@unit-005 that should be OK. The starting current of the motor will be a lot higher than 1.2A if you command full power immediately, but a short-term surge of 10A should not cause the Duet a problem. You can work out the starting current if you measure the resistance of the motor and divide that into 24V. Measure the resistance several times, turning the shaft slightly between readings, and take the lowest value.
If you decide that you do need to use 48V supply for your motors then please send me a direct message via the Chat function.