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RS-422 and RS-485 Application Note
B&B Electronics Mfg. Co. Inc.
P.O. Box 1040 -- Ottawa, IL 61350...
www.DataSheet4U.com
RS-422 and RS-485 Application Note
B&B Electronics Mfg. Co. Inc.
P.O. Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094
Internet Addresses: B&B Home Page: http://www.bb-elec.com Customer Service:
[email protected] Technical Support:
[email protected]
© B&B Electronics - Revised October 1997
RS-422/485 Application Note
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094
Cover Page
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Table of Contents
CHAPTER 1: OVERVIEW ........................................................................... 1 INTRODUCTION ............................................................................................. 1 DATA TRANSMISSION SIGNALS ...................................................................... 1 Unbalanced Line Drivers ......................................................................... 1 Balanced Line Drivers ............................................................................. 1 Balanced Line Receivers.......................................................................... 3 EIA STANDARD RS-422 DATA TRANSMISSION .............................................. 3 EIA STANDARD RS-485 DATA TRANSMISSION .............................................. 6 TRISTATE CONTROL OF AN RS-485 DEVICE USING RTS.................................. 9 SEND DATA CONTROL OF AN RS-485 DEVICE .............................................. 11 CHAPTER 2: SYSTEM CONFIGURATION ........