Appendix
A.2 Protection against electromagnetic interference
S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
A-15
• Always use equipotential bonding conductors made of copper or galvanized steel. Always
connect the cables on a large surface to the equipotential conductor bar/protective
conductor and protect it against corrosion.
• Route your equipotential bonding conductor to minimize the area between the
equipotential bonding conductor and signal lines as far as possible (see the figure below).
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