If you need to aquire images at exactly the same time it will require using two 1409 boards and trigggering the camera simultaneously from the same signal. If you use one board with multiple camera, you will not be able to get images at exactly the same time. This is because there is only one A to D converter on the board which must be shared between channels, so you will have a slight delay of approximately one frame from when the camera is reading one channel to the next. If you trigger the cameras simultaneously, they will both be sending information into the baord, but only one can be read at a time, so the second would not be taken in. Below is a link to approaches for coinnecting multiple cameras:
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067
f3cc/ff3c5c368e34a12286256ac6004bd844?OpenDocument
I hope this helps!
Chris D
