[kamocat]

This is a good point, but it doesn't seem to add up.
Most of the inputs have a resistor (1k or greater) inline with their power supplies. There are two exceptions to this: the encoder and the brake/coast jumper.
Furthermore, limit switches are active when they are left OPEN. Their default state is closed (when the jumper is installed). This means a limit switch must be "normally closed", and break the connection when pressed. When a limit is pressed, it is drawing LESS power than when it is.

It was a good suggestion, though. I'm curios how close the Jaguar is to drawing more than their power supplies can handle.