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From: "mook johnson"
Subject: Re: RS232 Line Driver?
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Sat, 02 Nov 2002 13:11:35 GMT
NNTP-Posting-Date: Sat, 02 Nov 2002 07:11:35 CST
Organization: Road Runner - Texas
You had better be sure the ground is ground. If you are running this from
building to building a lightning strike can cause a significant voltage
between the two earth ground locations. This has been responsible for
blowing out RS-232 connections in the past. It happened intermittently but
often enough to force me to change to opto isolated RS-422/485. No problems
"Kevin Patterson" wrote in message
> Can anyone tell me what is the phyical maximum distance that a RS232
> signal can go along a cable? I want to attach a RS232 Barcode Reader
> at some distance to my computer (20/30m). If needed, how could I make
> a Line Driver to achieve this distance?.
> I have a medium understanding of electronics, and would really
> appreciate any help given.
> Thanks, Kev
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