From 6:00 PM CST Friday, Feb 15th - 2:00 AM CST Sunday, Feb 17th, ni.com will be undergoing system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
From 6:00 PM CST Friday, Feb 15th - 2:00 AM CST Sunday, Feb 17th, ni.com will be undergoing system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
Life Cycle Status: Mature
2-Port, PCI, RS485/RS422 Serial Interface Device—The PCI‑8431/2 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.
Explore a wide range of support content, including examples and troubleshooting information.