Siemens CP 1243-8 IRC Operating Instructions Manual page 6

Preface
Firmware
The firmware is signed and encrypted. This ensures that only firmware created by Siemens
can be downloaded to the device.
Training, Service & Support
You will find information on Training, Service & Support in the multi--language document
"DC_support_99.pdf" on the data medium supplied with the documentation.
6
Operating Instructions, 06/2015, C79000-G8976-C385-01
CP 1243-8 IRC