TAMS Elektronik series 30 plus User manual

Manual

Locomotive decoders

series 30

plus

LD-G-31

plus

Item 41-03310
Item 41-03312
Item 41-03313

LD-G-33

plus

Item 41-03330
Item 41-03332
Item 41-03333
Item 41-03334

LD-G-34

plus

Item 41-03340
Item 41-03341
Item 41-03342

LD-G-36

plus

Item 41-03360x
Item 41-03362x
Item 41-03363x
Item 41-03364x

tams elektronik

n n n

DCC MM

English Locomotive decoders of the series 30 plus

Contents

1. Getting started............................................................................6

2. Safety instructions.......................................................................9

3. Safe and correct soldering.........................................................12

4. Operation overview...................................................................13

4.1. Modes of operation............................................................13

4.2. Driving of the motor..........................................................15

4.3. Function outputs...............................................................17

4.4. Sound functions................................................................18

4.5. Releasing the functions......................................................20

4.6. Automated processes.........................................................21

4.7. Feedback with RailCom** and RailCom plus **...................23

4.8. Overload protection (except LD-G-31 plus).........................24

4.9. POM-update (except LD-G-36 plus)....................................25

5. Technical specifications..............................................................26

6. Connections..............................................................................29

6.1. Connector pin assignment LD-G-31 plus (PluX12)................30

6.2. Connector pin assignment LD-G-33 plus (PluX22)................32

6.3. Connector pin assignment LD-G-33 plus (21MTC, 21-pole)...34

6.4. Connector pin assignment LD-G-34 plus..............................36

6.5. Connector pin assignment LD-G-36 plus (PluX22)................38

6.6. Connector pin assignment LD-G-36 plus (21MTC, 21-pole)...40

6.7. Using decoders with interface connectors...........................43

6.8. Use in locomotives with a.c. motor.....................................44

6.9. INFO: Earth connections and voltage outputs......................45

6.10.Mounting decoders without interface..................................46

6.11.Connecting LEDs to the function outputs............................48

6.12.Connecting inductive loads.................................................50

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Locomotive decoders of the series 30 plus English

6.13.Connecting accessories via a relay......................................50

6.14.Connecting a loudspeaker..................................................51

6.15.Connecting a buffer capacitor.............................................51

6.16.Connecting a servo (not with LD-G-31)...............................52

6.17.Connecting the switching inputs.........................................53

6.18.Connecting a SUSI module (except LD-G-31 plus)...............55

6.19.Connecting a clock generator to the LD-G-36 plus...............55

6.20.Fixing the decoder.............................................................55

7. Programming............................................................................56

8. Configuration variables and registers..........................................59

9. Performing a POM-Update.........................................................82

10. Check list for troubleshooting.....................................................84

11. Guarantee bond........................................................................88

12. EU declaration of conformity......................................................89

13. Declarations conforming to the WEEE directive...........................89

© 11/2015 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.

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English Locomotive decoders of the series 30 plus

The asterisks **

RailCom® is the registered trademark of:
Lenz Elektronik GmbH | Vogelsang 14 | DE-35398 Gießen

RailComPlus® is the registered trademark of:
Lenz Elektronik GmbH | Vogelsang 14 | DE-35398 Gießen and
ESU electronic solutions ulm GmbH & Co. KG | Edisonallee 29 |
DE-89231 Neu-Ulm

To increase the text´s readability we have refrained from refering to
this point in each instance.

This manual mentions the following companies:
Gebr. MÄRKLIN & Cie. GmbH | Stuttgarter Str. 55-57 |DE-73033 Göppingen
Uhlenbrock Elektronik GmbH | Mercatorstraße 6 | DE-46244 Bottrop

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Locomotive decoders of the series 30 plus English

1. Getting started

This manual applies to all locomotive decoders of the series 30 plus, so
for:

 locomotive decoder LD-G-31 plus,
 locomotive decoder LD-G-33 plus,
 locomotive decoder LD-G-34 plus,
 sound locomotive decoder LD-G-36 plus.

Provided there are no other details given for particular sections, the
information given applies to all decoders.

How to use this manual

This manual gives step-by-step instructions for safe and correct fitting and
connecting of the decoder, and operation. Before you start, we advise you
to read the whole manual, 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.

