StarTech.com 4 Port PCI Express PCIe Serial Combo Card – 2 x RS232 2 x RS422 / RS485 – Add two RS232, and two RS422/485 serial ports to your PC through a PCI-Express expansion slot – pcie rs485 – pci express rs485 – pcie rs485 – pci express rs422 – pcie rs422 SERIAL CARD
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. Backed by a StarTech.com lifetime warranty and free lifetime technical support. More from the Manufacturer

Startech PEX4S232485

Features

4 port (2 x RS232, 2 x RS422/485) serial combo card

RS232 data transfer rates up to 460 Kbps

Supports 2-Wire / 4-Wire RS485 modes

256-byte deep FIFO per transmitter and receiver

Standard and low-profile bracket included

Compliant with PCI-Express Specification 1.0a

Supports PCI Power Management 1.1

Guides & Documents

Brochure

Manual