Siemens SIMOTION D410 Manual page 72

Connecting
6.3 Safety information for wiring
established using cable cross-sections as listed in the table above or, as a minimum, with the
same conductivity.
Figure 6-2
Communication links
Within the same control cabinet, no equipotential bonding conductor is required for fieldbus
components if they installed as described above.
You have to ensure equipotential bonding for communication connections between remote
components in a system (e.g. devices in different control cabinets) as well as between buildings
or building sections.
If, for example, data cables (PROFIBUS, PROFINET, Ethernet or DRIVE‑CLiQ) are routed
through several control cabinets, equipotential bonding must be established with an
equipotential bonding conductor. Install the equipotential bonding conductor together with the
data cable.
The following minimum cross-sections are required according to IEC 60364-5-54:
72
Protective conductor connection, cabinet without equipotential bonding surface
SIMOTION D410
Manual, 04/2014