In addition to the dual voltage of the CGS66, it has a third part meant for digital/logic voltage.
The input to the third channel may either be a dual secondary/centre-tap transformer or a single secondary. If using a dual secondary, do NOT connect D11 and D12.
|Using two transformers - connect earth to ground/0V on both connectors and mount D11 and D12|
|Using one transformer (or two centre-tap transformers): do NOT mount D11 and D12.|
The colors on the dual secondary transformer are the ones used on my Noratel TA050/15:
PS: The Xonik PSU3 has the main smoothing capacitors mounted close to the heat sinks. If the heat sinks get hot, the lifespan of the caps may be reduced.