UOTEK PCI Express PCI-E to RS-485 RS-422 Serial Card 2 Ports DB9 RS485 RS422 PCIE Converter Industrial Optical Isolation UT-792I UOTEK PCI Express PCI-E to RS-485 RS-422 Serial Card 2 Ports DB9 RS485 RS422 PCIE Converter Industrial Optical Isolation UT-792I. Sale price : $67.73 Category : Computer & Office