Specifications

Chapter 2 - System Configuration RS-422 And RS-485 Applications Ebook
Page 41 of 137 Manual Documentation Number: <DocNumber>
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Using Repeaters in Star, Ring and Tree Networks
Repeaters can be used to segment and extend RS-485 networks. As
shown in the following diagram, a star configuration can be created by
connecting the master node (computer) to several isolated repeaters at
a central location. The repeaters connect to nodes on each leg of the
star. Each leg can be up to 4000 feet long.
Figure 29: A Star Network using RS-485 Repeaters
Ring networks can be implemented, but they require a special type of
repeating device or the data will be repeated around the ring
continuously.
Tree and star networks are not recommended unless repeaters are
used to segment the sections of the network appropriately.