NI-9234 is a high-precision analog input module produced by National Instruments (NI) in the United States. This module belongs to the C-series dynamic signal acquisition module and has the following main features and specifications:

Number of channels and sampling rate:

NI-9234 has four synchronous sampling analog input channels, each with a sampling rate of up to 51.2 kHz.

Input range and resolution:

The input range is ± 5 V, with 24 bit resolution, capable of accurately measuring signals such as voltage, temperature, and current.

Sensor compatibility:

This module can measure signals from integrated electronic piezoelectric (IEPE) and non IEPE sensors, such as accelerometers, tachometers, and proximity probes.

It is also compatible with smart TEDS sensors.

Signal conditioning and dynamic range:

NI-9234 integrates software optional AC/DC coupling function and features integrated circuit piezoelectric (IEPE) signal conditioning with a constant current of 2 mA for accelerating response and reducing noise

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The module provides a dynamic range of up to 102 dB, ensuring a wide frequency response and high-precision measurement.

Anti aliasing filter:

Built in anti aliasing filter with automatic sampling rate adjustment to avoid signal distortion.

Connectors and Grounding:

The module uses four BNC connectors, each with a 50 ohm resistor connected to the chassis ground to minimize grounding noise

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Users can configure each channel as AC or DC coupling through software and enable or disable IEPE excitation current

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Application areas:

NI-9234 is suitable for various vibration and sound measurement applications, including mechanical vibration analysis, acoustic measurement, noise analysis, condition monitoring, and fault diagnosis.