National Instruments 779182-01

The National Instruments 779182-01, also known as the PXI-4224, is an isolated analog input module designed for precision measurement applications. This module features eight differential analog input channels with a 16-bit resolution, ensuring high-quality data acquisition. It supports an input voltage range of ±10 VDC, with a maximum sampling rate of 200 kS/s, facilitating efficient data collection across various scenarios. The 779182-01 integrates channel-to-channel isolation, providing 60 VDC (42 Vrms) CAT I isolation, which enhances measurement reliability even in the presence of high common-mode voltages. The module is well-suited for tasks such as isolated thermocouple measurements, multichannel data logging, and testing of fuels and batteries.

The module allows for programmable gain settings on a per-channel basis, optimizing measurement accuracy. Signal connections can be conveniently made using the TB-2725 terminal block or a 25-pin D-SUB for custom configurations. To connect a ground-referenced signal source, simply attach the signal (V+) to the 779182-01 channel input (AI X +) and the reference (V–) to the channel reference (AI X –). Employing proper shielding around the wiring helps minimize noise from capacitive or electrical coupling. Furthermore, using the NI-DAQmx software, users can leverage the DAQmxAdjust4224Cal function to modify the internal and external calibration constants of the SCMP pod; this function requires a known voltage input to operate correctly. Although the National Instruments 779182-01 has been marked obsolete, it remains available for purchase or repair services through Apex Waves.