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Littfinski DatenTechnik (LDT)
Kleiner Ring 9 • D-25492 Heist/Germany • Phone: 0049 4122 / 977 381 • Fax: 0049 4122 / 977 382
Sample Connections:
TWIN-CENTER from Fleischmann
The TWIN-CENTER transmits the Fleischmann owned FMZ-Format as well as the standardized
DCC-Format to the Lok- or accessory-decoder. This enables the control-unit to respond to LDTDecoders for the DCC-format.
The TWIN-CENTER provides the s88-feedback bus for feedback of events from the tracks.
The LDT-Feedback Modules RM-DEC-88 and RM-DEC-88-Opto (both for quick-action
switches) and RM-GB-8 (for track occupancy reports) can communicate with the TWINCENTER without any problems.
On the next pages you will find some recommendations and sample connections of the TWINCENTER connected to LDT components.
1. Supply tracks with digital current:
The rail connectors within a layout provide a considerable high transition resistance for the digital
current. At a distance of 4 meters from the feeding connection the digital current can be eventually
reduced to such a low value that the Lokdecoder receives no useable information anymore.
schwarz
black
violett
violet
violett/weiß
violet/white
Vom Modellbahntrafo
From transformer
gelb
yellow
FLEISCHMANN
TWIN-CENTER
Via a separate main ring with several supply connections the digital-current supply to the rails
will be optimized.
Littfinski DatenTechnik (LDT) Address
Internet / e-mail
Kleiner Ring 9
http://www.ldt-infocenter.com D-25492 Heist/Germany
info@ldt-infocenter.com
1
Phone
0049 4122 / 977 381
Fax
0049 4122 / 977 382
Banking connection
Kreissparkasse Suedholstein
(bank code 230 510 30)
Account-No. 3 99 43 57
Littfinski DatenTechnik (LDT)
Kleiner Ring 9 • D-25492 Heist/Germany • Phone: 0049 4122 / 977 381 • Fax: 0049 4122 / 977 382
Therefore you should plan a main-ring-supply for the digital current. The wires should have 1mm²
at a minimum. About every 2 meters one supply connection to the rail should be provided.
2. Using the LDT Accessory Decoder:
LDT offers various accessory decoder for the DCC-Data format. Those are suitable for the use
on TWIN-CENTER of Fleischmann.
Under the expression S-DEC-4-DC we offer a Turnout-Decoder for the switching of single- and
twin-coil magnetic accessories such as turnouts, signals or un-coupling tracks.
You can purchase by us the Switch-Decoder (SA-DEC-4-DC) for digital switching illuminations
on and off or switching track sections current-free e.g. at a hidden siding or in front of “red”
signals.
G 3 R
G 4 R
S1
Black
K
KL1
Red
J
red brown
Digital-Profi werden!
violett
violet
Magnetartikel-Decoder
S-DEC-4-DC
violett/weiß
violet/white
Für 4 Doppelspulenantriebe für NMRA DCC
Digitalsysteme. Schaltstrom: 1 Ampere pro
Ausgang.
Littfinski DatenTechnik
D-25492 Heist
Multi-Digital
www.ldt-infocenter.com
KL2
schwarz
black
4fach Weichendecoder
Accessory Decoder
~ ~
14 .. 18V
S-DEC-4
Rev. 2.1
Littfinski DatenTechnik (LDT)
G 1 R
G 2 R
Vom Modellbahntrafo
From transformer
gelb
yellow
FLEISCHMANN
TWIN-CENTER
Turnout-Decoder S-DEC-4-DC for switching turnouts or signals with twin-coil drives.
Littfinski DatenTechnik (LDT) Address
Internet / e-mail
Kleiner Ring 9
http://www.ldt-infocenter.com D-25492 Heist/Germany
info@ldt-infocenter.com
2
Phone
0049 4122 / 977 381
Fax
0049 4122 / 977 382
Banking connection
Kreissparkasse Suedholstein
(bank code 230 510 30)
Account-No. 3 99 43 57
Littfinski DatenTechnik (LDT)
Kleiner Ring 9 • D-25492 Heist/Germany • Phone: 0049 4122 / 977 381 • Fax: 0049 4122 / 977 382
Further we supply a decoder (M-DEC-DC) for motorized turnout drives within our program. If
you intend a digital and exemplary switching of light signals on your layout you can use our Light
Signal-Decoder LS-DEC.
Further detailed information to the different decoder and their operation within the layout can be
found on our LDT Web-Site (www.ldt-infocenter.com) at the section “Downloads”. There are all
Operation-Instructions and further information such as Sample-Connections available.
On the connection plan (last page) we extended the layout by a Turnout-Decoder S-DEC-4-DC
which can digital switch both turnouts.
