[SI-LIST] Re: How to connect Chassis ground to DGND

steve weir wrote:

> if we have a big
installation, and we use non-isolated connections, like RS-485 shields
between rooms, we can be right back to getting really big currents flowing
in the shields.

Years ago I worked at a plant that had such bad shield current problems
between adjacent equipment rooms that ther installations were tied with huge
(I mean, 2 inch diameter) jumper cables.  Still, the cables were always warm
to the touch!!!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Euredjian
eCinema Systems, Inc.
voice: 661-305-9320
fax: 661-775-4876
martin@xxxxxxxxxxxxxx
ecinema@xxxxxxxx
www.ecinemasys.com




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