tams elektronik LD-G-43 User manual

Locomotive decoders LD-G-43
Manual
LD-G-43
without connecting cables
Item no. 41-04430
LD-G-43
with connecting cables
Item no. 41-04431
LD-G-43
with N M 652 connector
Item no. 41-04432
LD-G-43
with PluX22 plug
Item no. 41-04433
tams elektronik
n n n
DCC DCC-AMM

LD-G-43 tams elektronik
Version: 1.0 | Status: 07/2023
© Tams Elektronik GmbH
All rights reserved, in particular the right of reproduction, distribution and translation. Copies,
reproductions and alterations in any form require the written permission of Tams lektronik
GmbH. We reserve the right to make technical changes.
Printin the manual
The formatting is optimised for double-sided printing. The standard page size is DIN A5. If
you prefer a larger display, printing on DIN A4 is recommended.
Notes on standards
The following RailCommunity standards are mentioned in this manual:
RCN-122 "PluX - 22 and 16-pole interface"
RCN-217 "DCC feedback protocol – RailCom"
RCN-218 "DCC-A - Automatic registration"
RCN-227 "DCC xtended Function Assignment"
RCN-530 "Inrush Current Limitation for Decoders & Boosters"
RCN-600 "SUSI-Bus Module xtension Interface"
The standards are published at: www.railcommunity.org
Notes on RailCom®
RailCom® is a German trademark registered in the name of Lenz lektronik for class 9
" lectronic Controls" under number 301 16 303 and a trademark registered for classes 21, 23,
26, 36 and 38 " lectronic Controls for Model Railways" in U.S.A. under Reg.No. 2,746,080. To
enhance the readability of the text, we have refrained from referring to the term each time it
is used.
**Products of other manufacturers
This manual mentions the following companies:
Gebr. MÄRKLIN & Cie. GmbH
Stuttgarter Str. 55-57 | D -73033 Göppingen
2 | Contents

tams elektronik LD-G-43
Contents
1. Getting started.............................................................................................................5
1.1. Contents of the package.......................................................................................5
1.2. Required accessories............................................................................................5
1.3. Intended use.......................................................................................................7
1.4. Safety instructions................................................................................................7
2. Operation overview.......................................................................................................8
2.1. Digital operation...................................................................................................8
2.2. Analogue mode....................................................................................................9
2.3. Overload protection............................................................................................10
2.4. Motor control.....................................................................................................11
2.5. Automated processes..........................................................................................14
2.5.1. ABC braking procedure..............................................................................14
2.5.2. Braking at DC voltage................................................................................15
2.5.3. Automatic uncoupling ("uncoupling waltz").................................................16
2.5.4. Shunting function......................................................................................16
2.5.5. Speed-dependent switching on and off.......................................................16
2.5.6. Stop/Start with a function..........................................................................16
2.6. Outputs and interfaces........................................................................................17
2.7. Triggering the actions.........................................................................................19
2.8. Feedback with RailCom.......................................................................................20
2.9. Automatic registration according to RCN-218 (DCC-A)..........................................20
3. Connections...............................................................................................................22
3.1. Safety instructions..............................................................................................22
3.2. Safe and correct soldering...................................................................................23
3.3. Avoiding irreparable damage to the decoder!.......................................................24
3.4. Pin assignment LD-G-43 | Front side....................................................................25
3.5. Pin assignment LD-G-43 | Rear side.....................................................................27
3.6. Using decoders with interface connectors.............................................................28
3.7. Use of the LD-G-43 in locomotives with AC motor.................................................29
3.8. Mounting decoders without interface...................................................................29
3.9. Connecting L Ds to the function outputs..............................................................31
3.10. Connecting inductive loads..................................................................................33
3.11. Connecting the switching inputs..........................................................................33
3.12. Connecting a backup capacitor or buffer circuit....................................................35
3.13. Connection of a SUSI module..............................................................................36
3.14. Completion.........................................................................................................36
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LD-G-43 tams elektronik
4. Programming..............................................................................................................36
