PXIe-4330

The NI PXIe-4330 is a high-accuracy, 8-channel simultaneous bridge input module part of the SC Express family. Engineered specifically for strain, load, and pressure measurements, it combines high-resolution data acquisition with integrated signal conditioning in a single PXI Express slot. The PXIe-4330 is the industry-standard choice for engineers who prioritize absolute measurement accuracy and long-term stability in structural test cells and laboratory environments.

1. High-Resolution 24-Bit Delta-Sigma Architecture

The PXIe-4330 is built around a 24-bit Delta-Sigma ADC per channel, providing exceptional dynamic range and noise rejection. With a simultaneous sampling rate of up to 25.6 kS/s per channel, it strikes an ideal balance between high-resolution static measurements and medium-speed dynamic analysis. The simultaneous sampling architecture eliminates inter-channel phase delays, which is paramount when correlating data across multiple strain gauge points on a single mechanical structure.

2. Integrated Bridge Completion and Excitation

To reduce system complexity and external “noise-coupling” wiring, the PXIe-4330 provides comprehensive onboard signal conditioning:

• Flexible Bridge Support: Native support for Full, Half, and Quarter-bridge (120 Ω, 350 Ω, and 1 kΩ) configurations.

• Programmable Excitation: Independent, per-channel programmable voltage excitation ranging from 0.625 V to 10 V.

• Remote Sensing: Actively compensates for voltage drops across long lead wires, ensuring the sensor receives the exact intended excitation for maximum measurement integrity.

3. Advanced Hardware-Based Calibration Features

Measurement reliability is guaranteed through several hardware-integrated verification tools:

• Internal Shunt Calibration: Each channel includes programmable shunt resistors, allowing engineers to perform gain verification and software scaling checks without physical load application.

• TEDS (Transducer Electronic Data Sheet) Support: The module automatically detects and configures sensors according to their TEDS digital records, minimizing manual entry errors and streamlining large-scale system deployments.

• Offset Nulling: Hardware-level zeroing of initial bridge offsets ensures the full dynamic range of the ADC is available for the actual test data.

4. Robust Filtering and Signal Integrity

Each channel features a digital anti-aliasing filter that automatically tracks the sampling rate. Combined with the high common-mode rejection ratio (CMRR) of the analog front-end, the PXIe-4330 excels at extracting clean micro-strain signals even in electrically harsh environments, such as those near high-power motors or industrial inverters.

5. PXI Express Scalability and NI-DAQmx Integration

The PXIe-4330 leverages the PXI Express backplane for sub-microsecond synchronization between multiple chassis and modules. Driven by the NI-DAQmx framework, it allows for seamless integration into LabVIEW, Python, or C/C++. This ensures that as your project grows from 8 to 800 channels, the system remains synchronized and manageable with minimal software overhead.

6. Primary Application Domains

The PXIe-4330 is optimized for high-fidelity mechanical and structural validation:

• Structural Integrity Testing: Monitoring strain and fatigue in airframes, bridges, and wind turbines.

• Load and Torque Monitoring: High-precision weighing and torque analysis in automotive and industrial test stands.

• Material Research: Accurate stress-strain characterization in specialized tensile testing.

• Pressure Transducer Interfacing: High-stability monitoring of oil, gas, and hydraulic systems.

Summary

The NI PXIe-4330 is a robust, high-precision solution designed for engineers who require reliable, “set-and-forget” bridge measurements. By integrating 24-bit precision, flexible bridge completion, and advanced calibration tools into the PXIe platform, it offers unparalleled data quality. Contact our technical team today for professional technical support and competitive project pricing to ensure your next measurement campaign is a success.