LDT DigitalBooster DB-4, DigitalBooster DB-4-B Assembly Instruction Manual

Littfinski DatenTechnik (LDT)

Multi-Digital

Light emitting diodes have to be assembled that the long wire of the diode
corresponds to the mark "+" of the pc-board. Before assembly please slip the distance
spacer onto the connection wires.

The resistor-network RN1 is marked at one end for the assembly position with
“...103...” and additionally with a printed circle or a square. Assemble this component
that way that the marking corresponds with the marking at the first bore of the pc­board. Additionally is the first bore marked with “1”.

Integrated circuits (IC`s) are either marked with a half round notch on one end or a
printed point for the correct mounting position. Push the IC`s into the correct socket
assuring that the notch or the printed point is corresponding to the half-rounded
marking on the pc-board. The 4-poles integrated circuit LTV814 (IC6) shall be
soldered directly onto the pc-board.
Please attend to the sensitivity of the ICs to electrostatic discharge, which will cause
immediate damage of the IC. Before touching those components please discharge
yourself by contacting an earthed metal (e.g. earthed radiator) or work with an
electrostatic safety pad.

Assembly of the DB4-Power PC-Board:

After completing the DB-4 basic pc-board you can assemble the SMD-pre-assembled
and tested DB4-Power PC-Board.

Firstly please tighten the two distance spacer to the basic pc-board with two of the four
cross section screws.

Apply now the DB4-Power PC-Board into the socket bar BU4 of the basic pc-board.
Pay attention that there is no offset of the DB4-Power PC-Board to the socket. The
DB4-Power PC-Board is in correct position at the socket bar BU4 of the basic pc
board if you can screw the DB-Power PC Board to the distance bolts.

The following picture 1 show the assembly procedure from the side view and the
picture 2 show the assembled DB4-Power-PC Board onto the basic PC-Board with
sight from the top.

Schraube
screw

DB-4-Basis

Distanzbolzen
distance spacer

DB4-Power

Schraube
screw

DB4-Power

Rev. 1.4

Littfinski DatenTechnik (LDT)

IC4 IC5

ST1

C3

R6

R5

D7

D5

C11

R1

D3

D2

IC1

R3

C4

C7

C8

C1 C2

C10

IC3

C9

D6

C6

R2

IC2

D1

D4
R4

C5

T1

T3

T4

T2

1 3 5 7 9 11 131517 19

2 4 6 8

10 12 14 16 18 20

JP5

2,5

4,5

ShortReport

RailCom

GoAuto

ONOFF

JP4

JP3

JP2

JP1

MMDCC

BU1

DB-4

Rev. 1.4

JK

Littfinski DatenTechnik (LDT)

+

STOPGO

LED2LED1

red brown

S1

+

KL3KL4KL2

STOP/GO

EDC

BU2

BU3

ST2ST1

IN OUT

Feedback

A

T

KL1

Picture 1 Picture 2

DigitalBooster DB-4

from the Digital-Professional-Series !

DB-4-B Part-No.: 080071

>> kit <<

The DigitalBooster DB-4 is a short-circuit-proofed power

amplifier (booster) for digital model railway layouts.

It provides a maximum digital current of 2,5 or 4,5 Ampere.

The DB-4 amplifies the digital formats of Märklin-Motorola,

mfx®, M4 and DCC.

The DB-4 can operate on several digital command stations
by using the 5-poles booster bus, the CDE-booster bus or
the Roco-booster bus.
The DigitalBooster DB-4 receives the power supply not from
a classical model railway transformer but from the switched
mode mains power supply DB-4 PowerSupply. On this unit is
the stabilized digital track voltage adjustable between 15 and
24 Volt, suitable for all track gauges.

This product is not a toy! Not suitable for children under 14 years. Improper use will imply danger or injuries due
to sharp edges and tips! Please store this instruction carefully.

CE Part-No.:
1370364

Made in Europe by

Littfinski DatenTechnik (LDT)

Kleiner Ring 9

D-25492 Heist/Germany

Phone: [phone] / 977 381

Fax: [phone] / 977 382

Internet: http://www.ldt-infocenter.com

Subject to technical changes and errors.  07/2015 by LDT

Märklin, Motorola and mfx are registered trademarks.

Assembly Instruction

Introduction:

You have purchased a kit for your model railway supplied within the assortment of

Littfinski DatenTechnik (LDT). These kits are of high quality and easy to assemble.
We are wishing you having a good time for assembling and application of this
product!