4.1. Programming with DCC central units....................................................................36
4.2. Programming with Motorola central units.............................................................37
5. Configuration variables and registers............................................................................38
5.1. Basic settings.....................................................................................................38
5.2. Setting the address.............................................................................................39
5.3. Setting the motor control....................................................................................40
5.4. Function mapping...............................................................................................42
5.5. ffects of the outputs.........................................................................................48
5.6. Settings for the switching inputs..........................................................................51
5.7. RailCom and DCC-A settings................................................................................52
5.8. Settings for driving operation..............................................................................53
5.9. Settings for analogue mode................................................................................55
5.10. Sensivity of the overload protection.....................................................................56
5.11. Auxiliary functions..............................................................................................57
5.12. Information........................................................................................................57
6. Checklist for troubleshooting and error correction.........................................................58
6.1. Problems with programming the decoder.............................................................58
6.2. Problems in driving mode....................................................................................58
6.3. Problems with the feedback of the decoder..........................................................59
6.4. Problems when switching functions.....................................................................60
6.5. Problems when switching via the switching input..................................................60
6.6. Problems in analogue mode................................................................................60
6.7. Technical Hotline................................................................................................61
6.8. Repairs..............................................................................................................61
7. Technical data............................................................................................................62
8. Warranty, U conformity & W ................................................................................64
8.1. Guarantee bond.................................................................................................64
8.2. U Declaration of Conformity..............................................................................65
8.3. Declarations on the W Directive.....................................................................65
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tams elektronik LD-G-43
1. Getting started
This manual will help you step by step to mount and commission the decoder safely and
correctly. Before you connect the decoder and put it into operation, please read this manual
completely, particularly the chapter on safety instructions and the checklist for trouble
shooting. You will then know where to take care and how to prevent mistakes which take a lot
of effort to correct.
Keep this manual safely so that you can solve problems in the future. If you pass the decoder
on to another person, please pass on the manual with it.
1.1. Contents of the package
one locomotive decoder. N.B. For technical reasons it is possible that the PCB is not
completely inserted. This is not a fault.
one electrolytic capacitor, capacity: 220 µF, proof voltage: 35 V
Versions LD-G-43
(item number)
Connecting wires / Interface
41-04430 without cables / interface
41-04431 with connecting cables (cable length: 100 mm)
41-04432 with 8-pole plug according to N M 652
41-04433 with 22-pole plug according to N M 658 and RCN-122 (PluX22)
1.2. Required accessories
Tools and consumables
For mounting and connecting decoders without interface you need:
a soldering iron with temperature control and a thin tip and a deposit stand or a controlled
soldering station
a scraper, rag or sponge
a heat-resistant pad
a small pair of side cutters and wire strippers
tweezers and flat-nose pliers if necessary
electronic solder (preferably 0.5 to 0.8 mm diameter)
For the connection of decoders without interface or soldered connection cables you also need
stranded wires. If possible, use thin, flexible or highly flexible stranded wires that consist of
several thin individual wires and can be easily laid in the vehicle. Recommended cross-
sections:
> 0,04 mm² for the connections to the function outputs
> 0,05 mm² for the connections to the common return conductor and the backup capacitor
> 0,05 mm² for the connections to the motor and current collectors / slider
Getting started | 5

LD-G-43 tams elektronik
Connection to an AC motor
a load control adapter LRA (item no. 70-02105 or 70-02106) or
a permanent magnet (e.g. no. 70-04100, 70-04200 or 70-04300) or
a motor modification set (e.g. no. 70-40110, 70-40210 or 70-40310)
Brid in power interruptions
To bridge short current interruptions you need:
an electrolytic capacitor with a capacity of 100 to 470 µF
for exclusive use in digital systems: proof voltage > 25 V
for use in analogue systems: proof voltage > 35 V
Note: A 220 µF/35 V capacitor is included in the scope of delivery.
or a buffer circuit, e.g.
USV-mini 0.47 (capacity 0.47 F, item no. 70-02215 or 70-02216)
USV mini 1.0 (capacity 1.0 F, item no. 70-02225 or 70-02226)
USV mini 1.5 (capacity 1.5 F, item no 70-02235 or 70-02236).
