2/4Port RS422/485 Serials PCIExpress2.0 Card This PCI Express 2.0 card supports asynchronous full duplex communication over twisted pair or shielded cable, suitable for factory settings or home workshops. Provides 2 or 4 RS422/485 serial ports, enabling engineers and IT professionals to integrate multiple serial devices into their systems seamlessly. Built for performance serial communication in both home and industrial applications, with flexible port configuration on a single PCI Express card. Automatic IRQ address allocation simplifies installation, and builtin DCDC isolation power offers protection against ground interference for improved reliability. Designed to expand system connectivity without compromising stability, ideal for upgrading legacy equipment or enabling serial workflows. Key specifications and assets Interface: PCI Express 2.0 Port count: 2 or 4 RS422/485 serial ports Communication: Asynchronous full duplex RS422/485 Cable compatibility: Twisted pair or shielded cable Power isolation: Builtin DCDC isolation power IRQ handling: Automatic IRQ address allocation Form factor: PCI Express 2.0 card 23 practical use scenarios Industrial automation and control: Connect PLCs, sensors, meters, and other RS422/485 devices to a PC for data logging, monitoring, and control in a factory environment. Data acquisition and instrumentation: Link multiple RS422/485 sensors and data loggers to a single workstation for synchronized measurements and analysis. Legacy equipment integration: Add serial connectivity to modern PCs for POS terminals, measurement equipment, or other legacy devices that rely on RS422/485 interfaces. Why choose this card Flexible port configuration (2 or 4 ports) on a single PCI Express 2.0 card to match your needs. Robust communication with support for asynchronous full duplex over common serial cabling. Easy installation through automatic IRQ allocation and builtin isolation power to reduce grounding issues. Suitable for both home and industrial applications, offering reliable serial expansion without complex setup.