To assure that the current required for switching the turnouts will not charge the digital current
circuit, the decoder S-DEC-4-DC will get the supply from an external AC-output of a
transformer (as the TWIN-CENTER as well). This saves expensive digital current. All our
decoder offer this convenient possibility.
As shown at the connection plan, the digital voltage required for the decoder will be directly
supplied from the TWIN-CENTER. For this purpose you should assemble a second main ring
supply below your layout for the supply of all accessory decoder with digital information from the
TWIN-CENTER. As the digital information at the rails can be considerable disturbed by travelling
vehicles the use of this information by a direct connection to the rail should be avoided.
2.1 Recommendation for operating LDT-Decoder on TWIN-CENTER:
2.1.1. Registration of DCC Decoder on TWIN-CENTER
As per factory adjustment the TWIN-CENTER transmit FMZ-data to the decoder. To operate the
LDT-Decoder the respective addresses have to be changed to DCC.
This operation is described within the TWIN-CENTER operating manual at paragraph 8.1
turnout/signals registered at the TWIN-CENTER on page 39.
Four statements have to be adjusted for each address:
1. The so-called Virtual Address (from 1 to 2048). This complies e.g. to the number of a turnout.
2. The Decoder Address or the decoder number. There are values of 1 up to 512 adjustable.
3. At the decoder output values between 1 to 4 can be adjusted (as all LDT-Decoder contain four
outputs).
4. The Data Format. It has to be set to D for DCC, if the LDT-Decoder shall take over the
switch events.
Littfinski DatenTechnik (LDT) Address
Internet / e-mail
Kleiner Ring 9
http://www.ldt-infocenter.com D-25492 Heist/Germany
info@ldt-infocenter.com
3
Phone
0049 4122 / 977 381
Fax
0049 4122 / 977 382
Banking connection
Kreissparkasse Suedholstein
(bank code 230 510 30)
Account-No. 3 99 43 57
Littfinski DatenTechnik (LDT)
Kleiner Ring 9 • D-25492 Heist/Germany • Phone: 0049 4122 / 977 381 • Fax: 0049 4122 / 977 382
As the required adjustments at the TWIN-CENTER will cause probably at first some problems, we
have created a table for your assistance including all details for the first 512 virtual addresses.
Please load the file twin-center_adressierungstabelle1.zip to your PC.
2.1.2. Programming the decoder address
During the operation at the TWIN-CENTER it can happen that after actuating the programming
key the decoder will switch the turnout at output 1 immediately into a fast sequence such as it
would confirm the programming of an address. In this case the address repetition storage of the
TWIN-CENTER contains by error data on which the decoder is already reacting.
Proceed now as follows:
1. Program the decoder immediately after switching-on the digital central unit, before any loc is
travelling.
2. Proceed with a RESET of the digital central unit. All stored data will be preserved, only the
address repetition storage will be deleted. On the TWIN-CENTER you have to activate at
switched-on status the keys GO and STOP together until “reset” will be shown at the display.
2.1.3. Adjusting the switching times
The TWIN-CENTER output is not a clear DCC-data format but a mixture of FMZ and DCC
format.
LDT-Decoder are optimal tuned to this data format. But will the decoder not switch always
reliable it is possible to adapt the TWIN-CENTER to the requirement.
At the paragraph 8.5 Adjustment of switching time (page 42 of the TWIN-CENTER Operating
Manual) this procedure is explained in detail. The factory adjustment has been set for the minimal
and maximal switching time of 50ms.
To solve the above described problem please extend the switching time up to 250ms.
Littfinski DatenTechnik (LDT) Address
Internet / e-mail
Kleiner Ring 9
http://www.ldt-infocenter.com D-25492 Heist/Germany
info@ldt-infocenter.com
4
Phone
0049 4122 / 977 381
Fax
0049 4122 / 977 382
Banking connection
Kreissparkasse Suedholstein
(bank code 230 510 30)
Account-No. 3 99 43 57
Littfinski DatenTechnik (LDT)
Kleiner Ring 9 • D-25492 Heist/Germany • Phone: 0049 4122 / 977 381 • Fax: 0049 4122 / 977 382
3. Operation of LDT Feedback Modules on the s88-feedback bus:
The TWIN-CENTER is equipped with a s88-feedback bus and enables therefore the possibility to
operate the LDT-Feedback Modules with this system
At the s88-feedback bus all feedback modules are connected behind each other and build therefore
a feedback line.
Different feedback modules (even from different manufacturer) can be combined within the
feedback line.
The first feedback module shall be connected directly to the TWIN-CENTER (LDT-Feedback
Modules are equipped with an original plug for the TWIN-CENTER), all further modules shall
follow and build together a feedback line.
