System overview 
2.1 SINAMICS S120 Combi components 
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SINAMICS S120 Combi 
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5 
Figure 2-1  Connection example, S120 Combi 4-axis Power Module with 2 expansion axes connected to SINUMERIK 
828D (maximum expansion stage)