tams elektronik LD-G-21 User manual

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LD-G-21 n
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nAnleitung
nManual
Lokdecoder für Gleichstrommotoren
DCC-Format nMode d´emploi
Locomotive Decoder for DC engines
DCC format nHandleiding
Décodeur pour locomotive avec moteur continu
Format DCC n
Locdecoder voor gelijkstroommotoren
DCC-format n
Art.-Nr. 22-01-084 / 22-01-085 n

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nDeutsch 3
nEnglish 25
nFrançais 47
nNederlands 69
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© 01/2007 Tams Elektronik GmbH
Alle Rechte, insbesondere das Recht
der Vervielfältigung und Verbreitung
sowie der Übersetzung vorbehalten.
Vervielfältigungen und Reproduktionen
in jeglicher Form bedürfen der
schriftlichen Genehmigung durch die
Tams Elektronik GmbH.
Technische Änderungen vorbehalten.
© 01/2007 Tams Elektronik GmbH
All rights reserved. No part of this
publication may be reproduced or
transmitted in any form or by any
means, electronic or mechanical,
including photocopying, without prior
permission in writing from Tams
Elektronik GmbH.
Subject to technical modification.
© 01/2007 Tams Elektronik GmbH
Tout droits réservés, en particulier les
droits de reproduction et de diffusion
ainsi que le traduction. Toute
duplication ou reproduction sous
quelque forme que ce soit nécessite
l´accord écrit de la societé Tams
Elektronik GmbH.
Sous réserve de modifications
techniques.
© 01/2007 Tams Elektronik GmbH
Alle rechten voorbehouden. Niets uit
deze publicatie mag worden
vermenigvuldigd opgeslagen of
openbaar gemaakt, zonder
voorafgaande schriftelijke toestemming
van Tams Elektronik GmbH.
Technische wijzigingen voorbehouden. n

LD-G-21 English
Page 25
Table of contents
How to use this manual 25
Intended use 25
Safety instructions 26
EMC declaration 29
Operation overview 30
Technical specifications 34
Checking the package contents 35
Required tools and materials 35
Safe and correct soldering 35
Mounting the locomotive decoder 36
Programming the locomotive decoder 39
Improvement of the driving characteristics 43
FAQ 44
Manufacturer's note 45
Certification 45
Conditional warranty 45
Connections (Fig. 1 and 2) I
Circuit Diagram (Fig. 3) II
(Pages I to II in the centre of this handbook are removeable.)

English LD-G-21
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!
How to use this manual
Even if you have no specialist technical training, this manual gives step-
by-step instructions for safe and correct fitting of the module, and
operation. Before you start, we advise you to read the whole manual,
particularly the chapter on safety instructions and the FAQ chapter. 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 module on to another person, please pass on the manual
with it.
Intended use
The locomotive decoder is designed for mounting in a model train with
DC motor. It evaluates the DCC format data sent by the digital central
unit to its address and controls the locomotive´s motor and additional
functions.
The module should not be mounted or operated by children under the
age of 14.
Reading, understanding and following the instructions in this manual
are mandatory for the user.
Any other use is inappropriate and invalidates any guarantees.
Caution:
Integrated circuits (ICs) are inserted on the decoder. They are very
sensitive to static electricity. Do not touch components without first
discharging yourself. Touching a radiator or other grounded metal part
will discharge you.

LD-G-21 English
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Safety instructions
Mechanical hazards
Cut wires can have sharp ends and can cause serious injuries. Watch
out for sharp edges when you pick up the PCB.
Visibly damaged parts can cause unpredictable danger. Do not use
damaged parts: recycle and replace them with new ones.
Electrical hazards
§Touching powered, live components,
§touching conducting components which are live due to malfunction,
§short circuits,
§connecting the circuit to another voltage than specified,
§impermissibly high humidity,
§condensation build up
can cause serious injury due to electrical shock. Take the following
precautions to prevent this danger:
§Never perform wiring on a powered module.
§Mounting the module should only be done in closed, clean, dry
rooms. Beware of humidity.
§Only use low power for this module as described in this manual and
only use certified transformers.
§Connect transformers and soldering irons only in approved mains
sockets installed by an authorised electrician.
§Observe cable diameter requirements.
§After condensation build up, allow a minimum of 2 hours for
dispersion.
§Use only original spare parts if you have to repair the module.

English LD-G-21
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Fire risk
Touching flammable material with a hot soldering iron can cause fire,
which can result in injury or death through burns or suffocation.
Connect your soldering iron or soldering station only when actually
needed. Always keep the soldering iron away from inflammable
materials. Use a suitable soldering iron stand. Never leave a hot
soldering iron or station unattended.
Thermal danger
A hot soldering iron or liquid solder accidentally touching your skin can
cause skin burns. As a precaution:
§use a heat-resistant mat during soldering,
§always put the hot soldering iron in the soldering iron stand,
§point the soldering iron tip carefully when soldering, and
§remove liquid solder with a thick wet rag or wet sponge from the
soldering tip.
Dangerous environments
A working area that is too small or cramped is unsuitable and can cause
accidents, fires and injury. Prevent this by working in a clean, dry room
with enough freedom of movement.
Other dangers
Children can cause any of the accidents mentioned above because they
are inattentive and not responsible enough. Children under the age of
14 should not be allowed to work with this module.
Little children can swallow small components with sharp edges, with
fatal results! Do not allow components to reach small children.
In schools, training centres, clubs and workshops, assembly, mounting
and operation must be supervised by qualified personnel.
In industrial institutions, health and safety regulations applying to
electronic work must be adhered to.

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EMC declaration
This product is developed in accordance with the European standards
EN 55014 and EN 50082-1, tested corresponding to the EC - directive
89/336/EWG (EMVG of 09/11/1992, electromagnetic tolerance) and
meets legal requirements.
To guarantee the electromagnetic tolerance you must take the
following precautions:
§Connect the transformer only to an approved mains socket installed
by an authorised electrician.
§Make no changes to the original parts and accurately follow the
instructions, print layout and circuit diagram included with this
manual.
§Use only original spare parts if you have to repair the module.

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Operation overview
The decoder LD-G-21 is designed for operation in DCC format and can be
adjusted to one of 127 basic addresses or to one of 10.239 extended
addresses. It is designed to be controlled from digital control units that
are set on the 14-, 28 or the 128-speed mode.
The decoder can be programmed individually by setting the
configuration variables. It is possible to set all configuration variables
with central units which support the CV-programming. With central
units which only support the so-called register-programming the
number of the configuration variables that can be set is restricted.
Automatic recognition of the analogue mode
The decoder can also be used in analogue model railway layouts run with
a D.C. speed control. When putting the locomotive on the rails the decoder
recognizes automatically if it is run in analogue or digital mode and sets
the corresponding operation mode. The automatic recognition of the
analogue mode can be switched off by programming the decoder
accordingly.
The decoder is not suitable for analogue model railway layouts run with an
A.C. speed control.
The lighting is always switched on according to the direction of travel.
Switching on or off the lighting and the additional functions is not
possible.
The configuration variables of the LD-G-21
The following configuration variables (CVs) can be set from the digital
control unit:
§Basic address (CV#1)
§Starting voltage (CV#2)
§Acceleration rate (CV#3)
§Braking rate (CV#4)

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§Maximum voltage (CV#5) *1
§Version (CV#7) – read only
§Manufacturer identification (CV#8) - read only
§Extended address (CV#17 und CV#18) *1
§Configuration data 1 (CV#29)
§Assignment of the outputs X2 and X3 to the function keys F5 to F8
(CV#39 and 40) *1
§Configuration data 2 (CV#49) *1
§Dimming of the outputs X2 and X3 (CV#50 and C51) *1
§Proportional component of the load control “KP” (CV#54) *1
§Assignment of the outputs X2 and X3 to the function keys F0 to F4
(CV#55 and 56) *1
§Integral component of the load “KI” (CV#59) *1
§Effects for the outputs X2 and X3 (CV#60 and 61) *1
§Differential component of the load control “KD” (CV#64) *1
§Alternative velocity characteristic for mode 28 speed levels (CV#67
to 94) *1
*1 Not possible with central units with register programming!
Driving of the motor
The motor is driven with a PWM of 32 kHz. This guarantees a soft and
constant run of the motor. The decoder may also be used with coreless
(Faulhaber) motors as well.
Load control
At constant motor voltage, additional loads (e.g. running up a gradient,
coupled carriages) cause the locomotive to slow down or even come to
a standstill. If the load control is active the motor voltage varies to keep
the locomotive operating at constant velocity at a given speed level,
independent of additional loads.

