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Release 03/2004
Operating Instructions (Compact) OP 77B
4–2
6AV6691-1EA01-0AB0
4.1 Connecting the Potential
Equalization
Connection configuration
1
2
4
5
3
3
1
Grounding connection on the HMI device
2 Grounding
cable
3 Switching
cabinet
4 Grounding
connection
5 Potential
equalization
line
Figure 4–1
Potential equalization line connection
Notice
Potential equalization line
Line shields are not suitable for potential equalization.
Only use the potential equalization lines recommended
– refer to Figure 4–1. Potential equalization lines, for
example, must have a minimum cross-section of
16 mm
2
. When setting up MPI and PROFIBUS DP
networks, ensure cables with a sufficient cross-section
are used otherwise the interface modules may be
damaged or even destroyed.