PXIe-7858

The PXIe-7858R is a high-performance FPGA-based Multifunction RIO (Reconfigurable I/O) module developed by National Instruments for PXI Express systems.

Combining high-speed analog input, analog output, digital I/O, hardware counters, and a user-programmable Xilinx FPGA, the PXIe-7858R enables deterministic measurement and control that cannot be achieved with conventional DAQ devices.

It is widely used in hardware-in-the-loop (HIL) simulation, semiconductor testing, power electronics, robotics, aerospace, and advanced research laboratories.

Typical applications include:

• Hardware-in-the-loop (HIL)
• FPGA-based signal processing
• Real-time control
• High-speed data acquisition
• Motor control
• Power electronics testing
• Embedded system development
• Semiconductor validation

FPGA-Based Multifunction RIO Architecture

The PXIe-7858R integrates measurement, control, and FPGA processing into one PXI Express module.

Key Specifications

This architecture enables extremely fast hardware-level processing with deterministic timing.

User-Programmable FPGA

The core feature of the PXIe-7858R is its FPGA.

Benefits include:

Deterministic Control

Execute control loops in hardware with microsecond-level latency.

Parallel Processing

Run multiple algorithms simultaneously without CPU bottlenecks.

Custom Digital Logic

Implement proprietary communication protocols and hardware timing.

Hardware Signal Processing

Perform filtering, triggering, FFT preprocessing, and protocol decoding directly inside the FPGA.

Applications include:

• PWM generation
• Encoder processing
• High-speed triggering
• Digital protocol implementation
• Signal conditioning
• Custom DSP algorithms

High-Speed Analog and Digital I/O

The PXIe-7858R combines multiple I/O resources.

Analog Inputs

Acquire sensor signals with high precision.

Analog Outputs

Generate control voltages and custom waveforms.

Digital I/O

Support industrial digital interfaces and timing control.

Hardware Counters

Measure encoder feedback, pulse width, and frequency.

This multifunction architecture minimizes external hardware requirements.

Hardware-in-the-Loop (HIL) Applications

The PXIe-7858R is widely used for HIL simulation.

Typical applications include:

Automotive ECU Testing

Simulate sensors and actuators.

Motor Drive Validation

Execute closed-loop motor control.

Aerospace Systems

Real-time flight control simulation.

Industrial Equipment Testing

Test PLCs and embedded controllers.

The FPGA provides deterministic execution for accurate real-time simulation.

Power Electronics and Motion Control

The PXIe-7858R is commonly deployed in:

Motor Control

PWM generation with encoder feedback.

Inverter Testing

High-speed current and voltage control.

Battery Management Systems

Real-time monitoring and simulation.

Robotics

Low-latency control of servo and motion systems.

Its deterministic hardware timing significantly improves system performance.

Semiconductor and Research Applications

The PXIe-7858R is suitable for advanced research environments.

Applications include:

• Semiconductor device characterization
• Mixed-signal validation
• FPGA algorithm development
• Custom instrumentation
• High-speed sensor interfaces
• Scientific research

Its programmable FPGA allows complete customization for specialized experiments.

Software Integration

The PXIe-7858R supports:

• LabVIEW FPGA
• LabVIEW
• NI-RIO
• VeriStand
• Python
• C/C++

Benefits include:

• Graphical FPGA programming
• Deterministic real-time execution
• Fast hardware deployment
• Seamless PXI integration
• Rapid prototyping

Comparison with Similar NI FPGA Modules

Compared with the USB-7856, the PXIe-7858R provides higher system bandwidth and PXI synchronization. Compared with the PXIe-7976R, it integrates analog and digital I/O, making it ideal for control applications without requiring external adapter modules.

Why Engineers Choose PXIe-7858R

Engineers choose the PXIe-7858R because it offers:

• User-programmable FPGA
• Deterministic real-time control
• High-speed analog and digital I/O
• PXI Express bandwidth
• Hardware-in-the-loop support
• Motor and power electronics control
• Flexible custom hardware development
• Excellent LabVIEW FPGA integration

It is one of NI’s most versatile FPGA-based Multifunction RIO modules for demanding real-time applications.

Conclusion

The PXIe-7858R is a powerful FPGA-based multifunction I/O platform that combines high-speed measurement, deterministic control, and customizable hardware processing within a PXI Express environment.

Its combination of:

• User-programmable Xilinx FPGA
• High-speed analog input and output
• 96 digital I/O lines
• Deterministic hardware timing
• PXI Express architecture
• NI-RIO and LabVIEW FPGA support
• Flexible real-time control

makes it an outstanding solution for HIL simulation, industrial automation, robotics, motor control, semiconductor validation, and advanced scientific research.