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Discussion Boards => On30 => Topic started by: tbdanny on August 09, 2017, 04:04:39 PM



Title: 2-4-4-2 Articulated - Connection Pinout?
Post by: tbdanny on August 09, 2017, 04:04:39 PM
Hi all,

I'm in the process of converting one of the Bachmann 2-4-4-2s into a tank engine, and as part of this, I'll need to wire in a new decoder.  However, I'm unable to find a wiring diagram on the Internet.

The model has two plugs - a two pin plug on the right, and a four pin plug on the left.  Can someone please tell me which pin is for which function?


Title: Re: 2-4-4-2 Articulated - Connection Pinout?
Post by: Flare on August 09, 2017, 05:13:44 PM
If you remove the board in the tender, you may find its wires are marked on the other side.

I don't have an articulated, but my other Bachmann On30 locos have been this way.


Title: Re: 2-4-4-2 Articulated - Connection Pinout?
Post by: dutchbuilder on August 10, 2017, 04:31:30 AM
I did the same with a 2-6-6-2.
As you are not going to use the tender forget that wiring.
You will have to do some reverse engineering on the wiring in the locomotive.
It shouldn't be that complicated because you only have six wires.
The standard wire colours from a decoder are black and red for the wheels, orange and grey for the motor and white and blue for the
head light .
You will have to do some measuring because Mr. B is colour blind and not always uses those colours.

Ton



Title: Re: 2-4-4-2 Articulated - Connection Pinout?
Post by: tbdanny on August 10, 2017, 05:46:36 AM
Right.  Time to break out the multimeter, then.


Title: Re: 2-4-4-2 Articulated - Connection Pinout?
Post by: dutchbuilder on August 10, 2017, 02:37:09 PM
Yep.
Don't forget to place a resistor between the decoder and the + for the LED headlight otherwise you release the magic smoke.

Ton


Title: Re: 2-4-4-2 Articulated - Connection Pinout?
Post by: tbdanny on August 11, 2017, 05:19:41 AM
Ton,

No worries.  I usually use a 1K resistor.

As for the pinout, I checked it earlier this evening.  I was able to remove the circuit board from the tender and untangle the wires.  From this, I was able to map the pins on the connectors to the functions, and double-checked them with my multimeter.  The two-pin plug is the power pickup from the driving wheels.  As for the four-pin plug, the pins are as per below:

(https://orig11.deviantart.net/d105/f/2017/223/a/d/24424pinpinout_by_tbdanny-dbjndzt.jpg)


Title: Re: 2-4-4-2 Articulated - Connection Pinout?
Post by: dutchbuilder on August 11, 2017, 06:46:22 AM
It's been a while since i remodelled my articulated but you are absolutely correct.

Ton


Title: Re: 2-4-4-2 Articulated - Connection Pinout?
Post by: tbdanny on August 11, 2017, 07:21:40 AM
Was that the 2-6-6-2 you linked to on that other thread?  That looked fantastic.


Title: Re: 2-4-4-2 Articulated - Connection Pinout?
Post by: dutchbuilder on August 11, 2017, 02:53:38 PM
Yes it was.

Ton