Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site fluke.UUCP
Path: utzoo!linus!decvax!microsoft!fluke!dag
From: dag@fluke.UUCP (David Gunderson)
Newsgroups: net.dcom
Subject: Re: Re: Wanted: info on EIA RS-232 - (nf)
Message-ID: <783@vax2.fluke.UUCP>
Date: Mon, 31-Oct-83 13:07:10 EST
Article-I.D.: vax2.783
Posted: Mon Oct 31 13:07:10 1983
Date-Received: Thu, 3-Nov-83 21:59:27 EST
References: <351@umn-cs.UUCP>
Organization: John Fluke Mfg. Co., Everett, Wash
Lines: 9

Be careful about floating ground systems. A fellow I know connected up an
RS-232 system like that in a building remote from the one the computer was in.
He used a direct wire connection. It turned out that the outlet his terminal
was plugged into had the ground and common reversed causing the signal lines
of the RS-232 line to be raised to about 110 volts. It caused MUCH damage in
the serial interface section of the PDP-11 that it was connected (smoke and
flame!!!).

--David Gunderson