As I understand it everything eventually operates on the same EMS bus and therefore only one circuit board is needed. To control the temperature you need to set the thermostats that are on the bus. So you don't bypass the thermostats but you can override any setpoint they have. But how this works ...

Hi @bbqkees, I want to control my Buderus heating installation using 0-10v outputs (start temperature control). The current controllers are one RC300 (heating floor, low temp) and one RC200 (radiators, high temp). So there are 2 distinct circuits with one MM100 module each. Is there any way I can ...