
ii Table of Contents RS-422/485 Application Note
Copyright B&B Electronics -- Revised October 1997
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 434-7094
CHAPTER 5: SOFTWARE...........................................................................33
INTRODUCTION ...............................................................................................33
RS-422 SYSTEMS............................................................................................ 33
RS-485 DRIVER CONTROL..............................................................................33
RS-485 RECEIVER CONTROL .......................................................................... 34
MASTER-SLAVE SYSTEMS...............................................................................34
Four Wire Master-Slave Systems ...............................................................34
Two Wire Master-Slave Systems ................................................................ 34
MULTI-MASTER RS-485 SYSTEMS ................................................................. 35
SYSTEMS WITH PORT POWERED CONVERTERS................................................35
CHAPTER 6: SELECTING RS-485 DEVICES...........................................36
CHAPTER 7: SOURCES OF FURTHER INFORMATION......................37
APPENDIX A: EIA SPECIFICATION SUMMARY..................................38
APPENDIX B: EIA STANDARD RS-423 DATA TRANSMISSION.........40
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