Expanding and assigning parameters to the device   
6.2 Open device with expansion slot 
  SIMATIC IPC PX-39A 
64  Operating Instructions, 08/2022, A5E51699601-AA 
Procedure  
 
Remove the marked screws. 
Lift off the front panel in the direction of 
the arrow.
 
Put down the front panel. 
Close the device in reverse order.