Automatic tri erin of switchin operations
If you want to trigger switching operations automatically, you need:
reed contacts 1 x closing contact (e.g. item-no. 84-53110) and / or
Hall-sensors (e.g. item-no. 84-53210) and
permanent magnets (e.g. neodymium magnets Ø 3mm, thickness = 2mm, item-no.
84-53990)
ABC brakin section or ABC-shuttle section
To be able to use the ABC braking method, you need
per braking distance: one ABC brake module (e.g. ABC-1 art. no. 49-03106-01)
per shuttle section: two ABC brake modules (e.g. ABC-1 art. no. 49-03106-01)
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1.3. Intended use
The locomotive decoder LD-G-43 is designed to be operated according to the instructions in
this manual in model building, especially in digital model railroad layouts. Any other use is
inappropriate and invalidates any guarantees.
The locomotive decoder should not be mounted by children under the age of 14.
Reading, understanding and following the instructions in this manual are mandatory for the
user.
1.4. Safety instructions
The LD-G-43 locomotive decoder is equipped with integrated circuits (ICs). These are
sensitive to electrostatic charge. Therefore, do not touch the decoder until you have
"discharged" yourself. For this purpose, e.g. a grip on a radiator is sufficient.
Improper use and non-observance of the instructions can lead to incalculable hazards. Prevent
these dangers by carrying out the following measures:
Only carry out installation work when the decoder is de-energised. When carrying out
soldering work on the decoder, also observe the instructions in sections 3.1 and 3.2.
Only carry out installation work in closed, clean and dry rooms. Avoid moisture, wetness
and splashing water in your working environment.
Supply the decoder only with extra-low voltage as specified in the technical data. Only use
tested and approved transformers for this purpose.
Only plug the mains plugs of transformers and soldering irons / soldering stations into
professionally installed and fused earthed sockets.
Do not expose the decoder to high ambient temperatures or direct sunlight. Observe the
information on the maximum operating temperature in the technical data.
If you notice damage or malfunctions, switch off the supply voltage immediately. Send the
decoder in for inspection.
Getting started | 7

LD-G-43 tams elektronik
2. Operation overview
2.1. Digital operation
The locomotive decoder is a multiple protocol decoder, that can operate with and
automatically recognise both DCC or Motorola formats.
DCC
according to NMRA and RCN-standard
Motorola II (MM II)
Number of
addresses
127 basic addresses or 10.239
extended addresses
255
Speed level
modes
14, 28 or 128
in 28/128 speed level mode: SDF*
MM II: 14 or 27b
Programming Configuration variables:
Direct programming on the
programming track (DCC conform)
or
PoM (Programming on Main)
= main track programming)
Registers
* Back round info: SDF (Speed – Direction – Function)
This procedure makes it possible to transmit speed, direction and function commands
combined in a single command instead of individually in several commands. This significantly
reduces the transmission time for the commands to the vehicle decoders, which has a
positive effect especially when using decoders with many functions.
Prerequisites for the use is the use of a digital control centre that supports this procedure
and the setting of the speed step mode 28 / 128 on the decoder.
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2.2. Analogue mode
The locomotive decoder LD-G-43 can also be used in analogue model railway layouts run with
an AC or DC speed control. The decoder automatically detects whether an AC or DC speed
control is used to power the layout.
Caution:
Old analogue driving transformers (e.g. models in a blue housing from Märklin**) are not
suitable for use with digital decoders in analogue operation! These transformers have been
designed for the older supply voltage of 220 V and, due to construction, generate very high
overvoltage pulses when changing the driving direction. When using them with the modern
supply voltage of 230 V too high overvoltage pulses can occur, damaging electronic parts on
the decoder. For that reason only use driving transformers designed for a net voltage of 230
V.
Automatic analo ue reco nition
When putting the vehicle on the rails the decoder recognizes automatically if it is run in
analogue or digital mode and sets the corresponding operation mode. The automatic analogue
recognition can be switched off, e.g.
if the decoder suddenly switches to analogue mode in digital operation (e.g. as a result of
interference voltages whose cause is difficult to localise);
if a value for the Packet Time Out is programmed to perform a forced stop in case of track
voltage failure or shutdown;
if the procedure "braking with DC voltage" (Märklin** braking distance) is used.
