Siemens SIMATIC S7-1500 System Manual page 210

Maintenance
13.2 Replacement of I/O modules and front connectors
3. Additionally for F-modules:
– Carefully remove the electronic coding element from the front connector. Take care
– Insert the removed electronic coding element into the new front connector.
Figure 13-8
4. Insert the new front connector into the existing I/O module, until your hear it click into
place.
5. Wire the new front connector.
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not to damage the coding element.
Removing the electronic coding element from the front connector and inserting it into
a new front connector
Automation system
System Manual, 09/2016, A5E03461182-AD