mini dual polarity switching relay?
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=134604
Printed Date: May 12, 2025 at 2:41 PM
Topic: mini dual polarity switching relay?
Posted By: ace_boy2099
Subject: mini dual polarity switching relay?
Date Posted: July 26, 2013 at 1:16 AM
Does anyone on these forums know if there is such thing as a mini relay type thing that I can use to change the polarity of 2 wires all in 1 little package?
I want to try and switch the polarity of the lock/unlock (2 wires) on my compustar alarm so that they will then be positive and not negative, but I really don't want to have to try and hide a large box with 2 relays in it somewhere.
I don't know if what I am looking for is even in existance but what I am looking for goes something like this:
Common (A&B) 30 & 86 - +12v
85A - Lock (-) from alarm
85B - Unlock (-) from alarm
87a(A&B) - Terminated/Not Used
87A - (+) Lock to truck
87B - (+) Unlock to truck
All in one little convenient piece.
I hope this makes sense to others reading it, and I hope someone can lead me in a direction to find this. Otherwise when I get some more money I'll have to get some relays and make up something bulky I don't really want.
Thanks in advance.
Replies:
Posted By: howie ll
Date Posted: July 26, 2013 at 3:06 AM
Use a DEI 451. Simple and easiest, it's two mini power relays in one casing, or a pair of mini PCB power relays from Radio Shack etc. and glue them together.
If it were available you'd be looking for a 12V dual coil SPCO non-latching relay, not sure if it exists, have a Google through the Omron range
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Read the installation manual, do a search here or online for your vehicle wiring before posting.
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