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!
It is possible to switch on and off the load control by varying a CV-
variable of the deocder. The parameters of the load control may be
altered as well.
Attention:
For most locomotives you will achieve good driving characteristics with
the factory settings. Incorrect of the load control parameter settings
deteriorate the driving characteristics of the motor considerably.
Therefore you should first check the locomotive with the preset values
and modify the parameters of the load control only step-by-step.
Parameters of the load control: The load control is determined by
three parameters which have to be coordinated in order to achieve
optimal driving characteristics. Each of the load control parameters is
assigned to a configuration variable. The parameters are:
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.
KI: The integral component of the load control ensures the remaining
difference between the set and the present value being reduced to 0.
KD: The differential component of the load control ensures that the
control is not converted too quickly. Shaking and vibrating would be the
consequence.
Velocity characteristic
The decoder can be adjusted to the driving characteristics of the motor
and the characteristic speed of the locomotive type, by setting the
starting velocity and the maximum velocity. From the starting velocity
and the maximum velocity the decoder generates a linear velocity
characteristic.
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

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velocity characteristic which adjusts the individual driving characteristics
of the motor. The set values are saved in the alternative velocity table.
Shunting gear
In the speed modes 14 and 28, it is possible to switch into the shunting
gear mode via a function key, when so programmed. 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
It is possible to program the acceleration and brake delay individually
via the central unit.
Emergency stop
By setting a CV-variable it is possible to adjust how an emergency stop
is carried out. There are the following possibilities:
§no emergency stop possible,
§emergency stop at change of direction and / or
§emergency stop by operating of F1.
Function outputs
The decoder has two function outputs which can be switched on and
off via the function keys F0 to F8. They are available to connect
optional accessories with a current of max. 100 mA (e.g. lighting).
You can assign the function keys to the function outputs freely. It is
possible to assign several function keys to one function output.
Effects of the function outputs
It is possible to set the following effects for all function outputs
individually:
§Irregular flickering. Example of use: Flickering of the boiler fire by
steam engines.
§Strobe (flashing). Example of use: American locomotives with that
kind of lighting.

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§MARS light (swelling of the brightness). Example of use: American
locomotives with that kind of lighting.
§Switching on and off depending on the direction of travel.
§Flashing with a frequency of 2 Hz with two phases which are out-
of-phase by 180 degrees. Example of use: individual flash lights or
alternating flash lights.
§Flashing with a frequency of 1 Hz.
Technical specifications
Data format DCC
Supply voltage 12-24 Volt digital voltage
Current consumption
(without connected loads) approx. 10 mA
Max. current for motor 1.000 mA
Max. current per function output 100 mA
Max. total current 1.200 mA
Protected to IP 00
Ambient temperature in use 0 - + 60° C
Ambient temperature in storage -10 - + 80° C
Comparative humidity allowed max. 85 %
Dimensions approx. 22 x 17 x 6 mm
Weight approx. 1,8 g

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
Checking the package contents
Check the contents of the package for completeness immediately after
unpacking:
§one decoder, with or without soldered connecting wires resp.
soldered NEM 652 interface connector, depending on the version.
§one manual.
N.B. For technical reasons it is possible that the PCB is not completely
inserted. This is not a fault.
Required tools and materials
Make sure you have the following tools, equipment and materials ready
for use:
§an electronic soldering iron (max. 30 Watt) with a fine tip,
§a soldering iron stand,
§a tip-cleaning sponge,
§a heat-resistant mat,
§a small side cutter and wire stripper,
§a pair of tweezers,
§tin solder (0,5 mm. diameter),
§wire (diameter: >0,05 mm² for all connections).
Safe and correct soldering
Caution:
Incorrect soldering can cause dangers through fires and heat. Avoid
these dangers by reading and following the directions given in the
chapter Safety instructions.
§Use a small soldering iron with max. 30 Watt. Keep the soldering tip
clean so the heat of the soldering iron is applied to the solder point
effectively.

