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RaptorT

Posted 6/14/2017 09:34 (#6070498)
Subject: Auxiliary power ports available on most tractors

I am an engineer developing a harvest monitor to track crop size on row crop harvesters (currently just potato harvesters), and I would like to know what auxiliary power is available on board the average tractor used for this purpose. Specifically, I need continuous 12 Volt DC power while the tractor is running. Since I'd like it to be usable on all sorts of tractors, I would like to know if anyone here has insight into what would be available on most tractors and if there is a standard plug I would need to access that power (similar to cigarette lighters in cars).
Thank you

DoubleJFarmsWA

Posted 6/14/2017 09:54 (#6070520 - in reply to #6070498)
Subject: RE: Auxiliary power ports available on most tractors

Eastern Washington

On my Case IH and my JD, there is a common power plug, its about 1 inch round, with 3 connectors, ground, 12v hot and, 12v keyed.

Also, most all have cirgrette lighter connections also, but most I'd say are not full time power.

oldbones

Posted 6/14/2017 10:40 (#6070573 - in reply to #6070498)
Subject: RE: Auxiliary power ports available on most tractors

Floyd County, Iowa

I would suggest that you simply supply a male plug end on your unit, and a fused female plug end that the user would wire direct to the battery or an existing plug in the tractor.
Trying to make a power cord that will work with everything can't be done, as most power ports in a cab are being used for other electronics, and vary from unit to unit.
If you read the past posts in this forum, you'll find that most wire direct to the battery for a reliable, steady power supply.
Just my opinion.

WildBuckwheat

Posted 6/14/2017 11:23 (#6070637 - in reply to #6070498)
Subject: RE: Auxiliary power ports available on most tractors

Middlesex County, Ontario

Most brands of tractor have a 3 pin AMP plug somewhere on the side console that provides a ground, battery, and ignition. Usually good for 30 amps.

deeretech14

Posted 6/14/2017 11:33 (#6070656 - in reply to #6070498)
Subject: RE: Auxiliary power ports available on most tractors

SW Ohio

https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwicvP6V4b3UAhUW24MKHe85DuQQjRwIBw&url=https%3A%2F%2Fwww.allpartsstore.com%2FItemDetl.htm%3FItemNumber%3DRE51091&psig=AFQjCNF9FtXd1cLEEbTMLSQzw6X8uibkPQ&ust=1497544171876991

You can find this plug on a lot of tractors 30 years old and newer. 12v switched, unswitched, and ground

Jonb

Posted 6/14/2017 12:15 (#6070729 - in reply to #6070656)
Subject: RE: Auxiliary power ports available on most tractors

central, minnesota

Here's a picture. Probably most common after a cigarette Lighter

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Robert W Greif

Posted 6/14/2017 13:52 (#6070886 - in reply to #6070498)
Subject: RE: Auxiliary power ports available on most tractors

Dallas Center IA 515-720-2463

There are several sold to be installed in equipment.

First off cigarette lighter style deals are not the best, by a long ways.

Second, I wish the industry would come out with one design that everyone used.

One good unit I have seen has three standard AMP power connectors and two cigarette lighter receptacles. Has a on/off switch for switched power and is fused to 30 amps.

I believe it is called the Power Bar. It is in the Ag Express catalog, also pretty sure I have seen it in other companies websites.
Top image.

I like the John Deere Power Strip. There is at least one in every cab equipped tractor I have. Only one of them has yellow wheels.
They have six plugins. Power direct from the battery - unswitched.
And switched.

For any plugin deal, I highly recommend not getting the switched power from the tractor’s key switch.
But using a good quality continuous duty solenoid.
Good heavy wire with fuze from the battery to the solenoid.
Hook the switched power wire from the power strip or power bar to the solenoid.
A wire from the key switch to engage the solenoid.
That way a heavy load will not be passing thru the key switch.

For the un-switched power. A good heavy wire with fuze, from the battery to the strip.

All of my precision farming displays are direct wired to the battery.
But everything else has the power strip plugin. Planter monitors, spray controllers, camera systems, etc.

Top photo is a Power Bar. Not sure of the supplier.
Second is a John Deere Power Strip - This photo could be a aftermarket, not sure.
Third is a plugin for the Deere.

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Mmaxed

Posted 6/14/2017 16:59 (#6071112 - in reply to #6070886)
Subject: RE: Auxiliary power ports available on most tractors

I agree with Robert W. If your equipment is at all picky about power, go direct to the battery one way or another. Pulling power out of the cab will bite you in the butt some day. Been there, done that, got the shirt.

RaptorT

Posted 6/15/2017 09:52 (#6072385 - in reply to #6071112)
Subject: RE: Auxiliary power ports available on most tractors

Yes, this equipment is picky about power. What could go wrong if you draw power out of the cab? I would prefer to go straight to the battery, but I'd still like to know if the cab is even an option.

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