Siemens SINUMERIK 840D sl Manual page 32

Structure of the drive group
2.3 Current Carrying Capacity of the DC Link Busbar
Example 2:
Connection of several Motor Modules with the same current carrying capacity of the DC link
busbar to a Line Module with center infeed.
Figure 2-10
Note
Due to the design, center feed is possible only for power units with rated output current of
the Line Modules ≥ 55 kW.
The single side infeed would produce an overloading for a 60 A Motor Module. This
construction variant is not permitted.
Figure 2-11
2-12
Infeed from left and right (center infeed)
Overloading of the DC link busbar for a 60 A Motor Module
Guide for the SINUMERIK 840D sl machine configuring
Manual, 07/2006 Edition, 6FC5397-6CP10-0BA0