Technical data

Bus connectors and preassembled cables
6.8 Cable connections
PROFIBUS Network Manual
System Manual, Edition 04/2009, C79000-G8976-C124-03
183
6.8 Cable connections
6.8.1 Mixing cable types
Using different cable types
Note
If different cable types are used in a PROFIBUS segment, remember that the segment
length is reduced accordingly.
6.8.2 Connecting cables together using network components
Sometimes, a connection between two different bus cable sections is necessary, for
example, to change from the standard bus cable to a section with festoon cable.
The easiest way to implement this cable change is to use the two bus cable terminals of a
bus connector, bus terminal or repeater. The connection of the cables is described in detail
in Section "
Cables for PROFIBUS RS485 networks (Page 113)". For information about
laying cables and mechanical protection of the cables refer to Appendix "
Installing bus
cables (Page
259)".
To change from an underground cable to the standard bus cable, it is advisable to protect
against overvoltage (see Appendix B "
Lightning and overvoltage protection of bus cables
between buildings (Page
253)".