ProSoft Technology PTQ-PDPMV1 - Manual (Page 283)

PTQ-PDPMV1 ♦ Quantum Platform Reference
PROFIBUS DP Master Network Interface Module for Quantum User Manual
ProSoft Technology, Inc. Page 283 of 306
August 12, 2014
Grounding and Shielding for Systems with Equipotential Bonding
Each cable shield should be galvanically grounded with the earth using FE/PE
grounding clamps immediately after the cable has been connected to the cabinet.
This example indicates the shielding connection from the PROFIBUS cable to the
FE/PE rail.
Note: An equalization current can flow across a shield connected at both ends because of
fluctuations in ground potential. To prevent this, it is imperative that there be potential equalization
between all the attached installation components and devices.
This example indicates the system components and devices in a system with
equipotential bonding.
Grounding and Shielding for Systems without Equipotential Bonding
Note: Grounding and shielding is to be carried out the same as for systems with equipotential
bonding.
If this is not possible because of system or construction specific reasons
however, use distributed ground with a capacitive coupling of high frequency
interference signals.