National Instruments 783311-01 Voltage Input Module 

National Instruments part number 783311-01 is an identifying part number for the NI-9238, a C series Voltage Input Module. This 4-channel, 24-bit resolution module features a maximum voltage range of ±500 mV and a sampling rate of 50 kS/s/ch. 

The specialized differential analog input makes it suitable for a wide range of low-voltage sensors like current shunts and current transducers in high-current scenarios. When paired with higher-voltage C Series Voltage Input Modules, it facilitates the measurement of power and energy consumption across various applications, including appliance testing, industrial machine monitoring, power quality analysis, phasor measurements, and harmonic analysis. 

This device comes with four analog input channels with a high-resolution ADC of 24 bits, employing a Delta-Sigma structure with analog prefiltering for enhanced accuracy. Operating in simultaneous sampling mode, it facilitates synchronized acquisition across all channels, enabling precise measurements of analog signals. 

This configuration is particularly essential in applications that require synchronized data acquisition from multiple channels for accurate analysis and monitoring purposes. This device uses screw flanges to secure the connectors. Each screw terminal can hold one wire or two wires with a 2-wire ferrule. The ferrules can range from 0.25 mm2 to 1.5 mm2 in size. It weighs only 146 g (5.15 oz), which makes it easy to handle.

Users are advised to not connect the product to signals or use it for measurements within Measurement Categories II, III, or IV. Avoid connecting the product to circuits with voltages exceeding the continuous working voltage relative to earth or other channels, as this could cause damage and compromise insulation. The product can only handle transients up to its transient overvoltage rating without risking insulation breakdown or damage.