Specifications

Chapter 2 - System Configuration RS-422 And RS-485 Applications Ebook
Page 23 of 137 Manual Documentation Number: <DocNumber>
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System Configuration
RS-422 and RS-485 systems can be configured in a variety of ways to
provide a wide range of communications solutions. This section
includes information on connections and topologies, two and four-wire
systems, termination and biasing issues and solutions, and the
application of repeaters.
2 In This Chapter
RS-422 Point-to-Point Connections ............................................................... 24
Network Topologies .................................................................................... 25
Two-Wire Systems ...................................................................................... 25
Four-Wire Systems ...................................................................................... 27
Termination ................................................................................................ 27
Biasing an RS-485 Network .......................................................................... 32
Other Biasing and Terminating Considerations .............................................. 38
Using Repeaters .......................................................................................... 39
Using Fractional Load Receivers to Extend Distance and Number of Nodes ..... 42
CHAPTER 2