ABB AC 800M User Manual page 80

Shielding and data line connection
The connections between the cable shield and the metallic housings as well as the
connections between the shields of the different cable segments have to be low-
impedance (for high frequencies). As far as unshielded devices are connected to a
shield cable further methods may be applied to reduce the impact of noise (for
example galvanic isolation or filtering).
Figure 29. Ideal combination of shielding and grounding
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Section 3 Fieldbus Topologies
3BDS009029R5001 B