National Instruments PCI-6251

The National Instruments PCI-6251 (Part Number: 779070-01) is a high-performance multifunction data acquisition (DAQ) board from the M Series, designed to meet the demands of applications requiring rapid sampling and high accuracy. This board offers 16-bit resolution for analog input with the flexibility of utilizing either 8 differential or 16 single-ended channels. Featured with the NI-PGIA 2 amplifier, the PCI-6251 ensures minimal settling times at optimal scanning rates while maintaining precision at peak performance levels. It boasts a maximum aggregate sample rate of 1.00 MS/s across multiple channels and can deliver up to 1.25 MS/s for a single input channel. With an accuracy within 50 ppm and a timing resolution of 50 ns, it guarantees excellent synchronization for time-critical processes. The board effectively reduces crosstalk, achieving -95 dB for non-adjacent channels and -75 dB for adjacent channels, alongside a common-mode rejection ratio (CMRR) of 100 dB, enabling it to handle input ranges from ±0.1 V to ±10 V. Additionally, it supports various triggering functions, including start, reference, and pause triggers, as well as precision analog triggering with a 10-bit resolution. The analog output section features two channels, also with 16-bit resolution, and supports a maximum update rate of 2.86 MS/s in single-channel operation. Incorporating essential features such as differential non-linearity (DNL) correction and overdrive protection, the PCI-6251 ensures excellent signal integrity. Its versatile data transfer capabilities—including interrupts, DMA, and programmable I/O—allow for efficient data handling across a wide range of applications such as laboratory automation, research, design verification, and industrial testing. Built to last in demanding environments, this compact DAQ board also integrates seamlessly with SCC or SCXI signal conditioning modules, allowing for high-voltage and sensor measurements. Enhanced performance and accuracy are further supported by inbuilt NI-MCal calibration technology and the NI-STC 2 system controller.