Littfinski DatenTechnik (LDT)
Kleiner Ring 9 • 25492 Heist • Tel: 04122 / 977 381 • Fax: 04122 / 977 382
Multi-Digital
Operation Instruction
TurnTable-Decoder
TT-DEC-R
from the Digital-Professional-Series !
TT-DEC-R-G Part-No.: 010513
>> finished module in a case <<
C:
IC3
Speed
P1
IC4
S1
Littfinski DatenTechnik (LDT)
K J
+
red brown
ST4
+
+
green yellow
red
16...18V~
Rückmeldg.
Feedback
M1M2
K J
red brown
Commands Track
KL3KL2KL1
TT-DEC-R
Rev. 1.2
JP1
LED1 LED2 LED3
A
KL4
7805 LM317
Drehscheiben-Decoder
22...24V=
+ ~ - ~
2L 3L
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
www.ldt-infocenter.com
Digital-Profi werden!
(DCC und Märklin-Motorola)
Für Roco H0 Drehscheibe 42615.
Drehscheiben-Decoder
TT-DEC-R
Multi-Digital
Suitable for the Roco H0 Turntable
42615.
The turntable can be equipped with 4
to 40 track connections.
Not aligned opposite track
connection can be adjusted by a
minimum offset angle of 4.5 degree.
Suitable for the data formats of
Märklin Motorola and DCC.
Compatible commands for the
Märklin turntable electronic 7686.
Therefore particular simple control
via every digital command station
and via any model railway software
which supports the Märklin turntable
electronic 7686 and with a graphic
turntable imaging.
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.
TT-DEC-R – Manual
- 1 -
Index: Page
1. Preface / Safety Instruction 2
2. Selecting the available turntable (old or new version) 2
3. Alterations on the Roco turntable 3
3.1. Free-wheeling diode soldering 3
3.2. Motor cable soldering 5
3.3. Bridge track contact isolation 7
4. Correct position of the turntable sliding switches and the setting
or removing of the matching jumper JP1 of the TT-DEC-R 8
5. TT-DEC-R connection to the digital layout and to the turntable 8
5.1. TT-DEC-R connection to the digital layout 8
5.2. TT-DEC-R connection to the turntable 10
5.2.1. TT-DEC-R connection to old version 10
5.2.2. TT-DEC-R connection to new version 11
6. Turntable-Decoder TT-DEC-R programming 12
6.1. Basic address and data format programming 12
6.2. Turning direction testing 13
6.3. Track connection programming 13
6.4. Bridge track polar reversal (only 2-conductor mode) 16
6.5. Turning speed adjustment 18
6.6. Reference track synchronizing 19
6.7. Special function: Turntable test / Factory setting 19
6.8. Programming- and Control-Table 20
7. Feedback reports 21
8. Assembly plan 23
TT-DEC-R – Manual
- 2 -
1. Preface / Safety Instruction:
You have purchased the TurnTable-Decoder TT-DEC-R for your model railway layout
supplied within the assortment of Littfinski DatenTechnik (LDT).
We are wishing you having a good time for the application of this product!
The purchased unit comes with 24 month guarantee (validity for the finished module and
finished module in a case only).
• Please read this instruction careful. For damages caused by disregarding this
instruction the right of claiming guarantee will expire. No liability will be taken over
for resultant damages. You can download this manual as a PDF-file with colored
pictures from the area “Downloads” at our Web-Site. The file can be opened with the
Acrobat Reader.
Many illustrations at this manual are identified with a file name (e.g. page_1165).
You can find those files on our Web-Site at the section “Sample Connections” of the
Turntable-Decoder TT-DEC-R. You can download the files as PDF-File and make a
colored print at the DIN A4 format.
• Attention: Carry out any connections only with disconnected model railway
layout (switch-off the transformers or disconnect the main plug).
2. Selecting the available turntable (old or new version):
The Roco H0 Turntable 42615 is available within two different versions. The difference
between the two versions is the supplied 8-poles flat ribbon cable and the supplied pc-
board for the under-floor drive of the turntable. For identification which version you
own please have a look at the bottom of the turntable. If there is a bore at the protection
cover as per the right sketch it will be the new version. Without a bore at the protection
cover it will be the old version as shown to the left.
Roco Drehscheibe 42615 alte Variante
Roco Turntable 42615 old version
R O
C O
0 1
schwarz
black
page_1165
R O
C O
0 1
Bohrung für zusätzliche
Schraubverbindung
bore for additional
screwed connection
Roco Drehscheibe 42615 neue Variante
Roco Turntable 42615 new version
schwarz
black
page_1165
TT-DEC-R – Manual
- 3 -
3. Alterations on the Roco Turntable:
•
Important Information: Any alteration on the Roco Turntable 42615 have to
be completed before the Turntable-Decoder TT-DEC-R gets into first operation.
An operation of the Turntable-Decoder TT-DEC-R before the electrical changes
have been completed (soldering the free-wheel diode and the drive-motor cables)
can eventually damage the Turntable-Decoder TT-DEC-R and as well your
turntable.
After completing the electrical alterations the Roco Turntable 42615 can not be
controlled anymore by the Roco-Turntable remote control unit.
3.1. Free-wheeling diode soldering:
The free-wheeling diode 1N4003 which is attached to each supplied Turntable-Decoder
TT-DEC-R has to be soldered onto the pc-board of the under-floor drive to prevent the
interference of the switching voltage of the interlock coil.
