Profilux 4 connects to Profilux 3.1T

Hi:
I have a Profilux 3.1T Ultimate-Set already.For control more capabilities,I had intended to buy a Expansion box 2.
Now,the new Profilux 4 is coming, My question is if i can connect Profilux 4 to Profilux 3.1T directly, and use Profilux 3.1T as a Expansion box?
thanks!

Quote:

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can I use Profilux 3.1T as a Expansion box?

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No, that´s not possible

Thank you for your advice :o