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6GK5324-0GG10-1AR2参详
6GK5324-0GG10-1AR2参详
6GK5324-0GG10-1AR2参详
CLDC3600FK12P05
6SE7032-7EB87-2DA1-Z-M08
SH100/40080/0/0/00/00/00/11/00
SH100/40060/0/0/00/00/00/11/00
6SL3120-1TE32-0AA3
MDS60A0110-5A3-4-00
C98043-A1200-L22-3
6AV6641-0CA01-0AX1
LXM62DD15D21000
LXM62DU60D21000
6GK7 443-5DX05-0XE1
6ES7505-0KA00-0AB0
6ES7512-1CK01-0AB0
6ES7522-1BH00-0AB0
6ES7531-7KF00-0AB0
6ES7531-7QF00-0AB0
6ES7972-0AA02-0XA0
6GK7343-1EX21-0XE0
6GK7343-1EX30-0XE0
6GK7443-1EX11-0XE0 数量各1
6ES7331-7KB00-0AB0
6ES7331-7RD00-0AB0
6ES7332-5HB00-0AB0
6ES7332-5HB01-0AB0
6ES7334-0CE01-0AA0
6ES7340-1AH02-0AE0
6ES7340-1CH00-0AE0
6ES7354-1AH01-0AE0
6ES7361-3CA00-0AA0
6ES7407-0KA01-0AA0
6ED1052-1FB00-0BA6 1
6ED1052-2MD08-0BA0 1
6SL3120-1TE32-0AA3 2
6ES7412-2XK07-0AB0 1PCS
25B-A2P5N114 1PCS 面价3142
6AV7241-5DC02-0JA0 1PCS
6ED1052-1HB00-0BA5 1
6ED1052-1HB00-0BA6 1
YASKAWA ELECTRIC USAMED-30MA2T USAMED30MA2T
YASKAWA ELECTRIC E7BVB021 E7BVB021
YASKAWA ELECTRIC CIMR-P5U20450F CIMRP5U20450F
YASKAWA ELECTRIC CIMR-H3-0G2E-10 CIMRH30G2E10
YASKAWA ELECTRIC CACR-IR10101FC CACRIR10101FC
WILLIAMSON PRO-120-20-F-23 PRO12020F23
WESTINGHOUSE MD3B1NPFRG MD3B1NPFRG
WESTINGHOUSE 292B930A10 292B930A10
VIBRO METER CMC16 CMC16
TRICONEX 3006 3006
TOTAL CONTROL PRODUCTS QPI-CTA-E0000 QPICTAE0000
TEXAS INSTRUMENTS PLC 575-2104 5752104
TEXAS INSTRUMENTS PLC 565-2820 5652820
TELEMECANIQUE MPC-KT12NAX00N MPCKT12NAX00N
TB WOODS UVC-4050-0H UVC40500H
SYMAX 8030-ROM-121 8030ROM121
SSD DRIVES 955-8R0060 9558R0060
SQUARE D MEL36800LSG MEL36800LSG
SQUARE D ATV-58EU54N4 ATV58EU54N4
SQUARE D 1.5S1F 15S1F
SPECTRA TECH 912A036A 912A036A
SIEMENS HNFC366J HNFC366J
SIEMENS 6SE7-041-6ES87-0FA0 6SE70416ES870FA0
SIEMENS 6SE7-021-0EA61-Z-L20 6SE70210EA61ZL20
SIEMENS 6SC9-111-2GB15 6SC91112GB15
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SIEMENS 6ES5-247-1AA11 6ES52471AA11
SIEMENS 6DS1-143-8AA 6DS11438AA
SIEMENS 6DS1-105-8AA 6DS11058AA
SIEMENS 6DD1-606-1AC0 6DD16061AC0
SIEMENS 3WN6231-0FC74-1FA1 3WN62310FC741FA1
SIEMENS 3TF6944-0CM7 3TF69440CM7
SIEMENS 1LA0364-2SP22 1LA03642SP22
SEIKO INSTRUMENTS & ELECS LTD OFL-760A-26 OFL760A26
SAFTRONICS SAF402.0140 SAF4020140
REXROTH PE110 PE110
REXROTH 0-608-830-141 0608830141
RELIANCE ELECTRIC W/R-67100-B WR67100B
RELIANCE ELECTRIC VZ3000-DASR-1 VZ3000DASR1
RELIANCE ELECTRIC GV3000AC106 GV3000AC106
RELIANCE ELECTRIC GV3000-AC-043 GV3000AC043
RELIANCE ELECTRIC B/M-60031-1 BM600311
RELIANCE ELECTRIC 803456-3T 8034563T
RELIANCE ELECTRIC 61C-613 61C613
RELIANCE ELECTRIC 61C-160 61C160
RELIANCE ELECTRIC 57C-442 57C442
RELIANCE ELECTRIC 50P4161 50P4161
RELIANCE ELECTRIC 45C-15D 45C15D
RELIANCE ELECTRIC 0-60031-4B 0600314B
RELIANCE ELECTRIC 0-55325-37 05532537
RELIANCE ELECTRIC 0-48673-1 0486731
PROSOFT 3100-MCM 3100MCM
PHOENIX CONTACT IBS-IP-500-PS-2-BS IBSIP500PS2BS
PARKER 46987601L 46987601L
ORMEC MAC-B200F/K1A MACB200FK1A
OMRON V530-R160EP V530R160EP
NICOLET PROTEJE-460 PROTEJE460
NEMATRON CORP IWS-2513 IWS2513
NACHI ROP501 ROP501
NACHI ROP500 ROP500
MOORE PRODUCTS 39ACM28ADN 39ACM28ADN
MOORE PRODUCTS 352PEA21VNNNNAW 352PEA21VNNNNAW
MODICON PC-CBCA-000 PCCBCA000
MODICON AS-P890-300 ASP890300
MODICON AS-M507-016 ASM507016
MODICON AS-B807-132 ASB807132
MODICON AS-506P-F16 AS506PF16
MODICON AS-506P-005 AS506P005
MODICON AM-S980-800 AMS980800
MODICON AM-M909-023 AMM909023
MODICON AM-M909-002 AMM909002
MODICON 557VIC10200 557VIC10200
MODICON 140-CRP-931-00 140CRP93100
以太网交换机
以太网交换机
随着计算机及其互联技术(也即通常所谓的“网络技术”)的迅速发展,以太网成为了迄今为止普及率*高的短距离二层计算机网络。而以太网的核心部件就是以太网交换机。
不论是人工交换还是程控交换,都是为了传输语音信号,是需要独占线路的“电路交换”。而以太网是一种计算机网络,需要传输的是数据,因此采用的是“分组交换”。但无论采取哪种交换方式,交换机为两点间提供“独享通路”的特性不会改变。就以太网设备而言,交换机和集线器的本质区别就在于:当A发信息给B时,如果通过集线器,则接入集线器的所有网络节点都会收到这条信息(也就是以广播形式发送),只是网卡在硬件层面就会过滤掉不是发给本机的信息;而如果通过交换机,除非A通知交换机广播,否则发给B的信息C绝不会收到(获取交换机控制权限从而监听的情况除外)。
以太网交换机厂商根据市场需求,推出了三层甚至四层交换机。但无论如何,其核心功能仍是二层的以太网数据包交换,只是带有了*定的处理IP层甚至更高层数据包的能力。网络交换机是一个扩大网络的器材,能为子网络中提供更多的连接端口,以便连接更多的计算机。随着通信业的发展以及国民经济信息化的推进,网络交换机市场呈稳步上升态势。它具有性能价格比高、高度灵活、相对简单、易于实现等特点.