PAC means "Programmable Automation Controller". This is a category of intelligent devices with the felxibility of a PC but the robustness of a PLC. At National Instruments we call
cRIO,
PXI and
cFP products PAC devices.
By definition cDAQ is not a PAC device as without an integrated controller it can't act as a standalone device. In fact cDAQ is a data acquisition device that from a functional point of view is comparable to other USB-DAQ devices or Plugin-DAQ boards.
For more information about PAC please refer to
this whitepaper.
Best regards,
Jochen Klier
National Instruments Germany