We are using passive PoE injectors and long ethernet cables. [[Image(power-ranges.png, 400px,right)]] Below a reference table for the voltages ranges of the hardware we use: ||= '''Item''' =||= '''Low''' =||= '''High''' =||= '''Max Consumption''' =|| || alix2d13 || 7V || 20V || 5.0W || || NS5, M5, M2 || 9V || 24V || 8.0W || || MS M2-Loco || 9V || 24V || 5.5W || || Bullet5M || 10V || 24V || 6.0W || || airCam || 9V || 24V || 2.4W || || apu1d4 || 12V || 12V || 12.0W || You want the Voltage to be as high as possible, causing your current to be as low. This in general makes transport over UTP wires more effient (higher voltage = less loss) and causes your adapters to work more effient (AC->DC adapters tend to be more effient and last longer if you keep the voltage as high as possible). We aim to get between 18V-20V to our node, Make sure to keep track of your input voltage [http://blog.fosketts.net/toolbox/power-ethernet-calculator/ Calculate] when using long cables.