCO - HW ROUTERS L/M CISCO1941W-A/K9 1941 ROUTER W/ WL ABGN FCC
CISCO WS-C2960S-24TS-L
Cisco EADP-18CB Power Supply
CISCO CP-PWR-CUBE-3
Cisco WS-G5486 WSG5486 WS G5486 CNUIAFLAAC GBIC Transceiver Fibre Channel NEU
BRAND NEW SEALED! Cisco 4400 Series WLAN Controller AIR-WLC4402-25-K9
CISCO Aironet Power Injector DPSN-35FB A
Cisco Systems Catalyst 2900 Series XL -
Cisco A9K-MPA-20x1GE ASR 9000 20 Port 1GE Modular Port Adapter GbE SFP Module
Cisco 1800 Series With Compact Flash Card And Power Cable
New Cisco 7940G Unified IP Office Business Telephone VoIP Phone
Cisco WS-C3750V2-48TS-S Ethernet Switch
Cisco WS-C3750V2-24TS-S Ethernet Switch
Cisco NM-2V Two Voice/Fax Interface Card Slot Network Module 1 Year War. Qty 25
Cisco WS-C3750-24TS-S
Lot Of 2 Cisco Systems FBR-STRG Fiber Storage
Cisco Catalyst (WSC355048SMI) 48-Ports External Switch Managed stackable
Cisco Catalyst (WS-C3750-24PS-S) 24-Ports Rack-Mountable Switch Managed...
Cisco Catalyst 3560G WS-C3560G-24PS-S V08 POE-24 Switch w/Rack Mount Ears GB-24
Cisco VS-S720-10G-3C * Make Best Offer* Tested/Working/30 day warranty
Cisco 1m Stack Cables
Cisco 2525 Router 16 MB/s 3x LAN 1x Token Ring IEEE 802.5 SNMP RMON +Zubeh?r NEU
Cisco XENPAK-10GB-LR+ 10-1838-04 10Gbe 10km Fiber Transceiver VAT INC
Cisco Catalyst 3750G Series WS-C3750G-48TS-S 48-Port Gigabit Switch --Free SFP
CISCO 2960G WS-C2960G-24TC-L 20 Ethernet 10/100/1000 ports Catalyst Switch
CISCO AIR-AP1252AG-A-K9 Wireless Access Point AP AP1252 LWAPP
CISCO AIR-AP1231G-E-K9 - inkl. VAT
NEW Leoni 0.5 Meter Bladestack Cable Assembly 37-0891-01 L45593-E 101-D (Sealed)
Cisco SF300-24 24-port 10/100 Managed Switch
CISCO SWITCHING MODULE - SWITCH - 48 PORTS MANAGED PLUG-IN MODULE WS-X6348
Cisco CP-8945-K9 VOIP 8945 IP video phone $$ + power adapter
Cisco XFP-10GER-192IR+ Multirate 10GBASE-ER + OC-192/STM-64 IR-2 XFP 10-2470-01
Cisco WS-X6408A-GBIC 8-Port Gigabit Ethernet Switch Module
CISCO PWR-7201-AC 150W AC Power Supply for 7201 Routers zq
Cisco7304 Router with 7304-NPE-G100 4-SLOT 1GB Dram
CISCO WS-C4506-E + WS-X4515 + WS-X4148 + WS-X4306-GB + 2x 1300W PWR
Cisco GSR10-DC-PDU DC Power Distribution Unit 2400W 34-1863-01 12010
NEW Cisco PWR-C49E-300AC-F Power Supply WS-C4948E-F
Finisar FTRJ8524P2BNV SFP Transceiver Genuine
Cisco 1841 V03 Router w/ WIC-1DSU-T1 128MB/32MB DRAM/Flash
Cisco 6000/6500/7600 WS-X6182-2PA FlexWAN Module
Cisco ASA5580-PWR-AC 800W Power Supply Security ASA 5580 Appliance
Cisco 7603-S Router chassis with fan FAN-MOD-3SHS
CISCO CESSE-1150-19-K9 Building Broadband Service Manager