Switchin the function outputs in analo ue mode
Switching the function outputs on or off is not possible in analogue mode. The outputs can be
programmed with the digital central unit so that they are either switched on or off in analogue
mode. The effects set for the outputs are active in analogue mode as well.
Outputs that are switched depending on the direction are switched on or off in analogue mode
according to the direction of travel. When operated in analogue d.c. layouts this applies only to
lamps or accessories where the return conductor is connected to the decoder´s common return
conductor for all function outputs.
Other functions active in analo ue mode
The settings made in the CVs / registers for
the maximum speed
the acceleration and brake delay
and the load control
are also taken over in analogue mode.
Operation overview | 9

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Reaction to an overvolta e pulse
In analogue AC systems, interference voltages from the system can be interpreted by the
decoder as a changeover pulse for changing the direction of travel. The sensitivity with which
the decoder reacts to an overvoltage pulse with a change of driving direction can be set in a
CV.
2.3. Overload protection
The locomotive decoder LD-G-43 has an overload protection which protects it from damage in
case of exceeding the permissible total current or a short circuit at the motor output (the
maximum form of an overload). If an overload is detected, the motor is switched off and
lights that are switched with F0f or F0r flash. Resumption of operation is only possible after
the decoder has been de-energised (track voltage off).
The response threshold of the overload protection can be adjusted by change in sensitivity,
i.e. the magnitude of the overload at which the overload is detected ("short-circuit
sensitivity").
Overload at an output
In case of a short-circuit at one output or if the maximum current at one of the outputs is
exceeded, the overload protection of the decoder is ineffective as long as the total current of
the decoder is not also exceeded. The output in question will be damaged.
Attention:
By lowering the overload response threshold, the influence of short-term interference
voltages from the motor or connected consumers is to be reduced. This prevents the motor
from being switched off although the permissible total current has not been exceeded.
Before lowering the response threshold, the motor current must always be measured and
the proper functioning of the motor and the gear unit checked.
Attention:
When a short circuit occurs that bypasses components on the decoder either to each other
or to track voltage, the overload protection is not effective.
xamples:
contact between the decoder and the rails or metal parts of the vehicle;
contact between not-isolated decoder connecting wires and the rails or metal parts of
the vehicle;
contact between accessories connected to the common return conductor of the decoder
and the rails or metal parts of the vehicle.
Attention:
Malfunctions of the locomotive motor (e.g. the so-called "sparking of the brushes") can
cause extreme interference current, possibly damaging components on the decoder. The
decoder´s overload protection is without effect with this extremely high current.
10 | Operation overview

tams elektronik LD-G-43
2.4. Motor control
Pulse width modulation
The LD-G-43 is designed to optimally control DC motors. With a PWM of 25 kHz, it is also
suitable for coreless motors.
Load control
The LD-G-43 has a load control. The load control influences the motor voltage to keep the
locomotive with a set speed level at constant velocity, independent of additional loads (e.g.
running up a gradient, coupled carriages).
It is possible to switch on and off the load control by varying a CV-variable of the decoder. The
parameters of the load control may be altered, in order to adapt the decoder to the motor´s
individual characteristics.
Parameters of the load control
The load control is determined by three parameters (KP, KI and KD) which have to be
coordinated in order to achieve optimal driving characteristics. ach of the load control
parameters is assigned to a configuration variable.
KP: The proportional component of the load control ensures the difference between the set
and the present value being as small as possible. It cannot have the value "0" at any time.
This component affects the basic speed. In case the set value is too small the locomotive runs
too slowly. In case the set value is too high the locomotive stutters while moving.
KI: The integral component of the load control ensures the remaining difference between the
set and the present value is reduced to 0 and so for the correction of very small divergences.
If the set value is too high the locomotive stutters massively while moving.
KD: The differential component of the load control ensures that the control is not converted
too quickly. If the set value is too low, the locomotive stutters. If it is too high, the locomotive
rocks while moving.
