> possible), you can use the 2 pairs for just the positive voltage and the > shield as the ground. O, and don't forget to use a nice filter
Be careful of ground loops. If you have two grounds tied to earth at two different places, the actual potentials at each spot can be different, resulting in a small current flow across your ground conductor... and a resulting voltage drop at one end across your ground connector. This can driver you nuts trying to find problems in your signaling. Ethernet uses differential pairs which *should* be immune to this, but there may be logic circuits inside the device that are affected. The current flow can result in galvanic corrosion too, resulting in ground connections that get eaten through. :( Be careful, think it through. You may want to "float" the far end powered device and ground it only through the ground conductor you've definded in the CAT5 cable. If you do that, remember that a long wire run has appreciable resistance and factor that into your fuse plan... you may want to go with a smaller fuse, since a short inside your remore unit may result in less current than you would get if there was not a whole long run of wire involved. Don't skip fusing it though! Greg -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
