HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
a.saji
User Rank
Silver
Re: optically isolated relays.
a.saji   6/29/2013 10:25:01 AM
NO RATINGS
@William: Oh ok. Thank you for clarifying it. I had a few issues so I was wondering whether you had the same. 

William K.
User Rank
Gold
Re: optically isolated relays.
William K.   5/31/2013 3:33:53 PM
NO RATINGS
I did not regard any of the situations that I encountered using optical isolated relays as a drawback. They never gave me any problems, with one small exception. A solid state relay that controlled s solenoid valve had one of it's twi anti-parallel SCR devices fail open. So the indicator light would show that the output was active but the valve would not shift. Once I realized that the bulb was at reduced intensity the replacement effort quickly solved the problem.

a.saji
User Rank
Silver
Re: optically isolated relays.
a.saji   5/31/2013 1:17:22 AM
NO RATINGS
@William: Yes true there will be some drawbacks but you cannot expect any without drawbacks for sure. Everything has two sides and so as this.

William K.
User Rank
Gold
optically isolated relays.
William K.   5/30/2013 3:51:15 PM
NO RATINGS
My primary use of the opto-isolated relays has been as a computer interface in industrical test systems. 100,000 hours of on time before a 3% reduction in illumination, and the associated increase in turn-on time would be no problem, since the production lifetime of the product tested may not be that long. And for those very long-life products another few milliseconds of response time would not be a problem either.

The other use of opto-relays is for on-off cycling of heaters in temperature controlled systems, where electrical heater powr is cycled to control temperature. For those applications with the zero-crossing switching the problem is even less likely to be noticed or to cause problems. It might possibly have some effect in motion control systems,but that is a different realm completely.



Partner Zone
Latest Analysis
SpaceX CEO Elon Musk has unveiled the company's plans for a Interplanetary Transport System that would make it possible to create a self-sustaining city on Mars.
Two studies by leading companies show that energy plants are bullish on deploying IoT. They’re using connectivity for planning, productivity gains, and safety.
Proto Labs, known for its super-fast-turn prototyping and low-volume production services with multiple materials and processes, has added another service to its repertoire: rapid overmolding.
Technology has proven over and over again to be tremendously empowering, to individuals and organizations alike. Misuse that power, however, and you might find yourself in big trouble.
Steadfast in its belief that diesel engines are right for the times, General Motors is expanding US availability of the compression-ignited technology in Chevrolet cars and light trucks.
More:Blogs|News
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Oct 10 - 14, Embedded System Design Techniques™: Getting Started Developing Professional Embedded Software
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service