Price may vary with addition of accessories and services.
Contact us with questions for pricing.
Online purchasing is unavailable. NI currently does not offer online purchasing for your selected country. Please work with one of our distributors who can help you find what you need.
The PXI‑8431/4 is a high-performance interface for high-speed communication with RS485 and RS422 devices. It features high-performance DMA transfers, multithreading, and multiprocessor support. You can also select between 4‑ and 2‑wire transceiver modes for full- and half-duplex communication. NI serial interfaces also appear as standard COM ports for compatibility with programs that use serial communications.
You can request repair, schedule calibration, or get technical support. A valid service agreement may be required.
Search for answers to frequently asked questions and troubleshooting tips for common errors written by NI engineers.
Ask questions, explore solutions, and participate in discussions with other NI Community members.
Access hundreds of self-paced lessons, application-focused learning paths, and get started with product set-up tutorials.