×
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

Looking for some hardware.

Looking for some hardware.

Looking for some hardware.

(OP)
I am looking for a Interface panel. I need to punch in a password and the unit to give me an output.120 VAC would be nice but can be different.All the ones I could find are ether very pricy or are more complex than I require.Thanks

RE: Looking for some hardware.

Your spec is awfully vague and subjective: what is 'very pricey' and 'more complex'? How much do you plan to spend and how much intelligence do you require?

How about a coded door entry system designed for a remotely actuated striker plate? One of those would definitely switch 12V DC (maybe 24V DC?) at a level adequate to drive a mains relay or contactor. Have a look at http://www.essonline.co.uk/accesscontrol.html and scroll down to the K42 Single Door Codelock for an example. I'm not recommending this particular one, it's just an example I turned up on Google.
 

----------------------------------
  Sometimes I only open my mouth to swap feet...

RE: Looking for some hardware.

(OP)
Sorry ScottyUK I need to have a touch pad to punch a password to access some controls.Are plant is all on control logix 5000 but a old loading chute(Hyd tank and two divertors) are not on  
a PLC.There is no need for one but they would like to have it password protected, I thought I would wire the pad to the MCR
so if the MCR isn't energised there wouldn't be any control power.

RE: Looking for some hardware.

If you wire the little critter I referenced above wired with its relay in place of the 'start' button of a two button starter (e.g. a standard NVR motor starter) then it would work just fine. You'd probably need an interposing relay if the starter uses 120V or higher. The 'stop' button would behave as normal.
 

----------------------------------
  Sometimes I only open my mouth to swap feet...

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