I/O Type >> Analog Input >> Timing >> Simultaneous Sampling Supported

NI-DAQmx C Properties

I/O Type >> Analog Input >> Timing >> Simultaneous Sampling Supported

Data Type: bool32
Description: Indicates if the device supports simultaneous sampling.
Restrictions: Not Settable

You can get this property using:
  DAQmxGetDevAISimultaneousSamplingSupported