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Sealevel Systems Introduces Multi-Interface PC/104 Serial Communications Adapter

Date: 01/27/2003

For Immediate Release

Liberty, SC (December 3rd, 2002) - Sealevel Systems, Inc. announces an addition to the company's PC/104 product line: the SIO.104+2, a dual port RS-232/422/485 interface adapter. Designed to meet the core needs of PC/104 applications requiring high reliability, small size, and long term availability, the SIO.104+2 is available in both standard and extended temperature range models.

Conforming strictly to the PC/104 specification, the SIO.104+2 provides two RS-232/422/485 ports, allowing field-selectable connection to a variety of real-world devices. Each port can be individually configured and offers automatic control of the RTS signal when using RS-485 mode.

The SIO.104+2 is designed using the XR16C850 UART, which supports standard PC data rates and boasts a top speed of 460.8K bps. The SIO.104+2 provides a 128-byte FIFO, 16 times larger than boards designed with 16C550 parts, to allow error free operation even in high-speed applications

SIO.104+2 ships with Sealevel Systems? SeaCOM? suite of Windows 95/98/ME/NT/2000/XP drivers. Sealevel also Includes WinSSD, a full-featured application providing powerful testing and diagnostic capabilities. Use WinSSD for BERT (Bit Error Rate Testing), throughput monitoring, loopback tests, and transmit test pattern messages.

In addition to Windows drivers and utilities, SeaCOM? includes drivers, utilities, application notes, and technical details to simplify installations in DOS, QNX, and LINUX.

The SIO.104+2, part number 3502, is available immediately from stock. Price is $169.00 in low volume quantities, and like all Sealevel products, the SIO.104+2 is backed by a lifetime warranty.

For more information on Sealevel Systems, please contact Earle Foster at Sealevel, by phone at 864.843.4343 x116, or by email at


Sealevel Systems, founded in 1986, provides industrial computing solutions in addition to a variety of communications and I/O products including PCI Express and PCI Bus cards, Ethernet serial servers, and USB serial adapters. The product line includes multi-port RS-232, RS-422/485, RS-232/422/485 multi-interface high-speed sync/async, and digital/relay I/O. For more information visit or call 864-843-4343.


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