Hi Evert!
We only provide official support for using the 1Wire Hub with standard-compliant 1Wire masters.
While it may be possible to turn the RPi into one, our Neurons use a dedicated 1Wire master PCB, which in particular is powered via a discrete 24V-in/2-3.3-5-12-24 out PSU.
In principle what you are asking to do may be possible, but unfortunately we cannot provide any guarantees or instructions.
Perhaps some of our other users here on the forum might be able to help.