PXIe-8431/16

The PXIe-8431/16 is a PXI Express Multiport Serial Interface Module from National Instruments, designed for high-speed industrial serial communication, automation systems, embedded control, and automated test applications. The module provides 16 RS485/RS422 serial ports in a single PXI Express slot, allowing engineers to connect and control multiple industrial serial devices simultaneously within PXI-based systems. NI lists the PXIe-8431/16 with part number 781473-02.

The NI PXIe-8431/16 is ideal for engineers who require reliable high-density serial communication with industrial equipment, PLCs, embedded systems, sensors, laboratory instruments, motor controllers, and legacy RS485/RS422 devices. The module supports both 2-wire and 4-wire transceiver modes, enabling flexible half-duplex and full-duplex communication configurations for industrial automation and data acquisition systems.

One of the major advantages of the PXIe-8431/16 Serial Module is its 16-port high-density architecture. By integrating sixteen independent RS485/RS422 serial interfaces into one PXI Express module, engineers can reduce system complexity, simplify wiring, and save chassis space in large-scale automation and test environments. Each port can operate independently, supporting simultaneous communication with multiple serial devices.

The National Instruments PXIe-8431/16 features high-performance DMA transfers, multithreading, and multiprocessor support for efficient high-speed serial communication. NI serial interfaces also appear as standard COM ports in the operating system, allowing compatibility with software applications that use conventional serial communication APIs.

Another important feature of the PXIe-8431/16 is its software integration with NI-VISA, NI-Serial drivers, and LabVIEW. Engineers can configure baud rates, communication parameters, duplex modes, and serial protocols directly through software. This flexibility enables customized industrial communication, embedded system validation, automated production testing, and multi-device monitoring applications.

Technical specifications describe the PXIe-8431/16 as supporting RS485 and RS422 communication, software-selectable 2-wire or 4-wire modes, DMA-based data transfer, PXI Express integration, and compatibility with industrial automation environments. The module includes a 68-pin VHDCI connector and ships with a 68VHDCI-to-DB9 serial cable for RS485 communication.

The PXIe-8431/16 Multiport Serial Interface Module installs into a compatible PXI Express chassis and integrates with DAQ modules, motion controllers, digital I/O hardware, RF instruments, and machine vision systems. Engineers can build modular industrial automation platforms, centralized serial communication systems, and automated validation environments within a single PXI chassis.

The PXIe-8431/16 is suitable for applications such as industrial automation, PLC communication, embedded device testing, SCADA systems, motor control, laboratory automation, multi-device monitoring, manufacturing systems, and automated production testing. Its high-density RS485/RS422 architecture makes it especially useful for systems requiring stable long-distance serial communication with multiple devices simultaneously.

Overall, the NI PXIe-8431/16 Multiport RS485/RS422 Serial Interface Module is a high-density PXI Express serial communication solution for industrial and automated test systems. With its 16 independent RS485/RS422 ports, 2-wire and 4-wire support, DMA-based communication, PXI Express integration, and compatibility with NI-VISA and LabVIEW, the PXIe-8431/16 is well suited for advanced industrial communication and automated control applications.