Siemens SINAMICS S120 Manual page 62

Control Units and operating elements
4.3 Control Unit CU320-2 PN (PROFINET)
Note
Plant standstill by withdrawing or inserting the memory card during operation
If the memory card is withdrawn or inserted during operation, then data can be lost, possibly
resulting in a plant standstill.
• Only withdraw and insert the memory card when the Control Unit is in a no-voltage
condition.
Note
Insertion direction for the memory card
Only insert the memory card as shown in the photo above (arrow at top right).
NOTICE
Memory card damage caused by electric fields or electrostatic discharge
Electric fields or electrostatic discharge may result in the memory card being damaged.
• When removing and inserting the memory card, always observe the ESD regulations.
Note
Data loss when the Control Unit with memory card is returned
When returning a defective Control Unit for repair or testing, the data on the memory card
(parameters, firmware, licenses, etc.) could be lost.
• Do not return the memory card as well, but keep it in a safe place so that it can be inserted
in the replacement unit.
Note
Please note that only SIEMENS memory cards can be used to operate the Control Unit.
60
Control Units and additional system components
Equipment Manual, 06/2020, 6SL3097-5AH00-0BP2