Navid,
typically DC motors are not driven by a proportional current signal, but by a PWM signal which is provided by an
H-bridge circuitry that allows bidirectional moves.
So you either could use an external power drive, that accepts a +/-10 V input signal from the NI 9264 or you could replace this module with an
NI 9505, that has a powerful H-bridge circuitry built in in addtion to quadrature encoder inputs, which are typically required for a motion control application, too.
Please note, that the NI 9505 can only be used in a
cRIO chassis but not in a
cDAQ chassis. In general for a motion control application should be done with a cRIO system and not with a cDAQ system, as you won't be able to run a stable and deterministic control loop with a cDAQ system.
Kind regards,
Jochen Klier
National Instruments