Description
Product Overview
The NI NI-9239 is a high-precision 4-channel simultaneous – sampling dynamic signal acquisition module developed by National Instruments (NI), a renowned leader in measurement and automation solutions. As a key component of NI’s CompactDAQ and CompactRIO modular I/O ecosystems, the NI-9239 is engineered to deliver exceptional performance in capturing and analyzing dynamic signals. This module is specifically designed to meet the demanding requirements of applications that involve measuring complex physical phenomena, such as vibration, acoustic, and strain signals, with utmost accuracy and reliability.
The NI NI-9239 enables seamless integration into a wide range of test and measurement systems. It serves as the crucial link between physical transducers, like accelerometers, microphones, and strain gauges, and the host computer for data analysis. Whether in industrial machinery health monitoring, automotive noise, vibration, and harshness (NVH) testing, or advanced scientific research experiments, the NI-9239 ensures that dynamic signals are captured precisely, facilitating in – depth analysis and informed decision – making. Its advanced features and robust construction make it an indispensable tool for professionals seeking accurate and efficient dynamic signal acquisition solutions.
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | NI-9239 |
| Manufacturer | National Instruments (NI) |
| Product Type | Dynamic Signal Acquisition Module |
| Number of Channels | 4 |
| Resolution | 24 bits |
| Sampling Rate | Up to 102.4 kS/s per channel |
| Input Range | ±10 V |
| Anti – aliasing Filter | Built – in 8th – order Butterworth, – 3 dB at 44.1 kHz |
| Frequency Response | 0 to 44.1 kHz |
| Common – Mode Rejection Ratio (CMRR) | >100 dB at 60 Hz |
| Input Impedance | 100 MΩ |
| Isolation | 2500 V rms galvanic isolation |
| Operating Temperature | – 40 °C to 70 °C |
| Physical Dimensions | 100.33 mm x 161.57 mm |
| Compatibility | NI CompactDAQ, NI CompactRIO |
NI NI-9239
Main Features and Advantages
Ultra – High – Resolution and Precision
The NI NI-9239 stands out with its 24 – bit resolution, which offers an unparalleled level of accuracy in dynamic signal acquisition. This high resolution allows the module to detect even the slightest variations in input signals, making it ideal for applications where minute details matter. For instance, in precision machinery vibration analysis, it can precisely measure tiny vibrations that may indicate early signs of wear or malfunction, enabling proactive maintenance and preventing costly breakdowns. The low noise floor and high – resolution conversion ensure that the captured data truly reflects the characteristics of the measured physical phenomena.
Simultaneous Sampling
With its 4 – channel simultaneous – sampling capability, the NI-9239 can capture multiple signals at the exact same time. This feature is crucial in applications where the time – correlation between different signals is essential, such as in multi – point vibration monitoring of a large structure or analyzing the synchronized acoustic signals in a room. By eliminating any time – skew between channels, it provides a more accurate and comprehensive understanding of the dynamic behavior of the measured system, enabling more precise analysis and reliable conclusions.
High – Speed Sampling and Wide Frequency Response
Capable of sampling at up to 102.4 kS/s per channel with a frequency response of 0 to 44.1 kHz, the NI NI-9239 can effectively capture a broad spectrum of dynamic signals. It can keep pace with rapidly changing signals, ensuring that transient events and high – frequency components are accurately recorded. Whether it’s analyzing the high – frequency vibrations of a high – speed rotating shaft or the complex acoustic waves in a noisy environment, this module provides the speed and bandwidth required for in – depth signal analysis.
Robust Isolation and Noise Immunity
Featuring 2500 V rms galvanic isolation, the NI-9239 offers excellent protection against electrical noise, ground loops, and voltage spikes. This isolation enhances the reliability of the acquired data by preventing external electrical interference from corrupting the signal. Additionally, its high Common – Mode Rejection Ratio (CMRR) of >100 dB at 60 Hz effectively rejects common – mode noise, ensuring that only the differential signal of interest is accurately measured. These features make the module highly suitable for use in noisy industrial environments and other challenging measurement scenarios.
