NI PXI-4351 | PXI Digitizer Module with 24-Bit ADC

Description

PXI-4351: Product OverviewThe National Instruments PXI-4351 is a high-precision digitizer module designed for PXI systems, providing exceptional accuracy for temperature, voltage, resistance, and current measurements. This versatile module features a 24-bit sigma-delta analog-to-digital converter and low leakage construction, making it ideal for demanding measurement applications in industrial automation, research, and test environments

.The PXI-4351 supports multiple measurement types including thermocouple temperature measurements, resistance temperature detector (RTD) readings, thermistor measurements, ohm measurements using built-in precision current sources, and current measurements using external shunt resistors. With its 16 differential channels and advanced signal conditioning capabilities, the module can handle complex measurement scenarios with high accuracy and reliability

.Important Note:​ The PXI-4351 is no longer available​ from National Instruments, though it may still be available from third-party suppliers. The module has reached end-of-life (EOL) status from the manufacturer

NI PXI-4351

.PXI-4351: Technical Specifications

• Model Number:​ PXI-4351
• Manufacturer:​ National Instruments
• Product Type:​ High-Precision Digitizer
• Compatible System:​ PXI Platform
• ADC Resolution:​ 24-bit sigma-delta converter
• Input Channels:​ 16 differential channels or 14 thermocouple channels
• Digital I/O:​ 8 programmable TTL-compatible digital I/O lines
• Current Source:​ Built-in 1 mA precision current source for resistance measurements up to 15 kΩ
• Construction:​ Low leakage construction with digital and analog filtering
• Software:​ Plug and Play compatible, fully software-calibrated
• Operating Systems:​ Compatible with broad range of operating systems
• Status:​ End-of-Life (EOL) from manufacturer

Core Features & Customer ValueThe PXI-4351 delivers significant value through its high-precision measurement capabilities​ and versatile input options. The 24-bit sigma-delta ADC​ provides exceptional resolution and accuracy, while the low leakage construction​ ensures minimal signal degradation and excellent noise rejection. The module’s built-in precision current sources​ eliminate the need for external signal conditioning for resistance measurements, simplifying system integration and reducing overall costs

.The software-programmable ground-referencing​ capability allows users to reference floating signals without affecting voltage measurements, providing flexibility in various measurement configurations. The digital and analog filtering capabilities​ further enhance measurement accuracy by reducing noise and improving signal quality

.For system integrators, the PXI-4351 offers seamless integration​ with other PXI modules and compatibility with standard bench-top instruments like DMMs and data loggers, making it a cost-effective solution for high-resolution measurements

NI PXI-4351

.Typical Applications

• Industrial Automation:​ Temperature monitoring in manufacturing processes, process control systems
• Research and Development:​ Laboratory experiments requiring precise temperature and voltage measurements
• Test and Measurement:​ Quality control testing, product validation
• Environmental Monitoring:​ Temperature and voltage monitoring in environmental chambers
• Energy Management:​ Power system monitoring and analysis