ldt-infocenter S-DEC-4-MM-G Digital Professional 4 Fold Turnout Decoder Instruction Manual
- June 4, 2024
- ldt-infocenter
Table of Contents
Littfinski DatenTechnik (LDT)
Operating Instruction
4-fold turnout decoder
from the Digital-Professional-Series! S-DEC-4-MM-G Part-No.: 910313
(with possible external power supply)
finished module in a case<<
Compatible to Märklin-Motorola-Format:
(e.g. Märklin-Digital [Control Unit, Central Station 1 und 2], Intellibox,
EasyControl, ECoS, KeyCom-MM, DiCoStation, EDiTS, EDiTS pro and others)
For digital control of:
- up to 4 twin-coil magnet accessories (e.g. turnouts or signals).
- up to 8 single-coil magnet accessories (e.g. uncoupling tracks).
- up to 4 permanent power switch units [DSU] (e.g. illumination).
This product is not a toy! Not suitable for children under 14 years of age! The kit contains small parts, which should be kept away from children under 3! Improper use will imply danger of injuring due to sharp edges and tips! Please store this instruction carefully.
The decoder receives the digital information via the clamp KL1. Connect the
clamp with a rail or even better connect the clamp directly to the command
station or to a booster assuring supply of digital information free from any
interference.
Pay attention to the mark at clamp KL1. The color markings ‘Black/Schwarz’ and
‘Red/Rot’ next to the clamp are used for Arnold-Digital (old) and Märklin-
Digital=.
Other systems are using the letters ‘J’ and ‘K’.
If you use the decoder for a Märklin-Digital~ respectively Märklin-Motorola
installation please attend to the colors marks ‘red/rot’ and ‘brown/braun’.
The decoder receives the voltage-supply via the clamp KL2.
The voltage shall be in the range of 12 to 18V~ (alternating voltage output of
a model railway transformer) or 15 to 24Volt = (direct voltage output of an
insulated power supply unit).
Introduction/Safety instruction:
You have purchased the 4-fold turnout decoder S-DEC-4 for your model railway
as finished module in a case.
The S-DEC-4 is a high quality product that is supplied within the assortment
of Littfinski DatenTechnik (LDT).
We wish you having a good time using this product.
The turnout decoder S-DEC-4 of the Digital-Professional-Series can be easily
installed and used on your digital railway.
The decoder S-DEC-4-MM is suitable for Märklin-Digital~ respectively for
Märklin-Motorola digital format.
The decoder S-DEC-4-MM is multi digital and can be installed to the Intellibox
without any problems.
The finished module comes with 24 month warranty.
• Please read the following instructions carefully. Warranty will expire due
to damages caused by disregarding the operating instructions. LDT will also be
not liable for any consequential damages caused by improper use or
installation.
Connecting the decoder to your digital model railway layout:
• Attention: Before starting the installation switch off the drive voltage
by pushing the stop button from the command station or disconnect the main
supply.
Now connect turnouts, signals, uncoupling tracks or the permanent power switch
unit [DSU] to the 3-pole clamp marked 1 to 4.
The common conductor of a double coil (turnout or signal) has to be connected
to the middle clamp of the relevant decoder output clamp. The two remaining
cables mostly marked with red (turnout round) and green (turnout straight)
shall be connected to the clamps marked ‚G‘ and ‚R‘ accordingly.
Programming the decoder address:
To program the decoder address a turnout has to be connected to the output 1 of the decoder.
-
Switch on the power supply of your model railway.
-
Press the programming key S1.
-
The turnout connected to output 1 will move now automatically every 1.5 seconds. This indicates that the decoder is in the programming mode.
-
Switch now one turnout of the group of four assigned to the decoder via the keyboard of the control unit or via a remote control. For programming the decoder address you can also release a turnout switch signal via a personal computer.
