NI PXIe-8842 787882-01 | Embedded Controller for PXI Express Systems – Specifications & Integration Guide

Description

System Architecture & Operational Principle

Upstream Communication

• Ethernet Ports: For high-speed communication with PCs or networks (supports 10/100/1000/2500BASE-T);
• Thunderbolt 4 Port: For ultra-high-speed data transfer (up to 40 Gbps) with external storage or displays;
• USB Ports: For connecting peripherals (e.g., keyboards, mice, flash drives);
• Serial Port (RS-232): For legacy device communication (e.g., older sensors or controllers).

Downstream Communication

• Module Initialization: Configures each module (e.g., sets the input range of a data acquisition module);
• Data Flow: Coordinates data transfer between modules (e.g., sends a trigger signal from a signal generator to a data acquisition module);
• Synchronization: Ensures all modules operate in lockstep (critical for applications like radar testing or semiconductor wafer inspection).

Operational Advantages

• High Performance: The 6-core Intel Core i5 processor and 8 GB/s system bandwidth enable real-time processing of large datasets (e.g., 1 GB/s data streams from a data acquisition module);
• Flexible Connectivity: Multiple communication ports (Ethernet, Thunderbolt, USB, serial) allow integration with a wide range of external devices;
• Reliable Operation: The embedded design (fanless or low-noise fan) ensures stable performance in harsh industrial environments (e.g., factory floors or test labs);
• Scalability: Supports up to 16 GB of memory and 512 GB of storage, allowing expansion as testing needs grow (e.g., adding more data acquisition channels or larger datasets).

Core Technical Specifications

Attribute​	Specification​
Processor​	Intel Core i5-11500HE (6 cores, 2.6 GHz base frequency, 4.5 GHz max turbo)
Memory​	16 GB DDR4-3200MHz non-ECC SODIMM (max); 512 GB M.2 NVMe SSD storage
System Bandwidth​	8 GB/s (maximum)
Ethernet Ports​	2×10/100/1000/2500BASE-T (Gigabit Ethernet)
Thunderbolt Ports​	1×Thunderbolt 4 (40 Gbps)
USB Ports​	2×USB 3.0 (5 Gbps); 4×USB 2.0 (480 Mbps)
Serial Port​	1×DB-9 (RS-232)
Operating System​	Windows 10 64-bit (default); supports NI Linux Real-Time (optional)
Dimensions (W×H×D)​	~216 mm × 128 mm × 20 mm (8.5 in × 5.0 in × 0.8 in) (3U PXI Express module)
Weight​	~0.45 kg (1.0 lb)
Certifications​	CE, UL, CSA, RoHS

NI PXIe-2593

Customer Value & Operational Benefits

Field Engineer’s Notes (From the Trenches)

When installing the PXIe-8842, always use a grounded power cable—the controller is sensitive to voltage spikes. I once saw a site where a lightning strike fried the controller’s power supply, taking the entire test system offline. A $50 surge protector saved $2,000 in repairs.

Another gotcha: check the memory compatibility—the PXIe-8842 supports DDR4-3200MHz non-ECC SODIMM memory. I’ve fixed countless “memory not detected” issues by replacing incompatible memory modules (e.g., DDR3 or ECC memory).

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

Real-World Applications

• Semiconductor Testing:
  The PXIe-8842 is used to control a PXI-based test system for semiconductor wafers. It manages data acquisition modules (e.g., NI PXIe-5122) that capture signals from the wafer and processes the data in real time to detect defects.
• Automotive ECU Testing:
  In automotive manufacturing, the PXIe-8842 controls a test system for engine control units (ECUs). It sends commands to signal generators (e.g., NI PXIe-5433) to simulate sensor signals and receives data from data acquisition modules (e.g., NI PXIe-4081) to validate ECU performance.
• Aerospace Avionics Testing:
  Aerospace manufacturers use the PXIe-8842 to test avionics systems (e.g., flight control computers). It coordinates multiple modules (e.g., oscilloscopes, signal generators) to simulate flight conditions and validate avionics performance.

  

  NI PXIe-2593

High-Frequency Troubleshooting FAQ

• Fan Operation: Ensure the fan is 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 Memory Slots: Find the memory slots on the controller (usually near the center);
4. Install the Memory: Insert the DDR4-3200MHz non-ECC SODIMM memory module into the slot (align the notch and press down until it clicks);
5. Reassemble: Put the chassis cover back on and power up the system.

1. Module Compatibility: Ensure the module is compatible with the PXIe-8842 (check the module’s datasheet);
2. Slot Type: Insert the module into a PXI Express hybrid slot (not a PXI slot);
3. Backplane Connection: Make sure the module is fully seated in the slot (you should hear a click).

Commercial Availability & Pricing