For this procedure please take off the protection cover of the under-floor drive
mechanic as described at the Roco Manual for the turntable and read the section
“Maintenance of the drive”.
After removing the protection cover you can see the pc-board and the under-floor drive
of the old version shown at the left draft and the new version at the right.
Roco Drehscheibe 42615 alte Variante
Roco Turntable 42615 old version
0 L
42615-a11
schwarz
black
schwarz
black
0 1
42615-A11
Roco Drehscheibe 42615 neue Variante
Roco Turntable 42615 new version
The detailed images on the next page show the wiring of the under-floor drive to the
pc-board before the alteration. The old version is shown at the left and the new version
at the right.
TT-DEC-R – Manual
- 4 -
Roco Drehscheibe 42615 alte Variante
Roco Turntable 42615 old version
42615-a11
Roco Drehscheibe 42615 neue Variante
Roco Turntable 42615 new version
15-A11
Please solder the diode 1N4003 onto the soldering terminals of the pc-board as shown
at the two detailed images.
Before soldering please shorten the connection wires of the diode 1N4003 to a length
of about 1 cm and bend both wires careful at 90 degree just after the diode body.
The diode 1N4003 has on one connection wire a printed ring (called cathode ring) for
the correct assembly direction.
The diode 1N4003 has been correct soldered at the old version if the cathode ring shows
to the right respectively direct to the track connections (image left).
At the new turntable version is the soldered position of the diode 1N4003 correct if the
cathode ring shows to the bottom to the worm drive (image right).
Roco Drehscheibe 42615 alte Variante
Roco Turntable 42615 old version
42615-a11
Diode
1N4003
Roco Drehscheibe 42615 neue Variante
Roco Turntable 42615 new version
15-A11
Diode
1N4003
TT-DEC-R – Manual
- 5 -
3.2. Motor cable soldering:
Each Turntable-Decoder TT-DEC-R will be supplied together with a 2m 2-poles motor
connection cable. On one side is the cable is equipped with two inductors.
Originally is the motor of the under-floor drive connected to the pc-board via two
wires. Remove this two cables by unsolder them from the motor connection and from
the pc-board.
After unsoldering the two wires you should solder the motor-cable (attached to each
turntable-Decoder TT-DEC-R) onto both motor connections as described within
section 3.2.1.
If the motor is not connected by two cables to the printed circuit board you own one
of the oldest Roco version of the HO Turntable 42615. On this oldest version the motor
receives the power supply via two contact springs which are riveted onto the pc-board
and give contact by pressure against two contact plates at the motor. The left picture
shows the motor-connection of the oldest version before alteration.
Motoranschluss vor Umbau
motor connection before rebuilding
Erster Umbauschritt
first step of rebuilding
At the first step of alteration shown within picture right the two spring-contacts shall
be bent down to the PC-board. Now there is no electrical contact to the two contacts
at the motor.
At the second alteration step shown on the next page the motor cable (attached to
each Turntable-Decoder TT-DEC-R) shall be soldered onto the motor. Each
connection wire of one choke shall be soldered onto one of the two hexagonal contact
plates of the motor.
Which of the two chokes soldered to one of the two contact plates does no matter.
TT-DEC-R – Manual
- 6 -
To prevent an electrical contact to the PC-board by vibration of the motor please
stick an isolation tape around the motor and over the two contact plates. The
isolation tape should be long enough to isolate the contact plates as well under the
pc-board.
Zweiter Umbauschritt
second step of rebuilding
Motorkabel
motor cable
Drosseln
Inductors
Motoranschluss nach Umbau
motor connection after rebuilding
Motorkabel
motor cable
Drosseln
Inductors
Isolierband
Insulating tape
After completion of alteration of the oldest Roco HO Turntable 42615 version tighten
the safety cover of the turntable as described within section 3.2.2.
3.2.1. Now solder the new motor cable to the two motor connections. Each connection
wire of the inductors has to be soldered to one of the two motor connections of the
under-floor drive.
Which of the two inductors soldered to which of the two motor connections does no
matter.
Roco Drehscheibe 42615 alte Variante
Roco Turntable 42615 old version
Diode
1N4003
Motorkabel
motor cable
Drosseln
Inductors
42615-a11
Roco Drehscheibe 42615 neue Variante
Roco Turntable 42615 new version
15-A11
Diode
1N4003
Drosseln
Inductors
Motorkabel
motor cable
TT-DEC-R – Manual
- 7 -
3.2.2. Before replacing the protection cover of the turntable as described within the
Roco Manual for the turntable within the section “Maintenance of the drive” and after
completion of the alteration you have to feed the motor cable through the opening on
the protection cover near the motor connections.
Each Turntable-Decoder TT-DEC-R will be supplied together with a cable fastener for
strain relief and for securing the motor cable onto the lower latch of the cover opening.
The pictures on the following page show both turntable versions after attaching the
protection cover including the motor cable after the completion of the electrical
alteration.
Roco Drehscheibe 42615 alte Variante
Roco Turntable 42615 old version
R O
C O
0 1
schwarz
black
Motorkabel
motor cable
R O
C O
0 1
schwarz
black
Roco Drehscheibe 42615 neue Variante
Roco Turntable 42615 new version
Motorkabel
motor cable
3.3. Bridge track contact isolation:
At the supply status the Roco turntable 42615 contains on each bridge track end two
slide contacts for the connection to the selected track.
