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mini dual polarity switching relay?


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ace_boy2099 
Copper - Posts: 81
Copper spacespace
Joined: January 13, 2010
Location: Florida, United States
Posted: July 26, 2013 at 1:16 AM / IP Logged  
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.
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: July 26, 2013 at 3:06 AM / IP Logged  
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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