The dCCU is an AES system as standard. There are 8 AES inputs and outputs (16 channels in and 16 channels out). Each pair of AES I/O can be replaced by a stereo analogue pair of I/O.
Standard system is:
8 AES inputs and 8 AES outputs.
Add 1 x AIO2 card
7 x AES inputs and outputs
2 x analogue inputs and outputs
Add 2 x AIO2 cards
6 x AES inputs and outs
4 x analogue inputs and outputs
.....and so on.
As an AES connection is 2 channels, replacing this adds 2 analogue channels.
The GDC 6432 AIO2 adds an internal D to A and A to Ds to replace 1 AES with 2 analogue channels.
