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LDT-Digital components for Lenz Digital plus model railroads

Within the following listing you can find all products of our company. By activating a particular link you will receive detailed information and the possibility to order the article.

Further overviews about our products:


At the section “Switching” our program offers decoders for the digital format of DCC.

Turnout Decoder

  • S-DEC-4: 4-fold turnout decoder for DCC Digital with a self-learning decoder address. With an external power supply possibility.
  • 1-DEC-DC: 4-fold turnout decoder for LGB-Drive EPL 12010 as well as KATO-, TOMIX- and ROKUHAN-Drives for DCC Digital with a self-learning decoder address.
  • DSU: Permanent-Power-Switch-Unit as accessory for the turnout decoder S-DEC-4 and for the turntable decoder TT-DEC.

Switch Decoder

  • SA-DEC-4: 4-fold switch decoder with 4 bistable relays with each 2 Amp. switching power. With self learning decoder address and external power supply possibility.

Turnout-Decoder for motor driven turnouts

  • M-DEC: 4-fold decoder for motor driven turnouts with self-learning decoder address and external power supply possibility.

Light-Signal Decoder

4-fold Light signal decoder with a self-learning decoder address and external power supply possibility.

  • LS-DEC-DB: Light-Signal Decoder (Deutsche Bundesbahn).
  • LS-DEC-DR: Light-Signal Decoder (Deutsche Reichsbahn).
  • LS-DEC-KS: Light-Signal Decoder (Deutsche Bahn).
  • LS-DEC-ÖBB: Light-Signal Decoder (Austrian Federal Railway).
  • LS-DEC-SBB: Light-Signal Decoder (Swiss Federal Railway).
  • LS-DEC-NS: Light-Signal Decoder (Nederlandse Spoorwegen).
  • LS-DEC-NMBS: Light-Signal Decoder (Nationale Maatschapping of the Belgian Spoorwegen).
  • LS-DEC-BR: Light-Signal Decoder (British Railway).
  • LS-DEC-FS: Light-Signal Decoder (Governmental Railway Corporation of Italy – Ferrovie dello Stato).
  • LS-DEC-SJ: Light-Signal Decoder (Swedish State Railway).
  • LS-DEC-SNCF: Light-Signal Decoder (Governmental Railway Corporation of French - Société Nationale des Chemins de fer Français).
  • LS-DEC-CFL: Light-Signal Decoder (National Railway Company of Luxembourg).
  • LS-DEC-USA: Light-Signal Decoder (for American Color Light Signals).
  • LS-DEC-CSD: Light-Signal Decoder (Czechoslovakian National Railway).
  • LS-DEC-8x2: Light-Signal Decoder (for eight 2-aspect Light Signals).

Adapter for Light-Signal Decoder

  • Adap-LS-A: Adapter for light signal decoder LS-DEC for light signals with incandescent lamps, light signals with incandescent lamps and light emitting diodes with common anodes.
  • Adap-LS-K: Adapter for light signal decoder LS-DEC for light signals with light emitting diodes with common cathodes.

Train Influence Module for Light-Signal Decoder

  • ZBM: 4-fold train influence module for 4 stop sections. Cuts off the driving power supply if signal is on red.


  • TT-DEC-R: The Turntable-Decoder TT-DEC-R is suitable for the digital control of the Roco H0 Turntable 42615.
  • TT-DEC: The Turntable-Decoder TT-DEC is suitable for the digital control of Fleischmann-Turntables 6052, 6152, 6154, 6651, 9152, 6680 (with and without ”C”), 6652 (with 3-rail conductor), the Roco Turntable 35900 and the Märklin-Turntable 7286.
  • DSU: Permanent-Power-Switch-Unit will change the polarity of a 2-conductor turntable bridge at every 180 degree turning of the turntable if combined with the TurnTable-Decoder TT-DEC.


