Specifications

Chapter 6 - RS-485 Devices RS-422 And RS-485 Applications Ebook
Page 79 of 137 Manual Documentation Number: <DocNumber>
www.bb-elec.com/
www.bb-europe.com/
Optically Isolated RS-422/485 Devices
Optical isolation protects electronic devices from transient surges and
differences in ground potentials. Industrial applications are particularly
susceptible to data corruption or destruction of electronic devices
because of electric motors starting, lightning strikes and other events.
Isolators can provide 2000 volts of isolation between input and output.
Figure 60: An Optically Isolated Device
Examples of devices and features of optically isolated devices include:
RS-232 to RS-485 conversion
RS-422 four-wire to RS-485 two-wire conversion
Repeaters