This section describes basic maintenance procedures you can perform on the PXIe-1092 chassis.

Caution Disconnect the power cable prior to servicing your PXIe-1092 chassis.

Service Interval

Clean dust from the chassis exterior (and interior) as needed, based on the operating environment. Periodic cleaning increases reliability.

Preparation

The information in this section is designed for use by qualified service personnel. Read the Read Me First: Safety and Electromagnetic Compatibility document included with your kit before attempting any procedures in this section.

Note Many components within the chassis are susceptible to static discharge damage. Service the chassis only in a static-free environment. Observe standard handling precautions for static-sensitive devices while servicing the chassis. Always wear a grounded wrist strap or equivalent while servicing the chassis.

Cleaning

Cleaning procedures consist of exterior and interior cleaning of the chassis and cleaning the fan filters. Refer to your module's user documentation for information about cleaning individual CompactPCI or PXI Express modules.

Caution Always disconnect the power cable prior to servicing the chassis.

Interior Cleaning

Use a dry, low-velocity stream of air to clean the interior of the chassis. Use a soft-bristle brush for cleaning around components.

Exterior Cleaning

Clean the exterior surfaces of the chassis with a dry, lint-free cloth or a soft-bristle brush. If any dirt remains, wipe with a cloth moistened in a mild soap solution. Remove any soap residue by wiping with a cloth moistened with clear water. Do not use abrasive compounds on any part of the chassis.

Caution Avoid getting moisture inside the chassis during exterior cleaning, especially through the top vents. Use just enough moisture to dampen the cloth.

Do not wash the front- or rear-panel connectors or switches. Cover these components while cleaning the chassis.

Do not use harsh chemical cleaning agents; they may damage the chassis. Avoid chemicals that contain benzene, toluene, xylene, acetone, or similar solvents.

Maintaining Forced-Air Cooling

Inadequate air circulation can cause the temperature within a PXI chassis to rise above the maximum recommended operating temperature for your PXI/PXI Express module. Overheating can cause a thermal shutdown or damage to the PXI/PXI Express module.

Ensure the ambient temperature of your PXI system is within the specifications for all of the system components. Ensure the ambient temperature provides adequate cooling clearances for your chassis to achieve the required airflow through the chassis.

Note The ambient temperature of a PXI system is defined as the temperature at the chassis fan inlet (air intake).

Follow these guidelines to maintain optimal forced-air cooling for PXI and PXI Express modules in the chassis:

  • NI highly recommends installing slot blockers in unused slots to maximize airflow in the slots populated with instrumentation.
  • Install filler panels over slot blockers and unused slots.
    Missing filler panels disrupt the necessary air circulation in the chassis.
  • Install your chassis so cooling clearances meet the specifications stated in the specifications.
    Allow space around the chassis fan intake and exhaust vents; if you remove the chassis feet, allow for adequate clearance below the chassis. Blocked fan vents impede the airflow needed for cooling.
  • For rackmount PXI deployments, follow these guidelines:
    • Place high-power units within the rack above the PXI system where possible.
    • Use racks with open sides and/or rear panels.
    • Use fan trays within the rack, and at the top and bottom of the rack, to increase overall airflow and reduce ambient temperatures within the rack.
    • Use other methods that reduce ambient temperature within the rack.
  • If your chassis includes fan filters, clean them at least every six months.
    Depending on the amount of chassis use and the ambient dust levels, filters may require more frequent cleaning. If regular maintenance of dirty or clogged filters is not possible, you can remove foam filters to maintain adequate cooling.
  • Set all chassis fans to high unless directed otherwise by the PXI or PXI Express module documentation; do not disable the fan(s).
  • Ensure the ambient temperature does not exceed the rated ambient temperature specification.
    Refer to the chassis temperature LED, if available, or use a temperature probe to verify temperature.

Installing PXI Slot Blockers

PXI slot blockers improve system cooling in PXI chassis by rerouting airflow from empty slots to slots containing PXI modules.

NI recommends using PXI slot blockers with standard or EMC filler panels to improve cooling performance for all PXI chassis.

Notice NI highly recommends installing PXI slot blockers if your PXI chassis features rear fans.

You can order PXI slot blockers (NI part number 199198-01) on ni.com.

To install PXI slot blockers in your PXI chassis, complete the following steps.

  1. Install a PXI slot blocker in each empty slot of your PXI chassis.
    Figure 25. Slot Blocker Installation


  2. Install PXI filler panels over each slot containing a PXI slot blocker.

Installing PXI Filler Panels

To ensure proper cooling, install standard filler panels or EMC filler panels over each empty slot of a PXI chassis.

Filler panels improve the cooling performance of the system. EMC filler panels contain additional gaskets to control EMC emissions from the chassis. Some PXI/PXI Express modules require EMC filler panels to meet specification conditions.

Note To ensure adequate cooling of modules, you must install filler panels over all chassis slots. To ensure optimal cooling performance, NI recommends using slot blockers with filler panels.

For more information about PXI filler panels, visit ni.com/r/emcpanels.

  1. Remove the captive screw covers, if present, from the filler panel.
  2. Secure the captive mounting screws to the chassis.
    Note Do not overtighten the screws (2.5 in. · lb maximum).

    When installing EMC filler panels, ensure that the EMC gasket is on the right side as shown in the following figure.

    Figure 26. EMC Filler Panel Installation


    1. Captive screw covers
    2. Captive mounting screws
    3. EMC gasket

    When installing standard filler panels, install as shown in the following figure.