These slide contacts have to be removed or isolated before the turntable
Decode TT-DEC-R will be set into function.
For removing or isolating the four sliding contacts you should remove several access
tracks respectively blind tracks as described at the manual for the Roco Turntable
42615.
If you do not want to remove the four sliding contacts with a small side cutter you will
have the possibility to lower the contacts to assure that no electrical contact to the track
connections is possible.
For this action please bend the sliding contacts carefully down and slide a little piece
of cable insulation between the sliding contact and the bridge track. The sliding
contact will be permanently lowered and can not provide any electrical contact to the
rails of the access tracks.
TT-DEC-R – Manual
- 8 -
4. Correct position of the turntable sliding switches and the setting or
removing of the matching jumper JP1 of the TT-DEC-R
:
There are two sliding switches at the lower side of the turntable.
One of the two sliding switches is market with a “0” and ”1”. For the operation in
connection to the Turntable-Decoder TT-DEC-R this switch has always to be set onto
position “1”.
The second slide switch is marked with the symbol “=” and “~”. The marking “=” indicates
the setting for the operation with the 2-conductor bridge track system and the marking
“~” indicates the setting for the 3-conductor system.
Now select the correct switch position in accordance to the used track conductor
system.
Additional information can be found within the Roco Manual for the turntable at the
section “Selecting the driving current system”.
If you use the turntable at the 2-conductor system (sliding switch at the turntable in
position “=”) please remove the jumper JP1 at the TT-DEC-R. You can find this jumper
at the right between the case cover and the heat sink of the Turntable-Decoder TT-
DEC-R.
If the operation of the turntable is used in a 3-conductor system (sliding switch of the
turntable in position “~” the jumper JP1 of the Turntable-Decoder TT-DEC-R shall
remain in position (supplied position).
5. TT-DEC-R connection to the digital layout and to the turntable:
• Important Information: Switch-off the electrical supply before performing any
connection work (switch-off all transformers or unplug the main connection).
5.1. TT-DEC-R connection to the digital layout:
The TurnTable-Decoder TT-DEC-R receives the power supply via the two clamps at
the very left side of the 6-poles connection clamp. The voltage can be between 16 and
18 Volt~ (alternated voltage of a model railway transformer). Both clamps are marked
accordingly.
The decoder receives the digital information via the third and fourth clamp (counted
from the left side) of the 6-poles connection clamp which is marked with “Commands”
on the pc-board. Supply the digital information directly from the control-unit or from a
booster respectively from the digital ring conductor “switching” which has been
connected to all accessory decoders. To assure that the TT-DEC-R receives interference-
free data do not take the digital information directly from the rails.
One of the two digital clamps has been marked with red and K and the other has been
marked with brown and J. The colors red and brown respectively the marking J and K
will be used by most command stations.
TT-DEC-R – Manual
- 9 -
Z805 LM317
IC3
Speed
P1
IC4
S1
Littfinski DatenTechnik (LDT)
K J
LED1
+
red brown
ST4
+
+
LED2 LED3
green
yellow
red
A
Rückmeldg.
Feedback
M1M2
K J
red brown
Commands Track
KL3 KL4KL2KL1
TT-DEC-R
Rev. 1.2
JP1
Drehscheiben-Decoder
16...18V~
22...24V=
+ ~ - ~
2L 3L
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
www.ldt-infocenter.com
Digital-Profi werden!
(DCC und Märklin-Motorola)
Für Roco H0 Drehscheibe 42615.
Drehscheiben-Decoder
TT-DEC-R
Multi-Digital
Von Digitalzentrale
oder Booster
From command station
or booster
braun
brown
Vom Modellbahntrafo
From transformer
gelb
yellow
Ringleitung "Fahren"
Ring conductor "driving"
Ringleitung "Schalten"
Ring conductor "switching"
braun
brown
rot
red
rot
red
braun
brown
The
digital
-
voltage
for
the bridge track shall be
connected to the two
clamps marked with
“Track”. This digital
voltage comes from the
digital ring conductor
“Driving”.
This two clamps are as
well marked with red and
K respectively with
brown and J.
Z805 LM317
IC3
Speed
P1
IC4
S1
Littfinski DatenTechnik (LDT)
K J
LED1
+
red brown
ST4
+
+
LED2 LED3
green
yellow
red
A
Rückmeldg.
Feedback
M1M2
K J
red brown
Commands Track
KL3 KL4KL2KL1
TT-DEC-R
Rev. 1.2
JP1
Drehscheiben-Decoder
16...18V~
22...24V=
+ ~ - ~
2L 3L
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
www.ldt-infocenter.com
Digital-Profi werden!
(DCC und Märklin-Motorola)
Für Roco H0 Drehscheibe 42615.
Drehscheiben-Decoder
TT-DEC-R
Multi-Digital
Von Digitalzentrale
oder Booster
From command station
or booster
braun
brown
Vom Modellbahntrafo
From transformer
gelb
yellow
braun
brown
rot
red
If you use for “
Driving
”
and “Switching” one
common digital ring
conductor you have to
connect the ports of the
clamps “Commands”
and “Track” with this
common ring
conductor.
