Seaking information Compumotor M83-135 Stepper Motors

I have 3 Compumotor M83-135 Stepper motors and can not seem to
locate the voltage requirments for these steppers. Anyone have a
clue? Here is what I do know about it.

Torque 400oz
Max driver input 1.8A
Max current per phase 2A

I will be controlling these motors with Compumotor C Series drivers.
The Drivers can support 12 - 90v supply to the steppers. IF you have
any information as to what size power supply I need would be great.
I would really like to only have to build one power supply if
possible. Again any help is highly appricated.

Thanks,

Shawn