    Figure 27. Standard Filler Panel Installation


Replacing the Power Supply

This section describes how to remove, configure, and install the AC power supply in the PXIe-1092 chassis.

Caution Disconnect the power cable prior to replacing the power supply.

Before connecting the power supply shuttle to a power source, read this section and the Read Me First: Safety and Electromagnetic Compatibility document included with the kit.

Removal

The PXIe-1092 power supply is a replacement part for the PXIe-1092 chassis. Before attempting to replace the power supply, verify there is adequate clearance behind the chassis. Disconnect the power cable from the power supply on the back of the chassis. Identify the two mounting screws for the PXIe-1092 that attach the power supply to the chassis. Refer to the Rear View of the PXIe-1092 Chassis figure, for the screw locations. Using a Phillips screwdriver, remove the screws. Pull on the two rear handles of the power supply to remove it from the back of the chassis.



  1. Power Supply
  2. Power Supply Screws (2x)

Installation

Note The power supply should be disconnected from AC power for at least 30 seconds before it is installed in the chassis.

Ensure that there is no visible damage to the new power supply. Verify that the housing and connector on the new power supply assembly have no foreign material inside. Install the new power supply into the chassis in the reverse order of removal. Replace and tighten two #6-32 screws with a Phillips screwdriver. Connect the AC inlet power cable.

To meet the Shock and Vibration specifications listed in the PXIe-1092 Specifications, tighten screws to 1.3 N · m (11.5 in · lb) of torque.

Installing Replacement Fan Assemblies

This section describes how to remove and install fan assemblies in the PXIe-1092 chassis.
Caution Disconnect the power cable and wait at least 30 seconds prior to replacing fan assemblies.

Replacing the PXI Module Fan Assembly

Before attempting to replace the rear module fan assembly, 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 supply's internal power to dissipate.

Removing the PXI Module Fan Assembly

Follow these steps to remove the fan assembly:
  1. Using a Phillips screwdriver, remove the six #6-32 mounting screws and #8-32 ground screw that attach the fan panel to the chassis.
  2. Remove rear chassis feet.
  3. With the internal fan harness still connected, carefully pull and rotate fan assembly from rear cavity of chassis. Use caution when removing the fan assembly to avoid damaging the fan wire harness.
  4. Disconnect fan harness from the internal chassis receptacle as shown in the following figure.

Installing the PXI Module Fan Assembly

Follow these steps to install a new fan assembly:
  1. Angle the fan assembly to install the fan harness plug into the internal chassis receptacle. Use care to avoid damaging the fan harness or receptacle.
  2. Connect the internal fan harness and install fan assembly into rear cavity of chassis as shown in the following figure. Use caution when installing the fan panel assembly to avoid pinching or damaging the wire harness.
  3. Replace chassis feet.
  4. Using a Phillips screwdriver, tighten the six #6-32 mounting screws and #8-32 ground screw into the rear of the chassis. To meet Shock and Vibration specifications listed in the PXIe-1092 Specifications, tighten screws to 1.3 N · m (11.5 in · lb) of torque.
Figure 28. Replacing Rear Fan Module


  1. Fan Harness Plug
  2. PXI Express Chassis
  3. PXI Module Fan Assembly
  4. Rear Chassis Feet (2x)
  5. Mounting Screws (6x)
Figure 29. Internal Fan Harness


  1. Fan Receptacle
  2. Fan Harness Plug

Replacing the Side Fan Assembly

Before attempting to replace the side fan assembly, verify that there is adequate clearance to the side of the chassis. Disconnect the power cable from the power supply on the back of the chassis. Wait at least 30 seconds for the power supply's internal power to dissipate.

Removing the Side Fan Assembly

Complete the following steps to remove the side fan assembly:
  1. Using a Phillips screwdriver, remove the four mounting screws that attach the side fan cover.
  2. Remove side fan cover from the chassis.
  3. Using a Phillips screwdriver, remove the two mounting screws that hold the side fan assembly onto the chassis.
  4. Locate side fan assembly harness in internal chassis cavity and disconnect the fan from the chassis receptacle. Use caution when removing the fan assembly to avoid damaging the internal wire harness.
  5. Pull side fan assembly straight from chassis and remove.

Installing the Side Fan Assembly

Complete the following steps to install a new side fan assembly
  1. Plug side fan assembly plug into internal chassis fan receptacle.
  2. Set side fan assembly into chassis side fan cavity. Use caution when placing wire harness into chassis to avoid damaging the internal or fan wire harness.
  3. Using a Phillips screwdriver, hand tighten two side assembly mounting screws. Use the side fan cutout to pull clear extra cable from chassis side panels to prevent pinching.
  4. Place all extra cable into chassis side fan cavity.
  5. Using a Phillips screwdriver, tighten the four side fan cover mounting screws to the chassis. To meet Shock and Vibration specifications listed in the PXIe-1092 Specifications, tighten the two fan bracket mounting screws to 0.56 N · m (5.0 in · lb) and the four fan cover mounting screws to 0.80 N · m (6.7 in · lb) of torque.
Figure 30. Replacing Side Fan Assembly


  1. Chassis Side Fan Cavity
  2. Side Fan Assembly
  3. Side Fan Bracket Mounting Screws (2x)
  4. Side Fan Cover
  5. Side Fan Cover Mounting Screws (4x)