The National Instruments 779138-01 C Series Voltage Input Module, commonly referred to as the NI-9215, is designed to interface seamlessly with CompactDAQ and CompactRIO systems. This module features four simultaneous analog input channels, each equipped with 16-bit successive approximation register (SAR) analog-to-digital converters (ADCs), delivering precise functionality for diverse applications. It supports a differential analog input range of ±10 V, with standard input specifications of ±10.4 V, ensuring flexibility and accuracy across various industrial and laboratory measurement tasks.

The NI-9215 is available with two connector options—10-position screw terminal or BNC—to accommodate different integration preferences. Built for demanding environments, the module operates effectively within an ambient temperature range of -40 °C to 70 °C and a storage temperature range of -40 °C to 85 °C. It functions in humidity levels from 10% RH to 90% RH (non-condensing) during operation and can be stored in conditions of 5% RH to 95% RH (non-condensing). The device has an IP40 ingress protection rating and meets Pollution Degree 2 criteria, making it suitable for industrial applications at elevations up to 2,000 meters.

With a rugged construction that withstands operational vibrations up to 5 g RMS (random) and 5 g (sinusoidal) between 10 Hz and 500 Hz, along with resilience to 18 shocks at six orientations for a 30 g (11 ms half sine) operating shock, the NI-9215 ensures reliable performance under challenging conditions. To maintain consistent accuracy, the module includes NIST-traceable calibration, with a recommended calibration interval of one year. Additionally, its double isolation barrier enhances safety and noise immunity, critical for accurate data collection in noisy industrial environments. The 779138-01 is ideal for applications such as data logging, industrial automation, and laboratory research requiring fast and accurate voltage measurements.