Valid to UK only - excludes oversized items
As it turns out (excuse the pun) not that much. Most CDUs will have an output of between 25v and 45v DC but will also proudly state that they can operate between three and six point-motors at the same time, and that's the important factor here. It's nice to have the power and ability to operate lots of points simultaneously, but, if you have no choice but to connect your CDU to a power supply of just 12v DC, then don't worry, you will just have to be mindful that multitasking may not be your CDUs forte but for switching turnouts one at a time, 12v through a CDU should be just fine.
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