LED Functionality

The PXIe-8521 includes two LED indicators per port to help you monitor hardware and bus status.

Table 2. PXIe-8521 LED Indicators
LED Label LED State LED Color Condition
LINK/ACT Off —

No link established

Default power-up state

Solid Green Link established, 100 Mbits/s
Blinking Green Activity, 100 Mbits/s
STATUS Off — Default power-up state
Solid Green Direct Mode, master (PHY state)
Amber Direct Mode, slave (PHY state)
Fade in and out[1] Green Tap Mode, master (PHY state)
Amber Tap Mode, slave (PHY state)
Blinking Green Port ID
Amber Not synchronized
Red Catastrophic error[2]

1 When in Tap Mode, ports that are paired fade in phase with each other, but out of phase with other ports.

2 In the case of a catastrophic error, recover by invoking Reset on the module in MAX. Contact NI for further support if the error continues to occur.