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PROFIBUS Power Hub Segment Coupler 3 (SK3)
Basic Redundancy Concepts
System Redundancy
In the system redundancy concept 2 masters exist, each one of which performs its own
PROFIBUS cycle on 2 different lines. The redundant slave instances are connected to each
other with the corresponding connection lines:
Figure 8.3
This concept has the disadvantage that using non-redundant slaves necessarily require
Y–links. System redundancy is found with Siemens S7.
The Pepperl+Fuchs HD2-GTR-4PA gateway does not support system redundancy.
System redundancy
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