Use an auxiliary power source to enable the full-power capabilities of NI instruments that support this feature. NI-DCPower can dynamically query whether the auxiliary power is connected to the device.

The NI-DCPower Auxiliary Power Source Available property returns TRUE if auxiliary power is connected to the device and FALSE if only internal power is available on the device.

NI instruments cannot differentiate between an auxiliary power loss or a blown fuse on the auxiliary power input line. If auxiliary power is properly connected and Auxiliary Power Source Available returns FALSE, you might need to replace the auxiliary power input fuse.