Siemens SIMATIC IPC347E Operating Instructions Manual page 60

Device maintenance
6.4 Removing and installing hardware components
6. Remove the processor.
7. Install the new processor on the socket, as shown in the figure.
When installing the CPU, make sure you aligned the highlighted arrow on the processor
with pin 1 in the CPU socket.
Processor type and clock frequency
If you use a processor of a different type, perform the BIOS update firstly. During the BIOS
update, the microcode matching the processor is loaded. Contact the SIEMENS support to
update the BIOS if you changed a different processor.
Note
Damage to the processor due to high clock frequency
If the installed processor is operated with a higher clock frequency than permitted, it can be
destroyed or cause data loss.
Operate the processor only at a clock frequency that is equal to or less than the permitted
clock frequency.
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Operating Instructions, 09/2018, A5E41134132-AE
SIMATIC IPC347E