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Hi all, Something is wrong in this analysis. The situation described here regarding current
ground loops can't happen if you are 802.3 compliant. The DC source of the PSE can not be
grounded to the chassis. 802.3 requires isolation between MDI leads
and chassis ground. PoE circuitry is Isolated from the PHY
circuitry! We already discussed this issues in the
802.3af and I hope nothing has changed since then. See attached presentation from the 802.3af
days in particular slides 10 and 11. Yair From:
owner-stds-802-3-poep@xxxxxxxx [mailto:owner-stds-802-3-poep@xxxxxxxx] On Behalf Of Dove, Dan Steve, I modified your drawing to address DC
isolation requirements of 802.3af.
------------ Previous Message Below ------------ From:
owner-stds-802-3-poep@xxxxxxxx [mailto:owner-stds-802-3-poep@xxxxxxxx] On Behalf Of Sorry, this time the figure is attached. From: Guys, I think we have a problem. See attached diagram. Steve |