Tran GE70 User Manual

User Manual

Sound decoder GE70

Suitable for N – I scale

21x14x5mm

0.85 x 0.55 x 0.2 inch

(L x W x H)

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INHALT

1. Overview.....................................................................................3

2. Technical specifications..............................................................4

2.1. Connection diagram....................................................................4

3. Safety instructions ......................................................................5

4. Connections................................................................................6

4.1. Connection diagram for steam loco............................................6

5. Programming and taking into use...............................................7

5.1. Basic functionality.......................................................................7

5.2. “Hard reset“.................................................................................8

5.3. CV29 remarks.............................................................................8

5.4. Support for Roco Lokmaus.........................................................9

6. Configuration Variables description (CV’s)...............................10

7. Sound file structure (File list) ....................................................15

8. Calculation of the CV values.....................................................18

8.1. Transferring binary values into decimal....................................18

8.2. Windows calculator...................................................................19

Pictures

Picture 1 Connection diagram..................................................................... 4

Picture 2 Connection standard speaker (50 Ohm)...................................... 6

Picture 3 Connection of a low impedance speaker (8 Ohm) ...................... 6

Picture 4 Windows calculator binary......................................................... 19

Picture 5 Windows calculator decimal. ..................................................... 19

Tables

Table 1 Technical specifications ................................................................. 4

Table 2 CV Table ...................................................................................... 14

Table 3 File list.......................................................................................... 17

Table 4 Calculation Table ......................................................................... 18

Table 5 Calculation example..................................................................... 18

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1. Overview

The GE70 sound decoder is suitable for all digital model railroad systems
using the DCC standard.

It offers 3 simultaneous (3 channels) playable sound data’s that can be
freely linked to one of the function keys. Full function mapping conforming
to NMRA standards is supported. F1 is reserved for sound on/off, but can
also be remapped.

Depending on the application the same decoder can be loaded with
diesel, steam or E-loco sounds. With the SoundProg it is possible to load
sounds in built-in situation (decoder does not need to be removed from the
model). There is no limitation on the number of re-loads. The number of
exhausts per wheel revolution when loaded with steam sounds can be set
anytime with CV49.

CV49 Bit 0 = 1  reed switch for impulses is activated. CV51 is then
the number of impulses per steam burst. CV51 = 10  10 revolutions per
steam burst.

Using the file list a sound structure is built. In the file list a sound structure
is built by adding sound by groups. It is mandatory to use the order of the
sounds, the bold marked items represent a sound group (also called Slot).
It is however not necessary to fill all possible entries. Total size of all
sounds together is limited to 2 MBit (Extended explanation to be found in
the user manual if the SoundProg).

The decoder supports full NMRA addressing, 14/28 and 128 speed
steps for speed depending sounds. For steam locomotives the possibility
exists to synchronise the sounds with the wheel revolutions (Reed switch).

Frequency of the sounds is speed dependant and can be changed by
means of setting CV53 and CV54

The GE70 is fully NMRA compatible and can therefore be used in alle
digital systems who use the NMRA DCC Data format, like Digitrax, Lenz,
LGB, Uhlenbrock, Zimo, Roco ‘digital is cool’, etc.

Standard GE 70: 1W Nominal speaker power. Synchronisation con­nections for Reed or Hall switch. Type depending equipped with 4 (E-loco,
diesel) or 6 (steam loco) flexible wires.

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2. Technical specifications

An internal bridge rectifier supplies all outputs of the decoders. The to-

tal load is limited to 0.8A.

Track voltage .............................................................................. 12-24V

Nominal power.................................................................................. 1W

Operating temperature......................................................... -10 to 90°C

Dimensions ............(L x W x H) 0.85 x 0.55 x 0.2 inch / 21 x 14 x 5 mm

Wiring length ................................................................6 inch / 150 mm

Table 1 Technical specifications

2.1. Connection diagram

Picture 1 Connection diagram

The GE70 has no shrink tube off-factory. High flexible wire is used on
all outputs. The audio amplifier has 1W nominal power. The connected
speaker must have minimum impedance of 50 Ohm. Low impedance
speaker (i.e. 8Ohm speakers) may not be directly connected. If an 8Ohm
speaker is used: solder a resistance of about 40Ohm in one of the speaker
leads (see picture 3).

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3. Safety instructions

The decoder outputs are not protected against short circuits. As well
internal as external (i.e. short circuit on the speaker output. Wron connec­tions as switching the connections of the track and speaker outputs or
connection of any other incorrect power supply will damage the decoder
making it potentially defect.

.

Usually decoders are not damaged by over current but due to voltage
spikes caused by the motor or other inductive parts. Spikes generated by
the motor can be in access of several hundreds of Volts. As a counter­measure circuits have been built in the decoder to cope with these spikes.
Please note however that these circuits have their limitation with respect to
response time and voltage limits. Therefore do not set a to high voltage on
your central unit or booster then necessary (max. nominal voltage 12-24V).
For H0 and N scale one should set about 16V. A secondary reason to do
so is to protect the light bulbs in your models, which will last longer when
supplied with a lower voltage.

Due to small parts not suitable for children under 3 years of age.

No liability and responsibility is accepted on errors, changes of techni­cal specs and materials. No liability is taken on all damage or resulting
damage thereof due to improper handling and use, defective appliances,
any changes performed by user interference, overload or overheat result­ing from use outside of specifications. Use of the decoder with appliances
not meant for model railroads is strictly excluded from any liability and war­ranty.

Mount the decoder with double-sided tape. Under no circumstance
there should be contact between any part of the decoder and loco housing
or any other metal part. Isolate all metal parts in the surrounding area of
the decoder with plastic tape to avoid short circuit. Never wrap the decoder
in shrink tube or isolation tape. This will reduce air circulation and will
damage the decoder. When touching the decoder under operation hard­and/or software might be damaged.

Warranty will be void when used in an improper manner or use outside
of specifications.

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4. Connections

All connections must be potential free meaning all must be isolated
against wheel pickups and metal housing. All condensators and / or coils
must be removed from the electrical motor connections before you con­nect the decoder. No form of filters whatsoever should be connected to the
motor.

4.1. Connection diagram for steam loco

Decoder

braun

braun

violett

grün
schwarz

rot

Reedschalter

Schiene links

Schiene rechts

Picture 2 Connection of a standard speaker (50Ohm)

Decoder

braun

braun

violett

grün
schwarz

rot

Reedschalter

Schiene links

Schiene rechts

40E

Picture 3 Connection of a low impedance speaker (8Ohm)

In case of a diesel or E-Loco decoder, the brown wires are not
mounted. Also can steam loco decoders be used without synchronisation.