NEW Cisco F5 F5-UPG-AC-300W-R 300W AC Power Supply 1600 3600 3900
CISCO 4OC3X/POS-IR-LC-B - GSR 12000 4-port OC3/POS IR Eng3 B
Cisco ASA5580-4GE-FI Gigabit Ethernet Fiber Interface Card ASA 5580 4-port 4GE
Cisco IPS4270-20-K9 Intrusion Prevention Sensor
Cisco PWR-GSR10-DC Power Supply GSR12410 2400 Watt DC 34-1652-01 TDI SPS5476
NEW Cisco PWR-ME3750-AC Metro Catalyst 3750 AC Power Supply
Genuine Cisco Nexus N7K-C7010-FAB-1 Nexus 7000 Fabric Module
NEW Cisco IPS-2X10GE-SR-INT IPS-4260 IPS-4270-20 2-Port 10Gigabit Ethernet Card
Cisco 12006E-SFC Enhanced Switch Fabric Card for Cisco 12006 SFC-12006E
Cisco MP-3545 Unified Media Server 3545 System EMP
Finisar FTRJ8519P1BNL SFP Transceiver Genuine
New Sealed Cisco WAVE-594-K9 Wide Area Virtualization Engine w/ WAVE-INLN-GE-4T
Cisco IPS-2X10GE-SR-INT IPS-4260 and IPS 4270-20 2-Port 10Gigabit Ethernet Card
Cisco OSM-2OC12-POS-SI+ 2-port OC-12/STM-4 POS Optical Service Module
Cisco ASR-9922-RP-SE 12GB Route Processor for Service Edge ASR
CISCO WS-X6348 48 PORTS RJ45
CISCO ASA-SSM-AIP-40-K9 - ASA 5500 Security Services Module SSM-40
Cisco ME-3400G-2CS-A Switch #2
Cisco ME-3400G-2CS-A Switch #1
Cisco CISCO2511 2500 Series AC PWR Access Server Router
Cisco Aironet 4dbi Dual Band MIMO Omnidirectional Antenna AIR-ANT2544V4M-R8
Cisco PEM-DC.... DC POWER ENTRY MODULE FOR CISCO 7606
Cisco 7600 4000W DC Power Supply PWR-4000-DC V03
Cisco WS-F6700-CFC v06.... Centralized Forwarding Card Module
Cisco X2-10GB-LR Optical Transceiver Module VAT INC
Cisco 7960 CP-7960 IP Office Business Telephone VoIP Phone
Cisco Meraki MS-220-8P W/3 Year License
CISCO CATALYST 6500 SERIES WS-X6K-S2U-MSFC2 SUPERVISOR 2
CISCO CP-7970G VoIP PoE COLOR LCD TOUCH SCREEN PHONE 7970G
Cisco SFP-10G-LR 10GBASE-LR SFP+ transceiver module VAT INC
Cisco ASA 5505 Series Adaptive Security Appliance/ AC Adapter Charger-Free P&P
CISCO XFP-10GLR-OC192SR SFP TRANSCEIVER MODULE GBIC VAT INC
Joblot of 7 x Cisco Routers 3725, 3640
CISCO WS-C3750G-48TS-S 48-Port GIGABIT SWITCH + 4 SFP - DAMAGE STACKING PORT
Cisco DX650
Cisco Aironet Power Injector LR1 AIR PWRINJ-BLR1 1410 1400 Outdoor Access
Cisco Systems WS-X6248-TEL 48-Port Telco
cisco glc-sx-mm
Cisco 2821/2851 Internal IP Power Cable
CISCO CATALYST WS-C3508G-XL-EN 8 GBIC PORTS AGGREGATION SWITCH
Cisco CP-8831-K9= Unified IP Conference Phone Base and Control Unit
NEW Cisco 7925 Wireless IP VoIP Telephone Phone (CP-7925G-A-K9)
Linksys Cisco Wireless G Printserver with Multifunction Printer Support
Cisco 7975G IP Phone