Gain factor
The basis for the influence of the load control on the motor voltage is the voltage returned by
the motor during the measuring period. Depending on the individual characteristics, these
values may be too high or too low. The effects are that the vehicle reaches its maximum
speed already at a speed level below the highest speed level or does not reach it at all at the
highest speed level. To compensate for these effects, the values sent by the engine can be
increased or decreased by adjusting the amplification factor.
Velocity characteristic
By adjusting the starting, middle and maximum speed, the decoder can be adapted to the
driving characteristics of the motor and the characteristic driving speeds of the locomotive
type. From these 3 points the decoder generates a speed characteristic curve which is linear
between the starting and middle speed and between middle and maximum speed.
When the speed level mode is set to 28 speed levels, it is possible to assign any motor voltage
to all of the 28 speed levels as an alternative to the linear velocity characteristic. This allows
the programming of a velocity characteristic which adjusts the individual driving characteristics
of the motor. The set values are saved in the alternative velocity characteristic.
Operation overview | 11

LD-G-43 tams elektronik
a: Linear characteristic from
start and maximum voltage
b: Linear characteristic from
start, medium and maximum
voltage
a: Linear characteristic from
start and maximum voltage
c: Shunting gear = 50 % of
the voltage defined in the
standard characteristic curve
a: Linear characteristic from
start and maximum voltage
d: alternative characteristic
with individual assignment of
voltage to the 28 speed
levels
Shuntin ear
With the function mapping, the special function "Shunting Gear" (SG) can be assigned to one
or more functions with which it is activated and deactivated. On delivery, the function F3 is
assigned to the special function "SG".
In the shunting gear mode, the velocity of all speed levels is reduced to approx. 50 %
compared to the set velocity.
Acceleration and brake delay
A well adjusted acceleration and brake delay (acceleration and brake rate) achieves a
prototypical, jerk-free acceleration and braking of the locomotive. For this purpose, in the CVs
is set separately for starting and braking, how much time should pass before the decoder
changes to the next higher or lower speed level. The decoder then changes the speed level
successively until the set speed level is reached. The higher the target speed or the speed
level when the braking process is triggered, the longer the starting and braking distance.
With the function mapping, the special function "Acceleration and Brake Delay" (ABD) can be
assigned to one or more functions with which it is activated and deactivated. On delivery, the
function F4 is assigned to the special function "ABD".
Starting and braking are
time-controlled:
The length of the starting and
braking distance depends on
the speed level to be reached
or the speed level when the
braking process is triggered.
Starting delay Braking delay
12 | Operation overview

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Constant brakin distance
When the brake delay is active, the length of the braking distance depends on the delay set in
the CV and on the speed level when the braking process is triggered. An exact stop at
stopping points is not possible.
For the LD-G-43 a constant braking distance can be defined, which the locomotive should
cover when changing from any speed level to speed level 0. The braking distance corresponds
to the distance that the locomotive covers with the set brake delay at the highest possible
speed level until it comes to a stop. If the braking process is triggered at a lower speed level,
the time until the change to the next lower speed level is automatically extended. This ensures
that the braking distance is always the same regardless of the speed level when the braking
process is started.
The length of the braking
distance is always the same,
regardless of the speed level
when the braking process is
triggered. The higher the
value set in CV 4 for the
braking rate, the longer the
braking distance.
Short braking distance:
low value in CV4
Long braking distance:
high value in CV4
Operation overview | 13

LD-G-43 tams elektronik
2.5. Automated processes
The control software in the locomotive decoder enables the automation of processes and the
combination of complex processes in one function. The processes can thus be activated with a
function / a function key.
2.5.1. ABC braking procedure
The LD-G-43 locomotive decoder, with the appropriate CV setting, detects when entering an
ABC braking section that an asymmetrical track voltage is present and then automatically
reduces the driving speed with the set brake delay or braking distance. It can be set to
respond to a reduced negative voltage (lower voltage on the right rail as seen in the direction
of travel) instead of a reduced positive voltage (lower voltage on the left rail as seen in the
direction of travel).
