Wanted to share yet another option to power 24V nodes from "standard" 802.3af/802.3at 48V ports found on bigger network switches. These boxes from Tycon take 48V PoE in and output either 24V or 18V, jumper selectable, passive output for Ubiquiti nodes. I put two in today to add remote control power from a Cisco switch. Left them at 24V since these nodes are at 125 and 175ft. 18V for shorter runs to save on wear and tear of regulator/diodes. They are 10/100 only.
http://tyconsystems.com/index.php/dc-passive/493-tp-poe-1824
26 bucks at Flytec.
Ian
What is nice about using an adapter of this sort is the ability to use a standard PoE network switch and just plug in your AREDN node to safely power it up. I just installed a Netgear GS724TPv2 switch and use it to power a growing collection of nodes used most for testing and tunnels.