National Instruments Corporation NI PCIe-8431/8, 8 Port, RS485/RS422 Serial Interface
The NI PCIe-8431/8 is an 8-port, high-performance serial interface device designed for PCI Express systems, supporting RS485 and RS422 communication standards. Manufactured by National Instruments, this board enables asynchronous serial communication with up to eight devices simultaneously, making it suitable for industrial automation, data acquisition, and control applications. Each port is fully isolated for robust operation in electrically noisy environments, and the device supports high baud rates up to 3 Mbps per port. The PCIe-8431/8 is compatible with NI software tools such as NI-Serial driver and LabVIEW, ensuring seamless integration and configuration. The board features advanced features like hardware handshaking, event-driven programming, and flexible port configuration. It is designed for reliable, long-term operation in demanding environments, and is backed by National Instruments technical support and documentation.