[Soekris] Max distance for PoE

Chuck Yerkes chuck+soekris at 2003.snew.com
Mon Dec 1 17:19:47 UTC 2003


Quoting Christian van den Bosch (cbosch at 4c.ucc.ie):
> On Sat, 29 Nov 2003, Chuck Yerkes wrote:
>
> > At 15VDC, your Soekris won't come up.
>
> I beg to differ. I have several running on a 15V supply on around 30
> metres of cable :) Rumour has it they'll run on anything down to 11V.

I said:
| Voltage drops over distance using wires.  My Pocket Ref isn't handy
| and I never remember the numbers, but at 200M, you lose maybe 4 or
| 6 volts?  (don't hold me to those numbers). At 48VDC, that leaves you
| with 42 volts.  Not a problem.  At 15VDC, your Soekris won't come up.

And I wasn't totally clear.  At 48VDC with a 6V drop, you're ok.
At 15VDC [before your 6V drop], you're not ok.  You have 9VDC which
ain't enough.



More information about the Soekris-tech mailing list