StarTech.com 4 Port PCI Express PCIe Serial Combo Card - 2 x RS232 2 x RS422 / RS485

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. 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 clu