Siemens SINAMICS S120 Equipment Manual page 515

Two-tier configuration
Figure 9-7
Continuation of the DC link with the DC link adapter (installation above) external to the
components is achieved using single-core, finely-stranded and shielded cables that are laid
so as to ensure they are short-circuit and ground-fault proof.
The distance between the two module rows primarily depends on the wiring and cable cross-
section.
Booksize power units
Manual, (GH2), 06/2008, 6SL3097-2AC00-0BP6
Example of a two-tier configuration with components between 200 and 300 mm wide
Cabinet Design and EMC Booksize
9.4 Arrangement of components and equipment
515