Midas PRO2 Owner's Manual page 249

Rear panel connections
AES3
The AES3 section has two pairs of input and output connectors for synchronisation
with external devices that can transmit/receive a 96kHz AES3 signal.
Talk back
The talk back input connector accepts a female input XLR.
AES50 audio
Six AES50, 24-wide, bi-directional digital audio EtherCon® ports.
PRO2 Live Audio System
Owner's Manual
out 3 & 4
in 3 & 4
231
in 1 & 2
out 1 & 2