National Instruments PXIe-6674T, User Manual

Page: 10 / 36

Table 1. Access LED Color Indications
Color Status
Off Module is not yet functional.
Green Driver has initialized the module.
Amber Module is being accessed. The Access LED flashes amber for 50 ms when the
module is accessed.
Blinking Red Module has detected an over-temperature condition.
Solid Red A hardware error has been detected.
Caution If the Access LED is observed to be blinking red, the module has detected
an over-temperature condition. Continued use of the PXIe-6674T in this condition is
not recommended as product reliability has been compromised. Since several
common problems can cause an over-temperature condition, please investigate the
following:
•
Check that all chassis covers, filler panels, and/or slot blockers are installed.
• Make sure that the chassis fan speed is set to the highest setting.
• If applicable, check that the chassis fan air intake is not blocked and that the fan
filters are clean.
• Make sure that the ambient temperature around the chassis isn't above the rated
temperature specifications. If so, move the chassis to a cooler ambient
temperature location.
Caution If the Access LED is observed to be solid red, a hardware failure has been
detected that may impact the performance of the PXIe-6674T. Contact National
Instruments for support.
Active LED
The active LED indicates an error or phase-locked loop (PLL) activity. You can change the
Active LED to amber, unless an error overrides the selection. Refer to
Figure 3. on page 9 for
the location of the active LED.
Tip Changing the Active LED color to amber is helpful when you want to identify
devices in a multichassis situation or when you want an indication that your
application has reached a predetermined section of the code.
Table 2. on page 11 summarizes what the Active LED colors represent.
10 | ni.com | PXIe-6674T User Manual