While the locomotive is in the braking section
the functions can be switched,
the CVs of the decoder can be changed by means of main track programming (PoM),
the direction of travel of the locomotive can be changed and thus the locomotive can be
shunted or driven out of the braking section in the opposite direction.
As soon as the braking section is released or the locomotive moves out of the braking section,
it accelerates with the set acceleration delay up to the set speed level.
Back round information: ABC brakin method (Automatic Break Control)
The ABC method is based on the fact that in the braking section, an asymmetrical voltage is
applied to the track instead of a symmetrical one. In order to be able to use the ABC braking
method, the booster must provide as symmetrical an output voltage as possible at the track
output. A special ABC-braking module reduces either the positive or the negative part of the
digital voltage for the braking section and thus generates an asymmetrical track voltage.
In principle, the braking section is only effective for one direction of travel at a time. While
the locomotive is in the braking section, all digital functions are maintained (switching of
outputs, PoM, change of direction). No short circuits occur when the locomotive crosses the
separation point between the normal section and the ABC braking section.
The normally symmetrical
digital voltage is reduced on
one side in the braking
section by a special ABC
braking module, as standard
on the right rail as seen in
the direction of travel.
Symmetrical track voltage
in the normal section
Asymmetrical track voltage
in the ABC braking section
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tams elektronik LD-G-43
For technical reasons, the track voltage applied to the output of some boosters is not 100 %
symmetrical. Some types of additional circuits that are connected to the track (e.g. track
occupancy detectors) also influence the track voltage on a rail. To prevent the locomotive
decoder from interpreting even a slightly unbalanced track voltage as an ABC braking section,
the sensitivity can be reduced.
Automatic shuttle train operation based on the ABC method
With the appropriate CV setting, the ABC braking procedure is used to automate shuttle train
operation between two terminal stations. When entering an ABC braking section, the
locomotive decoder automatically reduces the driving speed as usual with the set brake delay
or braking distance. After the stop, however, it changes the direction of travel and travels back
in the opposite direction with the set acceleration delay. When entering the ABC braking
section for the opposite direction, it automatically reduces the driving speed again.
2.5.2. Braking at DC voltage
The locomotive decoder LD-G-43 reacts to the application of a pure DC voltage (e.g. Märklin**
braking section) with the corresponding CV setting and then automatically reduces the driving
speed with the set brake delay or the set braking distance. In the braking section, the status
of the switched functions is retained. In contrast to the ABC braking method
the functions cannot be switched,
the CVs of the decoder cannot be changed,
the direction of travel of the locomotive cannot be changed.
As soon as the braking section is released or the locomotive moves out of the braking section,
it accelerates with the set acceleration delay up to the set speed level.
Back round information: Brakin with DC volta e
The braking method used e.g. by Märklin ("Märklin braking section") is based on the fact that
in the braking section, instead of an alternating positive and negative voltage, only a purely
positive or negative voltage is applied to the track. In order to prevent short circuits when
entering the braking section, an additional transition section must be inserted between the
"normal section" and the braking section, which must be a complete train length when used
in DC systems..
Symmetrical track voltage
in the normal section
Asymmetrical track voltage
in the transition section to
the braking section
Pure DC voltage in the
braking section
Operation overview | 15

LD-G-43 tams elektronik
2.5.3. Automatic uncoupling ("uncoupling waltz")
By programming the CV accordingly, the complete uncoupling process can be triggered with
one function.
After switching on the function, the locomotive first moves a little bit against the set direction
of travel in order to relieve the coupling. Then the function output to which the coupling is
connected is switched on for the set time. At the same time, the direction of travel is internally
changed back to the set direction and the motor voltage is switched on again. The locomotive
then moves a short distance away from the uncoupled wagon.
The following parameters of the automatic uncoupling can be set via CVs:
voltage that is applied to the motor during the uncoupling process
time period during which motor and output (coupling) are supplied with current (= kick
time)
2.5.4. Shunting function
Shunting gear and shunting light can be assigned to the same function. Then, when switching
to the shunting gear (and the associated reduction of speed), the shunting light (white front
and rear light) is switched on automatically. At the same time, the function that switches on
the shunting gear can be used to deactivate the acceleration and brake delay function.
xample of programming for shunting operation → section 5.4.