TT-DEC-R – Manual
- 10 -
5.2. TT-DEC-R connection to the digital turntable:
At first please connect the two wires of the motor cable with the clamps M1 and M2 of
the Turntable-Decoder TT-DEC-R. Which wire you connect to which clamp does not
matter.
The Roco turntable 42615 will be supplied with an 8-poles flat ribbon cable.
Please attend to the differences between the flat ribbon cable of the old and the new
version of the Roco turntable 42615. The ribbon-cable has to be correctly attached
onto the 8-poles pc-board plug of the Turntable-Decoder TT-DEC-R.
5.2.1. TT-DEC-R connection to the old version:
The 8-poles flat ribbon cable of the old version of the Roco turntable 42615 contains
at the ends a black flat plug. Insert the flat plug of the one side of the flat ribbon cable
careful onto the pc-board socket of the TT-DEC-R that the black single wire of the flat
ribbon cable shows into right direction as shown at the following picture.
Roco Drehscheibe 42615 alte Variante
Roco Turntable 42615 old version
Motorkabel
motor cable
Z805 LM317
IC3
Speed
P1
IC4
S1
Littfinski DatenTechnik (LDT)
K J
LED1
+
red brown
ST4
+ +
LED2 LED3
green yellow
red
A
Rückmeldg.
Feedback
M1M2
K J
red brown
Commands Track
KL3 KL4KL2KL1
TT-DEC-R
Rev. 1.2
JP1
Drehscheiben-Decoder
16...18V~
22...24V=
+ ~ - ~
2L 3L
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
www.ldt-infocenter.com
Digital-Profi werden!
(DCC und Märklin-Motorola)
Für Roco H0 Drehscheibe 42615.
Drehscheiben-Decoder
TT-DEC-R
Multi-Digital
Von Digitalzentrale
oder Booster
From command station
or booster
braun
brown
Vom Modellbahntrafo
From transformer
gelb
yellow
Ringleitung "Fahren"
Ring conductor "driving"
Ringleitung "Schalten"
Ring conductor "switching"
braun
brown
rot
red
rot
red
braun
brown
schwarz
black
page_1162
Insert the flat plug of the second side of the flat ribbon cable onto the contact reed of
the turntable-under-floor drives as described at the Manual of the Roco turntable.
TT-DEC-R – Manual
- 11 -
5.2.2. TT-DEC-R connection to the new version:
The 8-poles flat ribbon cable of the new version of the Roco turntable 42615 contains
on each side a gray flat plug. Insert the flat plug careful onto the pc-board socket of
the TT-DEC-R in direction that the black single wire of the flat ribbon cable is showing
to the left as shown at the following pictures.
Roco Drehscheibe 42615 neue Variante
Roco Turntable 42615 new version
Z805 LM317
IC3
Speed
P1
IC4
S1
Littfinski DatenTechnik (LDT)
K J
LED1
+
red brown
ST4
+
+
LED2 LED3
green
yellow
red
A
Rückmeldg.
Feedback
M1M2
K J
red brown
Commands Track
KL3 KL4KL2KL1
TT-DEC-R
Rev. 1.2
JP1
Drehscheiben-Decoder
16...18V~
22...24V=
+ ~ - ~
2L 3L
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
www.ldt-infocenter.com
Digital-Profi werden!
(DCC und Märklin-Motorola)
Für Roco H0 Drehscheibe 42615.
Drehscheiben-Decoder
TT-DEC-R
Multi-Digital
Von Digitalzentrale
oder Booster
From command station
or booster
braun
brown
Vom Modellbahntrafo
From transformer
gelb
yellow
schwarz
black
Ringleitung "Fahren"
Ring conductor "driving"
Ringleitung "Schalten"
Ring conductor "switching"
braun
brown
rot
red
rot
red
braun
brown
Motorkabel
motor cable
page_1151
Insert the flat plug of the second side of the flat ribbon cable onto the contact reed of
the turntable under-floor drives as described at the Manual of the Roco turntable.
TT-DEC-R – Manual
- 12 -
6. Turntable-Decoder TT-DEC-R programming:
•
Important information: You can start with the first operation and with the
programming only after completing all processes of the sections 1 to 5 of this
manual. Setting the unit into operation without completing the processes
described within section 1 to 5 of this manual can damage the Turntable-Decoder
TT-DEC-R and your turntable.
Please proceed with the programming during the first operation exactly in accordance
to the sequences described within the following. If you skip one of the following
sections you can not expect an exact control of the digital function of your turntable
via the Turntable-Decoder TT-DEC-R.
6.1. Basic address and data format programming:
The TurnTable-Decoder TT-DEC-R will be controlled by accessory addresses (turnout
addresses) which will be used as well for switching of turnouts or signals.
The command structure of the TT-DEC-R is compatible to the commands of the Märklin
turntable-decoder 7686.
The indication of the data format for the control of the TurnTable-Decoder TT-DEC-R
from the command station (Märklin-Motorola or DCC) is not required. The data format will
be automatically recognized from the TT-DEC-R during the following programming
process of the basic address.
With reference to the Märklin turntable-decoder 7686 is the TurnTable-Decoder
TT-DEC-R able to use two address sections. If you use a PC-model railway software
for the control of the turntable you find mostly for the two address sections the instruction
of 14 and 15. With this selection is it possible to operate 2 turntables via 2 TurnTable-
Decoders TT-DEC-R on your layout.
