Crouzet millenium 3 digital sandwich extension xe10 and xn06 r485 crouzet 88970321 this crouzet millenium 3 24v xe10 digital sandwich extension is used for connection between the crouzet millenium 3 expandable controller and the crouzet millenium 3 termination extension when control of between 40 and 50 inputsoutputs is required this sandwich extension is powered via the controller at the same voltage as the input being 24v dcthis product is used in applications such as heatingair condit