Introduction; Examples Of Topologies; Cascading; Point-To-Point Connection - Siemens 6ES7 972-4AA02-0XA0 User Manual

User´s Guide Power Rail Booster

4.2 Introduction

The following network topologies can be implemented using the Power Rail Booster:
Cascading of Power Rail sections,
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Point-to-point connections
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Line topology
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Star topology (contact rail system)
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Closed loop
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Combinations of the above are also possible. Two contact rails or cable strands are
used to set up the Power-Rail sections for these network topologies. All cabling or
wiring for the contact rails must be done with PROFIBUS cable.

4.3 Examples of Topologies

4.3.1

Cascading

The PRB regenerates the signal waveshape of the data received, making it possible
to cascade as many as 10 PRBs. You must consider the increased signal throughput
time (6 T-bits per PRB) when configuring in STEP 7, see Chapter 5.3.1!
Fig. 4: Example of cascading
4.3.2

Point-to-point Connection

This configuration is distinguished by the fact that only one PRB is installed on each
side of the Power Rail section. To optimize interference immunity, users must set the
"IS-Master" signal on both PRBs. To do this, you must set on both PRBs DIP
switches DIP-7 and DIP-8 to "ON".
Fig. 5: Example of a point-to-point connection
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6ES7 972-4AA02-0XA0
Version 12/2005
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