Jeff Ramin wrote: > > Joel Jaeggli wrote: >> Jeff Ramin wrote: >>> Can somebody explain what "passive" POE means? I'm looking at >>> the ALIX products, and they state they implement passive POE. >> >> presumably that means midspan instead of 802.3af which would be >> negotiated. It would also tend to imply that you shouldn't apply power >> to the data pins. > > I see. In other words, you can provide power to the board this way > with a passive injector, but an 802.3af switch would not provide > power. > > Is that correct?
Yeah, it also specifies that the voltage range is 7-20v for the switch mode power-supply. I have some former colleagues who do something similar to power a bunch of devices off a battery stack connected to a solar array but commoditized and not hacked together 802.af has it's benifits in terms of being able to get to components and not having to engineer something that will hose you, soekris 4826 is an exmple of something that's a little closer to ideal. 802.3af+ or whatever they end up calling it will help a lot with the current af power limitiations. _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