The address section 14 covers the addresses 209 till 220 and the section 15 covers the
addresses 225 till 236. Only by using the full capacity of the turntable with 40 track
connections all addresses within the selected address section will be required.
If you use a multi-protocol command station which is able to send several data formats
you have to take care that all addresses within the selected address section will be
adjusted uniform to Märklin-Motorola or DCC.
A table showing the coherence between address section, address and turntable-
function can be found at chapter 6.8. “Programming- and Control-Table” within this
operation instruction. This table gives you as well the information about the symbols (if
required) your model railway software uses for the various turntable functions.
TT-DEC-R – Manual
- 13 -
Programming process:
1. Switch-on your digital-layout and the TurnTable-Decoder TT-DEC-R. If you want
to perform the programming of the TT-DEC-R via your model railway software you
have to switch-on those and adjust the turntable if required at first in accordance
to the relevant instruction of the software. It is important that your model railway
software supports the Märklin-turntable decoder 7686 because the TT-DEC-R
is compatible to the commands of the Märklin decoder.
2. Please press shortly 1-times the key S1 which is located at the right side next to
the TT-DEC-R heat-sink. Now the yellow LED will flash.
3. Send now several times the command >Drehrichtung< (Turning Direction) at
clockwise direction or anti clockwise from your digital command station or from
your model railway software in accordance to the programming- and control
table (chapter 6.8.). If the TT-DEC-R has recognized the command after several
times sending the command this will be indicated a switched-off yellow LED.
4. The TT-DEC-R will leave the programming mode automatically. All three light
emitting diodes will glow.
6.2. Turning direction testing:
For testing the turning direction you have to send the command >Step< (clock wise)
via your digital command station or via your model railway software. The turntable
bridge will turn clockwise to the next track connection.
If the bridge will turn anti-clockwise to the next track connection please switch off the
model railway transformer which supplies the Turntable-Decoder TT-DEC-R. Now
exchange the two wires of the motor cables at the clamps M1 and M2.
Switch-on the model railway transformer and send again the command >Step< at
clockwise direction. Now shall the bridge turn correct onto the next track connection.
6.3. Track connection programming:
Please attend: The adjustment of the turntable bridge turning direction has to
be completed in accordance to section 6.2 to assure the clock-wise turning of the
turntable bridge to the next track connection by each >Step< command before starting
with the programming of the track connections.
By programming the track connections you have to prepare your TurnTable-Decoder
TT-DEC-R to be able to recognize all available track connections and to turn the
turntable bridge to the required track connection during the operation.
The turntable can be equipped with 4 to 40 track connections.
TT-DEC-R – Manual
- 14 -
Non-aligned opposite track connections can have an offset with a minimum angle of
4.5 degree.
Roco Drehscheibe 42615
Roco Turntable 42615
min. 4,5°
page_1159
During the programming process please define one track connection as track 1 as a
so-called reference track.
Programming process:
1. Press 2-times shortly the key S1. The green LED flashes.
2. Send now the command >Input<. The red LED will switch off shortly and the
turntable turns eventually to the last programmed reference track.
3. Turn now the turntable with the >Step< commands (clockwise or anti clockwise)
to the track 1 (reference track).
4. Send now the command >Clear< for storing the position of track 1 (reference
track). The red LED will be shortly switched off.
5. Turn now the turntable with the command >Step< clockwise to the next available
track connection. Consider as well single opposite track connections.
6. Store now the track connection with the command >Input<. The red LED will be
switched off shortly.
7. Set-up further track connections by following the same procedure.
8. You will have programmed all track connections if the bridge has reached the
last track connection before the bridge will turn clockwise to the reference track
by the next >Step< command but turned by 180 degree. Send additionally for
the last track connection the command >End<. The turntable bridge turns to the
track connection 1 (reference track) and the programming mode will be closed.
If the turntable bridge will not turn back to the reference track please repeat the
programming process.
TT-DEC-R – Manual
- 15 -
Test now the programming by sending the command >Turn<. If the bridge turns now
by 180 degree is the programming successful.
Programming sample:
With reference to the programming process item 3 has the turntable bridge turned into
the reference position. The bridge stops in level with the small house on the left side.
With the command >Clear< will be the position track 1 (reference track) stored.
(Programming process item 4).
With the command >Step< clockwise the bridge will turn to the next available track
connection. This is one single opposite track connection (track 2). With the command
>Input< will be the track connection 2 stored. (programming process item 5 and 6).
With the command >Step< clockwise you can proceed to the track connections 3, 4, 5
and 6. Each track connection will be stored with the command >Input<.
The track connection 6 is the last track connection to be programmed. By releasing
the next >Step< command the bridge would turn clockwise to the reference track but
turned by 180 degree (the small house will be on the right side).
Therefore shall be an additional command >End< released on the track connection 6.
The turntable bridge will return to track 1 (reference track) and the programming
mode will be automatically closed (programming process item 7).
Roco Drehscheibe 42615
Roco Turntable 42615
1> Clear <
> Input <
2
3
> Input <
4
> Input <
> Input <
5
> Input <
> End <
6
1
2
3
4
6
page_1241
TT-DEC-R – Manual
- 16 -
6.4. Bridge track polar reversal (only 2-conductor mode):
This section is relevant only if you use your Roco turntable 42615 in 2-conductor mode.