Intended use

The locomotive decoders of the series 30 plus are 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 decoders 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.

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English Locomotive decoders of the series 30 plus

Checking the package contents

Please make sure that your package contains:

 one or five locomotive decoders, depending on the version with or

without soldered connecting wires resp. with or without interface
connector;

 LD-G-31 plus: one or five buffer electrolytic capacitors (100 µF / 35 V);
 LD-G-33 plus, LD-G-34 plus, LD-G-36 plus: one or five buffer

electrolytic capacitors (220 µF / 35 V);

 LD-G-31 plus, LD-G-33 plus, LD-G-34 plus: one or five suppression

chokes (470 µH / >90mA);

 a CD (containing the manual, Software "POM-Updater.exe" and

further information).

N.B. For technical reasons it is possible that the PCB is not completely
inserted. This is not a fault.

Available versions

Connecting wires /
Interface

LD-G-31

plus

LD-G-33

plus

LD-G-34

plus

LD-G-36

plus

without wires *

1

+ + + +

with wires *

1

– – + –

according to NEM 650*18-pole

(NEM 652)

8-pole

(NEM 652)

8-pole

(NEM 652)

8-pole

(NEM 652)

according to NEM 658 PluX12 PluX22 – PluX22

according to NEM 660 – 21MTC – 21MTC

similar to NEM 660 – 21-pole*

2

(4 amplified

outputs)

– 21-pole

(4 amplified

outputs)

*1 connections according to version with PluX interface
*2 in preparation (status 11/2015)

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Locomotive decoders of the series 30 plus English

Required materials

For mounting and connecting decoders without interface you need:

 an electronic soldering iron (max. 30 Watt) or a regulated soldering

iron with a fine tip and a soldering iron stand,

 a tip-cleaning sponge,
 a heat-resistant mat,
 a small side cutter, a wire stripper and a pair of tweezers,
 electronic tin solder (0.5 mm diameter).

In order to connect decoders without interface or soldered connecting
wires you will need wire. Recommended cross sections:

 > 0,04 mm² for the connections to the function outputs;
 > 0,05 mm² for the connections to the motor and current collectors

(except for the LD-G-34 plus);

 > 0,14 mm² for connections to the motor and current collectors of

the LD-G-34 plus.

For playing back the sounds you need:

 a loudspeaker with an impedance of min. 4 Ohm and a rated load-

carrying capacity of min. 0,1 Watt.

If you want to trigger switching operations automatically, e.g.:

 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);

 for the connection via the SUSI connector plug of the deocder: a

SUSI socket with wires (e.g. item no. 70-01111).

If you want to use the output for the servo:

 one servo,
 a voltage supply for the servo (e.g. servo PCB item-no. 70-05900).

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As a clock generator for the sound locomotive decoder LD-G-36 plus
(e.g. to control the correct syncronisation of the steam discharge with
the wheel movements):

 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).

If you want to connect the decoder to an a.c. motor:

 a load control adapter LRA (item no. 70-02105 or 70-02106) or
 a permanent magnet (e.g. item no. 70-04100, 70-04200 or 70-

04300) or

 a motor modification set (e.g. item no. 70-40110, 70-40210 or

70-40310).

2. Safety instructions

Caution:

Integrated circuits (ICs) are inserted on the decoder. They are
sensitive to static electricity. Do not touch components without first
discharging yourself. Touching a radiator or other grounded metal part
will discharge you.

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.

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Locomotive decoders of the series 30 plus English

Electrical hazards

 Touching powered, live components,
 touching conducting components which are live due to malfunction,
 short circuits and connecting the circuit to another voltage than

specified,

 impermissibly high humidity and 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.
 Assembling and mounting the kit 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 kit or the

ready-built module.

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.

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English Locomotive decoders of the series 30 plus

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 kit or the ready-built
module.

Caution:

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 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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Locomotive decoders of the series 30 plus English

3. 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.

 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.

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English Locomotive decoders of the series 30 plus

4. Operation overview

4.1. Modes of operation

Digital operation

The locomotive decoder is a multiple protocol decoder, that can operate
with and automatically recognise both DCC or Motorola formats.

The number of addresses is dependant on the format being used:

 Motorola-Format: 255 addresses,
 DCC-Format: 127 Basis-addresses or 10.239 extended addresses.

