The National Instruments NI-6581B is a high-performance Digital I/O Adapter Module designed for FlexRIO systems, featuring support from the Kintex-7 FPGA. This module supports a maximum clock rate of 100 MHz and offers 54 single-ended digital channels, enabling efficient parallel information processing that would otherwise be too resource-intensive for traditional programming approaches. The NI-6581B is fully programmable with the NI-RIO driver and the LabVIEW FPGA Module, facilitating rapid data acquisition, signal generation, and hardware-implemented signal processing and control functionalities.

Equipped with a user-programmable FPGA, the NI-6581B allows for seamless integration of flexible I/O operations and complex functions such as hardware comparison, waveform linking, and other FPGA-based calculations using either the LabVIEW FPGA programming environment or VHDL. The LabVIEW FPGA Module simplifies FPGA development by utilizing graphical programming, effectively capturing parallelism and data flows, allowing users to create custom measurement and control systems without delving into lower-level hardware description languages.

The module features two VHDCI connectors, each providing 24 general-purpose digital I/O lines, three PFI lines, one output line, and one input line, facilitating a robust connectivity solution. The compatible interface cables include the NI SHC68-C68-D4 for connection to terminal blocks such as the NI SMB-2163 or NI CB-2162. The pinout of the NI-6581B aligns with that of other NI high-speed digital instruments, ensuring seamless integration within complex system architectures. Measuring 5.1 x 0.8 x 4.7 inches and weighing 10 ounces, the NI-6581B is a compact and powerful addition to any industrial automation setup. For additional support, a user manual and maintenance manual are available for download. Pricing information can be obtained by contacting a sales representative.