Remarks: The decoder addresses for magnet accessories are combined in groups of four. The address 1 to 4 build the first group. The address 5 to 8 build the second group etc. Each S-DEC-4 decoder can be assigned to any of these groups. Which turnout of a group will be activated for the addressing does not matter. -
If the decoder has recognized the assignment correctly the connected turnout will move a little faster. Afterward the movement slows down to the initial 1.5 seconds again. In case the decoder will not recognize the address it could be that the two digital information connections (clamp1) are wrong connected. For testing this, switch the power supply off, exchange the connection on KL1 and start addressing again.
-
Leave the programming mode by pressing the programming key S1 again. The decoder address is now permanently stored but it can be changed at any time by repeating the programming as described above.
-
If you press the first key of the programmed group of keys or you send a switch signal for this turnout from a PC the addressed turnout should move into the called direction either into round or into straight. In case the movement goes the wrong way please exchange the two turnout connection cables at the ‚G‘reen (straight) and ‚R‘ed (round) marked connection clamps of the decoder output 1.
Decoder application:
The below draft provides examples of the multipurpose application of the
decoder S-DEC-4.
Besides the typical application of turnout control the decoder can also be
used for uncoupling tracks and signals.
With our permanent power switch unit [DSU], which is equipped with a bi-stable
relay is it possible to switch lights or other consumers up to 2x 1A digital
on or off.
Further application and circuit examples can be found in the Internet on our
Web-Site (www.ldt-infocenter.com) at the
section downloads.
Please attend to the following:
- All 4 decoder outputs can switch a current of 1 Ampere peak. Modern turnout drives need about 0.25 up to 0.5 Ampere. Older drives which are not free moving or which are dirty need more Ampere. The S-DEC-4 Decoder is protected against overload caused by drives which are not switching off at the end movement. The protector is an automatic fuse which will switch back into normal operation a few seconds after the load current is below maximum value.
- Turnouts with integrated end-switch can create considerable electromagnetic interference. Normally the decoder S-DEC-4 will not be influenced by this interference. In case the decoder will be influenced please check the turnout installation cables. Those cables should not wrap or cross the decoder closely. Install the cables that way that they go straight away from the clamps of the decoder. If limited space requires a bad installation layout and the function of the decoder will be disturbed please disconnect the middle cable of each turnout connection and push about 5 to 10 ferrous pearls onto this cable before connecting to the clamp again.
- These ferrous pearls are available at electronic shops or at LDT with the order code
FP. - Turnout illumination: If you want to have a realistic switching of the turnout lights you can use the LDT permanent power switch unit [DSU] or our switch decoder SA-DEC-4.
Troubleshooting:
What to do if something is not working as described above?
Here some possible functional errors and possible solutions:
-
During programming of the decoder addresses the turnout moves within 1.5 seconds, but does not confirm the programming with faster movement by pressing any key.
• Change cable connections at KL1.
• Interfered digital information at KL1 respectively lost of voltage at the tracks or at the installation! Connect the decoder directly with cables to the digital control unit or to the booster instead to the tracks. Increase the cable diameter for long distances.
• Eventually the clamps have been tightened to strong and therefore the clamps got loose at the soldering to the PC board. Check the soldering connection of the clamps at the lower side of the pc-board and re-solder them if required. -
The programming of the decoder address functions as described, nevertheless, the turnouts will not be activated.
• Interfered digital information on KL1 respectively larger lost of voltage at the tracks or the installation result to unsafe data transfer! Connect the decoder directly to the command station or the booster. Increase the cable diameter of long-distance connection cables.
Made in Europe by
Littfinski DatenTechnik (LDT)
Bühler electronic GmbH
Ulmenstraße 43
15370 Fredersdorf / Germany
Phone: +49 (0) 33439 / 867-0
Internet: www.ldt-infocenter.com
Subject to technical changes and errors. © 02/2022 by LDT Arnold, Digitrax,
Lenz, Märklin, Motorola, Roco and Zimo are registered trade marks.