Technical data

Installing bus cables
C.3 Mechanical protection of bus cables
PROFIBUS Network Manual
System Manual, Edition 04/2009, C79000-G8976-C124-03
261
Figure C-1 Mechanical protection of the bus cable
Figure C-2 Interrupting the conduit at an expansion joint
Bus Terminal RS485
The installation of electrical bus cables in a protected area is supported by the use of the
RS485 bus terminal. This allows the attachment of end devices and service and
commissioning work on the end devices without needing to move the actual bus cable.
Redundant bus cables
The installation of redundant bus cables involves special requirements. Redundant cables
should always be installed on separate cable racks to avoid simultaneous damage by the
same event.
Do not operate trailing or festoon cables if they are twisted
To ensure that the working life of trailing and festoon cables, make sure they are not twisted
during installation. A line is printed on the outer sheath along the length of the cables to allow
the cable to be checked for twists.