Powerbar STDL4 or Powerbar 5.1

I have a profilux 3.1T and 1 powerbar 5.1.
This gives me 6 sockets to play with.
In total I would need at least 16 sockets for the new setup and am doubting between:
- adding 2 powerbar 5.1
- adding 1 powerbar 5.1 and one STDL4.

How many powerbars 5.1 can be (PAB) connected in serie to each other and to 1 PAB connection to the profilux?

You can have a continuous chain of PB5.1 strips up the maximum supported 64 controllable sockets. One powerbar daisy chained off of another is not a problem as long as the main powerbar is connected directly to the ProfiLux.

And that is why we love GHL... Great!!!