Key benefits Cost effective, industry compatible serial connectivity Uses the XR17V358 series multi‑I/O PCIe controller with support for the industrystandard 16C550 UART, enabling economical connections for industrial machines. Flexible ‑performance RS422/485 expansion Provides 2 or 4 RS422/485 serial ports on a PCI Express 2.0 card, delivering reliable, ‑performance serial communication for both home and industrial applications. Easy installation with robust protection Automatic IRQ allocation and built‑in DC‑DC isolated power simplify installation and offer improved protection against ground interference. Versatile communication options Supports asynchronous full‑duplex communication over twisted pair or shielded cable, enabling a range of wiring configurations for different environments. Key specifications and features Controller: XR17V358 series multi‑I/O PCIe controller UART compatibility: 16C550 industry standard Ports: 2 or 4 RS422/485 serial ports Interface: PCI Express 2.0 card Power and protection: built‑in DC‑DC isolation power Installation: automatic IRQ address allocation Communication mode: asynchronous, full duplex Cabling: supports twisted pair or shielded cable Use scenarios Industrial automation and factory floor networks Connect PLCs, HMI panels, and field devices using RS422/485 serial links for reliable, multi‑point communication in manufacturing or process control environments. Data acquisition and remote monitoring Deploy serial sensors and data loggers, enabling robust RS422/485 data collection and transmission to a central controller or PC for logging and analysis. Home workshop and development Interface microcontrollers, embedded projects, or legacy serial peripherals in a computer‑based development or test setup, with flexible port counts and dependable serial performance. Compatibility and installation notes Fits standard PCI Express 2.0 slots Maintains compatibility with 16C550 UARTbased software and drivers Designed for reliable operation in both industrial and consumer environments This description preserves the original product brand, specifications, models, and functions while presenting clear, customer‑friendly information about benefits, features, applications, and practical use cases.