The National Instruments PCI-6254 (Part Number: 779071-01) is a high-performance Multifunction DAQ board designed for applications requiring rapid data acquisition and precise measurements. As part of the M Series family, this device employs NI-MCal tuning technology to enhance measurement accuracy, coupled with advanced components such as the NI-STC 2 system controller and the NI-PGIA 2 programmable amplifier, which work synergistically to improve data fidelity. The PCI-6254 features 32 single-ended or 16 differential analog input channels, each with a 16-bit resolution and capable of operating at a maximum sampling rate of 1.25 MS/s per channel, and an aggregate average sampling rate of 1 MS/s for multichannel configurations. Digital capabilities include 48 digital I/O channels and two counter/timer I/O lines with 32-bit resolution operating at 80 MHz. The device is equipped with a comprehensive analog and digital trigger system, which allows for enhanced precision with four times increased resolution. Connectivity is facilitated through two 68-pin VHDCI I/O connectors.

The PCI-6254 supports an external digital trigger with selectable polarity and provides a maximum operating voltage of ±11 V for both signal and common modes. It also incorporates a built-in NIST-traceable calibration standard, ensuring reliable performance. The recommended operating temperature range is from 0 °C to 55 °C, and the device is housed in a compact form factor, measuring 3.8 x 6.1 inches and weighing 5.3 ounces. The device is supported by NI-DAQmx and NI-DAQmx Base driver software, which enhances system performance and stability by ensuring effective communication between the DAQ hardware and system software. The PCI-6254 has been designated as a legacy product by National Instruments, although it remains available for purchase and repair through authorized providers such as Apex Waves.