RS-232 I/O series, a line of PCI Express Multi-port Serial Communication Board, is designed to meet PCI Express Base Specification Ver2.0. It can be installed in virtually any available PC system and compatible with all major operating systems. Users do not need to manually set jumpers to configure I/O addresses and IRQ locations. Besides this board supports 5VDC or 12VDC of power from each serial port via 1/4/8/9 pin output. It’s convenient for users connecting serial devices without addition external power supply. This board offer independent serial ports for connecting terminals,modems, printers, scanners, cash registers, bar code readers, keypads,numeric displays, electrical scales, data acquisition equipment, and other serial devices for the PC and compatible systems. This board offers a reliable and high performance solution for serial multi-port communications.