The National Instruments PCI-6255 (Part Number: 779546-01) is a high-performance multifunction data acquisition (DAQ) device that excels in computer-based measurement systems. Part of the M Series, this DAQ supports a variety of measurement applications, including laboratory automation and manufacturing testing. It features 40 differential analog input channels with optional single-ended configurations, providing 16-bit resolution and an impressive common mode rejection ratio (CMRR) of 100 dB. The device can achieve a single-channel sample rate of up to 1.25 MS/s and a multichannel sample rate of 750 kS/s. The input voltage range is +0.1 V to +10 V, with a bias current of +100 pA.

Additionally, the PCI-6255 includes two 16-bit analog output channels, capable of sampling at rates up to 2.86 MS/s and featuring a low output impedance of 0.2 Ω. The device is equipped with two 32-bit counter/timer I/O channels operating at 80 MHz and 24 individually programmable digital I/O channels with a voltage protection level of +20 V. The I/O connectivity is facilitated through two 68-pin VHDCI connectors, ensuring versatile integration into various systems.

Power requirements for the PCI-6255 include 0.03 A at +5 V, 0.725 A at +3.3 V, and 0.35 A at +12 V. The device's compact design measures 3.8 x 6.1 inches and weighs 5.8 ounces, making it suitable for various physical configurations. The recommended operating temperature range is from 0 ºC to 55 ºC, with a storage temperature range of -20 ºC to 70 ºC. The PCI-6255 is compatible with NI-DAQmx driver software, facilitating the development of customized automated control applications. Though designated obsolete by National Instruments, Apex Waves continues to provide availability for purchase and repair, ensuring longevity and support for this versatile DAQ solution.