Siemens SINAMICS S120 Equipment Manual page 468

Accessories
8.2 DC link rectifier adapter for Booksize format
Table 8-10 Installing the 24 V adapter for 150 mm wide components
Unlock and open the protective cover (example:
Active Line Module (36 kW))
Attach the 24 V adapter.
468
Break out the recess using suitable pliers
Close the protective cover
Manual, (GH2), 06/2008, 6SL3097-2AC00-0BP6
Booksize power units