ProSoft Technology MVI56-PDPS - Manual (Page 75)

Reference MVI56-PDPS ♦ ControlLogix Platform
Profibus DP Slave Communication Module
ProSoft Technology, Inc. Page 75 of 88
April 22, 2008
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 is 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.