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My new TRIX 22026 steam loco is equiped with a 21-pin connector for decoder .
The manufacturer sugests TRIX 66839 decoder .
As I have a few of Uhlenbrock 76420 multiprotocol multifuncion decoders , I like to install one of them.
The problem is that I don't know which function ( motor ,front-rear lights, smoke generator etc )of the loco is connected with each pin of loco connector.
Maybe the manual of 66839 has some info.
Is this connector a standar ,meaning that any manufacturer who use it , connect the same function to the same pin ?
Any help ?
Dimitris

Hi all,

This information is taken directly from another topic in this forum on the 21-pin connector:

Welcome to the forum polifimos.

I don't think so, usually the smoke generator is connected to AUX 1, here pin 15. The "ground" usually comes from the metall loco body. If not, pin 16 (orange) can be used as "ground."

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Hallo all,
Pin 15 is smoke function FOR SURE.
After using a multimeter tester and with help of the more detail info from the site ( only German )
http://www.ad-soft.ch............. , that Sander van Wijk suggested,
All pin-function-cable color of the connector in the tender FOR TRIX 22026 steam loco are clear now.
Pin 21 -left wheels power pickup, brown cable loco and tender ( connected also to loco+tender body).
Pin 22 -right wheels power pickup, red cable from loco wheels and black cable from tender wheels both connected to a big (1 Watt ?) resistor that goes to pin 22.
Pins 18 - 19 motor ,blue - green cables.
Pin 7 - rear lights, yellow cable
Pin 8 front lights, yellow cable also.
Pin 16 - front and rear light common , gray from front lights and orange from rear lights.
Pin 15 - smoke generator (Seuth Nr 24) , black cable. The body of it is grounded to the chassis-body of loco.


All the above ( cable color especially) are as checked in the TRIX 22026 steam loco and I don't know if it is the same in all Trix locos equipped with 21-pin connector.

Now I can install my Uhlenbrock 76420 decoder. You will be informed as soon as the test of loco.

Friendly regards and thanks to all again.
Dimitris

[8)]
Hallo Bert,
With Header you mean the pins side or the holes side of the connector ?
I'll try to messure mine as acurate as possible and send you the dimenions.
The only dificult part is the distance between the pins or centers of holes. It's to small.
Anyway I'll ask this days in my lokal market for such connectors and if I'll find something i'll inform you.
Dimitris

I must say
21 pins connector is becoming a standard.
There is a roco 21 pins decoder. There is also a Uhlenbrock 21 pins decoder .ESU decoder of course!
Kuehn or TAMS has also announced a 21 pins decoder( don't remember which one of those manufacturers)

Liliput has announced next Loks will be implemented with 21 pins connector...

Never mind,

I found the info I needed. The pitch of the pins is 50 mil or 1.27mm. It is a standard and easily available.

Bert

See here:
http://www.nmra.org/stan...topics.html#Topic0504023

topic 0504023

coordinating Reinhard Mueller (fom FREMO),a TN(technical Note) has to be published- see NMRA organization about "Mandatory" - "RP's Recommended Practises-TN's etc...)

My mtc-21 PCBs just arrived, I will post a picture of them later on when I have assembled the connectors.

Bert

Ah! Are you going to sell these? Because if you do, I will get two for now, and definitely more in the future.

Of course, price is a factor !

Anyway, can you elaborate on its features:

1 - Is AUX1 always direction dependent, or can one bypass that?

2 - What's the current rating for AUX3 and AUX4, after amplification?

3 - Considering there are next to none decoders with AUX3 and AUX4 in the market and absolutely none with 21-pole plug AND AUX3/AUX4, can one reroute AUX1 and AUX2 to the amplifier circuits instead? That would be of more practical use now.

BTW, if the price is right, maybe even some dealers will carry your product....

Luis

The idea was to keep some for my own use and that of a collegue who collaborated in this project (30), and sell the rest to a local dealer (70).
I cannot give an exact price because we don't know yet how much we will charge the dealer (and how much he will then charge his customers). I can tell you however that the PCB is not the big cost, but the components are, especially the 21 pin connector is relatively expensive.
Maybe after this batch is sold (and tested!) I will make a new one, exclusively for users of this site. I can also reverse the question: how much would you be willing to pay for a PCB like this, and should all necessary components for assembly be included?

There is also a (small) downside on this PCB, you need to have some good soldering skills/equipement before attempting to assemble it. It has some 0603 parts and for the ICs some flux is nice.


You can bypass that by soldering 0R resistors on the right places.


Uhm... plenty . I think it depends more on the total power the decoder is able to deliver than on the functions themselves. The mosfets used can deliver up to 2.4Amps continuous power.


This adapter is tailored for ESU type decoders. In my experience they have already an amplified AUX1 and AUX2 onboard, and just TTL logic outputs for AUX3 and AUX4. Thus it makes no sense I think to amplify AUX1/2. You can bypass amplification of the AUX3/4 in case new decoders come out that have 4 fully functional AUX outputs. With function mapping you should also be able to switch AUX3/4 with F1/2 if you like.

Bert

Thank you Bert.


To give you some reference,the HAG board costs 21CHF aprox. 14Euros.

Kind regards
Guus

Once again very impressive, Bert.

Thanks

Kind regards
Guus

I used the pcb from the V160 (AUX1, AUX2, no additional amplifiers) for €4.81, and the one from the BR03 (AUX1, AUX2, additional AUX4 amplifier) as Lutz mentioned, for €7.06
Thanks for suggesting #611868, Lutz!

I had only 5[:(]

Very nice Bert!
Congratulations!
BTW, I have read somewhere that the 21 connector is already existing in industry . IT's the reason why ESU&Marklin have choosen it. As a current connector it was cheaper for them,instead of developping a new one.

I would like to upgrade some of my locos (mainly DC conversion wity NEM 652 pin) to the lokPilot mfx. Any experience? Would it be easy to program/control with the CS? My intention is to leave rarely used locos on the lokPilot 3.0 that I have and only upgrade the heavy usage ones. I am exceeding the 80 addresses any way so I should only look at mfx from now on.

Thanks

Hi Mark, I actually missed your question before. Well it works . Final testing is OK, I use the PCBs in a lot of locos now (mostly with lokpilot 3.0s, 2 with loksounds).

Downside is that it takes some space (pcb should be 0.8mm thick in place of 1.6mm), and the inductor placement is not possible in combination with mtc21 decoders.

I also discovered that only lokpilots have 4 aux function outputs, that you can amplify with my PCB. Loksounds have just 2.

I can sell a few to assemble/solder yourself, but you need to have the correct tools to do that.

Bert