Cisco 2651 2600 Multiservice Router 32F 1x WIC-1B-U NO RACK EARS INCLUDED
Cisco 2650XM 2600 Multiservice Router 32F NO MODULES OR RACK EARS INCLUDED
Cisco Route Switch Processor 4 Module Card Blade
RACK 19" Einbauwinkel | 1 Paar | 1HE | Winkel & Schrauben | z.B. Cisco | (B)
Genuine Cisco EHWIC-VA-DSL-M, 1 port VDSL2 / ADSL2+ over POTS 73-13412-02
RACK 19" Einbauwinkel | 1 Paar | 1HE | Winkel & Schrauben | z.B. Cisco | (A)
Joblot of 16 Cisco Switches 2950, 2912, 2924
CISCO CATALYST 3650 48 PORT POE - WS-C3650-48PS-E
CISCO ASA 5505
CISCO WIC 1B S/T WIC 1B S/T LL
Cisco IE-3000-8TC Industrial Ethernet Switch with Power Expansion Module
B0084805 SWITCH CISCO CATALYST 2960S 48 GIGE POE 370W 4 [WS-C2960S-48LPS-L]
Cisco 1800 Series Router w/ 32MB Flash Card
B0019775 SWITCH CISCO-LINKSYS 8 PORTE SRW2008-K9-G5 [SRW2008-K9-G5]
Cisco WIC-1T (N96-K075-0) 1x Serial WAN Interface Card
Cisco 1700 series Router Ethernet Network Router
Joblot of 20 x Cisco Routers 2610, 2651, 2620, 2611XM
Cisco ASA5520-VO2 Rackmount Adaptive Security appliance VPN Plus license..
Cisco WIC-2T 2-Port Serial WAN Interface Card
Cisco WIC-2T 2-Port Serial WAN Interface Card
Cisco 830 Series/SOHO 90 Series Power Supply
Cisco WIC-1ADSL WAN Module
Cisco Systems HWIC-4ESW 73-8474-06 A0 4-Port PoE Module
Cisco ASA5515-K9 6 Port GigE ASA 5515-X Firewall Edition 250 IPsec VPN 3DES/AES
Cisco Aironet 802.11G/N 2.4GHz Radio Module, AIR-RM1252G-A-K9
CISCO 2951 ROUTER 2951/K9 V06 C2951-UNIVERSALK9-M - 2900 series
Cisco ASA 5505
CISCO WS-C3750G-48PS-E SWITCH 3750G Series 10/100/1000 IEE802.3af 4 x SFP PORT
Cisco Aironet 1250 Series 802.11a/n 5GHz Radio Module
cisco fast hub 400 series ethernet switch router
CISCO ROUTER 1841 CON SERIALE WIC 1 ADSL E SERIALE WIC 1T COMPLETO DI CAVI
Cisco 7910G One Line Unified IP Phone
CISCO L-ASA-CSC10-PLUS BRAND NEW SEALED SOFTWARE WITH SERIAL NUMBER SECURITY
Cisco WS-C2960-24TC-L Catalyst 2960 24 10/100 + 2t/sfp Lan Base Image
Cisco C897VAW-E-K9 WIRELESS Router, VDSL/ADSL2+ Modem,2nd Gig WAN + SFP, 8xGig E
Cisco Aironet 1100 Series Wall/Ceiling Mount, AIR-AP1100MTNGKIT
Cisco C897VAM-E-K9 Router, VDSL/ADSL2+ Modem, 2nd Gig WAN + SFP, 8 x Gig Etherne
Cisco TwinGig Converter Module CVR-X2-SFP V02
Cisco C887VAM-SEC-K9
Cisco 2651 equipaggiato con scheda 4A/S
Cisco 7925G Unified Color Wireless VOIP Phone, CP-7925G-A-K9
Cisco 7200VXR Gigabit Network Processing Engine, NPE-G1
Cisco Switch SD208 Small Buisness 8-Port 10/100 Brand new boxed
Cisco Catalyst (WS-C3750-24PS-S) 24-Ports Rack-Mountable Switch Managed...
