The NI PXI-7831R is a multifunction intelligent DAQ module equipped with a user-programmable Virtex-II 1M Gate FPGA for custom onboard processing, precise timing, and flexible I/O configuration. It delivers real-time signal processing and hardware-timed decision making at 40 MHz, supporting advanced data acquisition, high-speed control loops, and user-defined communication protocols.
Technical Specifications
FPGA & Processing
• Virtex-II 1M Gate FPGA configurable via LabVIEW FPGA Module
• Hardware-timed decision making: 40 MHz
• User-defined processing, system timing, triggering, custom counter/timers, PWM channels, and communication bus implementation
Analog Input (8 Channels)
• Resolution: 16-bit
• Sampling rate: Up to 200 kS/s per channel; up to 750 kHz simultaneous across all channels
• Input modes: Software-selectable DIFF, RSE, NRSE
• Input ranges: ±20.0 V, ±2.0 V, ±0.2 V
• Offset and gain calibration via onboard DACs
Analog Output (8 Channels)
• Resolution: 16-bit
• Update rate: Up to 1 MHz across all channels
• Update time: 1.0 µs at 1 MS/s
• Output ranges: ±20.0 V, ±2.0 V, ±0.2 V
Digital I/O
• 96 bidirectional lines at 3.3 V TTL levels
• Data transfer rate: Up to 40 MHz
• Configurable as counter/timers, PWM channels, or custom communication buses
Timing & Synchronization
• FPGA-based system timing controller with user-defined triggering
• RTSI bus support for multi-device synchronization
– Key Features
• Dual MIO and DIO connectors for comprehensive signal routing
• MITE bus interface chip for PCI/PXI I/O integration
• PXI J2 connector support for chassis synchronization
• Configurable power-on states for digital I/O via custom VI
• Dimensions: 6.3 × 2.9 in.; Weight: 152 g
– Typical Applications
Custom hardware signal conditioning, field-programmable timing and triggering, prototype control system implementation, real-time embedded processing, and multiprotocol communication interface development.
– Compatibility & Integration
Requires NI-RIO driver software 1.1 or later, LabVIEW 7.0+, LabVIEW FPGA Module 1.0+, and LabVIEW Real-Time Module 7.0+. Windows XP and Windows 7 compatible. Note: Product support was discontinued in May 2017; latest validated configuration is LabVIEW 2016 with NI-R Series RIO 16.5.
