Siemens SINAMICS S120 Equipment Manual page 392

Accessories
7.2 DC link rectifier adapter
CAUTION
To ensure safe electrical separation, the 24 V supply cables and those for the DC link
connection cables must be physically separated (> 100 mm), or the 24 V cables must be
doubly insulated (e.g. light plastic-sheathed cable).
The DC link connection cables must be routed in such a way as to ensure that they are
ground-fault and short-circuit proof in accordance with DIN/VDE 0100 or suitable fuse
protection must be provided.
CAUTION
The total length of the DC link (including the connection cables) must not exceed 10 m.
392
WARNING
Equipment Manual, (GH2), 07/2007, 6SL3097-2AC00-0BP5
Booksize Power Units