Chapter 3
Connector and LED Information
©
National Instruments Corporation
3-6
PWR/ACT LED Indicator
The PWR/ACT LED indicator indicates device stat
u
behavior of the PWR/ACT LED.
Table 3-2.
PWR/ACT LED Status
LED State
Device Status
Not lit
Device not powered or device error. Refer to
ni.com/
s
upport
if
device is powered.
On, not blinking
Device error. Refer to
ni.com/
s
upport
.
Single-blink
Operating normally. Connected to USB Hi-Speed port. Refer to the
NI USB-621x Specifications
for more information.
Do
u
ble-blink
Connected to USB F
u
ll-Speed port. Device performance might be
affected. Refer to the
NI USB-621x Specifications
for more information.
