×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

wiring a relay with a prox switch

wiring a relay with a prox switch

wiring a relay with a prox switch

(OP)
how can I do this without buring up the prox switch. I have used prox switches in the past with plcs and have never had any problems. I am trying to control a relay and the prox switches keep burning up. Do I need a different relay? It is a 120 VAC circuit.

RE: wiring a relay with a prox switch

Oh yeah!  Rapidly switching a relay with a proximity switch will cook something.

Can you use an opto-relay for what you're doing?  They automatically provide zero crossing, (or not), if your application would revolt.  You can get them in AC or DC.  They require only about 5mA to switch which unburdens the prox
switch greatly.

Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com

RE: wiring a relay with a prox switch

supersparky:
 You may check the spec's of prox. switch such as voltage suitabilty. How often switching occurs, by the way? If it occurs most often to the extent that exceeds its specified operation, then Itsmoked is right.
  Else, to resolve the issue without replacing new relay, you may try to suppress the surge effect of switching like putting up a diode or a series capacitor-resitor circuit across (parallel) the control relay coil.


"..the more, the merrier" Genghis Khan

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources