Siemens SINAMICS DCM Operating Instructions Manual page 442

Descriptions of functions
10.25 Serial interface with peer-to-peer protocol
Parallel connection
Up to 31 drives receive the same setpoints from drive 1.
1) The shields for the interface cables must be connected directly on the units (using a clamp, for example) to unit or
cabinet ground, with a low level of impedance.
2) Twisted cable, e.g. LIYCY 2×0.5 mm
that the difference in ground potentials between the link partners remains below 7 V.
Figure 10-65 "Parallel connection" peer connection type
442
; with longer cables, an equipotential bonding cable should be used to ensure
2
SINAMICS DCM Control Module
Operating Instructions, 06.2010, C98130-A7067-A1-02-7619