Re: [uCsimm] HV capacitors on the LAN transformer

From: Slepov Dmitry (dmitryslepov@yahoo.com)
Date: Wed Aug 15 2001 - 03:43:15 EDT


Yes, but the ucsimm doesn't have those caps.
So, does this make it somehow less reliable in a
normal environment?

Dmitry

 
--- Daniel Haensse <daniel.haensse@fhk.usz.ch> wrote:
> Am Mit, 15 Aug 2001 schrieben Sie:
> > Folks, who can answer this...
> >
> > There is a LAN transformer on the ucsimm (VALOR-
> PULSE
> > ENGINEERING part PT4153S). On most Ethernet
> designs,
> > there are 2 1kV 0.01 capacitors connected to this
> > transformer on the ethernet side. On the ucsimm
> these
> > transformer pins are left unconnected. Question:
> what
> > these capacitors normally for, why they are
> missing
> > and is there any penalty for not having them?
> Those capacitors will discharge to gnd if the
> voltage is above 1kV.
> So if the LAN transformer can't stand the voltage
> anymore, on the uCSimm
> it will discharge to the uCSimm and may blow the
> ethernet controller or
> anything else that the high voltage enjoys to
> destroy.
>
> Dani
>
>
> >
> > I will really appreciate somebody answering this
> > question...
> >
> > Regards,
> > Dmitry Slepov
> >
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>
**********************************************************
>
>
> Daniel Haensse
> Dipl. Ing. ETH
> Klinik fuer Neonatologie
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