Lux,
Hello, although NI-DAQ does not support using the SCXI-1520 in parallel mode, you can directly measure the parallel outputs with a DAQ device.
So, say for example that you want to read channels 0 through 7 of the SCXI-1520, you will have to configure your DAQ board in differential mode and then access each of the channels directly through your DAQ device (channels 0-7).
For more information about this, please see Chapter 2 (pages 2-22 and 2-23) of the SCXI-1520 User Manual
SCXI-1520 User ManualGood luck with your application!