Handbook of Fiber Optic Data Communication

The world of optical data communication appeared to be already well established, and its technology was a major driving force in the development of computers (both servers and clients), storage, and real-world applications in business, education, transportation, and many other sectors of the economy.


 

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Electromagnetics for High-Speed Analog and Digital Communication Circuits

Modern communications technology demands smaller, faster, and more efficient circuits, the design of which requires a good understanding of circuit theory and electromagnetics. This book reviews the fundamentals of electromagnetism as applied to passive and active circuit elements, highlighting the various effects and potential problems in designing a new circuit.


 

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RS485 & Modbus Protocol Guide

The MODBUS protocol "defines a message structure that controllers will recognize and use, regardless of the type of networks over which they communicate. It describes the process a controller uses to request access to another device, how it will respond to requests from the other devices, and how errors will be detected and reported. It establishes a common format for the layout and contents of message fields." - Modbus Protocol Reference Guide, PI-MBUS-300 Rev. J. This document may be purchased from "Groupe Schneider, Basingstoke, England 44 (0) 1256 843184. There are a number of hardware configurations used for MODBUS networks, this guide will consider only the two wire RS485 network as that is the configuration currently supported by the SPR and Integra family of products.


 

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WIFI HOME NETWORKING

Since then, wireless Ethernet networking has evolved from a niche into a necessity. Affordable Internet access has become widely available to homes and businesses thanks to DSL and cable modems. Laptops have increasingly become a standard tool for doing business. Today's users are more accustomed to having a computer at hand wherever they may be, perhaps literally in hand, with the recent development of PDAs and the steady proliferation of cell phones. Wi-Fi is a logical extension of that. It has brought users ever closer to the data they crave, as our economy and society become more and more information oriented. Wi-Fi has changed the way we do business. It will change the way we live.


 

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Upgrading to Li-ion from Lead Acid

Both the Lithium-ion (Li-ion) and Sealed Lead Acid (SLA) battery markets are expected to grow over the next several years. Applications with high voltage and capacity requirements are adopting Li-ion technology because of its many advantages- especially the high energy density, small size and low weight that this technology provides. Historically, SLA batteries have had a few superior technical traits, in addition to their extremely low cost, that have kept them leading the majority of the overall battery market. However, recent innovations in Li-ion chemistry has made it extremely competitive in markets that are weight sensitive and inconvenienced by SLA's need for frequent maintenance. Many devices have required batteries for power back-up and these are primed for direct Li-ion replacement of SLA. In the medical market alone, these applications include infusion pumps, ventilators, wheelchairs and workstation carts. This paper will outline the technical and business considerations involved in converting an existing product from SLA to Li-ion.


 

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