DaveM 0 Posted February 3, 2009 This question has been answered a couple of time in the forum already. The answer is to use diodes. It is not quite as straight forward as it might seem if you have never dealt with RS-422/485 before so I have put it into a schematic. Hope it helps someone out. I used 1A rectifier diodes you can get at Radio Shack and they are working great at 2400 baud. You might need to go to signal diodes like the 1N914 if you run at higher speeds. I don't see any reason this couldn't be expanded to 3 or more devices as well. Share this post Link to post Share on other sites
Soundy 1 Posted February 3, 2009 I was looking at devices to do this and all the ones I found ran in the $75+ range... one actually showed a schematic, and I couldn't believe how ridiculously simple the design was, nevermind how they could get away with charging $75 for $5 worth of parts. Share this post Link to post Share on other sites
