https://www.startech.com/en-it/cards-adapters/pex8s232485
8 Port PCI Express (PCIe) RS-232/422/485 Serial Card - 4 x RS232 4 x RS422 / RS485
8 Port PCI Express (PCIe) RS-232/422/485 Serial Card - 4 x RS232 4 x RS422 / RS485
https://www.startech.com/en-de/cards-adapters/pci2s232485i
2 Port RS232/422/485 PCI Serial Adapter Card w/ ESD Protection
2 Port RS232/422/485 PCI Serial Adapter Card w/ ESD Protection
2 port