DC link components   
8.2 Control Supply Module CSM 
  SINAMICS S120 Combi 
160  Manual, Edition 07/2012, 6SL3097-4AV00-0BP3 
8.2.7  Installation 
 
①  Delivery condition with spacer - mounting depth for drive line-up in booksize format with internal air cooling 
②  Spacer removed - mounting depth for drive line-up in booksize format with external air cooling 
Figure 8-10  Methods of installing the Control Supply Module with and without spacer 
The Control Supply Module can be attached to the control cabinet panel with or without 
spacers.