Add two RS232, and two RS422/485 serial ports to your PC through a PCI-Express expansion slot. The PEX4S232485 4 Port PCI Express PCIe Serial Combo Card - 2 x RS232 2 x RS422 / RS485 lets you add two RS232, and two RS422/485 serial ports to your PC through a PCI-Express expansion slot.
This PCI express serial card is a single card solution that is compatible with nearly any serial communication protocol, supporting RS-232, RS-422, RS-485 2-wire or RS-485 4-wire operating modes.
A flexible solution for adding serial ports to full-sized, or small form factor systems, the 4-port serial card includes both low and full profile brackets while the included breakout cable helps to avoid cluttered connections.
StarTech.com 4 Port PCI Express PCIe Serial Combo Card - serial adapter - 4 ports
Interface (Bus) Type
PCI Express x1
2 cm x 7 cm x 12.5 cm
Data Link Protocol
RS-232, RS-422, RS-485
Microsoft Windows Server 2003, Microsoft Windows Server 2008 R2, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows 2000/XP/Vista/7/8/8.1/10