It does not accept ADAT, so you have to set ADAT2 to SPDIF format. And then you need to route the signal to that Hardware Output channel, which is AES (=SPDIF), not ADAT2, in your DAW and TotalMix.

Pls look into your central station manual and search for ADAT, then you will find this information:

"Follow the same instructions for Toslink devices. Toslink is a type of stereo, digital, optical S/PDIF connection found on many consumer audio devices. While the Toslink jack is similar to the ADAT Lightpipe connector, it is not an ADAT port."

So its clear by this that Presonus Central Station is only able to talk SPDIF (not ADAT) protocol on its optical port.

Maybe your babyface was already set to SPDIF format in its driver settings dialog and routing was already fine by occasion.

Please read posting #2 more thoroughly, it contains all that you need to know to configure your UFX properly.

If MC talks about setting ADAT2 to SPDIF, then it should be clear that its all about the ADAT2 optical port. It needs to be set to optical SPDIF protocol, because the presonus device only supports optical SPDIF.

Next thing is to route audio to the proper HW output as MC told.

So in TotalMix FX:
1. Check that you are in submix mode.
2. Click to the correct HW output (see post #2). Now you see the submix for this particular HW output
     by looking at the fader position of HW Inputs and SW playback channels.
     If a fader is raised then it sends audio to the HW output (if there is an audio signal).
     I suggest you concentrate on those channels where you see audio ..
     A little tip, see (*) below
3. Raise the faders of HW inputs and SW playback channels that you want to hear on the presonus device.

(*) On the right side under "Layout Presets" there is a button sub, which you can toggle. It shows you, which audio channels are part of the submix (which send audio to the HW output that you selected in step 2).

From the RME manual:

The button Sub activates another useful special view. When in Submix view, Sub will cause all channels to disappear that are not part of the currently selected Submix/Hardware Output. Sub temporarily shows the mix based on all channels from Inputs and Playback row, independent from the current Layout Preset. That makes it very easy to see and to verify which channels are mixed/routed to the current output. Sub makes checking and verifying of mixes, but also the mix editing itself, a lot easier, and maintains perfect overview even with lots of channels.

Ok, thanks, didn't know.