Siemens Simatic CFU Commissioning Manual page 111

Direct grounding
If equipotential bonding (e.g. equipotential bonding line) is routed between explosion-prone
areas and safe areas, direct grounding can be implemented.
Note
Direct grounding on the CFU
The protective braided shield of the field bus cables must be grounded securely.
Additional information
● Section "Grounding SIMATIC CFU PA bundle with aluminum enclosure (Page 123)"
● Section "Connecting the cable shields of the PROFIBUS PA cables (Page 122)"
SIMATIC CFU
Commissioning Manual, 07/2018, A5E39252870-AC
11.2 Grounding for configuration with SIMATIC CFU PA bundle with aluminum enclosure
Compact Field Unit in the enclosure for use in a hazardous area
111