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以太网供电POE
无锡普罗图斯机电科技有限公司 / 2010-11-28
无锡普罗图斯机电科技有限公司 / 2010-11-28
以太网供电（PoE，Power over Ethernet）
是一个有线以太网局域网技术（LAN），它能使每个设备运作所必需的电流由数据电缆而不是电源线来运载。
为了让以太网供电工作，电流必须进入电源供应端的数据电缆，并在设备终端输出。这样就可以保持电流与数据信号分离，不会干扰其他设备。目前是通过一种称为injector的组件来进入电缆的。如果在电缆另一端的设备与PoE兼容，那么该设备将能正常运行而且无需修改。如果设备与PoE不兼容，就必须安装一种称为picker 或 tap的组件，将电流从电缆移出。然后，这种“picked-off”电流被路由到电源插孔。
下面这个是最简单的应用实例：
下一篇:监控录像的方法介绍
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