Specifications

Chapter 4 - Transient Protection of RS-422 and RS-485 Systems RS-422 And RS-485 Applications Ebook
Page 57 of 137 Manual Documentation Number: <DocNumber>
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conductors of a data cable such as those caused by short circuits
between data and power circuits.
Isolation Devices
Optical isolation can be implemented in a number of ways. If a
conversion from RS-232 to RS-422 or RS-485 is being made, optically
isolated converters are available. Optically isolated ISA bus serial cards
can replace existing ports in PC systems. For systems with existing RS-
422 or RS-485 ports, an optically isolated repeater can be installed.
Figure 42: B&B 485OP Optically Isolated RS-485 Repeater
Additional examples of optically isolated devices can be found in the
B&B Electronics Data Communications catalog.