You can fit an M-ACE card to a Port A of a modular Surface provided the Surface is equipped with the RAB-2 (Remote Audio Board) module. This will enable the audio and control link to the iDR MixRack. Remember to bridge one of the Surface Network ports to the Control Network port on the M-ACE card, as shown in the User Guides.
Alternatively you can connect the Surface and MixRack via Network. This will give you full control of the MixRack and metering data, but no PAFL, local audio I/O or Talkback. You can patch PAFL to the Surface with analogue cables from the MixRack if required.
Hope this helps.