Jump to content
Site problems resolved ×
C4 Forums | Control4
  • 0

Dry Contact.


ILoveControl

Question

Hi all,

Just want to check something. With a dry contact the manual says to use 12+ and Sig for a dry contact (simple open close). I am using those connections and the binding is to the right contact sensor. 

I have done the following:

  1. Tested opening and closing the gate - sensors are perfectly aligned. - Stays closed if I pull the contacts apart stays closed.
  2. Replaced the dry contact - same as above (outcome)
  3. Tested swapping 12+ and SIG incase I got the wiring wrong way round same as point 1 (outcome)
  4. Tested continuity on each wire making sure the wire is not broken somewhere - there is continuity 

It is quite a long run of wire normal thin single core alarm type wire. 

 

Have I missed something here?

Link to comment
Share on other sites

4 answers to this question

Recommended Posts

  • 0

On what device? Make sure you're not just looking at the print on the block, but also on the controller, so you're not accidentally connected to a relay...

-Test sensor inputs with a piece of local wire that you can just jumper sig to +12v and check reading, then cut wire and see what it says.

 

You say there's continuity....is there continuity across when the contact is open? Because there shouldn't be....continuity means there's a path for power to go through, if with the contact open or better yet for testing disconnected, there should NOT be a path, meaning there's a short somewhere.

 

I don't think the wire length is an issue in this scenario, as you keep reading closed - if you're reading open all the time, there could be too much voltage drop.

Link to comment
Share on other sites


  • 0

Thank you very much for the explanation. So what I did as a test is wired up right next to the EA5 the same contact on 12 and SIG. It worked as expected. 

When I put the block into the EA5 it shows closed and when I pull the block out shows open. So it's "working" on signal break.

Even though the wire is shielded and I am using the other pair as a relay to open and close the gate, there must be a nick somewhere on the wire on its 30m run. 

There is either interference or there is a short somewhere. Fun job figuring this one out now...

Link to comment
Share on other sites

  • 0

Your distance won't be an issue - I have a beam sensor at the end of about 90mtrs or security cable.

The 12v - Sig works find for me at this distance.

take the wire out of the controller, hook up a LV poser supply and check voltage at the gate end - easy way to see if the wire is ok.

 

Link to comment
Share on other sites

This thread is quite old. Please consider starting a new thread rather than reviving this one.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Answer this question...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.