Chapter 4 Understanding the VXI-1200
VXI-1200 User Manual
4-4
© National Instruments Corporation
Cooling System
The module cooling fan is located at the bottom rear of the mainframe
(bench-top configuration). In high ambient temperature conditions of
≥
40
°
C, the fans should run at full speed.
Module cooling air enters at the rear of the rack-mounted VXI-1200
mainframe and is filtered as it is drawn through the fan chamber.
The incoming air is forced into a pressurized plenum below the VXI
modules. The high pressure in the plenum forces the air through a
metered plate into the P2 connector side of the VXI modules. The air
passing over components in the modules absorbs heat and exits at the
P1 side of the modules.
The VXI-1200 mainframe exhausts module cooling air at the top
(bench-top configuration) or left side (rack-mount configuration) of the
mainframe.
Cooling the Power Supply
The power supply assembly contains a speed-controlled fan for its own
internal cooling. Filtered air enters through the rear of the mainframe
and exits at the top (bench-top) or side (rack-mount) after passing
through the power supply.