For using the 3-conductor mode (tracks with center conductor) is no bridge track
polar reversal required.
As described within section 3.3. (isolation of bridge track contacts) is a complete
isolation between bridge track and track connections required.
On this way all turntable tracks will get constant digital current supply. The constant
digital current supply to the tracks makes sense because on this way is it possible to
switch even inside the shed specific locomotive-functions on or off.
The bridge-track receives the digital current supply via the two with “Track” marked
clamps of the Turntable-Decoder TT-DEC-R.
But if the turntable bridge turns by 180 degree it will give a short circuit if the polarity of
the bridge-track will not be matched to the polarity of the connection track.
The Turntable-Decoder TT-DEC-R is able to change the bridge-track polarity short-
circuit free. For the bridge-track is therefore no reverse-loop module required.
At first the wiring of all track-connections around the turntable has to be completed with
the attention to the requirement that the opposite tracks have to have the same polarity.
Therefore will be there a parting-line between two different wiring sections.
As shown within the following sample connection has the brown cable of the left
turntable section always to be connected with the first rail if you look clockwise to the
wiring.
T
r
e
n
n
l
i
n
i
e
p
a
r
t
i
n
g
l
i
n
e
Roco Drehscheibe 42615
Roco Turntable 42615
1
5
6
1
2
3
4
6
Von Digitalzentrale
oder Booster
From command station
or booster
rot
red
braun
brown
TT-DEC-R – Manual
- 17 -
At the right turntable section has the red digital cable always to be connected to the
first rail if looking to the wiring in clockwise direction.
If the turntable bridge is passing the parting-line between the two wiring sections the
Turntable-Decoder TT-DEC-R will change the polarity of the bridge track provided that
you programmed the parting-line. At the sample connection will be the parting-line on
the track 4 because the polarity has to be changes if clockwise turning after track 4 and
anti-clockwise after track 5 has the polarity to be changed.
Programming process:
1. Turn the turntable bridge to the reference position. Now all LED will lighten.
2. Activate now 2 times shortly the key S1. The green LED flashes.
Turn now the turntable bridge clockwise with the command >Step< to the track
connection with the imagined parting-line.
3. Send now the command >Turning direction< clockwise or anti clockwise. The
boarding line will be stored and the programming mode closed. The turning
bridge will turn now automatically to the track connection 1.
4. Check: Send the command >Turn< clockwise. When the turning bridge passes
the parting-line (at the sample at track 4) the red LED will be shortly switched
off.
TT-DEC-R – Manual
- 18 -
6.5. Turning speed adjustment:
The moving speed of the turning-bridge can be adjusted via the potentiometer “Speed”
situated at the back left side next to the heat sink. Ex-factory the setting of the
potentiometer will be in center position.
Potentiometer “Turntable Speed”.
schneller
faster
langsamer
slower
Bühnengeschwindigkeit
bridge speed
page_524
If you want to exceed the turning speed of the bridge turn the potentiometer center
with a small screw driver to the left. If you turn the potentiometer center to the right
the speed of the bridge will be slower.
The Turntable-Decoder TT-DEC-R supports driving times of 30 to 45 seconds for one
180 degree turn of the bridge. You can test the turning time with the command >Turn<.
If the turning time will be outside of 30 to 45 seconds the red LED will flash after the
180 degree turning.
If the turntable bridge will stop during normal operation sometimes shortly after a
driving command and within the exit of a track connection, in this case please increase
the turning speed a little by turning the potentiometer center a little to the left.
TT-DEC-R – Manual
- 19 -
6.6. Reference track synchronizing:
If the image of the turntable position at the model railway software or on the display
of the digital command station does not conform to the actual position of the turntable
bridge you can carry out a synchronization.
Synchronization process:
1. Press shortly 1 times the key S1. The yellow LED will flash.
2. Turn the turntable bridge with the commands >Step< (clockwise or anti
clockwise) to the track 1 (reference track). The position of the turntable indicated
on the PC screen or on the display does not matter.
3. Send the command: turn directly to track 1. The turntable bridge does not turn.
The turntable symbol on the screen or on the display indicates now also track 1.
If the position of the control housing is not correct please send again the
command turn directly to track 1.
4. Send now the command >Drehrichtung< (turn direction) clockwise or anti
clockwise. The synchronization process is now completed and the yellow LED
will be switched off.
6.7. Special function: Turntable test / Factory setting:
6.7.1. Turntable test:
Press the programming key S1 approx. 4 seconds until the red LED will switch off.
The bridge will turn by 360 degree after releasing the key and will stop shortly on each
programmed track connection.
6.7.2. Factory setting:
If the programming-key S1 will be depressed for 2 seconds during switching-on the TT-
DEC-R, all adjustments will be deleted and the factory setting will be restored (basic
address 225, data format DCC).
TT-DEC-R – Manual
- 20 -
6.8. Programming- and Control Table:
STOP
area: 14
address
209
209
210
210
211
211
212
212
213
213
214
214
...
...
224
224
operation mode
-
-
-
> Turn <
clock wise
> Step <
anti clock wise
clock wise
> Drehrichtung <
anti clock wise
track connection 1
track connection 2
track connection 3
track connection 4
...
