The National Instruments PXI-6239 (Part Number: 779626-01) is a robust PXI Multifunction I/O Module designed for versatile data acquisition applications. This module supports both single-point and multiple-channel analog-to-digital (A/D) conversions, allowing for comprehensive data collection across numerous test scenarios. Equipped with a substantial first-in, first-out (FIFO) buffer, the PXI-6239 ensures that no data is lost during analog input (AI) acquisitions, even under high-speed conditions. The module can handle various A/D conversion tasks, employing direct memory access (DMA), interrupts, or programmable input/output configurations.

Featuring an integrated A/D converter, the PXI-6239 effectively digitizes analog signals, transforming them into precise digital representations. The inclusion of digital isolators facilitates a robust electrical isolation between the analog front end and the system ground, maintaining signal integrity. The module provides an extensive input range for its analog input channels, allowing for flexibility in signal measurement with programmable gain. However, users should be mindful that selecting a wider input range can diminish measurement resolution, whereas a narrower range enhances resolution but increases the risk of signal saturation.

With its capability to sample multiple channels at rates up to 250 kS/s, the PXI-6239 is optimized for high-precision measurements. When designing measurement systems, particularly in multichannel applications, settling time must be considered as it can influence the overall accuracy of the collected data. The module is designed to recalibrate the NI-PGIA according to the new channel's input range when switching between channels, ensuring consistent measurement fidelity.

Although the PXI-6239 is now classified as obsolete, its Multifunction I/O capabilities will remain available for purchase and repairs through Apex Waves. The module conforms to standard 3U PXI dimensions and carries a warranty valid for 2-3 years. For additional details, user manuals, and maintenance resources, customers can access them online. Interested parties should contact a sales representative for pricing information.