I think you mean the maximum and not minimum scan rate. The minimum scan rate could be one sample every three months.
The maximum scan rate for your card depends on a number of things. In short bursts, you can take 200k samples/second/number of channels to be read. Remember that a scan is one reading from every channel to be read. Each channel on the card is multiplexed to one analog to digital converter, so scanning speed goes down as more channels are added. With fancy coding (look in the LabVIEW shipping examples) and a reasonably fast computer, there is no reason that you could not perform this level of sampling continuously.
As far as the frequency of the signal to be sampled goes, Nyquist formula suggests that the signal being sampled should
be at least half the frequency of the sampling device. In practical use, you will find better readings when running your card at 5 times or even better 10 times faster than the frequency of your signal.
In the future, you might consider posting to the DAQ (data acquisition) forum. Those folks would be more familiar with hardware related questions.
Have a great day.
Jeremy
