May 2007 > Volume 6 Issue 5

New Optically Isolated USB to RS-232/422/485 Adapters Include SeaLATCH™ Locking USB Connector

Sealevel announces two additions to the popular SeaLINK USB serial product line, the SeaLINK+I.DIN (Item# 2113) and the SeaLINK+2I.DIN (Item# 2213). Offering designers the choice of one or two serial ports, SeaLINK serial devices are the perfect way to connect peripherals such as barcode scanners, serial displays, and data acquisition modules to any USB port. Each DB9M serial port is configurable for RS-232, RS-422, or RS-485 via dip switches accessible through the case, and optical isolation protects the host computer from damaging voltage surges and ground loops commonly found in industrial and OEM applications. For maximum reliability, each adapter includes Sealevel’s patent-pending SeaLATCH locking USB connector design that prevents accidental cable disconnection.

Product Features

  • One or two RS-232, RS-422, or RS-485 ports
  • Isolation protects host computer from damaging voltage spikes and surges
  • Innovative SeaLATCH locking USB connector design prevents accidental cable disconnection
  • Convenient DIN rail mounting

Explore SeaLINK USB serial adapters and read more about SeaLATCH locking USB connectors on our website!

Getting Off the Bus to Expand I/O

Find out how to implement I/O expansion using any single board computer in an article authored by Sealevel and featured in this month's PC/104 & Small Form Factors magazine. The article, “Getting Off The Bus To Expand I/O”, details the evolution of the PC/104 bus including the recent trend by several SBC manufacturers to abandon the traditional PC/104 ISA bus in favor of higher speed bus standards.

With the choices continuing to evolve, system designers may have difficulty deciding which SBC and expansion architecture to choose.  While PCI-104 and PCI Express offer fast data rates, relatively few compatible I/O boards are available today. Fortunately, selecting the best SBC for the job does not depend on hardware bus expansion options. Many designers are choosing I/O solutions using features common to most small form factor SBCs such as serial ports, Ethernet, and USB. To find out how, read the entire Getting Off The Bus To Expand I/O article on our website.

Sealevel Software™

Did you know?  Sealevel software supports the Microsoft Windows Vista™ operating system for the following products:

Sealevel’s software drivers and utilities make installation and operation easy using Microsoft Windows or Linux. Click on the software link above to download the current version for your Sealevel products.

Sealevel will be closed Monday, May 28th, 2007 in observance of Memorial Day. Sealevel observes this national day of remembrance to honor the men and women who died while defending our Nation and its values. We will reopen Tuesday, May 29th, 2007 at 8:00AM EST.


In This Issue


Featured Accessory

Terminal Block – DB9 Female to 9 Screw Terminals
Item# TB05
The TB05 terminal block breaks out a DB9 connector to 9 screw terminals to simplify field wiring of serial connections including RS-422 and RS-485 networks. The TB05 includes holes for board or panel mounting. Check out the TB05 and Sealevel’s terminal block adapters for a variety of other connectors on our website.


Contact Us

Sealevel Systems, Inc
864.843.4343 tel
864.843.3067 fax

Mailing Address:
PO Box 830
Liberty, SC 29657

Shipping Address:
2779 Greenville Highway
Liberty, SC 29657

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Customer Spotlight

SeaNOTE: Embedded USB I/O Expansion

Most single board computers provide internal USB ports that are perfect for expanding embedded systems using Sealevel’s USB OEM Boards. In this example, Sealevel’s Relio™ R3000 industrial computer integrates a USB iPorthole™ using the 3.2” x 3.1” Porthole™ footprint. Also shown are SeaI/O-OEM modules that can interface a large amount of I/O through a single internal USB connection to the system’s SBC. Developers can use the SeaMAX API to easily access the I/O from their application program.

Please visit our website for more information on Sealevel’s Industrial Computing Solutions.


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