General:

Tools required for the assembly

Please assure that the following tools are available:

• a small side cutter

• a mini soldering iron with a small tip

• solder tin (if possible 0,5mm diameter)

Safety Instructions

• All electrical and electronic components included in this kit shall be used on low
voltage only by using a tested and approved voltage transducer (transformer). All
components are sensitive to heat. During soldering the heat shall be applied for a
very short period only.

• The soldering iron develops a heat up to 400°C. Please keep continual attention to
this tool. Keep sufficient distance to combustible material. Use a heat resistant pad
for this work.

• This kit contains small parts which can possibly be swallowed from children.
Children (especially under 3 years) shall not participate on the assembly without
supervision.

Assembly List:

Pos. Qty. Components Remarks Ref. Done

1 1 Printed circuit board DB-4 Rev. 1.4
2 2 Resistors 0,1 Ohm Marked: "R10" R1, R2
3 1 Resistor 10 Ohm brown-black-black-gold R3
4 1 Resistor 100 Ohm brown-black-black-black R4
5 1 Resistor 180 Ohm brown-gray-black-black R5
6 2 Resistors 220 Ohm red-red-black-black R6, R7
7 1 Resistor 330 Ohm orange-orange-black-black R8
8 1 Resistor 470 Ohm yellow-violet-black-black R9
9 1 Resistor 1 KOhm brown-black-black-brown R10

10 1 Resistor 2,2 KOhm red-red-black-brown R12
11 2 Resistors 3,3 KOhm orange -orange -black-brown R13, R14
12 2 Resistors 4,7 KOhm yellow-violet-black-brown R15, R16
13 4 Resistors 10 KOhm brown-black-black -red R11,R18...R20
14 1 Resistor 12 KOhm brown-red-black-red R21
15 1 Resistor 27 KOhm red-violet-black-red R22
16 3 Resistors 47 KOhm yellow-violet-black-red R17,R23,R24
17 1 Resistor 1 MOhm brown-black -black-yellow R25
18 1 Network 5*10 KOhm attend to polarity! RN1
19 10 Diodes 1N4003 attend to polarity! D1...4, D6...11

20 3 Diodes 1N5819 attend to polarity! D5, D12, D13
21 1 Z-Diode BZX ... 5V1 attend to polarity! D14
22 1 Z-Diode BZX ... 30V attend to polarity! D15
23 1 IC-socket 28poles attend to polarity marking! IC1
24 3 IC-sockets 8poles attend to polarity marking! IC2, 3, 5
25 1 IC-socket 16poles attend to polarity marking! IC7
26 1 IC: LTV814 attend to polarity! IC6
27 1 DC-DC Converter attend to polarity! IC4
28 1 Resonator 8MHz CR1
29 5 Capacitor 100nF 100nF = 104 C1...C5
30 1 Tantalum cap. 1uF/35V 1uF = 105; attend to polarity! C6
31 3 Tantalum cap. 10uF/10V 10uF = 106; attend to polarity! C7...C9
32 4 Electrolytic cap. 470uF/35V attend to polarity! C10...C13
33 1 Storage choke L1
34 1 DC-socket BU1
35 2 Sockets 4poles BU2, BU3
36 1 Socket bar 2x10poles BU4
37 1 Pin bar 2x5poles JP1 ... JP5
38 5 Jumpers set on pin bar 2x5poles JP1 ... JP5
39 2 Pin bars 5poles ST1, ST2
40 1 Push button S1
41 1 LED green plus distance sleeve attend to polarity! LED1
42 1 LED red plus distance sleeve attend to polarity! LED2
43 1 Clamp 2poles KL1
44 3 Clamps 2poles and 3poles build block prior to assembly KL2 ... KL4
45 1 IC: ATMEGA168-20 attend to polarity! IC1
46 1 IC: LM2574HVN-5 attend to polarity! IC2
47 1 IC: LM393 attend to polarity! IC3
48 1 IC: HCPL2631 attend to polarity! IC5
49 1 IC: LTV847 attend to polarity! IC7
50 4 Cross headed screws M3x6 for assembly "DB4-Power"
51 2 Distance spacer 18mm for assembly "DB4-Power"
52 1 DB4-Power assembly acc. instruction
53 final control

Set-Up:

For the board assembly please follow exact the sequence of the above assembly list.
Cross each line off as done after completing the insertion and the soldering of the
respective part.

For the diodes please keep special attention the correct polarity (marked line for the
cathode).

With reason to different makes of electrolytic capacitors you will find different
markings of the polarity. Some are marked with "+" and some are marked with "-".
Each capacitor has to be assembled to the board that the marking on the capacitor is
in correspondence with the marking on the pc-board.
For tantalum capacitors please attend to the connection wire marked "+". This wire
has to correspond to the printed mark on the pc-board.

