Serial communication is one of data communication means, safer and cheaper than parallel communication in distant communication. It has been widely used in computer and device communication since the dawn of computer spread.
Almost all facilities in industrial sites and manufacturing equipments in factories use serial communication as their default communication means.
PC only has one or two serial ports, thus the need for more PCs arises when connecting a number of devices to the PC. However, this method is neither cost-effective nor rational. PCs in general consist of an optional slot for such extension needs. There are many types of slots such as ISA/PCI BUS, USB, IEEE 1394, and still others. A serial “Multiport” mounts multiple serial ports on one board or one box, enabling installation on a PC option slot.

Multi-1/PCI Series is a Universal PCI Multiport Serial Board designed for POS, ATM, OA and FA applications. Multi-1/PCI Series is designed to supply 5V and 12V power to an external device by using the No. 9 pin (RI signal line) according to a user's choice. The function allows you to utilize devices requiring low power consumption such as barcode readers and receipt printers without an additional power supply.

Multi-1/PCI Series provides maximum performance and stability with the help of single chip developed by SystemBase: SB16C552PCI. SB16C552PCI is a single chip that enables two asynchronous serial communication ports to be implemented to PCI BUS without glue logic. It is an optimal solution that constitutes a serial port for PCI BUS. Unlike other similar products, Multi-2/PCI Series supports 66MHz BUS operation speed, thereby being applicable to a high-speed BUS such as PCI-X.

• 1 ports per board
• RS232 or ALL(RS232/422/485 all-in-one)
• Serial Interfaces
• Serial communication speed of up to 921.6Kbps
• 16-byte FIFO and device driver control for RS422/485 auto toggling
• RI signal line power supply (Panel type, 5V or 12V power supplied)
• Built in 15KV ESD Protection
• Optional 2.5KV optical isolation protection for RS232/422/485
• Universal PCI compatible with 3.3/5V
• PCI and PCI-X
• MD1 Low profile board for compact-sized PCs
• Windows 2003/XP/2000/98/ME, Linux, and

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