...
track connection 23
track connection 24
IB
red
green
red
green
red
green
red
green
red
green
red
green
...
...
red
green
turnout
command
round
straight
round
straight
round
straight
round
straight
round
straight
round
straight
...
...
round
straight
area: 15
address
225
225
226
226
227
227
228
228
229
229
230
230
...
...
240
240
programming mode
> Ende <
> Input <
> Clear <
> Turn <
clock wise
> Step <
anti clock wise
clock wise
> Drehrichtung <
anti clock wise
-
-
-
-
...
...
-
-
turntable function (command) LH100
-
+
-
+
-
+
-
+
-
+
-
+
...
...
-
+
multiMAUS
...
...
Abbreviations: IB = Intellibox; LH100 = manual control Lenz Digital plus; CS1 / CS2 / CS3 = Central Station 1 / 2 / 3; TC = TrainController
DIR
DIR
180°
Clr
Input
End
...
...
CS 1
ECoS
End
Clear
Input
Turn
Win-
Digipet
TC
-
-
-
CS 2
...
...
...
...
Step
Step
symbolkey
CS 3
end
input
clear
turn
step
step
1
2
3
4
23
24
...
...
end
input
clear
step
step
page_545
TT-DEC-R – Manual
- 21 -
7. Feedback Reports:
The Turntable-Decoder TT-DEC-R is able to transmit the information “Bridge track
occupied” and “Position reached” to Feedback Modules. This feedback information
can be used from a digital command station or from a model railway software for
further automatic control of the turntable.
The turntable bridge track receives digital current supply from the clamps “Track” via
the Turntable-Decoder TT-DEC-R. If the clamp “Track” is connected to the output of a
Track Occupancy Detector (e.g. GBM-8) or to a Feedback Module with integrated
track occupancy report (e.g. RM-GB-8-N or RS-8) there will be a feedback report
“Bridge Track occupied” whenever a locomotive receives digital current on the bridge
track.
If the turntable bridge has reached the required position the Turntable-Decoder
TT-DEC-R will send a feedback signal to the 2-poles clamp KL4 which is marked with
“Feedback”. This signal can be evaluated from the model railway software and used for
further control actions.
The following sample connections will show the required wiring for the new version of
the Roco Turntable 42615 which can be used as well for the old version.
The shown wiring can be used for the Turntable-Decoder TT-DEC-R in connection
with Feedback Modules as well for the 3-conductor operation.
You can find on the following pages and at our Web-Site at the section “Sample
Connections” at the Turntable Decoder TT-DEC-R further colored wiring samples for
the old and the new version of the Roco Turntable.
7.1. Feedback Reports “Position reached” and “Bridge Track occupied” with Track
Occupancy Detector GBM-8 in connection with Roco Feedback Module 10787:
Z805 LM317
IC3
Speed
P1
IC4
S1
Littfinski DatenTechnik (LDT)
K J
LED1
+
red brown
ST4
+
+
LED2 LED3
green
yellow
red
A
Rückmeldg.
Feedback
M1M2
K J
red brown
Commands Track
KL3 KL4KL2KL1
TT-DEC-R
Rev. 1.2
JP1
Drehscheiben-Decoder
16...18V~
22...24V=
+ ~ - ~
2L 3L
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
www.ldt-infocenter.com
Digital-Profi werden!
(DCC und Märklin-Motorola)
Für Roco H0 Drehscheibe 42615.
Drehscheiben-Decoder
TT-DEC-R
Multi-Digital
braun
brown
Vom Modellbahntrafo
From transformer
gelb
yellow
Roco Drehscheibe 42615 neue Variante
Roco Turntable 42615 new version
schwarz
black
5678J
K
Littfinski
DatenTechnik (LDT)
GBM-8
J1234
K
Zu den Gleisen
To the tracks
567
8
+
123
4
+
Rev. 1.0
8-fach Gleisbelegtmelder
Octal occupancy
detector
Digital-Profi werden!
Zum direkten Anschluss an die Rückmeldemodule
RM-88-N-O/RM-DEC-88-O und Roco 10787.
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
www.ldt-infocenter.com
8-fach Gleisbelegtmelder
GBM-8
rot
red
rot
red
Überwachte Bereiche im
Umfeld der Drehscheibe
monitored areas within turntable
Diode 1N4003
Bestellbezeichnung: 1N4003
Diode 1N4003
Order code: 1N4003
Widerstand 1,5KOhm /0,6W
Bestellbezeichnung: Res1K5
Resistor 1,5KOhm /0,6W
Order code: Res1K5
10787
BUS
8 7 6 5 4 3 2 1
++
BUS
87654321
Von Zentrale oder Booster
From command station
or booster
Roco Rückmeldebus
Roco feedback bus
Von Digitalzentrale
oder Booster
From command station
or booster
Ringleitung "Schalten"
Ring conductor "switching"
braun
brown
rot
red
Motorkabel
motor cable
page_1153
“Position reached” and “Bridge Track occupied” with GBM-8 and Roco 10787
TT-DEC-R – Manual
- 22 -
7.2. Feedback Reports “Position reached” and “Bridge Track occupied” with
Feedback Module RS-8 for the RS-Feedback bus (Lenz Digital plus):
Z805 LM317
IC3
Speed
P1
IC4
S1
Littfinski DatenTechnik (LDT)
K J
LED1
+
red brown
ST4
+
+
LED2 LED3
green yellow
red
A
Rückmeldg.