ASA5505-MEM-512 512MB memory for Cisco ASA5505 New
Cisco SCE2020 4XGBE-MM
3 x Cisco Catalyst 2950-24 (Catalyst c2950-24) 24-Port 100Mbits Ethernet Switch
Cisco Systems PIX 501 Series Networking Firewall
Cisco Linksys SPA942 Handset
Cisco 2911 Router with Voice/Security Bundle, C2911-VSEC/K9
Cisco 2821 Integrated Services Router with Inline Power
Cisco Catalyst 2900 Series 48 Port Switch, WS-C2950SX-48-SI
Cisco 2811 Security Bundle with IOS Advanced Security Image
CISCO IE2000-8TC-G-N 8FE, 2GE (NO WARRANTY)
Cisco Catalyst 2948G 48 Port 10/100 Switch, WS-C2948G
CISCO N55-M16UP 16 Port Expansion Module
Cisco 887VA-M-K9
Cisco 3560X/3750X 1100WAC Power Supply
Cisco 860VAE Router
Cisco PIX 501 Firewall Bundle, PIX-501-BUN-K9
Cisco Catalyst 2960X Series FlexStack-Plus Module, C2960X-STACK
Cisco EHWIC-4ESG= 4-Port Gigabit Ethernet Enhanced High-Speed WA
Cisco 1-Port T1 WAN Interface Card HWIC Module
Cisco 4400 Wireless Land Controller
ProCurve 2810-24G (J9021A)
Cisco IP Phone 7911
Cisco IP Phone 7941
CISCO CATALYST 3850 24 PORT POE IP BASE
CISCO CATALYST 3850 24 PORT GE SFP IP BASE
Cisco 3560 Compact Series 8GE Port PoE+ Switch,WS-C3560CG-8PC-S
Cisco 1RU Accessory Kit (RCKMNT-1RU Kit, Console & AC Cord)
Cisco 3750X Swiches Accessory Deployment Pack
Cisco Catalyst 2900 Series 24 Port Switch, WS-C2950SX-24
Cisco Router ISDN 800 Series
Cisco 8845 IP Phone - Charcoal CP-8845-K9
Cisco SFP 10G LR
Cisco WS-C3560CX-8PC-S Layer 3 switch, 8x PoE+, 2 x GiGe, 2 x 10Gig Uplinks
Set of 2 Cisco Systems GigaStack GBIC WS-X3500-XL W/ Cable
Cisco 867VAE-K9 G2 Security Modem / Router, BRAND NEW, SEALED BOX
CISCO CATALYST 3560G WS-C3560G-48PS-S POE GigabitSwitch+Rackm kit
CISCO 2921 K9 512MB/256MbF VPN 3xGE PoE+SM-ES2-24-P PoE Router IOS 15.1, Rackm
Cisco Small Business 200 Series SLM2048T-NA Smart SG200-50 Gigabit Switch
Cisco WS-C4948-10GE 4948-10GE 48-Port Gigabit L3 Enhanced Switch
Cisco VWIC2-1MFT Multiflex Trunk WAN Voice Card 73-8483-05 Module 1-Port
CISCO X2-10GB-LR V04
LINKSYS Etherfast 10/100 5 Port Workgroup Switch EZXS55W Cisco Systems
Cisco Catalyst 6500 WS-C6513 13-Slot Networking Switch Chassis +8x WS-X6148-RJ45
CISCO CATALYST 3550 WS-C3550-24-EMI (Z2)
Cisco Catalyst 6500 Series WS-C6509 9-Slot Networking Switch Chassis Mainframe
Cisco Catalyst WS-C4506 6-Slot Switch Chassis WS-C4500 +Power Supply Unit #2
CISCO CVR-X2-SFP V02
Cisco Catalyst WS-C4506 6-Slot Switch Chassis WS-C4500 +Power Supply Unit #1
Cisco Power Supply 341-0048-03 for WS-C3750G-12S C3750G-24T C2970G-24T Switch
Cisco C3K-PWR-265WAC V01 Power Supply PSU for Catalyst 3750-E 3560-E Switch
^^ Cisco WS-CE500G-12TC Catalyst Express 500G Series 12-Port Managed Switch
Cisco PXM1-2-T3E3 1.2gbps Control Processor Switch Plug-In Module BAA35LTBAA
MEM-XCEF720-1G 1GB APPROVED DRAM MEMORY for CISCO 6500 DFC3A MEM-XCEF720-1GB
Cisco PXM1-1-622 1.2gbps Control Processor Switch Plug-In Module BAA35KTBAA
