Hi Himanshu,
Allow me to offer some input on your questions:
>Can I interface the stepper motor directly to the CB 68 LP I/O board (PCI 6024E card)?
Since the current requirement of your stepper motor is 1A, the DAQ card cannot source enough current to drive your motor. You would need to have a driver circuit or motor amplifier to source the current necessary to energize the coils in your motor. If you are using the digital lines on the 6024E card, the TTL high (+5V) can only output 13mA. You can find this information in the 6024E manual at
ni.com/manuals and searching for the 6024E manual.
>Can I interface the PCI 6024E to the stepper motor without any damage to the card?
If you exceed any specifications to the DAQ card, you can damage the board. This is typically applying too much voltage or current directly to the card. If you are trying to use the digital output ports on the DAQ card to drive the motor directly, it actually won't work and should not do any damage. Since the digital outputs cannot source enough current, you will see that it will be unable to hold the voltage. It is not advisable to connect the motor directly to the card without a driver circuit or motor amplifier. You could potentially damage the card if you accidentally short other components or connect the motor up in other ways
>Please guide me as to how I should proceed?
>Since the motor I am using is a 4 phase motor then what kind of driver will you suggest??
The easiest way to drive a stepper motor is to use hardware that is designed specifically for the application. You can find such products by visiting
ni.com/motion.
>I want to avoid drivers and try and test the stepper motor directly with PCI 6024E cards?
Unfortunately, the card cannot source that much current to drive the motor. You'll need an external power supply with driver circuit, or a dedicated motor amplifier to have your motor turn.
Hope this helps!
Wilbur Shen
Web Support and Operations
National Instruments