Serial Interfacing

I have been very happy with the products from B&B Electronics:

If you are using RS-422 or RS-485, the first thing you will want to do is read their excellent RS-422/485 Application Note:

I have used their 3PXCC2B cards with great success.  This is a dual serial port ISA card.  Each port can be setup as RS-232, or RS-422, or RS-485.

One thing I love about B&B is that they provide full manuals and schematics on-line, so you can examine the details before you buy.

I have used several of their RS-485 converters.  Check out the available versions at:

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Edited 4/7/2013

Entire Site Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, & 2013 by Ray A. Rayburn. All rights reserved.

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Ray A. Rayburn
1716 Main St Ste A #300
Longmont, CO 80501-7413