Feedback
M1M2
K J
red brown
Commands Track
KL3 KL4KL2KL1
TT-DEC-R
Rev. 1.2
JP1
Drehscheiben-Decoder
16...18V~
22...24V=
+ ~ - ~
2L 3L
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
www.ldt-infocenter.com
Digital-Profi werden!
(DCC und Märklin-Motorola)
Für Roco H0 Drehscheibe 42615.
Drehscheiben-Decoder
TT-DEC-R
Multi-Digital
8-fach Rückmeldemodul
mit Gleisbesetztmeldern
8-fold feedback module
with occupancy detectors
RS-8
Rev. 3.2
12345678
IN1
IN2
LED1
J KJ K
Littfinski DatenTechnik (LDT)
R
S
14 ..18V~
S1
KL7 KL8
8-fach Rückmeldemodul mit integrierten
Gleisbelegtmeldern für den RS-Rückmeldebus.
8-fold feedback module with occupancy
detectors for the RS-feedback bus.
RS-8
Rückmeldemodul / Feedback module
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
www.ldt-infocenter.com
Digital-Profi werden!
Von Digitalzentrale
oder Booster
From command station
or booster
braun
brown
Vom Modellbahntrafo
From transformer
gelb
yellow
Roco Drehscheibe 42615 neue Variante
Roco Turntable 42615 new version
schwarz
black
Ringleitung "Schalten"
Ring conductor "switching"
braun
brown
rot
red
Motorkabel
motor cable
braun
brown
J
rot
red
K
rot
red
rot
red
Von Digitalzentrale
oder Booster
Ringleitung "Fahren"
From command station
or booster
Ring conductor "driving"
Diode 1N4003
Bestellbezeichnung: 1N4003
Diode 1N4003
Order code: 1N4003
Widerstand 1,5KOhm /0,6W
Bestellbezeichnung: Res1K5
Resistor 1,5KOhm /0,6W
Order code: Res1K5
R S
Von LZ100/LVZ100
From LZ100/LVZ100
Vom Modellbahntrafo
From transformer
Überwachte Bereiche im
Umfeld der Drehscheibe
monitored areas within turntable
page_1181
“Position reached” and “Bridge Track occupied” with Feedback Module RS-8
7.5. Feedback reports “Position reached“ and “Bridge Track occupied” with
Feedback Module RM-GB-8-N for the s88-Feeedback bus:
Überwachte Bereiche im
Umfeld der Drehscheibe
monitored areas within turntable
8-fach Rückmeldemodul
mit Gleisbesetztmeldern
8-fold feedback module
with occupancy detectors
RM-GB-8-N
Rev. 1.1
12345678
IN1IN2
IN
ST2ST1
s88-N
OUT IN
s88-N
OUT
BU1 BU2
8-fach Rückmeldemodul mit integrierten
Gleisbelegtmeldern für den s88-Rückmeldebus.
8-fold feedback module with occupancy
detectors for the s88-feedback bus.
RM-GB-8-N
Rückmeldemodul / Feedback module
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
www.ldt-infocenter.com
Digital-Profi werden!
s88-N
Z805 LM317
IC3
Speed
P1
IC4
S1
Littfinski DatenTechnik (LDT)
K J
LED1
+
red brown
ST4
+
+
LED2 LED3
green yellow
red
A
Rückmeldg.
Feedback
M1M2
K J
red brown
Commands Track
KL3 KL4KL2KL1
TT-DEC-R
Rev. 1.2
JP1
Drehscheiben-Decoder
16...18V~
22...24V=
+ ~ - ~
2L 3L
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
www.ldt-infocenter.com
Digital-Profi werden!
(DCC und Märklin-Motorola)
Für Roco H0 Drehscheibe 42615.
Drehscheiben-Decoder
TT-DEC-R
Multi-Digital
Von Digitalzentrale
oder Booster
From command station
or booster
braun
brown
Vom Modellbahntrafo
From transformer
gelb
yellow
Roco Drehscheibe 42615 neue Variante
Roco Turntable 42615 new version
schwarz
black
Ringleitung "Schalten"
Ring conductor "switching"
braun
brown
rot
red
Motorkabel
motor cable
braun
brown
J
rot
red
K
rot
red
rot
red
Von Digitalzentrale
oder Booster
Ringleitung "Fahren"
From command station
or booster
Ring conductor "driving"
Diode 1N4003
Bestellbezeichnung: 1N4003
Diode 1N4003
Order code: 1N4003
Widerstand 1,5KOhm /0,6W
Bestellbezeichnung: Res1K5
Resistor 1,5KOhm /0,6W
Order code: Res1K5
page_1177
“Position reached” and “bridge track occupied” with Feedback Module RM-GB-8-N
TT-DEC-R – Manual
- 23 -
8. Assembly Plan:
Made in Europe by
Littfinski DatenTechnik (LDT)
Kleiner Ring 9
D-25492 Heist/Germany
Phone: 0049 4122 / 977 381
Fax: 0049 4122 / 977 382
Internet: http://www.ldt-infocenter.com
Subject to technical changes and errors 09/2017 by LDT
Märklin, Motorola and Fleischmann are a registered trade mark.
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