Hello Chris
In an ideal world. The Ethernet cables would all be enclosed in metal conduit
or cable trays.
Routed only with similar communications and signal level circuits. The
Cabinets would all have
provisions to either ground or capacitively couple any cable shields. And the
final connections
In message ,
dated Wed, 24 Nov 2010, "ce-test, qualified testing bv - Gert Gremmen"
writes:
>Magnetic fields from cabling carrying larges currents will couple
>through the shield.
Well, not if it's grounded at all frequencies at both ends, but then you
get all the circulating currents proble
In message <4ced7e8b.9020...@emcesd.com>, dated Wed, 24 Nov 2010, Doug
Smith writes:
>Sometimes the shield can cause high frequency problems as it is just a
>thick wire. I documented this in a paper published at the EMC'94 Roma
>Symposium. One problem can happen when CM shield currents land on
Hi John and the group,
Sometimes the shield can cause high frequency problems as it is just a thick
wire. I documented this in a paper published at the EMC'94 Roma Symposium. One
problem can happen when CM shield currents land on a PC chassis and then get
into the internal circuits through seams i
I would not use STP for industrial applications as you point out.
STP has no added value to Ethernet signals. The CAT 5 (and 6) have such
good symmetry that the shielding is of no value anymore.
Note that the shield part principally operates for electrical fields
only, such
as high voltage power li
In message <8F3FCCF474B9484DAE45A95D68B5379E@christopher>, dated Wed, 24
Nov 2010, Chris Wells writes:
>We also use multipoint RS485 serial communication links in our power
>gear that can go thousands of feet between separate gear line ups. In
>this application we reference shield at each tap
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