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identifying relay pins


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juavos00 
Copper - Posts: 66
Copper spacespace
Joined: August 05, 2003
Location: Texas, United States
Posted: April 17, 2010 at 5:18 PM / IP Logged  

First off sorry for the crappy paint drawing, but thats as good as I could do. Anyway I need help identifying the pins on this relay. (85,86,87,87a,30) Thanks

identifying relay pins -- posted image.

t&t tech 
Platinum - Posts: 2,608
Platinum spacespace
Joined: October 05, 2008
Location: Trinidad and Tobago
Posted: April 17, 2010 at 5:27 PM / IP Logged  

85- Negative side of relay coil*

86- Positive side of relay coil*

30- Common terminal of relay,

87a- Normally closed terminal (closed to pin 30 when relay is inactive, and open when active)

87- Normally open pin, (open when inactive, closed to pin 30 when relay is active)

*Applying power and ground to the respective termnal activates the relay!

commit your way to jehovah and he will act in your behalf. psalms 37:5
t&t tech 
Platinum - Posts: 2,608
Platinum spacespace
Joined: October 05, 2008
Location: Trinidad and Tobago
Posted: April 17, 2010 at 5:29 PM / IP Logged  

In the diagram you have however

Pins 1 and 2 would be the coil

pin 3 is common, 4 is normally closed and 5 normally open!

commit your way to jehovah and he will act in your behalf. psalms 37:5
juavos00 
Copper - Posts: 66
Copper spacespace
Joined: August 05, 2003
Location: Texas, United States
Posted: April 17, 2010 at 5:30 PM / IP Logged  

thanks for the reply, but that doesn't help me much. I know about what each pin does, but that is why I drew the picture with the numbers on them hoping someone would say.. 1 = 85 2 = 86, so forth and so on.

Also does it matter if the positive and negative are switched?

juavos00 
Copper - Posts: 66
Copper spacespace
Joined: August 05, 2003
Location: Texas, United States
Posted: April 17, 2010 at 5:31 PM / IP Logged  

sorry couldnt post before you answered my question..

But does the positive and negative matter?

oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: April 17, 2010 at 7:30 PM / IP Logged  
Not in this case - you relay uses a resistor across the coil (not a diode to quench the coil spark).
i am an idiot 
Platinum - Posts: 13,667
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: April 17, 2010 at 9:09 PM / IP Logged  

1 = 85

2 = 86

3 = 30

4 =87A

5 = 87

howie ll 
Pot Metal - Posts: 16,466
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Joined: January 09, 2007
Location: United Kingdom
Posted: April 18, 2010 at 12:21 PM / IP Logged  
I think that relay is Italian, the convention is pin 1 (85 on the ISO listing) is normally the neg. side of the coil.
t&t tech 
Platinum - Posts: 2,608
Platinum spacespace
Joined: October 05, 2008
Location: Trinidad and Tobago
Posted: April 18, 2010 at 3:25 PM / IP Logged  
My bad!  You should have explained yourself better!
commit your way to jehovah and he will act in your behalf. psalms 37:5
juavos00 
Copper - Posts: 66
Copper spacespace
Joined: August 05, 2003
Location: Texas, United States
Posted: April 18, 2010 at 8:03 PM / IP Logged  
I have wired in my relay thanks to all of your help.. Mods can you please lock and/or delete this thread. Thanks

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