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Chapter 3
Hardware Overview
Fan Monitoring
Additional Monitoring Features
Front Panel LEDs
NI PXI-8250 User Manual
The NI PXI-8250 module allows the user to monitor the revolutions per
minute (RPM) of all rear-facing fans of a PXI chassis (two fans in an
NI PXI-1042/1042Q and three fans in an NI PXI-1045), accurate to
±50 RPM. The fan data from the chassis is interpreted by the NI PXI-8250
and the FAN front panel LED reflects the status of all of the fans
collectively together. Hence, if one or more of the fans becomes
non-operational (status below 1500 RPM) the LED will turn red to indicate
a fan error. Otherwise, the fan LED will light green if all of the fans are
operating within normal tolerances.
In addition to the system status monitoring features, the NI PXI-8250
module includes an alert relay and fused power outputs. These features are
useful for user-defined monitoring applications. Refer to the
Connector
section for more information on the fused power outputs.
The NI PXI-8250 has 12 front panel LEDs, including 6 system status LEDs
and 6 user-configured LEDs, as shown in Figure 3-4. Upon boot, all
12 LEDs will flash orange while it is being configured. The module then
turns the LEDs off for 7 seconds until the first valid sample set is acquired.
1 System Status LEDs (x6)
Figure 3-4. NI PXI-8250 Front Panel LED Diagram
2 User LEDs (x6)
3-4
Front Panel
1
2
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