NI PXIE-8840

Working Principle

1. Intel quad-core processor with four independent execution cores enables parallel multi-task real-time processing without core resource contention
2. PCI Express Gen3 x8 PXIe backplane link delivers 8 GB/s full-duplex bandwidth for simultaneous multi-module streaming data transfer
3. Large-capacity onboard DDR4 memory provides deep data buffering for multi-megahertz sampling rate continuous signal capture
4. Isolated dual Gigabit Ethernet controllers separate industrial control network and measurement data transmission to eliminate network latency interference
5. Multi-stage hardware watchdog circuit monitors each CPU core independently; triggers graded fault recovery actions for single core or full system stall
6. Extended temperature industrial SSD with power-loss protection circuitry prevents measurement data corruption during unexpected power cut-off

Complete Technical Specifications

• CPU: Intel Quad-Core i7 industrial embedded processor, maximum boost clock 3.7 GHz
• Onboard RAM: 8 GB wide-temperature DDR4 industrial memory (expandable to 16 GB via user upgrade)
• Internal Storage: 64 GB industrial wide-temperature SSD with power-loss write protection
• PXIe Backplane Link: PCIe Gen3 x8, 8 GB/s bidirectional maximum bandwidth
• Supported Operating Systems: NI LabVIEW Real-Time Linux RT, Windows Embedded Standard 7
• Front Panel Interfaces: Dual isolated Gigabit Ethernet, 6×USB 3.0, RS232/485 serial combo port, 2×DisplayPort multi-monitor output, SDXC storage slot
• Watchdog Hardware: Dual-stage independent core monitoring watchdog, configurable soft fault warning and hard power cycle reset
• Operating Ambient Temperature: 0°C ~ +50°C chassis internal operating range
• Environmental Mechanical Rating: 15g peak shock, 5–1000Hz vibration MIL-STD-810 certified
• Backplane Power Consumption: Maximum 45 W full CPU load power draw

Material & Structural Characteristics

1. Form Factor: Single-slot 3U PXIe standard embedded controller module
2. Main Circuit Board: 12-layer industrial FR4 PCB with low-temperature drift precision components
3. Thermal Dissipation: High-performance heat pipe aluminum fin heat sink with optional auxiliary chassis forced air cooling
4. Storage Device: Shock-resistant industrial SSD with built-in supercapacitor power-loss data protection
5. Front Panel Enclosure: CNC machined aluminum alloy with hard anodized anti-abrasion coating
6. Communication Connectors: Lockable metal-shell Ethernet and USB ports for heavy vibration test environments

Distinct Core Functional Features

1. Four independent CPU cores enable parallel execution of signal acquisition, motion control, network communication and fault diagnosis simultaneously
2. PCIe Gen3 high-bandwidth backplane supports synchronized multi-module high-speed streaming up to multi-GS/s aggregate sampling rates
3. Dual isolated Ethernet ports with galvanic isolation prevent ground loop noise distortion in analog measurement signals
4. Power-loss protected industrial SSD eliminates measurement data corruption during sudden chassis power interruption
5. Multi-stage core watchdog provides graded fault recovery for non-critical software stalls and full system lockup conditions
6. Expandable onboard RAM supports ultra-large continuous waveform data buffer storage for long-duration recording tests
7. Multi-monitor DisplayPort output for simultaneous test interface visualization and real-time data plotting

Target Application Fields

• Automotive powertrain, battery pack HIL high-channel-count real-time simulation systems
• Radar, radio frequency aerospace multi-channel signal capture and analysis test benches
• Semiconductor manufacturing multi-station parallel automated functional test equipment
• Power grid energy storage converter real-time hardware simulation validation platforms
• Large-scale distributed vibration monitoring and modal analysis measurement systems

Chassis Installation Standard Requirements

1. Install PXIe-8840 in leftmost system controller slot of PXIe chassis marked for embedded controller use
2. Allocate minimum two empty adjacent slots for heat sink airflow clearance to avoid thermal throttling
3. Equip chassis with front-to-rear forced cooling fan assembly to maintain internal temperature below 50°C
4. Use shielded CAT6A Ethernet cables for high-speed measurement data network connections
5. Isolate analog signal wiring from controller Ethernet power wiring with minimum 40cm separation distance

Operation & Maintenance Critical Notes

1. Distribute parallel test tasks evenly across four CPU cores in LabVIEW Real-Time to avoid single-core overload latency
2. Enable SSD power-loss protection function before conducting long-duration continuous data logging tests
3. Upgrade DDR4 memory to 16 GB when operating more than 8 high-speed PXIe DAQ modules simultaneously
4. Replace RTC backup lithium battery every 24 months to prevent system timestamp loss during power cycles
5. Conduct quarterly thermal inspection to clear dust accumulation on heat sink fins for sustained CPU performance
6. Avoid operating chassis at ambient temperature above 50°C for continuous 24/7 unattended test operation