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power locks relay


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i am an idiot 
Platinum - Posts: 13,666
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: December 30, 2014 at 1:50 PM / IP Logged  
I am real curious to see what the problem was.
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: December 30, 2014 at 1:53 PM / IP Logged  
Will we ever be told?
aronmigz 
Member - Posts: 29
Member spacespace
Joined: December 25, 2014
Location: California, United States
Posted: December 30, 2014 at 3:10 PM / IP Logged  
I checked the relays this morning.. I got 3..1 of em came with the alarm for started disable.. But dont need that.. And that one has 87a labeled on the replay.. The other 2 from oreillys on the packaging says 87a... On the relay only shows 2 87's and the armature per a relay...so i guess i got 2 87s n thats why its blowing fuses on those relays..
But why the hell does the package say 87a but the part ddont have 87a just 2 87s
Aron Migz
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: December 30, 2014 at 3:14 PM / IP Logged  
Test it physically, see if you have continuity at rest between the 87s.
Remember when I posted that line about physically checking?
Also the comment about 87b and 2 X 87?
aronmigz 
Member - Posts: 29
Member spacespace
Joined: December 25, 2014
Location: California, United States
Posted: December 30, 2014 at 3:24 PM / IP Logged  
Whats 87b? is that the second 87??
Ill test it tomorrow... I git work in a few
Aron Migz
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: December 30, 2014 at 3:30 PM / IP Logged  
2 X 87 means they are common I.e. connected, 87b means internal diode separated.
Please read up about relays, this is all too basic as was your original problem, thanks to Mr. I for finding the solution.
i am an idiot 
Platinum - Posts: 13,666
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: January 01, 2015 at 6:01 PM / IP Logged  
Howie, I have never seen or heard of an 87B. Relays with 2 x 87 or 87B or SPST devices. The difference between the 2 are just as you stated, the 2 87s are still both connected when the relay is at rest. The ones with 87B, the 87B is not connected to the 87 when the relay is at rest. I guess if you had an application using 2 other relays to control 2 separate devices, you could parallel the 87 and 87B each with one of the other relays and have a 1 or 2 situation using the 2 relays and using the 87B relay you could have a 1 and 2 with a single input.
So this is what I learned on the first day of the new year. Hopefully the rest of the year will be as educating as the first. Thanks, and Happy New Year everyone.
davep. 
Gold - Posts: 639
Gold spacespace
Joined: May 27, 2011
Location: California, United States
Posted: January 01, 2015 at 9:46 PM / IP Logged  
I hadn't heard of an "87b" either until Howie posted this. And the "diode isolated" was also confusing. So I researched it.
The dual 87 has one armature contact. The two 87's are common to each other internally.
The 87b has two armature contacts. 87 and 87b are isolated until relay is energized. (But there are no diodes involved).
If the OP in this thread had had an 87b relay, he wouldn't have smoked wires and blown fuses until the relay was energized, but his circuit still wouldn't have worked as intended.
I too learned something this first day of the new year. Thanks, and Happy New Year.
power locks relay - Page 7 -- posted image.
power locks relay - Page 7 -- posted image.
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: January 02, 2015 at 4:11 AM / IP Logged  
And I wasn't sure how the 87b worked so I said diode, rather daft really considering up to say 30 amps load.
Seen them originally many years ago when Clifford packed them with early alarms for Euro twin indicator circuits.
I've also seen 4 and 5 pin where the pins are in different configuration.
The whole point of this thread is look!
i am an idiot 
Platinum - Posts: 13,666
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: January 02, 2015 at 7:25 PM / IP Logged  
Excellent application for an 87B device. Light flash on a Beamer.
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