July 2003 . Volume 2 . Issue 5
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:

Sealevel Expands PC/104 Choices with Three New Boards Including Serial, Digital, and Analog I/O
Designed to meet the core needs of PC/104 applications requiring high reliability, small size, and long term availability, all Sealevel PC/104 products are available in both standard and extended temperature range models (-40°C to +85°C).

Four Port Software-selectable RS-232/422/485
The C4-104.ULTRA, part number 3540, is the first four port multi-interface PC/104 serial I/O card that allows the user to select the desired interface via software. RS-232, RS-422, or RS-485 modes may be selected independently for each of the four ports using simple software commands, eliminating the need for setting jumpers or DIP-switches on the board. The board is designed using the XR16C864 UART, which provides a 128-byte FIFO, 16 times larger than boards designed with 16C550 compatible parts. The larger buffers allow error free operation even in high-speed applications. Additionally, the C4-104.ULTRA allows RS-485 network termination, critical to robust multi-drop communication, to be selectively added to the circuit via a software command.

For more information please visit: http://www.sealevel.com/news.asp?news_id=16


Analog/Digital Multi-function
The AIO-104+8, part number 3820, is the company’s first PC/104 module offering analog I/O. Designed using the Maxim MAX197 successive approximation-type A/D chip, the AIO-104+8 provides eight single-ended 12-bit inputs. Additionally, two 12-bit D/A output channels and 16 TTL digital I/O bits, which can be individually programmed as input or output, are included. Offering impressive functionality in a small, rugged form-factor, the AIO-104+8 is a perfect solution for a variety of PC/104-based data acquisition/control and test/measurement applications.

The AIO-104+8’s A/D inputs are software selectable for 0-5V, 0-10V, +/-5V, and +/-10V ranges and can be configured via hardware for measuring 4–20mA current loop. The inputs feature 5MHz bandwidth track/hold and 100K bps throughput rate. The two 12-bit D/A channels are jumper selectable for 4.095V or 2.048V full-scale. Software support for the AIO-104+8 is provided for easy implementation using either Win32 library calls or a drop-in ActiveX control.

For more information please visit: http://www.sealevel.com/news.asp?news_id=17

Reed Relay Output, Optically Isolated Input
Sealevel announces part number 3730, the DIO-32.104, a 16 input/16 output digital I/O interface for PC/104 bus. The board combines 16 optically isolated inputs and 16 Reed relay outputs, providing an easy, cost-effective way to add real-world control and monitoring capabilities to the PC/104 stack. Optically isolated inputs serve a vital role in eliminating equipment damage caused by line spikes and surges present in industrial environments. The DIO-32.104 is compatible with 2-24VAC or DC inputs and offers 400VDC isolation. The 16 Reed relay channels provide long life, dry contact switch closures that are well suited for low current applications. Each output is rated for up to 10W operation and allows non-destructive software readback.

For more information please visit: http://www.sealevel.com/news.asp?news_id=18


Sealevel Application Notebook
Sealink USB to serial products provide high throughput with low host-processor overhead

SeaLINK USB to Serial

SeaLINK USB to serial converters are based on a State Machine architecture that reduces host processor overhead compared to traditional processor/UART-based designs. Whether you require 1 port or 8, SeaLINK devices are the easiest way to communicate with serial devices via USB. (See figure)

For more information on Sealevel USB to serial products please visit this link: http://www.sealevel.com/products.asp?bus_id=5

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