The National Instruments PCI-6513 is a sophisticated digital I/O device designed to enhance the reliability of data acquisition tasks. It features a computerized channel option for data lines that minimizes input data glitches through effective signal conditioning. This device can be utilized with change detection, wherein filtering capabilities reduce the number of transitions that need to be evaluated and processed. Users can configure advanced input channels to use digital filtering after the photocouplers, allowing for precise control over the timing interval for filtering operations. Notably, the device permits signals with pulse widths shorter than half of the specified timing interval to pass while allowing longer pulses to be processed with clarity. Intermediate pulse lengths may yield variable outcomes based on the filtering criteria set.

The PCI-6513 is equipped with a 100-pin keyed female SCSI I/O connector and can handle a maximum input voltage of ±30 VDC, with an individual input current of 12.5 mA per line. The onboard photocouplers operate more efficiently in transitioning from low to high states, ensuring faster detection of rising edges compared to falling edges. The device also supports configurable floating inputs and allows multiple input lines to share the same timing interval, ranging from 200 μs to 200 ms. Two essential clocks govern the device’s filtering process: a sample clock with a 100 ns period and a channel clock generated by a counter, which operates at one-half the timing interval. Changes to the input signal are recognized when they remain stable for at least two consecutive rising edges of the channel clock.

The PCI-6513 is compatible with NI-DAQmx driver software, which integrates seamlessly with development environments including LabVIEW, LabWindows/CVI, and Measurement Studio. The device weighs 2.5 oz and measures 5.54 x 4.47 inches, making it well-suited for compact applications. With an operational temperature range of 0 °C to 55 °C, the PCI-6513 is built for reliability in demanding environments. For procurement, please consult a sales representative for pricing and additional information.