i dont understand this relay diagram

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=122580
Printed Date: May 10, 2025 at 11:25 PM

Topic: i dont understand this relay diagram

Posted By: blocker7399
Subject: i dont understand this relay diagram
Date Posted: July 08, 2010 at 1:24 PM

can some one please explain why you would use the relay on the right and not just have the momentary switch do the work without the relay posted_image

Replies:

Posted By: the12volt
Date Posted: July 08, 2010 at 1:35 PM

You could, but then you would have to hold the switch continuously while turning the ignition key to start. The idea is to make it inconspicuous.

-------------
posted_image

the12volt • Support the12volt.com

Posted By: blocker7399
Date Posted: July 08, 2010 at 2:07 PM

how does that keep the relay switched when you let off of the switch shouldnt it make the relay change back to the 87a when you let off of the switch

Posted By: the12volt
Date Posted: July 08, 2010 at 2:48 PM

Once the coil of the right relay is activated, terminals 30, 87 and 85 of the right relay have continuity creating a latch until the 12V ignition source is removed (turned off).

-------------
posted_image

the12volt • Support the12volt.com

Posted By: i am an idiot
Date Posted: July 08, 2010 at 4:23 PM

Admin, did you get my e-mail?

Posted By: the12volt
Date Posted: July 08, 2010 at 4:29 PM

Yes. No can do here. If we did, we would have to give everyone free adverstising :| Post it on our facebook page.

-------------
posted_image

the12volt • Support the12volt.com

Posted By: blocker7399
Date Posted: July 08, 2010 at 9:11 PM

thanks i see what i was missing now. because 87 loops back to 85 it causes it to stay open sorry sometimes its the little things you miss

Print Page | Close Window