PXIe-4138 National Instruments

PXIe-4138 National Instruments I / O module

Product  Description：

National Instruments (NI) I/O modules, particularly those designed for the CompactRIO, CompactDAQ, and PXI platforms (such as the C Series modules), are high-performance hardware components that interface physical sensors and actuators with a centralized controller or computer. These modules perform high-fidelity signal conditioning, analog-to-digital conversion, and digital signal processing. They are engineered to deliver laboratory-grade measurement accuracy directly into rugged, industrial testing and monitoring environments.

Product Parameters

The technical configuration of National Instruments I/O modules focuses on measurement precision, sampling rates, and synchronization:

• Channel Density: Available in varied configurations depending on signal type, typically offering 4, 8, 16, or 32 channels per module.

• Signal Compatibility: Supports a massive array of inputs including thermocouple, RTD, strain gage, load cell, high-voltage AC/DC, and specialized digital waveforms.

• Analog-to-Digital Resolution: High-resolution architectures utilizing 16-bit, 24-bit, or even 32-bit SAR and Delta-Sigma converters for extreme signal clarity.

• Sampling Rate Capacity: Varies by series, ranging from power-frequency logging at 100 samples per second to high-speed transient capture exceeding 1 MS/s per channel.

• Simultaneous Sampling: Many models feature independent analog-to-digital converters per channel, eliminating phase delays between channels during high-speed data acquisition.

• Isolation Barrier Strength: Equipped with robust channel-to-channel or channel-to-earth ground isolation, often rated for 250V RMS continuous or up to 2300V RMS transient breakdown.

Product Advantages

National Instruments I/O modules are distinct in the automation and testing market due to their unique software-defined architecture:

• Advanced Software-Defined Flexibility: Fully integrated with NI LabVIEW, MATLAB, and modern programming APIs (C++, Python), allowing users to reprogram the hardware behavior, filtering, and timing on the fly.

• Built-in Signal Conditioning: Eliminates the need for external accessories by integrating excitation voltages, bridge completion, and anti-aliasing filters directly into the compact module housing.

• Microsecond-Level Synchronization: When inserted into an NI chassis, modules share a common backplane clock, enabling sub-microsecond synchronization between disparate signal types like temperature and vibration.

• Ruggedized Industrial Form Factor: C Series modules feature solid-state designs with no moving parts, rated to withstand up to 50g of operational shock and temperatures ranging from -40°C to 70°C.

• Strict Calibration Standards: Shipped with traceable NIST calibration certificates, ensuring that the measurement accuracy meets global laboratory and research specifications.

Product Applications

These modules are the standard choice for advanced data acquisition, structural health testing, and automated research:

• Automotive and Aerospace Testing: Capturing real-time telemetry from wind tunnels, engine dynamometers, and structural stress sensors during hardware-in-the-loop (HIL) simulations.

• Machine Condition Monitoring: Logging continuous high-speed acoustic and vibration data from industrial turbines and bearings to predict mechanical failures.

• Structural Health Monitoring: Measuring strain, displacement, and seismic acceleration across bridges, skyscrapers, and wind turbines.

• Academic and Scientific Research: Providing the high-precision analog data inputs required for physics experiments, material science analysis, and green energy development.

• Factory Automated Test Equipment: Serving as the core measurement engine in production-line test benches for electronics, medical devices, and consumer goods.

Important Precautions

To preserve the extreme measurement accuracy of NI modules and prevent physical damage, follow these guidelines:

• Shielding and Signal Integrity: Always use high-quality twisted, shielded cables for low-voltage analog inputs like thermocouples or strain gages. Terminate the shield properly at the chassis ground to prevent ambient electromagnetic noise from skewing data.

• Cold-Junction Compensation Awareness: For thermocouple modules, ensure the terminal block is not placed near external heat sources like power supplies, as thermal gradients will disrupt the internal cold-junction compensation accuracy.

• Strict Power Sequencing: Always follow the recommended insertion guidelines for the specific chassis generation. While many C Series modules support hot-swapping, executing it during active software execution can result in data corruption or timeout errors.

• Unused Input Grounding: For high-impedance multiplexed analog modules, tie unused input channels to the system common ground to prevent floating voltages from ghosting onto active channels.

• Calibration Lifecycle Management: To maintain compliance with international quality standards, modules must be returned to an authorized facility for recalibration every one to two years depending on the model specification.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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