2.5.5. Speed-dependent switching on and off
All function outputs for which the function is activated are automatically switched when a
voltage defined in the associated CV is reached. It is possible
to switch the output off when the limit voltage is exceeded and to switch it on when the
voltage falls below the limit voltage or
to switch the output switch on when the voltage exceeds the limit and switch off when the
voltage falls below it.
The limit voltage is set for all outputs together.
2.5.6. Stop/Start with a function
With the function mapping, one or more functions can be assigned to the special function
"STOP/START with a function". When the assigned function is switched on, the locomotive
stops with the set braking delay; when it is switched off, it continues with the set acceleration
delay.
On delivery, no function is assigned to the special function "STOP".
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tams elektronik LD-G-43
2.6. Outputs and interfaces
Function outputs
The decoder has eight function outputs (F0f, F0r, AUX1 to AUX6) with a maximum current of
300 mA each for the connection of additional accessories (e.g. lighting, smoke generator,
electrical coupling). Note: The maximum total current of the decoder (including motor) is
1,500 mA.
Function mappin accordin to RCN-227
Assigning the functions to the outputs follows RailCommunity standard RCN-227. It is possible
to assign one or several outputs to each function (F0 to F28, seperately for forward and
backward motion for each function). In addition, it is possible to assign another function as an
"OFF"-switch to the functions.
This mode of function mapping allows to implement special features, e.g.:
Switching on and off depending on the direction of travel.
Shunting light: When switching to shunting operation the signals for shunting operation are
switched on and those for standard operation switched off.
Switching off the locomotive´s rear lights when connecting wagons.
Effects of the function outputs
Direction-dependent switchin : Assignment separately for each
output.
Function Mapping
Shuntin li ht: Assignment separately for each output. Function Mapping
Dimmin : The voltage at the output is reduced.
Assignment separately for each output.
Application example: By reducing the voltage, the lamps of older
vehicles intended for analogue operation can continue to be used in
digital operation and therefore do not have to be replaced after the
decoder has been installed.
CV programming
CV 47...54
Inverted switchin : When set to "on" the assigned output is
switched off, when set to "off" it is switched on.
Assignment separately for each output.
CV programming
CV 55...62
Flashin : The voltage at the output is switched on and off
alternately.
Assignment separately for each output. Setting the flashing
frequency together for two outputs.
By assigning the flashing function to two outputs and the function
"Inverted switching" to one of the two outputs, an alternating
flashing is generated.
CV programming
CV 55...62
CV 101...104
Operation overview | 17

LD-G-43 tams elektronik
Effects of the function outputs
Kickin : The output first receives full voltage for a maximum of
approx. 25.5 seconds and is then switched off.
Assignment separately for each output. Setting the kick time
(= time during which the maximum voltage is applied to the output)
together for all outputs to which the function is assigned.
Application example: Some types of electrical couplings require full
voltage for decoupling. After uncoupling, however, the voltage is
switched off to protect the couplings.
CV programming
CV 55...62
CV 99
Successive dimmin up and down: The voltage at the output is
gradually increased when switched on or gradually reduced when
switched off.
Assignment separately for each output. Setting the time duration for
dimming up and down together for all outputs to which the function
is assigned.
Application example: Simulation of old oil or incandescent lamps.
CV programming
CV 55...62
CV 100
Fire simulation: The voltage at the output is reduced / increased
in short, irregular intervals, connected L Ds or lamps produce the
flickering light typical for an open fire. Assignment separately for
each output.
Application example: Simulation of the fire in the firebox of steam
locomotives.
CV programming
CV 55...62
On/Off at a defined limit voltage (speed): By default, the output is
switched off when the limit voltage is exceeded and switched on
again when it falls below. The function can be reversed by inverting
the function.
Assignment separately for each output. Setting the limit voltage
together for all outputs to which the function is assigned.
Application example: automatic switching on and off of the driver's
cab lighting at a certain limit voltage.
