Siemens SINUMERIK MCU1720 Equipment Manual page 94

Spare parts/accessories
11.2 Installing and removing CFast cards
4. Push CFast card into the slot until it snaps into place.
5. Close and lock the cover.
Removal
Remove the CFast card from the memory slot by pushing it in until it is ejected by about 5 mm.
Proceed in reverse order.
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Equipment Manual, 09/2019, A5E47437728B AB
MCU 1720