new to relays,need wiring tips

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=113542
Printed Date: May 14, 2025 at 2:22 PM

Topic: new to relays,need wiring tips

Posted By: csb41502
Subject: new to relays,need wiring tips
Date Posted: May 01, 2009 at 9:07 PM

i havent used relays too much so i cant get the grasp down on them.does everything basically get hooked up the same.85 most of the time goes to ground?87 is mostly 12v power,or is every situation different.i would really appreciate any wiring tips,diagrams,etc.thanks

Replies:

Posted By: i am an idiot
Date Posted: May 01, 2009 at 9:20 PM

85 and 86 are the low current coil connections of the relay. Power to 86 and ground to 85 energizes the relay. With no voltage on 86 or no ground on 85, the relay is at rest. At rest, terminal 30 (the common connection) is connected to terminal 87a (the normally closed connection). When the relay is energized terminal 30 is now connected to terminal 87 (the normally Open connection).
Read this page
And This

Posted By: csb41502
Date Posted: May 04, 2009 at 7:58 AM

thanks for the links.lots of very useful info

Print Page | Close Window