  • WD-DEC: The WatchDog decoder WD-DEC is a watch-dog for your pc supported digital model-train-railroad. If the model railway software has lost the control about the layout, the WD-DEC will switch the tracks free of current via the connected boosters and all trains will be immediately stopped.

Decoder for Switchboard Lights

  • GBS-DEC: The Decoder for Switchboard Lights GBS-DEC supplies current to the light emitting diodes or to the incandescent lamps of the track switchboard panel. The GBS-DEC is available for the digital formats Märklin-Motorola and DCC as well for the s88-feedback bus. The Decoder for Switchboard Lights GBS-DEC consist of a GBS-Master Module, a GBS-Display Module and the GBS-Service Module.
  • s88-ClockMaster: As a supplement to the Switchboard Light-Decoder GBS-DEC to be used without a digital command station or without a PC with model railway software.


For “Feedback” we offer products for the RS-Feedback bus.

RS-feedback bus

  • RS-16-O: 16-fold feedback module with opto isolated inputs for high safety against interference and for potential separation.
  • RS-8: 8-fold feedback module with integrated occupancy detectors for a current load up to 3 Ampere (peak current 7 Ampere).


Our “DigitalBooster DB-2 and DB-4” can be operated on several digital central units. The DigitalBooster supports the digital formats Märklin-Motorola, mfx®, M4 and DCC.

  • DB-2: The short-circuit proofed DigitalBooster DB-2 supplies 2.5 Ampere digital current. Connected to the digital control center via a 5-poles booster bus.
  • DB-4: The DigitalBooster DB-4 provides 2.5 or 4.5 Ampere digital current. With the galvanic separated booster bus connection (5-poles-, CDE- and Roco-booster bus) is it possible to use it on several command stations.

Booster Keep Separate Module

  • BTM-SG: Provides a secure electrical separation of booster current circuits. Suitable for all digital formats, all command stations and boosters.

Reverse-Loop Module

  • KSM-SG: The short circuit protected polarity reversal of the reverse loop will be performed by sensor tracks. Suitable for digital operation (all formats).

High Speed Interfaces

Legal Doping: High Speed Interface for the s88-feedbackbus!
To provide feedback reports fast and without detours via the digital command station to the PC we offer the High Speed Interfaces for the s88-feedback bus within our program. With this option you can install up to 3 s88-feedback lines with up to 496 contacts.

  • HSI-88: High-Speed-Computer-Interface for fast report of s88-feedback modules to the PC via the COM-interface.
  • HSI-88-USB: High-Speed-Computer-Interface for fast report of s88-feedback modules to the PC via the USB-interface (1.1 / 2.0 Full-Speed).
  • Adap-HSI-s88-N: With the Adapter is it possible to connect s88-feedback modules in accordance to s88-N direktly to the interfaces.


  • SB-4: Practical unit for the direct current supply from switched mode mains power supply.


Here you can find e.g. Assembly Material, Casings or Bus cable for our Components.

  • MON-SET: For fitting devices underneath the layout we supply suitable installation material consisting of four spacers each 5mm long and four 13mm screws.
  • LDT-01: The small elegant practical case for several LDT-components. Suitable for: 1-DEC-DC (from version 2), Adap-CDE, Adap-Roco, COL-10, DB-2, DSW-88-N, GBM-8, HSI-88(-USB), KeyCom, KSM-SG, LS-DEC, M-DEC (from version 2), RM-88-N, RM-88-N-O, RS-16-O, s88-CM, S-DEC-4, SA-DEC-4, SB-4, TD-88, TT-DEC(-R), BTM-SG, WD-DEC and ZBM.
  • LDT-02: The big elegant practical case for LDT-components. Suitable for: DB-4, RM-GB-8-N and RS-8 (from version 3.2).
  • Ferrite pearls: For the elimination of disturbance caused by turnouts with integrated end switches.
  • Electronic articles: Electronic articles for Model-Railroader.
  • Electronic Spare Parts: Electronic Spare Parts for LDT-Components.

Subject to technical changes and errors.
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