PCIe to 4-Port RS485/RS422 Serial Adapter Card, Industrial Grade Opto-Isolated COM Expansion Card with Surge Lightning Protection & Terminal Block for Industrial Automation & Data Communication

This industrial 4-port RS485/422 PCIe serial expansion card is specially designed for industrial automation data transmission scenarios. Equipped with four separated serial interfaces matched with detachable terminal blocks for easy cable installation and maintenance. Every channel adopts independent opto-isolation circuit and built-in surge & lightning protection components to effectively isolate high voltage interference from harsh factory environment, preventing equipment damage caused by instantaneous surge. Supporting standard RS485 two-wire and RS422 four-wire communication protocol, it features automatic flow control to guarantee reliable long-distance signal transmission. Plug-and-play on mainstream Windows and Linux operating systems, perfectly connecting PLC, industrial sensors, instrumentation and access control devices, ideal for factory automation, intelligent monitoring and industrial field communication upgrade.