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The Perle UltraPort SI PCI cards are the most advanced low profile serial card solutions on the market today for your serial communications board, providing a complete range of solutions for retail point of sale, data acquisition, industrial automation, advanced kiosk design and much more. Perle UltraPort SI with software selectable interfaces, provides the ability to make dynamic configuration changes between RS-232 and RS 485 cards, as well as Rs422 communications port access without having to take down the server. This ensures maximum availability for mission-critical operations. Each port can be configured individually to any interface type.