HighBeam Research - Newspaper archives and journal articles
Options
Cancel changes
Follow us:
  • Subscription benefits
  • Log in
  • Sign up for a free, 7-day trial
  • Publications
  • Research topics
  • Topics home
  • People
    • Artists and Entertainers
    • Company executives
    • Historical figures
    • Politicians and Government officials
    • World Leaders
  • Issues and Events
    • Health and Medicine
    • Historical Events
    • Religion and Theology
    • Science and Technology
  • Places
  • Organizations
  • A-Z
    • A-G
    • H-O
    • P-T
    • U-Z
    • 0-9
  • Publications home
  • Journals
    • Academic journals
    • Business journals
    • Education journals
    • Math and Engineering journals
    • Medical journals
    • Science and Technology journals
    • Trade journals
  • Magazines
    • Business magazines
    • Computer magazines
    • Education magazines
    • Industry magazines
    • Lifestyle magazines
    • Medical magazines
  • Newspapers
    • International newspapers and newswires
    • Reports, newsletters, and transcripts
    • U.K. newspapers
    • U.S. newspapers and newswires
  • Reference works and books
    • Almanacs
    • Dictionaries and thesauruses
    • Encyclopedias
    • Non-fiction books
  • Subscription benefits
  • Log in
  • PUBLICATIONS HOME
  • Journals
    • Academic journals
    • Business journals
    • Education journals
    • Math and Engineering journals
    • Medical journals
    • Science and Technology journals
    • Trade journals
  • Magazines
    • Business magazines
    • Computer magazines
    • Education magazines
    • Industry magazines
    • Lifestyle magazines
    • Medical magazines
  • Newspapers
    • International newspapers and newswires
    • Reports, newsletters, and transcripts
    • U.K. newspapers
    • U.S. newspapers and newswires
  • Reference works and books
    • Almanacs
    • Dictionaries and thesauruses
    • Encyclopedias
    • Non-fiction books
Home » Publications » Industry magazines » Engineering magazines » EDN Asia » September 2005 »
  • Save
    This article has been saved!
    You may organize and add notes about this article below.
    This article has been saved!
    View all saved articles
  • Export

    To export this article to Microsoft Word, please log in or subscribe.

    Have an account? Please log in

    Not a subscriber? Sign up today

  • Print
  • Cite

    MLA

    Vaughan, Peter. "PoE problem to ponder.(POWER puzzler #6)." EDN Asia. Canon Communications L.L.C. 2005. HighBeam Research. 22 Apr. 2018 <https://www.highbeam.com>.

    Chicago

    Vaughan, Peter. "PoE problem to ponder.(POWER puzzler #6)." EDN Asia. 2005. HighBeam Research. (April 22, 2018). https://www.highbeam.com/doc/1G1-136709559.html

    APA

    Vaughan, Peter. "PoE problem to ponder.(POWER puzzler #6)." EDN Asia. Canon Communications L.L.C. 2005. Retrieved April 22, 2018 from HighBeam Research: https://www.highbeam.com/doc/1G1-136709559.html

    Please use HighBeam citations as a starting point only. Not all required citation information is available for every article, and citation requirements change over time.

PoE problem to ponder.(POWER puzzler #6)

EDN Asia
EDN Asia

See all results for this publication

Browse back issues of this publication by date

September 1, 2005 | Vaughan, Peter | Copyright
COPYRIGHT 2009 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights or concerns about this content should be directed to Customer Service.
  • Permalink

    Create a link to this page

    Copy and paste this link tag into your Web page or blog:

    <a href="https://www.highbeam.com/doc/1G1-136709559.html" title="PoE problem to ponder.(POWER puzzler #6) | HighBeam Research">PoE problem to ponder.(POWER puzzler #6)</a>

Test your power supply design knowledge as it pertains to Power over Ethernet by trying your hand at answering the three questions below. Check your answers at www.powerint.com/puzzler6 and enter for a chance to win a new Apple iPod Mini.

The schematic below shows a typical Flyback PoE power supply built with a DPA-Switch[R] power conversion IC and a discrete PoE interface circuit for detection and Class 0 classification per IEEE 802.3af.

[ILLUSTRATION OMITTED]

Question 1: beginner

The PD (Powered Device) detection specification requires the PD to present an impedance of between 19 k[ohm] and 26.5 k[ohm] at input voltages between 2 VDC and 10 VDC. …


To read the full text of this article and others like it, subscribe today!



Related articles on HighBeam Research

Product Design & Development
Gas flow meter.(PD&D Exclusive)

Product Design & Development; October 1, 2005

594 words
The new M180 gas flow meter with built-in Vortab flow conditioning is designed to provide accurate flow measurement of natural gas fueled plant compressor units and to ensure that they operate efficiently at the lowest cost. In space limited skids, crowded process, or manufacturing operations the…
Product Design & Development
Digital testers.(PD&D EXCLUSIVE)

Product Design & Development; August 1, 2005

298 words
The 4136mO and the 4137mO are digital milliohm testers. The 4136mO has a power source of 110 or 230 Vac and the 4137mO has a power source of 12 Vdc. These testers are engineered for measuring low ohms to detect any high potential lead junction resistance in compression or solder joints. They can be…
Product Design & Development
Latching solenoid valves.(PD&D Exclusive)

Product Design & Development; September 1, 2005

336 words
These new 10- and 15-mm latching solenoid valves are suitable for applications where low power consumption is required or coil heating is unwanted. The latching feature eliminates the need for continuous power to maintain the position of these direct acting two-way and three-way valves. The 15-mm…
Product Design & Development
Fuseholder-style circuit breaker.(PD&D Exclusive)

Product Design & Development; January 1, 2005

385 words
The T9 Series circuit breaker is equipped with features such as a fuseholder body style, snap-in mounting (5/8 in. or 16 mm diameter hole), and a push-to-reset button. Its tripping operation is (cycling) trip-free. Fuseholder-style circuit breakers are suitable substitutes for panel fuses where…
Product Design & Development
Emergency stop switch.(PD&D Exclusive)

Product Design & Development; May 1, 2005

428 words
An EN418-rated emergency stop switch has been added to the Series 84 range of products. This new switch has been designed for optimal functionality and usability throughout assembly, mounting, and operation. It has a small behind-panel depth, "fool-proof" mono-block design, and bright LED…
See all related articles »

Publication Finder

Browse back issues from our extensive library of more than 6,500 trusted publications.

Popular publicationson HighBeam Research

Daily Mail (London)
U.K. newspapers
The Nation
Political magazines
The Economist (US)
Political magazines
Harper's Magazine
Cultural magazines
The Christian Science Monitor
Religious magazines
Visit Cengage Brain
  • Company
  • About us
  • Subscription benefits
  • Group subscriptions
  • Careers
  • Privacy policy
  • Terms and conditions
  • Contact us
  • Help topics
  • FAQ
  • Search tips
  • Using the Research Center
  • Billing questions
  • Rights inquiries
  • Customer Service
  • Cengage Learning Network
  • Questia
  • CengageBrain.com
  • HighBeam Business
  • ed2go
  • MiLadyPro
  •  
HighBeam Research
Follow us:

HighBeam Research is operated by Cengage Learning. © Copyright 2018. All rights reserved.

The HighBeam advertising network includes: womensforum.com GlamFamily