Relay Diagram for Switching Polarity

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=114347
Printed Date: May 01, 2025 at 7:22 AM

Topic: Relay Diagram for Switching Polarity

Posted By: freewheelerrg
Subject: Relay Diagram for Switching Polarity
Date Posted: June 09, 2009 at 10:04 PM

I need help configuring and setting up a relay(s) that will do the following.
My 12 volt motor is normally off. When I push a 2 button remote control I want the first button to make the motor run clockwise. When I push the second button of the remote I want the motor to run counter-clockwise. How would I wire this and what type and how many relays would I need to accomplish this polarity switching?
Thanks in advance.

Replies:

Posted By: i am an idiot
Date Posted: June 09, 2009 at 10:46 PM

Scroll down to the diagram for Actuators/Reverse The 2 wires that are labeled to Actuators should now read to Motor. All other connections are labeled properly for your application.

Posted By: hotwaterwizard
Date Posted: June 11, 2009 at 10:13 PM

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: i am an idiot
Date Posted: June 14, 2009 at 5:19 PM

Most alarm outputs are negative. The above diagram is designed to work with a positive out. Following is the diagram I referenced earlier. It uses a negative output to trigger it.

Posted By: hotwaterwizard
Date Posted: June 14, 2009 at 7:01 PM

Whoopdie Do just switch around a couple of wires.

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: i am an idiot
Date Posted: June 14, 2009 at 7:05 PM

I am pretty sure that if he noticed that there was a problem with the setup, he probably would not have been here asking for help.

Posted By: freewheelerrg
Date Posted: June 15, 2009 at 10:40 AM

Thanks for the info guys, it was very helpful.

Just as an FYI on what I'm trying to do, this setup is for my boat lift. I have a 12 Volt motor that I attached to the lift wheel and to move the lift up and down the motor just has the polarity reversed. I want to be able to install a low volated remote control switch that I can operate from inside my boat while the 12 volt motor draws around 25 to 30 amps, thus the need for a relay.

Posted By: i am an idiot
Date Posted: June 15, 2009 at 1:55 PM

Depending on whether your remote device puts out a negative or a positive voltage, you have a diagram for each. Good Luck and let us know how it works out.

Posted By: hotwaterwizard
Date Posted: June 15, 2009 at 10:35 PM

If you examine the circuits all 3 are basicly the same circuit with different hot and grounds. If you want the switch version here it is.

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !