SECTION 3 - INSTALLATION & OPERATION
Page 3.3
pickering
14-SLOT PXI CHASSIS 40-914
INSTALLING THE CHASSIS
This section includes information on siting the chassis for the most effective cooling, as well as setting the fan
speed and connecting the saftey ground.
Site Considerations
The 40-914 is designed to operate on a bench or in an instrument rack. Determine how you want to use your 40-
914 and follow the appropriate installation instructions.
Apertures in the rear and along both sides of the chassis facilitate power supply and module cooling. As shown
in Figure 2-2, air enters through filters and fan inlets located in the lower rear of the chassis and exits through the
upper sections on both sides and through the rear.
Cooling Considerations
The area above and below the chassis should be kept clear to ensure the inlet and exhaust air paths are not
obstructed. The user should allow at least 0.5 U separation between the top and bottom of the chassis and the
other instruments in the rack.
If the chassis is placed above an instrument that vents hot air from its top cover then a mechanical separator, such
as a tray, should be used to stop the chassis from taking hot air into the chassis
The side and rear air exhausts should be kept clear of obstructions
Ensure that all unused slots in the chassis have filler panels installed, as required by the PXI standard, to ensure
the correct internal air flow.
Ensure the air filter on the bottom of the chassis is correctly installed after cleaning.
Figure 3.1 - Minimum air gap required at the top and
bottom of the 40-914 chassis.
