PCI 2-Port RS-485/RS-422 Serial Adapter Card — MCS9865 Chipset

Adds two serial interfaces to a standard PCI slot, converting PCI to RS-422 and RS-485 connections. This adapter card provides dual RS-485/RS-422 ports and is built around the MCS9865 chipset for stable serial communication. Ideal for systems that require additional RS-485 or RS-422 connectivity via a PCI expansion slot.