The National Instruments 781441-01 is a sophisticated Multifunction I/O Device, identified as the USB-6353, designed to meet a diverse range of data acquisition and control requirements. This module features 16 differential or 32 single-ended analog input channels, equipped with a 16-bit analog-to-digital converter (ADC) that supports a maximum sampling rate of 1.25 MS per second for single-channel operation and 1.00 MS per second for multi-channel applications, with no minimum sampling constraints. It accommodates a variety of input voltage ranges, including ±0.1 V, ±0.2 V, ±0.5 V, ±1 V, ±2 V, ±5 V, and ±10 V, and has a maximum working voltage of ±11 V. The input impedance is less than 10 GΩ in parallel with 100 pF when active and 820 Ω when inactive.

In addition to its robust input capabilities, the 781441-01 also provides four analog output channels, featuring a 16-bit digital-to-analog converter (DAC) capable of generating signals at varying update rates: 2.86 MS per second for one channel, 2.00 MS per second for two, 1.54 MS per second for three, and 1.25 MS per second for four channels. Timing accuracy is specified at 50 parts per million (ppm) relative to the sample rate, with a timing resolution of 10 ns. Output characteristics include a low impedance of 0.2 Ω and an output current drive of ±5 mA, supplemented with overdrive protection up to ±25 V and 26 mA.

The device requires a power supply of 11 to 30 VDC and comes fitted with a 3.5 mm pitch pluggable screw terminal with secure screw locks. It occupies a physical space of 26.4 cm x 17.3 cm x 3.6 cm (10.4 in x 6.8 in x 1.4 in) and weighs 1.42 kg (3 lb 2 oz). Designed for versatile applicability, it operates effectively in ambient temperatures between 0 to 45 degrees Celsius and humidity levels from 10% to 90% RH (non-condensing), with storage conditions ranging from -40 to 70 degrees Celsius and humidity levels from 5% to 95% RH (non-condensing). The 781441-01 Multifunction I/O Module comes complete with a 128 screw terminal I/O connector, ensuring ease of integration into existing systems.