2-port ISA RS422/485 interface

7 November 2001 Computer/Embedded Technology

Sealevel Systems' Ultra SIO provides the PC with two isolated RS422/485 asynchronous links to data collection and other devices.

Isolation is important in installations where the equipment connected to the PC is either located far from the host system, or on a different power transformer circuit. The optical isolation feature of the Ultra SIO eliminates the risk of ground loop current, a commonly neglected and misunderstood phenomenon which leads to data errors and the destruction of communications equipment.

Individually selectable addresses and extended 'AT' interrupts allow for seamless integration into Windows and OS/2 systems. The Ultra SIO appears to the host system as a standard COM:port requiring no special drivers or additional software. Sealevel includes its Advanced COM drivers for Windows 95/98/NT and 2000 providing IRQ sharing, Windows serial diagnostics, and other enhanced features. Linux and QNX utilities are also included to simplify installation.

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