24 | ni.com | NI USB-6001/6002/6003 User Guide
Connecting the Load
The return terminal for the +5 V source is the D GND terminal. +5 V load should be connected
between the +5 V terminal and D GND. The current delivered by the NI DAQ device at the +5 V
terminal is sourced from the USB connector. To meet the USB specifications, a maximum of
150 mA can be used from the +5 V terminal.
Figure 16. Connecting +5 V Power Source Load
Enable +5 V Power Source
The + 5 V power is always enabled and the voltage is present at the +5 V terminal when the
device is in active mode. The +5 V power source is not available for about one second after the
NI DAQ device is first connected to the USB connector or when the device is in suspend mode.
Related Documentation
The most recent versions of documents are available from ni.com/manuals.
The following references to documents assume you have NI-DAQmx 9.9 or later and, where
applicable, version 8.5 or later of the NI application software.
Examples
To locate NI software examples, go to ni.com/info and enter the Info Code daqmxexp.
NI USB-6001/6002/6003
The NI USB-6001/6002/6003 Quick Start packaged with your NI DAQ device describes how to
install the device and confirm that your device is operating properly.
The NI USB-6001 Specifications, NI USB-6002 Specifications, and NI USB-6003 Specifications
are available for download from ni.com/manuals.
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