Power Considerations For The Ni 4350 (Usb) - National Instruments NI 4350 User Manual

Power Considerations for the NI 4350 (USB)

Note:
Note:
© National Instruments Corporation
The NI 4350 (USB) is designed to remain powered only when the USB
cable connects it to the host PC and the PC is powered.
The NI 4350 (USB) is designed to run in a stand-alone mode, drawing
power only from the USB cable. There are circumstances when the
NI 4350 (USB) may require more power than the USB power supply
can safely deliver, so if the NI 4350 (USB) tries to draw more than the
allowed current from the USB power supply, internal protection
circuitry will turn off most of the circuitry in the NI 4350 (USB) to
protect the USB supply. This over-current condition makes the LED
blink in the power supply overload pattern described in Table 2-1.
When the NI 4350 (USB) turns off, any data acquisition in progress will be
aborted and the data will be lost.
The host computer has the ability to go into a power-saving suspend
mode and, during this time, the NI 4350 (USB) can go either into a
low-power mode also or remain in a fully powered, static state. This
low-power mode is important if you are using a laptop or if power
consumption is a concern.
In the powered, static state of the NI 4350 (USB), all digital outputs will
be static at a fixed voltage.
Refer to the NI-DAQ function, Set_DAQ_Device_Info, in the NI-DAQ
documentation or to the Set DAQ Device Information.vi in the LabVIEW
documentation to change the settings that determine the behavior of the
NI 4350 (USB) during the suspend state. The default setting is to remain
fully powered.
Chapter 2
2-5
Installation and Configuration
NI 4350 User Manual