以太网供电技术与实现  

Realization of Power over Ethernet Technology

作　　者：白占元[1] 徐皑冬[1] 谭彩虹[1] 张昕凯[1] 

机构地区：[1]中科院沈阳自动化所自动控制系统研究室,沈阳市110016

出　　处：《仪器仪表标准化与计量》2004年第3期27-30,共4页Instrument Standardization & Metrology

摘　　要：本文对IEEE802.3af-2003标准作了简单的介绍,该标准定义了以太网供电技术,众多低功耗以太网设备将从该技术中获益。该标准介绍了两种供电方式,即端跨式供电方式和中跨式供电方式。文中对现有的几种以太网供电方案和芯片特性做了介绍和分析,这对于针对特定的以太网供电系统的方案选择是非常有用的,另外还结合基金会现场总线HSE仪表供电方面的应用,重点介绍了其中的一种实现方式。This paper introduces a newly approved specification called IEEE802.3af-2003 which defines the PoE(Power over Ethernet) method, and a lot of low-power Ethernet equipments will benefit from it. It introduces twoways to power, endspan and midspan. Some PoE design and chip feature are also described and analyzed in thispaper which makes it helpful to choose the blueprint for a special PoE system. Besides, it emphasizes the realizationof this technique for FF HSE instrument.

关 键 词：以太网 IEEE802.3af-2003 端跨式供电 中跨式供电 现场总线 HSE仪表 

分 类 号：TM76[电气工程—电力系统及自动化]