BECKHOFF CX9020 - Manual (Page 13)

Product overview
2.7 Micro SD card
The micro SD Flash Card (µSD Card) is a non­volatile memory.
Data to be retained in the event of a power failure should be saved on the µSD card. The µSD card operates
like a hard disk.
Note
Using µSD cards
We strongly recommend that only µSD cards supplied by Beckhoff Automation GmbH
should be used. These are industrial µSD cards with a higher number of write/read cycles
and an extended temperature range (+85 °C). Proper operation can only be guaranteed
with µSD cards from Beckhoff Automation GmbH!
CX9020 13 Version 1.1