Power-over-Ethernet Regulator 802.3af

[Nivin37]

Hi,

What is the minimum voltage the Power-over-Ethernet Regulator 802.3af will work with reliably.

I have a EtherTen going into a 24VDC Sola remote Radio installation, however it may end up as having 802.af 48VDC injected in the future.

SO I guess my real question is will the Power-over-Ethernet Regulator 802.3af work reliably at 24VDC & if so what is the lower limit for reliable supply.

Steve...

[LukeW]

The 802.3af controller/enumerator chip in the Freetronics 802.3af module is likely to behave very strangely or not work at all if you feed it a voltage which is inconsistent with a standard 802.3af network. It will probably think that there's something wrong with the network because the voltage is too low.

If you're using "hacker style" PoE and not standard 802.3af power injection, you should use something like the Freetronics PR28V, which is just a "dumb" voltage regulator which does not expect standard 802.3af voltage levels and communication.

Because it uses a buck converter chip, it will be fine with high input voltages up to 28V, but it won't care exactly what that voltage is, as long as it's within 9-28V.

[hometownfl]

A company called www.panoptictechnology.com has many different elegant solutions for POE issues. They have POE adapters that will scale down to any voltage you may need.