If you have QUARC installed, type qc_show_demos in the MATLAB command window.
On the left pane, contents tab, expand the QUARC Targets browsing tree.
Click on User’s Guide.
Click on QUARC Data Acquisition Card Support.
Look for the card you are interested in and click on its name. Each card has a help page with complete information.

If QUARC has not been installed yet, check the Release Notes. Click on User’s Guide, then click on QUARC Data Acquisition Card Support.