BECKHOFF CX2020 - Manual (Page 18)

Product overview
On inserting the CFast Flash card it engages again with a soft click. The card is seated correctly if it is flush
with the front side of the device housing.
2.8 CFast card
The CFast Flash Card (CFast Card) is a non­volatile memory.
Data to be retained in the event of a power failure should be saved on the CFast card. The CFast card
operates like a hard disk.
Note
Using CFast cards
We strongly recommend that only CFast cards supplied by Beckhoff Automation GmbH
should be used. These are industrial CF cards with a higher number of write/read cycles
and an extended temperature range (+85 °C). Proper operation can only be guaranteed
with CFast cards from Beckhoff Automation GmbH!
CX2020, CX2030, CX2040 18 Version 1.2