Specifications

Chapter 4 - Transient Protection of RS-422 and RS-485 Systems RS-422 And RS-485 Applications Ebook
Page 64 of 137 Manual Documentation Number: <DocNumber>
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Optical Isolation
Shunting
Requires no ground reference
Must have low impedence ground path
Adds no loading to data lines
Presents additional capacitive loading to data lines
Higher complexity
Lower complexity, uses passive components
Effective on common mode transients
Effective on both common and differential mode transients
Not dependent on installation quality
Can be improperly installed by user
Requires an external power source
No power required
Not affected by long term or continuous transients
Subject to damage by long duration transients