2Port or 4Port RS422/485 Serial PCI Express 2.0 Card Benefits and key features Enhanced connectivity and performance serial communication for both home and industrial applications. 2port or 4port RS422/485 interfaces provide flexible expansion to connect multiple serial devices. PCI Express 2.0 form factor fits standard PCIe slots for easy installation in desktop and compatible systems. Automatic IRQ address assignment simplifies setup and minimizes IRQ conflicts. DCDC isolation power delivers electrical isolation and helps protect against ground interference, improving reliability in diverse environments. Suited for engineers and IT professionals who need to integrate multiple serial devices into existing systems. Supports asynchronous full duplex communication over twisted pair or shielded cable, enabling a wide range of serial networking configurations. Specifications and compatibility Interface: RS422 and RS485 serial communication Port options: 2port or 4port configurations Interface standard: PCI Express 2.0 Application scope: Suitable for home workshops and industrial settings Communication mode: Asynchronous full duplex Cable topology: Twisted pair or shielded cable Use scenarios Factory automation and control: Connect multiple RS485 field devices, PLCs, sensors, and remote I/O modules to central control systems for streamlined data collection and command signaling. IT infrastructure and data logging: Integrate several serial peripherals such as data loggers, instrument controllers, or legacy devices into a modern system without sacrificing performance. Home lab and development: Interface microcontroller projects and development boards with RS422/485 interfaces for testing, prototyping, and educational experiments. Notes The card emphasizes easy installation through automatic IRQ assignment and robust protection against ground interference via DCDC isolation power. Designed to help engineers and IT professionals seamlessly expand serial connectivity in both home and industrial environments.