PXIe Chassis Family
User Guide
43
4 Chassis Alarm Architecture
The chassis provides eight alarms to assist you in monitoring the chassis. For
example, you can set a temperature alarm threshold such that, if a chassis
temperature sensor reports a temperature above the threshold, an alarm will be
generated. Alarms can be set and monitored programmatically and by using the
Soft Front Panel (SFP). The eight alarms are:
– Five voltage rails (+3.3 V, +5 V, +12 V, –12 V, 5.0V_STANDBY) are either
lower than expected or higher than specified thresholds
– Chassis air temperature is higher than the specified threshold
– Fan Speed is slower than the specified threshold
– 10 MHz Reference Clock changed
Figure 14 on page 45 describes the chassis alarm architecture, including
identifying the functionality that is provided in hardware and the functionality
that is provided in software. The figure also describes how alarms operate if
multiple processes are using the same alarm.
The M9018B and the M9019A both have eight temperature sensors
in the chassis. The M9010A has five temperature sensors.
The M9018B and M9019A have a default minimum fan speed of
1200 RPM, but it is 900 RPM for the M9010A.
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