Designed for engineers and IT professionals who need to integrate multiple serial devices into a single system, this PCIe expansion card enables seamless connections and scalable growth. Automatic IRQ address allocation reduces conflicts during installation, and builtin DCDC isolation power provides protection against ground loops and electrical interference for stable operation in demanding environments. Features XR17V358 series Multi I/O PCIe controller with industry standard 16C550 UART compatibility, delivering costeffective connections for industrial machines and projects. Enhances connectivity with 2 or 4port RS422/485 serials on a PCIe 2.0 interface, delivering performance serial communication for both home and industrial applications. Use scenarios Industrial automation and data acquisition: connect multiple RS422/485 serial devices such as PLCs, sensors, and data loggers to a single host system for streamlined control and monitoring. Lab and development environments: attach microcontroller boards, instruments, and measurement equipment to a PC for testing, scripting, and data collection. Remote monitoring and field service: establish reliable serial links to remote equipment, diagnostics, and maintenance tools in challenging environments.