Hello,
I want to connect my UR5 to a production network, therefore I need to know the MAC-Adress.
Can somebody tell me where I can find it?

@Stefan_Stubgaard can you help? 

If you need to find it you will probably need to go to the command line on the robot. You'll need to plug a key board into the robot. Just a note, the keyboard encoding is Danish. There are instructions on the UR support forum for setting the keyboard for the command line to US or whatever nationality you need. Note, this only applies to the command line, not polyscope unfortunately. 

You access the the command line with either ctrl-alt-F7 or ctrl-alt-F1, one takes you to the command line, one takes you back to polyscope I can just never remember which one when I'm away from the robot.  

Once there you you will need to login, the password is easybot.  You can then follow the instructions below to get the MAC address. 

We we used to hook our robots up directly to our corporate network by assigning a static IP address on the network and then just assigning that to the robot using the setup screen. We actually assigned blocks of static IP addresses out so that we could give them to the robots and any TCP/IP hardware that was attached to them such as expansion I/O. 

Yes my problem is solved!  Thank you very much. :)