Yes, Wayne, the chassis PFI lines should work fine. To do, this iyeager, you want to specify the internal name of the chassis counter. The problem is that you are using the DAQ Assistant and it won't let you select internal channels. This is possible to get around and I actually started typing up the instructions before I realized it was rediculous and not worth the effort. There is a better way.
I recommend starting with one of our examples. If you want to chose the internal chassis counter name from a list,
right click on the physical channel constant/control and select "I/O
Name Filtering". Check the "Internal Channels" box. In Create Channel, you should use something along the lines of "cDAQ1/_ctr0". To the right of the create channel, you'll need to insert a DAQmx Channel property node. Left click on the "property" and select "Counter Input" and then your appropriate measurement type, and then "Input Terminal". Specify your input terminal as "/cDAQ1/PFI0".
