LGB 55029 Retrofit Sound Decoder

This decoder can be used for digital operation (DCC, mfx) as well as in analog operation (DC). All LGB locomotives and powered rail cars produced starting in 2014 with the 27-pin interface can thereby be converted. Many units with the old 10-pin interface can be converted using the 55529 interface adapter. Units without an interface can be converted using the interface circuit board included with this decoder. Size of the interface circuit board approximately 65 x 40 mm / 2-1/2" x 1-9/16".
A speaker box is also included, but other speakers with compatible electrical values can also be connected.
Compared to the previous decoder the performance data have been clearly increased and furthermore this decoder offers considerably more functions and programming options. The decoder can be programmed easily with the Märklin Decoder Tool (https://www.maerklin.de/de/service/downloads/neu-nachruest-decoder-mld3msd3/mdecodertool-mdt3/) and can be adapted to individual requirements. Using the Internet, the option exists for access to the extensive sound library that has been expanded specially by a large number of well-known LGB models and that is constantly being expanded.

Technical Data:
- Total load max. 10 amps, motor output > 4 amps
- Audio performance (sound) 6.7 watts / 4 Ohms
- Locomotive address can be programmed 1-10239
- 14 or 28 (128) speed levels
- Load control can be adapted to analog and digital on different types of locomotives
- Parallel control for all light and function outputs
- Programmable blinking light and short term functions
These and other functions can be programmed with the Märklin CS 2 and CS 3 central units as well as the Märklin Mobile Station.

Additional Product Details

  • Decoder
  • LGB
  • Digital
  • Brand New Item

Meet Chalk Garden Rail

Events we are attending this year.
Date Show
25th January 2026 G Scale Kent Group Winter Indoor Meet and AGM
Teynham Village Hall, Kent, ME9 9TU
28th February, 1st March 2026 Midlands Garden Rail Show
Warwickshire Event Centre, The Fosse, Leamington Spa, CV31 1FE
8th March 2026 Surrey G Scale Annual Indoor Meet
East Horsley Village Hall, Kingston Avenue, Surrey, KT24 6QT
25th April 2026 National Garden Railway Show
NAEC Stoneleigh Park, Kenilworth, CV8 2LH
6th June 2026 Llangollen Garden Railway Festival
Llangollen Pavilion, Abbey Road, Llangollen, LL20 8SW
18th,19th July 2026 Chatham and District Model Railway Show
The Historic Dockyard, Chatham, Kent, ME4 4TY
24th October 2026 Exeter Garden Railway Show
The Matford Centre, Matford Park Road, Marsh Barton Ind Estate, Exeter, EX2 8FD
15th November 2026 Solent G Scale Show
Wickham Community Centre, Mill Lane, Wickham, Fareham, PO17 5AL