Technical data

Topologies of SIMATIC NET PROFIBUS networks
2.4 Topologies with PROFIBUS PA
PROFIBUS Network Manual
System Manual, Edition 04/2009, C79000-G8976-C124-03
37
2.4 Topologies with PROFIBUS PA
Bus and star topology
The topology of PROFIBUS PA may be in linear or stellar form.
SpliTConnect system
The SpliTConnect tap (T tap) allows a bus segment to be set up with end device connection
points. The SpliTConnect tap can also be cascaded with the SpliTConnect coupler to form
connection distributors. Using the SpliTConnect terminator, the tap can be expanded to form
the segment terminator.
Bus terminator
Star
T tap
DP/PA-Koppler
DC 24 V
PROFIBUS PA
PROFIBUS DP
Figure 2-9 Bus and star topology
Field distributors AFD/AFS
For more information on expanding the PA line, refer to section "Field distributors AFD/AFS
(Page
97)"
Field device supply via PROFIBUS PA
When using the DP/PA bus coupler, the power for the field devices is supplied via the data
line of PROFIBUS PA.