NI NI-9239
Application Field
The NI NI-9239 has diverse applications across multiple industries. In the industrial sector, it is extensively used for machinery condition monitoring. By continuously measuring vibration and strain signals from critical machinery components, it helps detect early signs of wear, imbalance, or misalignment. This allows maintenance teams to schedule preventive maintenance, reducing unplanned downtime and extending the lifespan of equipment.
In the automotive industry, the NI-9239 plays a vital role in NVH testing. It can accurately measure the noise, vibration, and harshness generated by vehicle engines, transmissions, and other components. This data is crucial for automotive engineers to optimize vehicle design, improve passenger comfort, and enhance overall vehicle performance.
In aerospace, the module is used for structural health monitoring of aircraft components. By measuring strain and vibration signals, it helps ensure the integrity and safety of structures during flight. In research laboratories, the NI NI-9239 is employed for a wide range of experiments, from studying the dynamic behavior of materials under different loads to analyzing complex acoustic phenomena. Its high – precision and reliable data acquisition capabilities make it an invaluable asset for researchers seeking to gain deeper insights into various physical processes.
Related Products
- NI NI-9234: Similar to the NI-9239, the NI-9234is also a dynamic signal acquisition module with 4 channels and 24 – bit resolution. However, it has a slightly lower sampling rate of up to 51.2 kS/s per channel. It is a suitable option for applications where the lower sampling rate meets the requirements and cost – effectiveness is a priority.
- NI NI-9238: This module offers 8 channels of 24 – bit dynamic signal acquisition, doubling the channel count compared to the NI-9239. It is ideal for applications that require monitoring a larger number of signals simultaneously, such as in large – scale industrial monitoring systems or complex research setups.
- NI NI-9233: A 4 – channel dynamic signal acquisition module with 24 – bit resolution, the NI-9233has a different input range of ±5 V compared to the NI-9239‘s ±10 V. It is suitable for applications where the lower input range is sufficient and provides a more focused solution for specific measurement requirements.
- NI NI-9263: While not a dynamic signal acquisition module like the NI-9239, the NI-9263is an analog output module. It can be used in conjunction with the NI-9239 in closed – loop control systems. The NI-9239 acquires sensor data, and the NI-9263 can generate control signals based on the analysis results to adjust the system’s operation.
- NI NI-9401: A digital I/O module, the NI-9401provides digital signal input and output capabilities. In systems where digital control and monitoring are required along with dynamic signal acquisition, the NI-9401 can work in tandem with the NI-9239 to enable comprehensive system control and data acquisition.
Installation and Maintenance
Pre – installation preparation
Before installing the NI NI-9239, ensure that your NI CompactDAQ or CompactRIO chassis is powered off. Verify the compatibility of the chassis with the NI-9239 module and ensure there is an available slot for installation. Gently insert the NI-9239 module into the appropriate slot, making sure it is firmly seated and properly aligned. After installation, power on the chassis and use the NI – MAX (Measurement & Automation Explorer) software to detect and configure the module. Set parameters such as sampling rate, input range, and anti – aliasing filter settings according to the requirements of your specific application.
Maintenance recommendations
Regularly check the connections between the NI NI-9239 and the transducers to ensure they are secure and free from damage. Avoid excessive bending or pulling of the cables, as this can damage the connectors and disrupt data transmission. Periodically update the firmware of the NI-9239 module using the NI – MAX software to benefit from the latest performance improvements, bug fixes, and new features. If the module experiences any issues, such as inconsistent data acquisition or abnormal signal readings, use the built – in diagnostic tools in the NI – MAX software and refer to the NI product documentation for troubleshooting steps. Additionally, keep the installation environment clean and within the specified temperature range to ensure the long – term reliable operation of the NI-9239 module.
Product Guarantee
We have full confidence in the quality and performance of the NI NI-9239 dynamic signal acquisition module. Each unit undergoes stringent quality control and comprehensive testing procedures to meet the highest industry standards. The NI-9239 comes with a comprehensive warranty that covers any manufacturing defects, providing you with peace of mind. Our dedicated technical support team is always available to assist you with any questions or issues you may encounter. Whether it’s software – related problems, hardware installation, or application – specific inquiries, we are committed to providing prompt and effective solutions. We stand behind the NI NI-9239 and are confident that it will meet your dynamic signal acquisition needs with reliable and long – term performance.
