I am using NI 9211 together with cdaq NI 9717. I wonder what is the meaning of 14S/s "aggregate". As stated in the datasheet that the sampling rate for NI 9211 is 14S/s which also means the conversion time is 70ms per channel, but when I tested in the NI MAX by input "14Hz" in the timing setting , it shown with an error message: Error -200332 occurred at DAQ Assistant.
Specified sample rate is higher than the fastest rate supported by the device.
Generally if its S/s/ch then its the sample rate for each channel.
If its S/s then its for all channels combined .I
if you use all the four channels then your sampling rate is reduced by 4. ( probably MUX used in back ground for switching between channels).However if you are only testing two channels then it should be reduced by 2.