In the DCC format the decoder can be driven in all speed levels (14, 28
or 128). In the Motorola format the decoder can be driven in 14 or 27
speed levels. Driving all 27 speed levels can be done only with central
units which support this mode (e.g. MasterControl). With central units
which allow 14 speed levels only, it is only possible to select every
second speed level.

Programming the decoders is done:

 in Motorola format by setting the registers,
 in DCC format by setting the configuration variables (direct

programming, DCC conform) or by POM (programming on main =
main track programming). Note: The configuration variables
reserved for the SUSI interface ## 897 – 1024 cannot be
programmed by POM.

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Locomotive decoders of the series 30 plus English

Analogue mode

The locomotive decoder can also be used in analogue model railway
layouts run with a D.C. or A.C. speed control. 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 recognition of the analogue mode can be switched off.

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 excess voltage impulses when changing the driving direction.
When using them with the modern supply voltage of 230 V too high
excess voltage impulses can occur, damaging electronic parts on the
decoder. For that reason only use driving transformers designed for a
net voltage of 230 V.

Switching the function outputs on or off is not possible in analogue
mode. They can be programmed 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 to be switched with F0 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.

The decoders´ load control is also active in analogue mode. The set
maximum speed also limits in analogue mode the maximum speed of the
locomotive.

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English Locomotive decoders of the series 30 plus

4.2. Driving of the motor

Pulse width modulation

The pulse width modulation (PWM) of the locomotive decoder can be
set to a value between 60 Hz and 30 kHz. This enables you to adjust
the decoder individually to the different motor types, including coreless
motors.

Load control

The decoder 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 CV­variable 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 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. 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.

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Locomotive decoders of the series 30 plus English

KD: The differential component of the load control ensures that the
control is not converted too quickly. Is the set value to low then the
locomotive stutters. If the set value is too high, the locomotive rocks
while moving.

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, medium and maximum velocity. From these three settings the
decoder generates a (where required turned) 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
velocity characteristic which adjusts the individual driving characteristics
of the motor. The set values are saved in the alternative velocity table.

Shunting gear

It is possible to switch into the shunting gear mode via a function key
(in state of delivery F3), 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. When so programmed, it can be switched on and
off with a function key (in state of delivery F4).

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English Locomotive decoders of the series 30 plus

4.3. Function outputs

The decoder has function outputs, which are available to connect
optional accessories (e.g. lighting, smoke generator, sound module,
electric coupling). The accessories´ number and type to be connected
depends on the outputs´number and maximum current as well as on
the maximum total current of the special decoder (see section 5
"Technical specifications").

Effects of the function outputs

It is possible to set the following effects for the function outputs
(except AUX7) individually:

 Switching on and off depending on the direction of travel.
 Flashing and double flashing. Both the frequency and the keying

ratio can be set. E.g. single and double flash lights or strobe lights.

 Kick function: It is possible to set the amplified function outputs so

that they get the full voltage first for up to 12,5 seconds and then
are switched off. Example of use: For some types of electric couplings
you need the full voltage for decoupling and the voltage then switched off
to protect the couplings.

 Shunting light: You can program the outputs so that they are

switched on generally during shunting operation (to be switched with
F3 or F4). The dependence on the direction of travel will be nullified
for these outputs during shunting operation.

 Special function for speed level 0: It is possible to program one

function to switch off other functions or switch on special function
outputs at speed level 0. Example of use: In some locomotive sheds
it is customary that the tail lamps of parked locomotives have to be
temporally set at the front and the back.

 Dimming: Example of use: The electric bulbs of older vehicles made

for analogue operation can be dimmed and thus must not be
exchanged after the mounting of the decoder.

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Locomotive decoders of the series 30 plus English

 Dimming depending on the speed level: The voltage will be dimmed

depending on the speed level. This enables weak smoke generation
during halts or a switched off or dimmed cab lighting while the train is
moving.

 MARslight (= light intensity going up and down): Example of use:

american locomotives with this type of lighting.

Servo output (except LD-G-31 plus)
The decoders LD-G-33 plus, LD-G-34 plus and LD-G-36 plus have an

output sending the signals to control a servo. The voltage supply for
the servo cannot be provided by the decoder. For that reason an
external voltage supply (e.g. servo PCB item-no. 70-05900) is required.

