Siemens SINAMICS G150 Operating Instructions Manual page 160

Electrical installation
4.11 Other connections
Interface overview
Figure 4-31
MAC address
The MAC address of the Ethernet interfaces is indicated on the upper side of the CBE20.
The plate is not visible when the module is installed.
Note
Remove the module from the option slot of the Control Unit and note down the MAC address
so that it is available during subsequent commissioning.
158
Communication Board Ethernet CBE20
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A