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§Only use electronic tin solder with flux.
§When soldering electronic circuits never use soldering-water or
soldering grease. They contain acids that can corrode components
and copper tracks.
§Solder quickly: holding the iron on the joints longer than necessary
can destroy components and can damage copper tracks or
soldering eyes.
§Apply the soldering tip to the soldering spot in such a way that the wire
and the soldering eye are heated at the same time. Simultaneously add
solder (not too much). As soon as the solder becomes liquid take it
away. Hold the soldering tip at the spot for a few seconds so that the
solder flows into the joint, then remove the soldering iron.
§The joint should be held still for about 5 seconds after soldering.
§To make a good soldering joint you should use a clean and
unoxidised soldering tip. Clean the soldering tip with a damp piece
of cloth, a damp sponge or a piece of silicon cloth.
§After soldering check (preferably with a magnifying glass) tracks for
accidental solder bridges and short circuits. This would cause faulty
operation or, in the worst case, permanent damage. You can
remove excess solder by putting a clean soldering tip on the spot.
The solder will become liquid again and flow from the soldering
spot to the soldering tip.
Mounting the locomotive decoder
Before mounting the decoder check if the locomotive motor´s current is
below the maximum permissible value of 1.000 mA. If it is above 1.000
mA the decoder is not suitable for mounting in this locomotive. It would
be damaged when put into operation.

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!
!
Connecting the motor
Open the locomotive housing. Locate the position for the decoder.
Disconnect the motor from the rail current collector.
Caution:
The interference suppression devices mounted to the motor or the
connecting wire must not be removed! Motor and interference
suppression devices are one unit. If even one part is removed, it can
cause extreme interference!
Follow the connection diagram fig. 1. Solder the connections from the
rail current collectors at the points X1 and X7.
Next solder the connections from the motor at the points X9 and X10. In
case the locomotive´s direction of motion in analogue mode does not
match the direction of motion set at the speed control you have to
swap the connections to the points X9 and X10.
Connecting the lighting
Before connecting the lighting check if the current is below the
maximum permissible value of 100 mA. If lightings or other accessories
with a current of more than 100 mA are connected the decoder will be
damaged when put into operation.
Disconnect any existing diodes in the leads to the lamps. Follow the
connection diagram fig. 1 and fig. 2.
Connect the lamps to the function outputs X2 to X3. The assignment of
the function outputs to the function keys will be made when
programming the decoder. If the lamp or the accessory is already
connected with one side to locomotive ground, the connection is
complete. If not, connect the second side of the lamp or the accessory
to the return conductor of the decoder (point X4).

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!
!
!
If you want to use the decoder factory settings, you have to connect
the lighting and the accessories as follows:
Front lighting: X2
Back lighting: X3
Caution:
If you connect the loads to the return conductor for all functions (point
X4), the loads must be insulated. The loads should not make contact
with metal parts of the locomotive. Possible short circuit! The
locomotive decoder will be damaged in operation.
Caution:
The return conductor for all functions (point X4) must under no
circumstances be connected to locomotive ground. Possible short
circuit! The locomotive decoder will be damaged in operation.
Tip: Before starting to program the locomotive decoder you should
connect the motor to the decoder. Otherwise there is no confirmation
signal from the central unit.
Connecting the LEDs
The function outputs of the locomotive decoder switch against decoder
ground. For that reason you must connect the cathode (-) of the LED to
the output of the relevant function.
Caution:
If you use light-emitting diodes (LEDs) you must always operate them
via a series resistor. LEDs are available in many different models. The
series resistor limits the current flow of the LED and will need to be
calculated for each model. Ask for the max current rating when buying
your LEDs.
You can connect several LEDs in parallel to each output. In this case
every LED must have a series resistor of its own. If you connect several
LEDs to one output in series, only one series resistor is needed.