The servo is controlled by:

 setting the end positions via CVs and controlling by pushing the

function keys ("on" = end position 1 , "off" = end position 2) or

 input of a value for the folding square by POM, which allows to

approach to any folding square.

4.4. Sound functions

SUSI interface (except LD-G-31 plus)
A SUSI module can be connected to the locomotive decoders LD-G-33

plus, LD-G-34 plus and LD-G-36 plus and read out, programmed and
controlled via the decoder.

The decoder transmits the function status and the speed level set at the
central unit, to the SUSI module. This affects the SUSI module´s
outputs depending on the speed level (e.g. motor sound). The decoder
allows the setting of the acceleration and braking delay so that the
functions depending on the speed level correspond to the driving
characteristics during accelerating and braking.

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English Locomotive decoders of the series 30 plus

Integrated sounds (except LD-G-36 plus)
The locomotive decoders LD-G-31 plus, LD-G-33 plus and LD-G-34 plus

have three integrated sounds:

 locomotive whistle,
 bell,
 signal horn.

Driving sound (LD-G-36 plus only)
You can trigger different sounds via the digital control unit´s function

keys (standing and driving sound, signal horn or locomotive whistle,
decoupling or door closing sound, bell or second signal horn). The
function keys can be assigned freely to the sounds.

Four sounds typical for a locomotive type are saved on an IC in the
decoder. They are recordings of original sounds of the vehicle
examples. Before delivery the module is programmed with sounds from
a sound data base. Using a special programming device (Tams sound
programmer, item no. 70-03200) allows to alter the decoder´s
programming.

A clock generator (e.g. Hall sensor or reed contact in combination with
a magnet) allows to control for example the correct synchronising of
the steam discharge with wheel movement.

Possible settings
The settings in state of delivery can be adjusted by changing the

configuration variables:

 volume;
 steam discharge of steam locomotives;
 length of the breaks between signal sounds;
 release thresholds at change of motor load, for breaking sound and

for ventilator sound of electric locomotives;

 fading time (= period of time of fading in and down when switching

on and off);

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Locomotive decoders of the series 30 plus English

 sensitivity to load changes;
 time of no-load running;
 assignment of the sounds to the function keys.

4.5. Releasing the functions

The function outputs, the servo output, the integrated sounds and with
the LD-G-36 plus the driving sounds can be released by:

 pushing the function keys and / or
 automatically via the two switching inputs. The switching inputs are

released via external contacts, e.g. via reed contacts or Hall sensors
in combination with permanent magnets in the rails.

Hint for locomotive decoder LD-G-33 plus: When there is connected a
SUSI module, the switching inputs are not available.

Hint for locomotive decoders LD-G-34 plus and LD-G-36 plus: The
sounds of a connected SUSI module can be triggered by the function
keys as well as by the switching inputs that are assigned to these
function keys. .

Mapping of the outputs to the function keys

The mapping of the outputs to the function keys and the switching
inputs is arbritary. It is possible to assign several function keys and
switching inputs to one output.

Output DCC format MM format
F0f / F0r F0 to F12 F0 to F4 or

F5 to F9

(= F0 to F4 of a
second decoder
address)

AUX1 to AUX6

(LD-G-31 plus: AUX1 to AUX2)

F0 to F28

AUX7 (versions with connections

according to PluX only, except LD-G-31 plus)

F13 to F28

All function outputs can be switched inverted, i.e. when set to position
"on" the assigned function output will be switched off, when set to
position "off" switched on.

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English Locomotive decoders of the series 30 plus

4.6. Automated processes

The control software in the locomotive decoder allows you to automate
procedures and to reduce complex processes to one keystroke.

Automatic commuting operation

It is possible to install an automatic commuting operation between two
terminal stations, via the switching inputs. You can assign a function
key to the automatic commuting operation, in order to switch it on or
off during operation.

Sequence: As soon as the switching input has been released (e.g. by a
magnet in the track in combination with a Hall sensor or a reed
contact), the locomotive breaks with the set brake delay. After the set
stop time the locomotive starts with the set acceleration delay.
Depending on the settings, the direction of motion is altered internally
and the locomotive runs back into the opposite direction or goes on in
the same direction.

