Hi,
As I'm slowly etching towards finally building my first β22 (3ch), I stumbled across ε12 and ε24 again, and wondered how to integrate them. As far as I can tell, the build could look like this:
A σ24 connects to the AC inlet, providing the 12VAC to the ε24. The ε24 in turn drives a 12V relay (ε24 note 1), which connects a ε12 and σ22 together. ε12 and σ22 in junction then connect to the β22 boards as detailed on the ε12 page.
Casing wise, I would put σ24, ε24 and its relay in the same case as the σ22, and the ε12 close to the β22 boards in their case. Sounds right?
Greetings from Germany.