Sealevel Creates PCI Express 16-port RS-232 Serial I/O Board

Sealevel Systems, Inc. pioneers another first for the industry: a 16-port RS-232 serial I/O adapter designed for the new PCI Express bus design. “Sealevel is prepared to help our customers meet their I/O needs with the PCI Express bus. This new product, the COMM+16.PCIe, has the highest serial port count available for PCI Express,” states Earle Foster, VP Sales and Marketing for Sealevel.

“While that is a powerful advantage, the COMM+16.PCIe has other features that are huge benefits to customers. For example, our board uses 16C854 UARTs with 128-byte FIFOs — 16 times larger than other boards — which provides customers error-free operation even in high-speed applications,” said Foster.

Each serial port provides a maximum data rate of 460.8K bps and the COMM+16.PCIe has an operating range from 0 – +70°C (extended temperature versions operating from -40 – +85°C are available). All Sealevel I/O products have a lifetime warranty.

The COMM+16.PCIe is ideal for connecting to PLC’s, bar code readers, scales, and other data acquisition/control devices using the included DB-25M fan-out cable (DB-9M fan-out cable available as an option). The product includes SeaCOM(TM) software for Windows 98/ME/NT/2000/XP/Vista and Linux operating systems. As an added value, customers also receive WinSSD, a full-featured application for testing and diagnostics including BERT (Bit Error Rate Testing), throughput monitoring, loopback tests, and test pattern message transmissions.

The COMM+16.PCIe standard price is $679 and product is available for shipping.

Sealevel Systems, founded in 1986, provides industrial computing solutions in addition to a variety of serial communications and digital I/O products including PCI Bus cards, Ethernet serial servers, USB serial adapters, PCMCIA cards, and PC/104 modules. Their 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.


  • PCI Express serial I/O adapter with 16 high-speed RS-232 ports
  • Fully compliant with all PCI Express x1 slots
  • Data rates to 460.8k bps
  • 128-byte FIFOs provide error-free operation for high-speed applications
  • Supports Windows 98/ME/NT/2000/XP/VISTA and Linux operating systems