CV programming
CV 55...62
CV 63
18 | Operation overview

tams elektronik LD-G-43
Output for buffer circuit
A special output is provided for the connection of a buffer circuit according to RCN-530 (e.g.
UPS-mini). Alternatively, it can be used to connect another consumer with a maximum current
of 100 mA.
By default, the output is switched on after a short waiting time after switching on the decoder
in order to load the buffer. The length of the waiting time varies randomly. This avoids that
several buffer circuits on the layout start the charging process at the same time immediately
after switching on and thus cause the collapse of the power supply.
With the function mapping, one or more functions can be assigned to this output, with which
the automatic charging of the buffer is activated and deactivated during operation. On
delivery, no function is assigned to the special function "UPS".
SUSI interface
The locomotive decoder LD-G-43 has a SUSI interface according to RailCommunity standard
RCN-600 in the version "classic SUSI", to which an external SUSI module (e.g. a sound
module) can be connected. The SUSI module is read out, programmed and controlled via the
decoder.
The locomotive decoder transmits the status of the functions and the speed level set at the
control unit to the SUSI module. This influences speed-dependent functions of the SUSI
module (e.g. the motor noise).
2.7. Triggering the actions
The switching on and off of the function outputs as well as the (de)activation of the special
functions is carried out
by the assigned function(s) and / or
automatically via the switching input. The switching input is triggered via external contacts,
e.g. via reed contacts or Hall sensors in combination with permanent magnets in the track.
Assi nment of actions to functions (function mappin )
The assignment of the actions controlled by the decoder to the functions is freely selectable,
separately for forward and reverse motion.
Actions DCC format MM format
Outputs F0f, F0r, AUX1 … AUX6 on/off
F0 to F28
F0 to F4
F5 to F8 with
2. Adresse
Uninterruptible power supply (UPS) on/off
Stop/start (STOP) with a function active/inactive
Shunting gear (SG) active/inactive
Acceleration and brake delay (ABD) active/inactive
Operation overview | 19

LD-G-43 tams elektronik
2.8. Feedback with RailCom
RailCom transmitter
The locomotive decoder LD-G-43 is a RailCom transmitter and fulfils the requirements of the
RailCommunity standard RCN-217 "RailCom DCC feedback protocol" for mobile decoders
(vehicle decoders).
Sending RailCom messages is possible in layouts with a DCC signal on the rails only. It is not
possible to use the RailCom-function in a pure Motorola environment.
Back round information: RailCom-messa es of vehicle decoders
In channel 1, the vehicle decoders transmit their DCC address after each DCC command
directed to any vehicle decoder. Channel 1 can be set "dynamically", i.e. the decoder will
only transmit its address in channel 1 until a DCC command is directed to it. This frees the
channel for the messages of other decoders to which no command has yet been sent or
which are not yet known to the system.
In channel 2, vehicle decoders send their feedback as soon as a DCC command is sent to
their address.
Back round information: Dynamic RailCom information
"Dynamic information" mean contents of CVs (RailComCVs 64 - 127) which change during
operation (e.g. real speed, reception statistics, tank content). If needed, they are sent by
the decoder spontaneously.
The reception statistics are kept by the vehicle decoder, and reported as number of faulty
data packages in relation to the total number of data packages. These statistics allow
conclusions on the transmission quality between vehicle and rails.
Dynamic RailCom information of the locomotive decoder
The locomotive decoder LD-G-43 can send the following dynamic RailCom information:
reception statistics
2.9. Automatic registration according to RCN-218 (DCC-A)
DCC-A is an automatic registration procedure for DCC, with which the essential characteristics
of a decoder are transmitted to the digital central unit immediately after the vehicle has been
rerouted and are directly available there. The assignment of addresses and the allocation of
functions is thus considerably simplified.
Notes for the use of DCC-A
Prerequisite for the use is the use of a digital central unit that also supports the procedure.
The automatic registration can be deactivated in CV 28. However, for trouble-free operation
with digital central units that do not support DCC-A, it is irrelevant whether the registration
procedure is activated or not.
20 | Operation overview