Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!sun-barr!cs.utexas.edu!uunet!portal!cup.portal.com!mmm
From: mmm@cup.portal.com (Mark Robert Thorson)
Newsgroups: sci.electronics
Subject: Yet another request for Opto-Iso. recommend
Message-ID: <20380@cup.portal.com>
Date: 13 Jul 89 03:41:12 GMT
Organization: The Portal System (TM)
Lines: 7

I want to receive an RS422 signal from a 26LS30 with 40-60 ohms of series
resistance.  I think isolation between the host and the peripheral would
be a good idea.  Can anyone recommend a good cheap opto-isolator for use
with RS422 from a Macintosh?  What should put across the RS422 signal,
other than the opto-isolator leads?  (e.g. back-to-back Zener diodes or
a MOV for overvoltage protection?  This thing will be for >25 feet, and
must be cheap.)