Cisco Systems 74-10617-01 2-Port SAS Controller Card Unit Plug-In Module
*NIB* CISCO NM-1A-T3, 1 Port DS3 ATM 3600 WAN Coaxial BNC, 45 M
Cisco UCS-RAID-9266CV LSI MegaRAID SAS Controller Card Unit Plug-In Module
Cisco Catalyst 3550 Series WS-C3550-12G Switch
Cisco PXM1 1.2gbps Control Processor Switch Plug-In Module BAI9W00AAA
Cisco Catalyst 2960 Series 24 Port Network Switch. WS-C2960-24TC-L V03
Cisco Catalyst 2960 Series 24 Port Network Switch. WS-C2960-24TC-L V03
Cisco 7206VXR W/ NPE-300, UBR7200-I/O-FE 7206 VXR Rack-Mountable ** NO RESERVE**
Cisco PRP-2 Performance Route Processor 2 Ethernet Switch Module NO RAM GSR #2
LOT 32 Cisco Omnidirectional Antennas w/ RP-TNC AIR-ANT5959 2.4GHz 2dBi
Delta DPSN-150BP Power Supply for Cisco WS-C3750G-12S-E C3550-48-SMI
Cisco Systems Omni Antenna AIR-ANT2451V-R 2.4-5GHz 2-3dBi RP-TNC
Genuine Cisco XENPAK-10GB-LR
Cisco WS-C3750-48PS-E V06 48-Port 10/100 PoE Switch 3750-48
Cisco Nexus N7K-M108X2-12L line card
*NEW SEALED* CISCO EHWIC-1GE-SFP-CU Enhanced HWIC, Dual Mode 1 port SFP/Copper
Cisco Pix 515E Firewall
Cisco Systems 73-11474-01 A0 2-Port Two-Slot SFP Mini-GBIC Card for Switches
Linksys Cisco SRW208 8 Port Switch For a Small Busness Fully Managed 10/100Mbps
==CISCO WS-CISCO WS-C3560X-48P-S FULLY TESTED - 48 Port == PoE+ 1GB switch 715W
CISCO PIX SERIES PIX-506 (MISSING FRONT FACE PANEL)
Cisco GESM 371098-001 16-Port Gigabit Switch Blade HP 371098-001 368285-001
Cisco 5508 Wireless Controller AIR-CT5508-K9 85 AP Licenses
CISCO IAD2431-8FXS INTEGRATED ACCESS DEVICE IAD2400
Cisco 5508 Wireless Controller AIR-CT5508-K9 17 AP Licenses
Cisco Catalyst 3500 XL Series Switch WS-C3524-XL-EN 3500XL
Cisco 5508 Wireless Controller AIR-CT5508-K9 12 AP Licenses
Cisco WS-C2960S-48LPS-L POE Switch
Cisco SPA232D-G1 SIP VoIP Multi-Line DECT Ethernet RJ45 ATA FXS FXO LAN WAN
Cisco Supervisor 2 Module WS-SUP2-2GE
NEW Cisco SG300-52MP-K9-NA SG300-52MP Layer 3 Switch SG300 52 Port Gigabit Max
CISCO CATALYST 3500 SERIES XL WS-C3524-XL-EN
LOT OF 4 CISCO GBIC 1000 BASE-SX Fiber Transceiver Cisco 30-0759-01
Cisco WS-C1924 EN 24-Ports External Switch
Cisco 520 Series Wireless LAN Controller AIR-WLC526-K9 - See Description
NEW SG300-52MP-K9-NA SG300-52MP Layer 3 Switch SG300 52 Port Gigabit Max PoE
Cisco FSP-II/1/WDM Metro 1500 series WDMM-F2-AC-SB-E1-ZII WDMM-F2-BC-SB-E1-Z11
Hynix HMT31GR7BFR4A-H9 Cisco Labeled 8GB Memory Ddr3-1333Mhz Rdimm/Pc3-10600
Cisco 3945E-V/K9 (Brand New ) Cisco 3945
NEW Cisco PWR-RPS2300 Cabinet, w/ C3K-PWR-1150WAC, BLNK-RPS2300 & CAB-16AWG-AC
Genuine Linksys Cisco Ac Adapter M1-10S05 5.0V 2.0A Power Cord
Cisco WIC-2T 2-Port T1 WIC Card
CISCO UCS B200 M3 BLADE 2x EIGHT CORE E5-2690 2.9GHz 64GB RAM 2x 300GB 10K SAS
Cisco HWIC-2FE 2-Port Fast Ethernet High Speed WAN Interface Card
CISCO WS-C4948E-F V03
Linksys by Cisco EZXS88W ver. 3.4, 9 port switch.
