Which Driver?
Pickering Direct I/O (Pilpxi)
For simplified card control just install with the Direct IO Driver option
NI-VISA (Pilx40)
Requirement for using NI Products such as MAX, Labview, Teststand etc
Note:- This also installs the Pickering Direct driver for use with Pickering Utilities.
IVI Driver (Pi40iv)
Requirement for using specialised control such as NI Switch Executive.
If in doubt install the Pickering software and select the Visa option during the install, as this allows use of the Pickering direct driver also.