NI PXIe-1084 784058-01 | 18-Slot PXI Express Chassis – Specifications & Integration Guide

Description

System Architecture & Operational Principle

Physical Structure

Backplane & Connectivity

• High-Speed Data Transfer: Up to 4 GB/s system bandwidth via PCIe lanes, ensuring low-latency communication between modules (e.g., data acquisition modules sending samples to a controller).
• Timing & Synchronization: Integrated timing buses (e.g., PXI_CLK10) for precise synchronization of modules, critical for applications like radar testing or semiconductor wafer inspection.
• Power Distribution: Delivers 58 W of cooling power per slot (total 1044 W for 18 slots) to support high-power modules (e.g., power amplifiers, dense data acquisition cards).

Operational Workflow

1. Power Up: The chassis receives 100–240 VAC power from the mains, which is distributed to the backplane and modules.
2. Module Initialization: When a PXI module (e.g., PXIe-6363 data acquisition module) is inserted into a slot, the backplane detects it and initializes the module via the PCIe bus.
3. Data Flow: Modules communicate with each other and the controller (e.g., PXIe-8880) via the backplane. For example, a signal generator module (PXIe-5413) sends a waveform to a data acquisition module (PXIe-6363) through the backplane, which the controller processes and stores.
4. Cooling: Three 210 CFM fans and one 70 CFM fan circulate air through the chassis to dissipate heat from modules, maintaining optimal operating temperatures.

Advantages Over Traditional Chassis

• Modularity: Users can mix and match PXI modules (e.g., data acquisition, signal generation, communication) to build custom systems, reducing the need for multiple specialized instruments.
• Scalability: The 18-slot design allows expansion as testing needs grow (e.g., adding more data acquisition channels for a larger test setup).
• Ruggedness: The chassis is designed to withstand industrial environments (e.g., vibration, temperature fluctuations), making it suitable for factory floors or remote test sites.

Core Technical Specifications

Attribute​	Specification​
Slots​	18 total (17 hybrid slots, 1 system slot)
Backplane Bandwidth​	4 GB/s (maximum system bandwidth)
Per-Slot Cooling Capacity​	58 W
Power Supply​	100–240 VAC (50/60 Hz), 10 A max
Operating Temperature​	-40°C to +55°C (-40°F to 131°F)
Storage Temperature​	-40°C to +70°C (-40°F to 158°F)
Humidity Tolerance​	5–95% non-condensing
Dimensions (H×W×D)​	~482.6 mm × 177.8 mm × 393.7 mm (19 in × 7 in × 15.5 in)
Weight​	~7.89 kg (17.4 lbs)
Certifications​	CE, UL, CSA, RoHS
Fan Configuration​	3 × 210 CFM fans + 1 × 70 CFM fan (variable speed)

LAM 685-064724-002

Customer Value & Operational Benefits

Field Engineer’s Notes (From the Trenches)

When installing the PXIe-1084, always use a surge protector—the chassis’s power supply is sensitive to voltage spikes. I once saw a site where a lightning strike fried the power supply, taking the entire test system offline. A $50 surge protector saved $2,000 in repairs.

Another gotcha: check the fan filters monthly—dust buildup can reduce cooling efficiency, leading to module overheating. A semiconductor fab using the PXIe-1084 reduced module failures by 30% after implementing a monthly filter cleaning schedule.

If the chassis’s “OVERHEAT” LED illuminates, check the fan operation—one of the fans may have failed. Use a multimeter to test the fan’s voltage (should be 12V DC) and replace it if necessary.

Real-World Applications

• Aerospace & Defense: Radar Transmitter Testing​
  A defense contractor uses the PXIe-1084 to test radar transmitters. The chassis houses a PXIe-5668 vector signal analyzer (VSA) for measuring transmitter output and a PXIe-5413 signal generator for generating test signals. The high-speed backplane (4 GB/s) enables real-time analysis of radar pulses, reducing test time by 40%.
• Automotive: ECU Functional Testing​
  An automotive manufacturer uses the PXIe-1084 to test engine control units (ECUs). The chassis contains 8 PXIe-6363 data acquisition modules (16 channels each) for monitoring ECU inputs/outputs and a PXIe-8880 controller for running test scripts. The 18-slot design allows testing 8 ECUs simultaneously, increasing throughput by 500%.
• Semiconductor: Wafer Inspection​
  A semiconductor fab uses the PXIe-1084 to inspect silicon wafers. The chassis houses a PXIe-5922 digitizer (24-bit resolution) for capturing wafer images and a PXIe-6733 analog output module for controlling the inspection system. The precise synchronization (via PXI_CLK10) ensures accurate image capture, reducing false positives by 25%.

  

  LAM 685-064724-002

High-Frequency Troubleshooting FAQ

• Fan Operation: Ensure all fans are running (listen for airflow).
• Airflow: Make sure the chassis is not blocked (leave 6 inches of clearance on all sides).
• Ambient Temperature: Verify the room temperature is below 55°C.

1. Power Down: Turn off the chassis and disconnect the power cord.
2. Remove the Chassis Cover: Unscrew the 4 screws on the back of the chassis.
3. Locate the Faulty Fan: Identify the fan that is not spinning (use a flashlight).
4. Replace the Fan: Unscrew the 2 screws holding the fan in place and disconnect the power cable. Install the new fan and tighten the screws.
5. Reassemble: Put the chassis cover back on and power up the system.

1. Module Compatibility: Ensure the module is compatible with the PXIe-1084 (check the module’s datasheet).
2. Slot Type: Insert the module into a hybrid slot (not the system slot).
3. Backplane Connection: Make sure the module is fully seated in the slot (you should hear a click).

Commercial Availability & Pricing