Led indicator, Table 1. led state/device status – National Instruments NI USB-9234 User Manual
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NI USB-9234 User Guide and Specifications
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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
section for more
information.
Quadruple-blink
Device error. Refer to
ni.com/support
.