M.2 B+M Key to 2-port DB9 RS232 Serial Adapter

M.2 B+M Key to 4-port DB9 RS232 Serial Adapter

PCI 2-port DB9 RS232 Serial Card with WCH CH351Q Chipset

PCI MCS9865 2-port DB9 RS232 Serial Card with 16550 UART

PCI MCS9865 4-port DB9 RS232 Serial Card with 16550 UART

PCI 8-port DB9 RS232 Serial Card with SB16C1058PCI Chipset

PCIe x1 AX99100 1-port DB9 RS232 Serial Adapter Card with 16950 UART

PCIe x1 2-port DB9 RS232 Serial Adapter Card with WCH CH382L Chipset

PCIe x1 AX99100 2-port DB9 RS232 Serial Adapter Card with 16950 UART

PCIe x1 OXPCIe952 2-port DB9 RS232 Serial Adapter Card with 16950 UART

PCIe x1 MCS9901 2-port DB9 RS232 Serial Adapter Card with 16C950 UART

PCIe x1 4-port DB9 RS232 Serial Adapter Card with WCH CH384L Chipset

PCIe x1 AX99100 4-port DB9 RS232 Serial Adapter Card with 16950 UART

PCIe x1 AX99100 4-port RS232 Serial Adapter Card with DB44 to DB9 Break-out Cable

PCIe x1 MCS9904 4-port DB9 RS232 Serial Adapter Card with 16C550 UART

PCIe x1 SB16C1058PCI 8-port DB9 RS232 Serial Adapter Card with 16C1050 UART

PCIe x1 XR17V358 8-port RS232 Serial Adapter Card with DB62 to DB9 Breakout Cable