PROFINET Installation Guideline for Cabling and Assembly

• Connect the metal cable trays to
the equipotential bonding system
as often as possible.
PROFINET cable assembly work
• Use flexible grounding straps at expansion joints or articulated joints.
Grounding straps are normally available from the cable manufacturers.
• When fiber optic cables are used for interconnections between buildings or
parts of buildings. No equipotential bonding is required due to the immunity of
fiber optic cables to electromagnetic interference, as long as the cable is free
of metal.
2.3.4 Connecting cable shields to the equipotential
bonding conductor
The shield is an important part of the PROFINET copper cable. It shields the data
wires in the cable against electromagnetic interference coming from the
environment. To make sure that the shield can properly provide this function, it must
be connected to the plant’s equipotential bonding system. The general principles of
connecting the PROFINET copper cable shield to the equipotential bonding system
follow:
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Equipotential
bonding system