Solution
No, NI DAQ (or PXI(e)) devices are not SCPI compliant. Instead, we have developed
NI-DAQmx which is the driver needed to communicate with our NI hardware. The NI-DAQmx driver can be used to program in LabVIEW, LabWindows/CVI, and Measurement Studio for Visual Studio .NET.
As for SMU devices, they also do not support SCPI commands, and instead, the
NI-DCPower driver API should be used for communicating with such devices.