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help me read relay schematic


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briandors 
Member - Posts: 45
Member spacespace
Joined: August 29, 2003
Location: United States
Posted: October 16, 2004 at 7:52 AM / IP Logged  

This is the schematic:

http://vorlon.cwru.edu/~dors/NegDisarm.jpg

My questions are, does 87A get connected anywhere?  Doesn't seem like it.  And then, do I have to make a connection between 85 and 86 or is that just something internal to the relay?

Thanks!

brian

drivesafe 
Member - Posts: 3
Member spacespace
Joined: October 14, 2004
Location: Australia
Posted: October 16, 2004 at 8:52 AM / IP Logged  
Hi briandors, the diagram you have shows a changeover type relay.
You could use that type or a horn relay or a headlight relay.
All would do the job at hand.
As for pin 87a, just ignore it, it is not required for anything.
The connection between pins 85 and 86 are internal and are the schematic drawing’s way of showing that they make up the connections for the coil side of the relay.
Hope this helps, cheers.
2002 HSE Range Rover Down Under
Velocity Motors 
Moderator - Posts: 12,488
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
Posted: October 16, 2004 at 9:14 AM / IP Logged  

This is a basic (-) to (-) relay configuration.

Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
vancouverbc 
Copper - Posts: 72
Copper spacespace
Joined: September 27, 2004
Location: Canada
Posted: October 18, 2004 at 2:36 PM / IP Logged  
https://www.the12volt.com/relays/relays.asp
1991 240sx
alarm=model 2620.web central door locking system

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