When so programmed, closing one of the switching inputs on the main
track between the terminal stations will be ignored by the commuting
automatic and can be used to trigger any function during commuting
operation. Please note, that always all active functions assigned to the
switching input are released as soon as the switching input is closed.
The second switching input can be used to release additional stops on
the commuting line.

Possible settings for CV programming:

 length of the stop time (0 to max. 160 seconds), either commonly

for both directions or separately for advancing and reversing;

 whether a change of direction has to be performed after a stop;
 switching off the commuting automatic with function key F5 to F12;
 number of switching impulses between two terminal stations to be

igrnored (and not releasing the braking for terminal station).

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Locomotive decoders of the series 30 plus English

Dimming depending on the velocity

You can automatically switch functions depending on the velocity when
reaching a speed level defined in a CV. You assign an individual voltage
to the function outputs for the ranges of speed levels underneath and
above the defined speed level. This allows for example to switch on and
off the high beam light, to control the cab light or to influence the
intensity of the steam output.

Shunting function

You can assign the shunting gear and the shunting light to the same funtion
key. That way you switch on the shunting light automatically when
switching into the shunting gear (and thus reducing the velocity).

Special function for speed level 0

By programming the special function for speed level 0 you can switch
on or off several function outputs and functions at the same time, you
otherwise had to switch singularly. This allows e.g. to switch off several
lights at once when parking a locomotive in the depot (e.g. front and
back lights, cab light and undercarriage light).

Automatic coupling and decoupling

With an appropriate CV-programming you can release coupling and
decoupling operations automatically with one function key. In order to
use the automatic coupling function you have to assign one function
key to each of the directions "forward" and "backward". In order to
couple the locomotive drives with the velocity set in a CV against the
carriage to be coupled. As soon as the assigned switching input has
been connected to earth (e.g. via a current transmitting coupling), the
locomotive stops. After having coupled, the primary driving direction is
set again.

For decoupling the locomotive first runs a small distance against the set
driving direction, in order to relieve the coupling. The function output
connected to the coupling is switched on. In order to prevent the

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English Locomotive decoders of the series 30 plus

coupling from damage, the current is switched off automatically after
the set time. The driving direction is changed over to the set direction
of motion and the locomotive drives away a small distance from the
decoupled carriage.

4.7. Feedback with RailCom** and RailCom plus **

RailCom is a log for bi-directional communication in digital model
railway layouts controlled in DCC-format. It allows e.g. the feedback of
the address and the CV values from the decoder to the digital central
unit or to special receivers (so-called detectors). The decoders must be
designed to send the RailCom messages.

When so programmed, the locomotive decoders of the series 30 plus send
(continuously) the (basic, extended or consist) address to the detectors (so­called RailCom broadcast datagramm) and transfer a CV message after a
DCC CV read-out command.

Sending RailCom messages is only possible in layouts with a DCC signal
on the rails. It is not possible to use the RailCom-function in a pure
Motorola environment.

RailComPlus enables the decoder to log in automatically at the digital
control unit. In doing so the locomotive address and name as well as
the functional mode and range are transmitted. The precondition for
using RailComPlus is using a control unit providing this type of
feedback.

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Locomotive decoders of the series 30 plus English

4.8. Overload protection (except LD-G-31 plus)

The locomotive decoders LD-G-33 plus, LD-G-34 plus and LD-G-36 plus
have an overload protection, which prevents them from overheating
when exceeding the maximum motor or total current.

As soon as the maximum motor or total current is exceeded, the
decoder automatically temporarily switches off. This operation will be
repeated until the overload has been eliminated.

When exceeding the maximum current at the output only (but not the
total current of the decoder) the decoder´s overload protection is
without effect, the concerned output will be damaged.

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. Examples:

 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.

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English Locomotive decoders of the series 30 plus

4.9. POM-update (except LD-G-36 plus)

POM-update is a procedure allowing to update the decoder´s firmware
(= specific decoder software) without dismounting the decoder or using
a specific device. POM-update is based upon programming on main
(POM) for the DCC format.

Preconditions for using the procedure are:

 Locomotive decoder LD-G-31 plus from version 2.4,

locomotive decoder LD-G-33 plus from version 2.5 or
locomotive decoder LD-G-34 plus from version 2.5.

