Cen I use an mAp-2n with double power?
I mean: itself power adatper and same time PoE. I would like to make redundant powered device
all our devices can accept two power sources, it will work from one, and when it fails, use the other. The only thing to note, that the voltages must be different. If they are the same, it could fluctuate between these power sources and burn something.
So if your Jack is 24V, use PoE with 18V and so on.