PXI-8175 National Instruments

PXI-8175 National Instruments analog module

Product  Description：

National Instruments (NI) analog modules, primarily within the C Series, PXI, and SCXI architectures, are high-performance data acquisition instruments designed to sample or generate continuous physical signals. These modules bridge the gap between physical phenomena and digital processing environments. Analog input modules utilize high-resolution analog-to-digital converters to measure real-world waveforms like voltage, current, temperature, and strain. Analog output modules perform the inverse, generating precise voltage or current waveforms to drive actuators, control valves, or simulate physical sensors.

Product Parameters

The technical baseline of National Instruments analog modules is defined by precision, sampling speed, and signal conditioning capabilities:

• Channel Density: Available in configurations ranging from 2-channel and 4-channel high-speed modules to 16-channel and 32-channel high-density modules.

• Resolution Architecture: Built with high-resolution converters, typically utilizing 16-bit, 24-bit, or even 28-bit Delta-Sigma or SAR architectures to ensure microvolt-level accuracy.

• Sampling Rate: Supports a wide performance spectrum, from low-speed, highly filtered thermal sampling at 10 samples per second to ultra-high-speed transient capture exceeding 2 million samples per second per channel.

• Input and Output Ranges: Configurable for various standard signal spans including ±10V, ±5V, 0V to 10V, as well as industrial current loops like 0-20mA and 4-20mA.

• Signal Conditioning Integration: Many variants feature onboard signal conditioning, including built-in excitation currents for RTDs and strain gages, cold-junction compensation for thermocouples, and IEPE power for accelerometers.

• Isolation Ratings: Designed with advanced safety barriers, offering channel-to-channel or channel-to-earth galvanic isolation typically rated up to 250V RMS continuous or 2300V transient breakdown protection.

Product Advantages

National Instruments analog modules stand out in research, validation, and industrial testing environments due to their flexible, software-defined nature:

• Seamless Software Integration: Native compatibility with NI LabVIEW, LabWindows/CVI, and Measurement Studio allows engineers to configure hardware, log data, and analyze signals with minimal development time.

• Hardware-Timed Synchronization: When slotted into a PXI chassis or CompactDAQ backplane, these modules utilize shared timing and triggering lines to synchronize multiple analog channels within nanoseconds of each other.

• High Measurement Fidelity: Advanced anti-aliasing filters and low-noise front-end electronics ensure clean signal acquisition even when operating near heavy industrial machinery or high-frequency transmitters.

• Modular and Scalable Form Factors: Users can mix and match analog input, analog output, digital, and communication modules within a single chassis, making it easy to scale systems as testing requirements evolve.

• Ruggedized Industrial Enclosures: C Series modules feature encapsulated, compact housings that resist mechanical shock, high vibration, and broad operating temperatures, making them suitable for field deployment.

Product Applications

These analog modules are utilized across diverse industries for advanced testing, monitoring, and control:

• Automotive and Aerospace Testing: Capturing high-speed vibration data from accelerometers during crash tests, or logging hundreds of thermocouple channels during aircraft thermal vacuum chamber testing.

• Structural Health Monitoring: Measuring micro-strain deformations on bridges, wind turbine blades, and building foundations using strain gage analog input modules.

• Sound and Vibration Analysis: Acquiring audio and acoustic emissions from microphones or machinery components to perform fast Fourier transform (FFT) noise diagnostics.

• Hardware-in-the-Loop (HIL) Simulation: Utilizing high-speed analog output modules to simulate sensor behaviors, allowing engineers to test electronic control units (ECUs) safely in a laboratory.

• Automated Production Inspection: Serving as the measurement backbone for automated test equipment (ATE) lines checking component voltage thresholds and power supply limits.

Important Precautions

To preserve calibration accuracy and safeguard the module from electrical damage, the following operational instructions must be observed:

• Overvoltage Protection Constraints: Never exceed the absolute maximum voltage rating stamped on the module terminal block. Applying high voltage to an un-isolated analog input will permanently destroy the input multiplexer or operational amplifiers.

• Ground Loop Avoidance: When measuring non-isolated differential signals, ensure that the common-mode voltage remains within the module's allowable limit. Improper grounding between the sensor and the module can introduce severe measurement noise or ground loops.

• Shielding and Cable Routing: Always use shielded twisted-pair (STP) cabling for low-level analog signals such as microvolt thermocouple lines. Route these cables far away from high-current AC motor leads to prevent inductive noise injection.

• Unused Channel Configuration: For multi-channel floating inputs, tie unused channels to the system ground or disable them in the software task manager to prevent ghosting or crosstalk from affecting active adjacent channels.

• Regular Calibration Intervals: To maintain the specified absolute accuracy, analog modules must be calibrated regularly (typically every one to two years) to compensate for component aging and thermal drift.

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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