Configure firmware   
2.5 "Security" tab 
  Firmware/BIOS description SIMATIC IPC BX-39A, IPC PX-39A, IPC PX-39A PRO 
30  Operating Instructions, 01/2023, A5E51110693-AA 
2.5.2  TLS Certificate Manager 
2.5.2.1  "Import Certificate" 
Calling "Security" 
Select: "Setup Utility (Page 10)" > "Security" > "TLS Certificate Manager" > "Import Certificate". 
 
With this function, TLS certificates can be imported from a USB stick. The TLS certifi-
cates are used, for example, to validate the certificate chain during HTTPS boot. 
2.5.2.2  "Delete Certificate" 
Calling "Security" 
Select: "Setup Utility (Page 10)" > "Security" > "TLS Certificate Manager" > "Delete Certificate". 
 
TLS certificates can be removed with the function.