Lot of 2 Cisco Catalyst WS-C3550-48-SMI 48-Port Ethernet Switches #OC
Cisco VIC3-2FXS/DID 2-Port FXS/DID Voice Card
Cisco HWIC-4A/S 4-Port Async/Sync Serial HWIC
Cisco Genuine OEM WS-G5484 30-0759-02 1000BASE-SX GBIC Module #2
Cisco Genuine OEM WS-G5484 30-0759-02 1000BASE-SX GBIC Module
Cisco Genuine OEM WS-G5484 30-0759-02 1000BASE-SX GBIC Module IBM P/N 21H9876
CISCO UCS B200 M3 BLADE 2x EIGHT CORE E5-2670 2.6GHz 192GB RAM 2x 1TB SATA
Cisco UBR7246VXR CMTS with Provisioning Software, Dell Server & Micritik Router
Cisco Catalyst 6500 Chassis Model WS-C6509 Chassis + 2 Power Supply & Fan Module
CISCO UCS B200 M3 BLADE CTO W/ 2x HEATSINK NO CPU NO RAM NO HDD
Cisco Switch Fabric Module Model Number WS-C6500-SFM Rack Mount Server Equipment
Cisco WS-X6K-SUP2-2GE Supervisor 2 Rack Mount Engine Module w/ GBIC Modules
Cisco Catalyst 6500 WS-X6516A-GBIC 16 Port 10/100/1000 Gigabit Ethernet Switch 2
Cisco 16 Port 10/100/1000 Catalyst 6500 Gigabit Ethernet Switch WS-X6516-GBIC
Cisco Firewall Services Module Model WS-SVC-FWM-1 Catalyst 6500 & 7600 Series
Cisco WS-X6K-SUP2-2GE Supervisor 2 Rack Engine Module with RAM Expansion Board
Cisco Catalyst 6500 48 Port 10/100/1000 Gigabit Ethernet Switch WS-6148-GE-TX
Cisco Catalyst 6500 Gigabit Ethernet Switch 16 Port 10/100/1000 WS-X6516A-GBIC 1
15454-EIA-BNC-B48 Cisco 15454 Cerent 48 BNC, B Side, I-Temp
15454-EIA-BNC-A48 Cisco 15454 Cerent 48 BNC, A Side, I-Temp
Cisco ME-FANTRAY ME3600X 3800X Fan Tray 800-32757-01 - OEM
Cisco N3K-C3064PQ-10GE Nexus 3064-E Switch 48 SFP+ 4 QSFP+ w/FAN But NO POWER
Lot of 2 Cisco Catalyst 3500 WS-C3560-24PS-S PoE 24 Ports Ethernet Switch #OC
CISCO WS-C3560V2-48PS - SWITCH - 48 PORTS - RACK - MOUNTABLE (NEW OPEN BOX)
New OEM CISCO UCS-MKIT-041RX-C for UCS-MR-2X041RX-C
New Cisco SG220-26 26-Port Gigabit Smart Plus Switch SG220-26-K9-NA
CISCO 7600-ES20-10G3C - 7600 ES20 Line Card, 2 x 10GE XFP with DFC 3C, 2 x 10GbE
Cisco LINKSYS SRW208 8-port 10 100 Ethernet Switch WebView SEALED Old Stock
CISCO CSS11503-AC Content Services Switch CSS5-SSL-K9 and CSS5-SCM-2GE
CISCO CATALYST 4000/4500 WS X4515 SUPERVISOR ENGINE IV Nice Clean Unit
2 pcs. Cisco SPA112 and 1 pc. Cisco SPA122 Fax over IP Adaptors
Cisco ASA5510 V06 Series Adaptive Security Plus Appliance ASA-5510
