National Instruments NI USB-9234 - Manual (Page 10)

NI USB-9234 User Guide and Specifications 10 ni.com
LED Indicator
The NI USB-9234 device has a green LED next to the USB connector.
The LED indicator indicates device status, as listed in Table 1. When the
device is connected to a USB port, the LED blinks steadily to indicate that
the device is initialized and is receiving power from the connection.
If your device is not blinking, make sure your computer has the latest
version of NI-DAQmx installed on it, and that the computer is not in
standby mode.
Table 1. LED State/Device Status
LED State Device Status
Not lit Device not connected or in suspend.
On, not blinking Device connected, but no module installed.
Single-blink Operating normally.
Double-blink Connected to USB Full-Speed port. Device performance
might be affected. Refer to the
Specifications section for more
information.
Quadruple-blink Device error. Refer to ni.com/support .