🚀 go-pugleaf

In article <C1Ewyx.2ny@dcs.ed.ac.uk> gst@dcs.ed.ac.uk (George Taylor) writes:
>The engineer at Norwhich Computer Services ...
>suggests extreme care be taken with the port and that screened (hence earthing
>from one machine's chasis to another) leads and plugs should always be used.

Screened leads, yes, but the screen should be connected at one end only and
not used to provide an earth connection to either machine. This is because
(a) it can cause an earth loop if both machines are earthed and (b) the
chassis of the two machines may not be at the same potential particularly if
they are remote. This is why there is a separate signal ground connection
which is effectively a common return path for the other signals.

Richard