2.8
2.9
2.10 2.11
1
8
IN1
2.7
2
7
2.6
2.12
2.13 2.14 2.15 2.16
6
5
IN2
4
3
2
1
IN1
Littfinski DatenTechnik
RM-GB-8
ST2
6
5
4
3
2
1
märklin
digital
IN
IN
Rev. 2.1
pink
grey
yellow
green
brown
white
pink
grey
yellow
green
brown
white
rosa
grau
gelb
gruen
braun
weiss
ST2
ST1
weiss
braun
gruen
gelb
grau
rosa
ST1
OUT
7
RM-GB-8
ST2
Rev. 2.1
8fach Rueckmeldemodul
mit Gleisbesetztmeldern
Octal feedback modul
with occupancy detectors
decoder s 88
rosa
grau
gelb
gruen
braun
weiss
Littfinski DatenTechnik
D-25482 Appen
www.ldt-infocenter.com
OUT
8
IN
16 galvanisch getrennte Rückmeldeeingänge
für den s88-Rückmeldebus.
Rueckmeldedecoder RM-DEC-88
16-channel feedback modul
Rev. 2.0
Littfinski DatenTechnik
8
7
6
5
4
3
2
1
16
15
14
13
12
11
10
9
3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1
Rückmeldemodul
RM-DEC-88 Opto
Peter Littfinski DatenTechnik
2.5
1.7
Digital-Profi werden!
Multi-Digital
2.4
3
2.3
4
1.5
2.2
IN2
1.3
1.8
5
1.1
1.6
6
1.9 1.11 1.13 1.15
1.4
7
1.2
8
2.1
1.10 1.12 1.14 1.16
8fach Rueckmeldemodul
mit Gleisbesetztmeldern
Octal feedback modul
with occupancy detectors
ST1
OUT
OUT
9
10
11
3.9 3.10
12
13
3.12
3.11
14
15
3.14
3.13
16
3.16
3.15
S88- feedback bus
S88- Rückmeldebus
FLEISCHMANN
TWIN-CENTER
LDT-Feedback Module (RM-DEC-88-Opto for quick action switches and RM-GB-8 with integrated track
occupancy reporting) and a Märklin s88-module at the s88-feedback bus of the TWIN-CENTER.
At the sample connection is at first the Feedback Module RM-DEC-88-Opto with 16 inputs for
quick action switches (reed contacts etc.) directly connected to the TWIN-CENTER as the first
module.
It follows by two RM-GB-8 with 8 track occupancy detectors each and a s88-standard module
from Märklin.
Littfinski DatenTechnik (LDT) Address
Internet / e-mail
Kleiner Ring 9
http://www.ldt-infocenter.com D-25492 Heist/Germany
info@ldt-infocenter.com
5
Phone
0049 4122 / 977 381
Fax
0049 4122 / 977 382
Banking connection
Kreissparkasse Suedholstein
(bank code 230 510 30)
Account-No. 3 99 43 57
Littfinski DatenTechnik (LDT)
Kleiner Ring 9 • D-25492 Heist/Germany • Phone: 0049 4122 / 977 381 • Fax: 0049 4122 / 977 382
Further information to our feedback modules for quick action switches and the useable rail
contacts can be found within the file “rmdec_info_engl”. Those can be loaded to your PC from
our Web-Site (www.ldt-infocenter.com) at the area “Downloads” or red and printed with the
Acrobat Reader.
If you require a transmittance of track occupancy reports from a 2-conductor rail system to the
TWIN-CENTER (and eventually further report to the model railway software at the PC), our
Feedback Module with integrated track occupancy detector RM-GB-8 will be an excellent
solution. The monitored track sections get the digital current supply via the feedback module. Has
been a current consumer located at the monitored track section this will be reported to he TWINCENTER via the s88-feedback bus.
3
2
1
IN1
Littfinski DatenTechnik
violett/weiß
violet/white
4
violett
violet
IN2
schwarz
black
5
Ç
6
Ç
7
Ç
Vom Modellbahntrafo
From transformer
RM-GB-8
RM-GB-8
Rev. 2.1
pink
grey
yellow
green
brown
white
ST2
8
Ç
rosa
grau
gelb
gruen
braun
weiss
gelb
yellow
ST1
8fach Rueckmeldemodul
mit Gleisbesetztmeldern
Octal feedback modul
with occupancy detectors
FLEISCHMANN
TWIN-CENTER
S88- Rückmeldebus
S88- feedback bus
Track occupancy reports transmitted with very low wiring effort by the LDT-Feedback Module RM-GB-8 via the
s88-feedback bus to the TWIN-CENTER.
.
Littfinski DatenTechnik (LDT) Address
Internet / e-mail
Kleiner Ring 9
http://www.ldt-infocenter.com D-25492 Heist/Germany
info@ldt-infocenter.com
6
Phone
0049 4122 / 977 381
Fax
0049 4122 / 977 382
Banking connection
Kreissparkasse Suedholstein
(bank code 230 510 30)
Account-No. 3 99 43 57