How to Hard Wire a Dcc decoder to loco with a smoke unit

[peter_beckett]

Hi, Can anyone help me please?

I have recently purchased a Triang Britannia with a Smoke generator. works perfectly. my Question is. is there any wiring diagrams inwhich i can use. I know the main wiring procedures. but what wire do i use for the smoke generator.

 

thank you

 

Peter

[mjb1961]

Hi ,,,,,HORNBY r8249 decoders have a trailing purple wire which I think can be used for the smoke generater ,,also ,I believe that some of the wires on the 8 pin plug are for lights ,smoke generators etc ,,,,the only thing that might be a problem is the current the generator needs to operate is will the decoder be able to provide ,,,I'm sure Chrissaf will put you right on this matter ,,,,mjb

[Chrissaf]

There are more posts on this topic on the forum than you can shake a stick at. Use the forum search function and use the word 'smoke' as your search term.

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The main thing to note is that if you use a Hornby branded decoder (except maybe the Sapphire) you will most likely burn it out. Smoke units require a lot of current.

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Brian's site below shows how to use a smoke generator with a decoder that does not have a suitable current rating specification.

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http://www.brian-lambert.co.uk/DCC.html#Units

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Alterntaively, and less onerous to install (compared to Brian's relay solution), use a decoder that is designed for operating smoke units directly.

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Zimo brand decoders have decoder models (for example the MX630 may be suitable) in the range with smoke compatible function current ratings. In an ideal world you need a decoder with functions rated at 200mA or more. The standard Hornby rating is 100mA.

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Zimo Decoder manual. covers multiple decoder models

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Research the specifications of the decoders to find one that is suitable. Any four function decoder with an appropriate function current rating will do. And as others have said, use a function wire for the smoke unit. Typically purple or green.