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From: sean@oddjob.UChicago.UUCP (Sean Casey)
Newsgroups: net.periphs
Subject: How long can an RS232 line be?
Message-ID: <487@oddjob.UChicago.UUCP>
Date: Thu, 11-Oct-84 19:21:12 EDT
Article-I.D.: oddjob.487
Posted: Thu Oct 11 19:21:12 1984
Date-Received: Sat, 13-Oct-84 06:20:29 EDT
Organization: U. Chicago: Astronomy & Astrophysics
Lines: 20

<>

Dear Netland,
I'm planning to run a few rs232 lines around my office and I would like
to know the net's opinion as to

	o	the maximum length a line can be before inductive
		voltages become a problem. Is shielding really
		necessary? (Lines lengths are about 200ft or so)

	o	what length and under what conditions are optical
		isolators (or their equvalent) between the system
		and the terminals required (advisable) for rs232 lines.

Please reply by mail and thanks in advance.

Sean Casey	...ihnp4!oddjob!sean

University of Chicago
Department of Astronomy and Astrophysics