CISCO CSS11503-AC 11503 CONTENT SERVICES SWITCH W/ CSS5-SCM-2GE, CSS5-IOM-2GE
Cisco ASA5520 V04 ASA5520 Security Appliance
Lot of 2 Cisco Catalyst WS-C2970G-24T-E 24 Ports Managed Network Switch
Cisco IP Phone 7900 Series Lot of 4
BRAND NEW SEALED CISCO GLC-EX-SMD 1000BASE-EX SFP TRANSCEIVER MODULE
Cisco WS-X4748-UPOE+E Catalyst 4500E Series 48 Port UPOE 10/100/1000 (RJ-45) zk
Cisco CP-SINGLEFOOTSTAND 796X / 797X Series Unified IP Phone Expansion Module zk
Cisco AIR-AP-T-RAIL-R AIRONET Ceiling Grid Clip Recessed Mount for APS
Cisco CP-7905 CISCO Original 7905 IP Phone 10MB ETH zk
Cisco AIR-AP-BRACKET-2 Aironet 1040 / 1140 / 1260 / 3500 Bracket zk $16.99
CISCO UCS-FI-6296UP UCS 96 Port Fabric Interconnect Switch w/ Rails,Pwr Cable z5
Cisco GLC-LH-SM 1000BASE-LX/LH SFP GBIC Transceiver zk
NEW SEALED Cisco WS-C2960-48TC-S Catalyst Switch
Cisco Catalyst 2970 WS-C2970G-24TS-E 24-Port Gigabit Ethernet Managed Switch #OC
Cisco WS-X6148A-45AF Cisco Catalyst 6500 Series 48-Port PoE Switch Module
CISCO ATT DLC-100 RESIDENTIAL FIRE BURGLAR CONTROL UNIT FREE SHIP
CISCO 881GW-GN-A-K9 - ETHERNET SECURITY ROUTER W/ PCEX-3G-HSPA-G
Cisco AIR-ANT5959 Omnidirectional 2.4 GHz 2 dBi RP-TNC Antenna
cisco WS-C3750X-48PF-E we will buy your excess cisco 8328758800
CISCO SFP-10G-ER New sealed
CISCO GLC-ZX-SMD New sealed
cisco ASA5525-K9 ASA 5525-X we will buy your excess cisco 8328758800
Cisco C3945E-VSEC/K9 ~100% Tested ~1 Year Warranty ~Free Shipping ~Many Pics!
Cisco Catalyst 2950 WS-C2950C-24 24 Port 100 Base FX
Cisco PVDM-12 12-Channel DSP 73-3691-02
Cisco Catalyst 2950 Series Switches WS-C2950T-24 Managed 10/100
Cisco GLC-T 1000BASE-T SFP Transceiver Module for Cat5 Wire RJ-45 30-1410-02
Genuine Linksys Cisco AD 12/1C MT12-4120100-A1 ITE Power Supply Adapter
Cisco Systems Linksys Model EZXS88W 10/100 8-Port Workgroup Switch w/ AC adapter
Cisco WS-C3750G-48TS-S Catalyst 3750 Multilayer Switch 48GE 4 SFP Gigabit IPB
Cisco ws-c3560-24ps-s 24 Port POE Switch Lot Of 3
We buy Cisco (WS-X6816-10G-2T) (Brand New in Box) 10 Gig
CISCO - HW SWITCHES DT IEM-3000-4PC= IE 3000 EXPANSION MODULE 4 POE
Cisco ASA5540-BUN-K9 ASA 5540 Security Appliance 4GE 1FE 3DES / AES 5000 IPsec
we buy Cisco ** WS-C3850-48P-S** (Brand New in Box) 3850 Series POE (MO)