Ok, compatibility isn’t the right word.
Couple of questions:
My arduino (ether10) has POE. But that is a power INPUT - right?
There is an arduino POE “HUB” thing Jaycar sells where there are 4 CAT-5 ports which all have POE.
I therefore read that as:
If you have 4 Arduino cards with Cat-5 ports, you can power them all from this and also have them networked.
That way you save needing 4 power supplies, just one “central” one which feeds all 4 boards.
So it begs the question:
Say I have less than 4 cards, and want them on their own little network, BUT want them to be connecte to my “larger” network which isn’t always on.
I have a big hub/switch/thing with a spare hole for this other “Arduino bunch of cards” to connect.
Will there be a problem if this device also has POE and I plug a cable from it to the Arduino POE card?
It is still "work in progress but may be happening in the future. Thought it better to ask now so I can understand any problems before they really happen.