Check the Specification
document or User Manual
for your device to determine what the output current range is by looking at the Analog Output specifications.
e.g. the NI PXIe-6363 is capable of driving ± 5 mA from any analog output channel. On the ± 10 V range, this means that the lowest total impedance that can be driven at full scale is determined from the highest power output, or largest current & voltage:10V
Taking into account the output impedance of the PXIe-6363, the lowest connected impedance that can be driven at full scale is the difference of the minimum load and the output impedance:
Additional information can be found in the Output Current Drive