PROFINET Installation Guideline for Cabling and Assembly

PROFINET cable assembly work
2.3 Grounding and equipotential bonding
Good grounding and equipotential bonding are vital to the resistance of PROFINET
networks to electromagnetic interference. Grounding of the PROFINET cable screen
shall be done at both ends of every cable (i.e. at each device) to reduce the impact
of electromagnetic interference. Equipotential bonding ensures that the ground
potential is identical throughout the entire PROFINET network, so providing
protection against equipotential bonding currents which could otherwise flow
through the PROFINET cable shield. Basic information on the installation of
grounding and equipotential bonding is given below:
Manuf.
instructions
Manufacturer instructions:
Read and observe the manufacturer’s instructions. These instructions
provide important information on how to best connect the PROFINET
node to ground and to the equipotential bonding conductor.
2.3.1 Protective ground
Protective ground is principally provided to protect people against electrocution in
the case of a fault. The protective ground also protects devices, machines and plant
equipment against more serious damage in the case of faults. The frame, case or
cabinet of electrical equipment shall be connected to protective ground via ground
wire that can carry the full fault current.
Protective ground is illustrated by the following symbol:
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