NI9215 National Instruments

NI9215 National Instruments Serial Port Converter

Brand：National Instruments Model number：NI9215

Country of origin: United States Product weight：0.12kg

HS code：8517623990

Product Details：

Product Dimensions：

The NI-9215 features four channels of analog input with a BNC or screw-terminal interface. Unlike multiplexed modules where channels share a single Analog-to-Digital Converter (ADC), the NI-9215 incorporates an independent ADC for each of its four channels. This architecture ensures that data from all channels is captured at the exact same moment, eliminating phase shifts between signals. It is a bus-powered module that inherits the ruggedness and portability characteristic of the NI C Series, allowing it to operate in harsh industrial environments or in laboratory settings with equal reliability.

Product Parameters

The NI-9215 provides high-precision data acquisition with the following technical specifications. It features a 16-bit resolution for high-fidelity signal conversion. The input range is a standard differential voltage of $\pm10 \text{ V}$ . Each of the four channels can sample at a maximum rate of $100 \text{ kS/s}$ (kilo-samples per second) per channel, resulting in an aggregate sampling rate of $400 \text{ kS/s}$ across the entire module. The module offers $250 \text{ Vrms}$ channel-to-earth ground isolation, which provides safety and noise rejection. For timing and synchronization, it supports an internal master timebase and can be synchronized with other C Series modules within the same chassis.

Product Advantages

One of the primary advantages of the NI-9215 is its simultaneous sampling capability. By capturing all four inputs at once, it is ideal for applications where phase relationships between signals are critical, such as vibration analysis or power quality monitoring. The 16-bit resolution ensures that even small fluctuations in the $\pm10 \text{ V}$ range are accurately recorded. Furthermore, its integration into the NI ecosystem allows users to utilize NI-DAQmx software for rapid configuration and LabVIEW for complex data processing. The module is also hot-swappable, meaning it can be installed or removed from a chassis without powering down the entire system, significantly reducing downtime during maintenance or reconfiguration.

Important Considerations and Precautions

When using the NI-9215, it is important to observe several precautions to ensure data accuracy and hardware longevity. First, ensure that the input voltage does not exceed the rated $\pm10 \text{ V}$ range, as overvoltage conditions can lead to signal clipping or hardware damage. Users should also be mindful of the common-mode voltage limits; while the module has isolation from the ground, the difference between inputs must remain within specified tolerances. Because this module is available in different connector types (BNC vs. screw terminal), verify that the cabling used is shielded to prevent electromagnetic interference (EMI) from degrading the high-speed signals. Finally, ensure that the chassis (CompactDAQ or CompactRIO) has the latest drivers installed to support the specific revision of the NI-9215 module being used.

Product Applications

The NI-9215 is widely deployed across various industries due to its speed and synchronization features. In the automotive and aerospace sectors, it is used for structural health monitoring and impact testing where high-speed transients must be captured simultaneously across multiple sensors. It is frequently used in electrical engineering for power factor analysis and monitoring phase-shifted waveforms in three-phase power systems. Additionally, in mechanical engineering, it serves as an excellent tool for noise, vibration, and harshness (NVH) testing, where engineers must correlate acoustic data with mechanical vibrations in real time.

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