Gateway component Sercos
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Potential equalization
Potential differences occur when devices are connected to different
earths. These potential differences cause malfunctions.
To prevent malfunctions, you have to route an equipotential
equalization conductor.
When doing so, bear in mind the following points:
– Select an equipotential equalization conductor with low impedance.
– Select the following as a reference value for the cross-section of the
potential equalization cable:
– 16 mm
2
for potential equalization cables of up to 200 m in length
– 25 mm
2
for potential equalization cables of more than 200 m in
length
– Use potential equalization cables made of copper or galvanized steel.
– Connect potential equalization cables extensively with the earth rail.
– The smallest surfaces possible should be sandwiched between
potential equalization cables and signal cables.
If the devices of the control system are connected by shielded signal
cables that are earthed on both sides, the impedance must be 10%
of the shielding impedance.
Installation
