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From: tac@sei.cmu.edu (Timothy Coddington)
Newsgroups: sci.electronics
Subject: Please compare RS232,RS232C,RS485,RS422
Keywords: Serial interface standards
Message-ID: <6436@aw.sei.cmu.edu>
Date: 29 Jul 88 05:11:25 GMT
Sender: netnews@sei.cmu.edu
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	Would someone please take the time to compare the basic
	differences between the standards: RS-232, RS-232C, RS-485, and
	RS-422.  I would suspect they differ in max data rates, type of
	transmission, signals, and protocol.

	RS-232, and RS-232C probably don't differ that much with respect to
	the attributes I'm listed, but what is the difference ?

	Also, if you are aware of what dictates using one over another,
	please mention that too.  Are there others like this I've missed
	that fit in this class of interface, and is a standard?

	Thanks for taking the time.

	Tim Coddington     arpanet: tac@sei.cmu.edu
			   Software Engineering Institute, CMU
			   412-268-7712

ps  If I get what I think is a comprehensive list I'll post to the net.