January 2005 . Volume 4. Issue 1

Welcome to Sealevel Systems' monthly newsletter. The goal is to help our valued customers easily receive timely updates on the latest Sealevel developments. We appreciate your business and continue striving to be the best communications and I/O solutions provider in the market.

In This Issue:

New RS-422/485 Low Profile PCI Serial Adapter with Power on Connector

Now available, the SIO-485.LPCI is a low-cost RS-422/485 low profile PCI serial adapter that can be field configured for RS-422, four-wire RS-485, or two-wire RS-485 communications. RS-485 network termination, critical to robust multi-drop communication, is selectable via an on-board switch. Additionally, the board features an industry standard connector that will accept +5V or +12V from any standard PC power supply hard drive or floppy connector. The supplied power is passed through to pin 9 of the board’s connector. This allows easy connection to Sealevel RS-485 SeaI/O modules, RS-422/485 POS (Point of Sale) systems, or any other real world device that expects power from the serial connection.

The SIO-485.LPCI utilizes an Oxford 16C950 UART with 128-byte FIFO, eight times larger than boards with 16C550 compatible UARTs, and supports standard PC data rates with a top speed of 921.6K bps. The larger buffer allows error free operation even in high-speed serial applications, and the 16C950 UART supports features including isochronous mode, 9-bit protocol, and a baud rate prescalar.

For more info on the SIO-485.LPCI RS-422/485 Low Profile PCI Serial Adapter click here: http://www.sealevel.com/product_detail.asp?product_id=815

Sealevel Systems Announces The First Internal USB Box Header to RS-232 Serial Adapters

Sealevel Systems, Inc. has launched the first internal USB to RS-232 serial adapters, available in both one-port and two-port models. These devices are intended for mounting directly to a PC's chassis, eliminating the need for external converters and providing a clean, professional installation. All models are USB bus powered, are capable of data rates to 460K bps, and install inside the computer in a spare bracket location or in a DB-9 "punch-out".

The SeaLINK+232.PC single port serial adapter is available with either a low profile PC bracket (Item# 2108) or standard PC bracket (Item# 2108S) while the two-port model ships with a standard PC bracket (Item# 2208). Sealevel includes a 14" cable (Item# CA260) that connects the SeaLINK devices to most motherboard USB box header connectors and uses only one USB port per serial port. Other cable options are available on a custom basis.

For more information on Sealevel's first internal USB to RS-232 serial adapters click on the folowing links: One-Port Serial Adapter, Two-Port Serial Adapter.

Sealevel Application Notebook

Control Discrete I/O Through a Wireless Network!
SeaI/O M-series modules offer a variety of I/O configurations and interface via RS-485 (Modbus/RTU). In many cases where the host controller is not located near the I/O, long runs of cabling are impractical. To facilitate wireless control of the I/O, now Sealevel offers three RF serial modem choices for the host connection and an RF to RS-485 serial modem to interface SeaI/O devices.

Sample configuration
Use a USB wireless RF serial modem (Item# 9X9CU) to connect to a USB port of the host PC, laptop, or mobile computer.

To view the entire application note detailing wireless configurations with Ethernet, USB, & Serial host connections, please click here: http://www.sealevel.com/knowledgebase/article.asp?article_id=48

Text Box:  Complimentary Book Offer!
(Book offer good for the first 250 respondents.)

We want to know more about your specific I/O requirements. Complete this Brief Survey and we will mail you a copy of Sealevel's new resource titled, The Digital I/O Handbook ($19.95 value).

Coauthored by renowned technical author Jon Titus and the President and CEO of Sealevel Systems, Tom O'Hanlan, The Digital I/O Handbook clearly explains real-world digital input/output implementation from both a hardware and software perspective. Whether you are a practicing engineer or a student, The Digital I/O Handbook will provide helpful insight you will use again and again.

The Digital I/O Handbook includes:

Description of a wide range of devices including optically isolated inputs, relays, and sensors
Many helpful circuit diagrams and drawings
Includes software code examples
Common problems and solutions
Detailed glossary of common industry terms

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