Siemens SINAMICS S120 Equipment Manual page 270

Control Units, Control Unit Adapters and operating components
8.4 Control Unit CU310-2 DP (PROFIBUS)
Figure 8-12
The memory card in a faulty CU310-2 DP
If you are returning a faulty CU310-2 DP to Siemens, remove the memory card and keep it in
a safe place.
This ensures that all your saved data (firmware, licenses, parameters) will be available to
you immediately again to commission a replacement unit.
268
CU310-2 DP Inserting the memory card
Manual, 06/2019, 6SL3097-5AL00-0BP1
AC Drive