Figure 7. PXIe-1090 Cooling Clearances
44.5 mm
(1.75 in.)
44.5 mm
(1.75 in.)
Note
Failure to provide these clearances may result in undesired thermal-related
issues with the chassis or modules.
To aid in thermal health monitoring for either rack or benchtop use, you can monitor the
chassis intake temperatures in Measurement & Automation Explorer (MAX) to ensure the
temperatures do not exceed the ratings in the
Operating Environment
section of the
PXIe-1090
Specifications
.
Additionally, many PXI modules provide temperature values you can monitor to ensure
critical temperatures are not exceeded. Increasing chassis clearances, ventilation, reducing
external ambient temperatures, and removing nearby heat sources are all options for improving
overall chassis thermal performance.
Chassis Ambient Temperature Definition
The chassis fan control system uses ambient intake air temperatures for controlling fan speeds
when in Auto mode. These temperatures may be higher than ambient room temperature
depending on surrounding equipment and/or airflow blockages. Ensure ambient intake
temperatures do not exceed the ratings in the
Operating Environment
section of the
PXIe-1090
Specifications
. You can monitor the module ambient intake temperatures in NI Measurement
& Automation Explorer (MAX).
Setting Fan Speed
The PXIe-1090 chassis supports multiple fan operating modes. Refer to the
Fan Mode
section
for more information.
Installing Filler Panels
To maintain proper module cooling performance, install filler panels (one is provided with the
chassis) in unused or empty slots. Secure with the captive mounting screws provided.
Installing Slot Blockers
You can improve the cooling performance of the chassis by installing optional slot blockers.
Refer to the NI website at
and enter the Info Code
slotblocker
for more
information about slot blockers.
10
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ni.com
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PXIe-1090 User Guide
