Replacing the PXI Module Fan Assembly for the PXIe-1081

Follow these steps to replace the rear fan assembly in the PXIe-1081 chassis.

Tools Required:
  • Phillips screwdriver
  • Torque screwdriver
Safety Precautions:
  • Verify that there is adequate clearance behind the chassis.
  • Disconnect the power cable from the power supply on the back of the chassis. Wait at least 30 seconds for the internal power to dissipate.
Complete the following steps to replace the rear fan assembly.
  1. Remove the eight #6-32 mounting screws and the #8-32 grounding screw from the fan panel.
  2. Remove the rear endcaps.
  3. Keep the internal fan harness connected. Carefully pull and rotate the fan assembly from the rear cavity.
  4. Disconnect the fan harness from the internal chassis receptacle.
    Notice Use caution to avoid damaging the fan wire harness.
  5. Angle the new fan assembly to plug the harness into the internal chassis receptacle.
    Notice Use care to avoid damaging the fan harness or receptacle.
  6. Install the fan assembly into the rear cavity of the chassis.
    Notice Avoid pinching or damaging the wire harness.
  7. Replace the rear endcaps.
  8. Tighten the eight #6-32 mounting screws and the #8-32 grounding screw into the rear of the chassis. Tighten screws to 1.3 N·m (11.5 lb·in.) to meet shock and vibration specifications listed in the PXIe-1081 Specifications.
Figure 23. PXIe-1081 Replacing Rear Fan Module

Isometric rear view of the PXIe-1081 chassis with the rear fan module shown in an exploded view. The fan assembly is separated from the chassis, with dashed lines indicating screw paths for installation. Callouts identify the Fan Harness Plug, PXIe-1081 Chassis, PXI Module Fan Assembly, Rear Chassis Feet (2x), and Mounting Screws (8x), Grounding Screw.

  1. Fan harness plug
  2. PXIe-1081 chassis
  3. PXI module fan assembly
  4. Rear endcaps (2x)
  5. Grounding screw
  6. Mounting screws (8x)
Figure 24. PXIe-1081 Internal Fan Harness

Cutaway side view of the PXIe-1081 chassis showing internal components. The visual cutout reveals the Fan Harness Plug and Fan Receptacle, which are clearly separated for visibility. Callouts identify the Fan Receptacle and Fan Harness Plug.

  1. Fan receptacle
  2. Fan harness plug