 Digital central unit with PC interface providing the DCC format and

POM. Hint: As nearly every manufacturer of central units uses his
own procedure for programming on main, the POM-update can be
performed with the following central units only (status 01/2015):

MasterControl (Tams Elektronik)
Intellibox 1 (Uhlenbrock**)
CS2 (Maerklin**)

The current list of central units allowing to perform the POM-update
is available on our homepage.

 PC. The system software must support Java.
 Software "POM-Updater.exe": You will find it on the CD included in

delivery. It is also available on our homepage for free download.

You can download the current firmware version of the decoder free of
charge from our homepage. If you want to get information on new
firmware versions please subsribe to our newsletter on our hompage.

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Locomotive decoders of the series 30 plus English

5. Technical specifications

Data format DCC and MM

Feedback log RailCom and RailCom plus

Supply voltage Digital voltage: 12-24 V

LD-G-31 plus: 12-18 V
Analogue voltage: max. 18 V

Current consumption
(without connected loads) max. 40 mA

Output for servo (except LD-G-31 plus)
max. current for servo output

1
5 mA

Output for loudspeaker | Playback
Impedance
Rated load-carrying capacity

1 | mono
> 8 Ohm
> 0,1 Watt

Number of switching inputs 2

Connection for buffer capacitor
Capacity:

- for LD-G-31 plus

- for LD-G-33, LD-G-34, LD-G-36 plus
Proof voltage

- in analogue a.c. layouts

1

100 to 470 µF
220 to 1.000 µF

> 25 V
> 35 V

Interfaces

depending on the decoder type and the version

according to NEM 652, 658,
660 or 21-pole (similar to NEM 660);

SUSI (except LD-G-31)

Protected to IP 00

Ambient temperature in use 0 ... +60 °C
Ambient temperature in storage -10 ... +80 °C

Comparative humidity allowed max. 85 %

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English Locomotive decoders of the series 30 plus

Max. total current [mA]

Max. current for motor [mA]

Number of outputs

Max. current / output [mA]

Max. current / output [mA]

Dimensions PCB [mm]

Weight [g]

LD-G-31 plus

without
wires

1 200 600 4 300 --- 19.5x9x4.5 1,0

NEM 652 1 200 600 4 300 --- 19.5x9x4.5 3,0

PluX12 1 200 600 4 300 --- 19.5x9x7.5 1,2

LD-G-33 plus

without
wires

1 500 1 000 9

F0f, F0r,

AUX1 – AUX6:

500

AUX7:

100

25.5x15.5x5 2,0

NEM 652 1 500 1 000 9

F0f, F0r,

AUX1 – AUX6:

500

AUX7:

100

25.5x15.5x5 5,0

PluX22 1 500 1 000 9

F0f, F0r,

AUX1 – AUX6:

500

AUX7:

100

25.5x15.5x7.5 2,5

21MTC 1 500 1 000 8

F0f, F0r,

AUX1, AUX2:

500

AUX3

-AUX6:

10

25.5x15.5x5 2,2

21-pole 1 500 1 000 8

F0f, F0r,

AUX1 - AUX4

500

AUX5,
AUX6:

10

25.5x15.5x5 2,2

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Locomotive decoders of the series 30 plus English

Max. total current [mA]

Max. current for motor [mA]

Number of outputs

Max. current / output [mA]

Max. current / output [mA]

Dimensions PCB [mm]

Weight [g]

LD-G-34 plus

without
wires

3 000 3 000 8 500 --- 27x17x6 3,0

with
wires

3 000 3 000 8 500 --- 27x17x6 5,0

NEM 652 3 000 1 500 8 500 --- 27x17x6 6,0

LD-G-36 plus

without
wires

1 500 1 000 9

F0f, F0r,

AUX1 - AUX6:

500

AUX7:

100

34.5x16x6 3,2

NEM 652 1 500 1 000 9

F0f, F0r,

AUX1 - AUX6:

500

AUX7:

100

34.5x16x6 5,2

PluX22 1 500 1 000 9

F0f, F0r,

AUX1 - AUX6:

500

AUX7:

100

34.5x16x6 3,5

21MTC 1 500 1 000 8

F0f, F0r,

AUX1, AUX2:

500

AUX3

-AUX6:

10

30x15.5x5 3,2

21-pole 1 500 1 000 8

F0f, F0r,

AUX1 - AUX4:

500

AUX5,
AUX6:

10

30x15.5x5 3,2

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