Specifications

Chapter 6 - RS-485 Devices RS-422 And RS-485 Applications Ebook
Page 76 of 137 Manual Documentation Number: <DocNumber>
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USB to RS-422/485 Converters
Universal Serial Bus (USB) is a serial protocol and physical layer link.
Data is transmitted differentially on one pair of wires, providing
relatively good noise immunity. Another pair carries DC power to
downstream devices, allowing many low power devices to be bus
powered. USB supports a high data rate and "hot swap" connection for
PCs, providing an easy connection to a wide variety of multimedia and
network USB devices. Most PCs today do not come equipped with RS-
232 ports. USB has become the standard serial interface on PCs (and
increasingly on other equipment).
Figure 57: A USB to RS-422/485 Converter
Examples of USB to RS-422/485 devices include the following:
In-line USB to RS-232, RS-422 and RS-485 converters
Isolated converters
Panel mount converters
DIN rail mountable converters
Multiple port converters