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National Instruments 784471-01 Flexible Resolution PXI Analog Input Module

The National Instruments 784471-01 is a 32-channel flexible resolution PXI Analog Input Module. It is designed for precise data acquisition and measurement applications. It is also identified as the PXIe-4309 unit. It features 8 x simultaneously sampling SAR ADCs that allows for high-accuracy data collection across multiple channels. The 784471-01 module supports sampling rates up to 2 MS/s per channel when using a single channel per ADC, and up to 10 kS/s per channel for all 32 channels in high-accuracy mode. Its resolution is adjustable that ranges from 18 bits at the highest sample rates to 28 bits at lower rates.

The NI 784471-01 unit offers advanced features such as on-board signal averaging and filtering, auto-zero measurement switching, and a chopping mode that enhances noise rejection. The chopping mode uses paired channels to achieve accurate and repeatable measurements at the nano-volt level. This is particularly useful in low-level signal measurements where minimizing noise is critical. The module's input voltage range is highly flexible that supports ±0.1 V, ±1.0 V, ±10 V, and ±15 V ranges. The overrange protection of this unit is 0.5% along with ±30 V overvoltage protection.

The 784471-01 module's absolute accuracy is maintained through various auto-zero modes that include none, once, and every sample, each providing different levels of compensation for offset errors. This feature ensures reliable performance over long periods, even under varying temperature conditions. The NI 784471-01 is designed for easy integration into PXI Express systems along with a compact form factor and compatibility with hybrid slots. It also includes a 96-pin I/O connector for versatile connectivity and a FIFO buffer of 1,023 samples to manage data flow efficiently during high-speed acquisitions.

The module utilizes a single timing engine for synchronization and timing. It also supports multiple trigger sources and digital timing signals. This allows for precise control and synchronization in complex test setups. This 784471-01 DAQ device operates within a wide temperature range of 0 °C to 55 °C. It is built to withstand harsh industrial conditions that include shock and vibration.