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Fixing the locomotive decoder
After completing all connections fix the locomotive decoder with double-
sided adhesive tape, for example.
Using a NEM 652 interface connector
Some locomotives already have an NEM 652 interface connector
mounted. Using a convenient connecting plug you save disconnecting
the connections and you do not need to solder at the locomotive.
The list below shows how to connect the contacts of the interface
connector to the connecting points of the locomotive decoder.
Contact Connection Colour of cable Connecting points
1Motor connection 1 orange X10
2Lighting back (-) yellow X3
3Not used or F1 green ---
4Power supply left black X7
5Motor connection 2 grey X9
6Lighting front (-) white X2
7Common conductor
for all functions (+) blue X4
8Power supply right red X1
Programming the locomotive decoder
The locomotive decoder is programmed from the digtial central. See
the chapter in the manual of your digital control unit where the
programming of configuration variables (CVs) is explained.
You can programm resp. read out the following locomotive decoder
variables:
NB. With central units with register-programming it is only possible to
program the variables CV#1 to CV#4 (= register 1 to 4) and CV#29 (=
register 5).

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CV-name CV-
no. Input value /
(State of
delivery)
Remarks
Basic
address 11 ... 127
(3)
Starting
voltage 20 ... 255
(5) =The voltage to be output to the
motor at speed level 1.
The value "0" corresponds to 0
Volt, the value "255" to the max.
voltage.
Acceleration
rate 30 ... 255
(18) =Length of the delay before the
switching to the next higher
speed level when the locomotive
is accelerating.
The delay is calculated as follows:
(value of CV#3) x 0,9 sec. /
number of speed levels
Braking
rate 40 ... 255
(5) =Length of the delay before the
switching to the next lower speed
level when the locomotive is
braking. The delay is calculated
as described in CV#3.
Maximum
voltage 50 ... 255
(0) =The voltage to be output to the
motor at the highest speed level.
The value "2" corresponds to 0,8
%, the value "255" to 100 % of
the max. voltage.
Version 7--- Read only!
Manufacturer 8--- Read only!

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CV-name CV-
no. Input value /
(State of
delivery)
Remarks
Reset 80 ... 255 Any value restores the settings
in state of delivery.
Extended
adress 17
18 1 ... 10239 (-) Numerical value *2
Direction "standard" 0
Reverse direction 1
14 speed levels 0
28 or 128 speed levels 2
Analoge recognition off 0
Analoge recognition on 4
Linear
velocity characteristic 0
Alternative
velocity characteristic 16
Basic adress 0
Configuration
data 1 29 (6)
Extended adress 32
Assignment 0 ... 15 Numerical value *2
F5 – F8 to (0) Operation with:
the outputs: --- 0
X2 39 function key F5 1
X3 40 function key F6 2
function key F7 4
function key F8 8

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CV-name CV-
no. Input value /
(State of
delivery)
Remarks
Numerical value *2
Load control active 1
Emergency stop at
change of direction 2
Emergency stop at F1 4
Shunting gear mode at F1 8
Shunting gear mode at F2 16
Shunting gear mode at F3 32
Configuration
data 2 49 0 ... 127
(1)
Shunting gear mode at F4 64
Dimming of
the outputs::
X2 50
X3 51
0 ... 63
(63) =The voltage that is applied to
the output.
The value "1" corresponds to
the minimum, „63“ to the
maximum voltage.
Parameter of
load control KP 54 0 ... 255
(96) =Proportional component of
the load control.
Assignment 0 ... 31 Numerical value *2
F0 – F4 to (0) Operation with:
the outputs: --- 0
X2 55 (16) function key F1 1
X3 56 (16) function key F2 2
function key F3 4
function key F4 8
function key F0 16
Parameter of
load control KI 59 0 ... 255 (22) =Integral component of the load control.