User Documentation

Planning
2053260000/05/2015
31
2.9.4 Connect the shielding with the equipotential bonding.
The shielding is an important part of the PROFINET copper cable.
This shielding protects the data wires in the cable against electromagnetic
interference.
For the shielding to perform this function, it must be connected to the
equipotential bonding of the system.
Connect the shielding of the PROFINET copper cables to the equipotential
bonding at the following points:
• At PROFINET devices
The equipotential bonding is implemented using the
appropriate connector and by connecting the cable to
the equipotential busbar.
• At the cabinet entry
Connect the shielding of the PROFINET cable to the
equipotential bonding at the entry to the control
cabinet. This means that interference that acts on
the PROFINET cable outside the control cabinet is
prevented from being directed into the cabinet.
To achieve this, mount an equipotential busbar behind
the strain-relief on the cabinet entry.