Littfinski DatenTechnik (LDT)

Kleiner Ring 9 • D-25492 Heist/Germany • Phone: [phone] / 977 381 • Fax: [phone] / 977 382

Multi-Digital

Manual

DigitalBooster DB-4

The DigitalBooster DB-4 is a short-circuit protected

Power-Amplifier (Booster) for digital Model Railway

Layouts from the Digital-Professional-Series!

The DB-4 amplifies the digital formats of Märklin-

Motorola, mfx®, M4 and DCC.

DB-4-G Part-No.: 080073

>> finished module in a case <<

BU1

+

S1

DCCMM

JP1

JP2

JP3

JP4

OFFON

Auto Go

RailCom

ShortReport

red brown

LED1 LED2

GO STOP

+

Littfinski DatenTechnik (LDT)

KL1

K J

4,52,5

JP5

OUTIN

ST1 ST2

Rev. 1.4

DB-4

BU3

BU2

C D E

STOP/GO

KL2 KL4 KL3

Feedback

A

T

2,5 / 4,5 Ampere Booster für die Digitalformate Märklin­Motorola, mfx®, M4 und DCC.
2,5 / 4,5 ampere booster for Märklin-Motorola, mfx®, M4
and DCC.

DB-4

DigitalBooster

Multi-Digital

L

ittfinski DatenTechnik (

LDT

)

D-25492 Heist

www.ldt-infocenter.com

Digital-Profi werden!

The DigitalBooster DB-

4 provides a

maximum digital current of 2,5 or 4,5

Ampere and amplifies the digital

formats of Märklin-Motorola, mfx

®

, M4

and DCC.
The DB-

4 can operate with several

digital command stations by using the

5-

poles booster bus, the CDE booster

bus or the Roco-booster bus.
The DigitalBooster DB-4 receives the
power supply not from a classical
model railway transformer but from the
switched mode mains power supply
DB-4 PowerSupply. On this unit is the
stabilized digital track voltage
adjustable between 15 and 24 Volt,
suitable for all track gauges.

This product is not a toy! Not suitable for children under 14 years. Improper use will imply danger or injuries due to
sharp edges and tips! Please store this instruction carefully.

CE Part-No.:
1370365

DigitalBooster DB-4 – Manual

- 1 -

Content: Page

1. Preface / Safety Instruction 2

2. DB-4 connection to the digital command station or to other
boosters 3

2.1. DB-4 connection via the 5-poles Boosterbus 3

2.2. DB-4 connection via the CDE-Boosterbus 5

2.3. DB-4 connection via the Roco-Boosterbus 5

3. DB-4 connection to the Switched Mode Mains Power

Supply DB-4 PowerSupply 6

4. DB-4 connection to an Own Track Section 6

4.1. 3-conductor Track System 7

4.2. 2-conductor Track System 9

5. Booster in Operation 10

6. Adjusting Operation Modes with Jumper 10

6.1. Select Maximum Digital Current to 2,5 or 4,5 Ampere 10

6.2. Select data format for WatchDog- and

On-/Off-switch function 11

6.3. RailCom®*-cutout Creation or Suppression 11

6.4. Short Circuit Report to the Command Station (Short Report) 11

6.5. Automatic Switch-On (Auto Go) 12

7. Addresses for WatchDog- and On-/Off switch function 12

7.1. Common Address Section 13

7.2. Own Address Sections 13

7.3. Programming address sections 14

8. WatchDog: Communication with the Model Railway Software 15

9. DB-4 switching On and Off via Accessory Address 16

10. DB-4 switching On and Off via external push button 16

11. Feedback Report for Booster-Management 18

12. Assembly Plan of the Basic PC-board 19

DigitalBooster DB-4 – Manual

- 2 -

1. Preface / Safety Instruction:

You have purchased the DigitalBooster DB-4 within the assortment of Littfinski
DatenTechnik (LDT) for your model railway layout.

We are wishing you having a good time using this product!
The finished module in a case comes with 24 month warranty.

• Please read the following instructions carefully. Warranty will expire due to

damages caused by disregarding the operation instructions. LDT will not be
liable for any consequential damages caused by improper use or installation.

• You can download this manual from our Web-Site (www.ldt-infocenter.com) at the

section “Downloads“ as PDF-file with colored pictures. You can open the file with
the Acrobat Reader and you can make a print-out.

• Attention: Before starting the installation switch off the drive voltage by

disconnecting all model railway transformer from mains and/or switch off the
complete mains supply to the layout.

Vom DB-4-Power-Supply
From DB-4-Power-Supply

BU1

+

S1

DCCMM

JP1

JP2

JP3

JP4

OFFON

Auto Go

RailCom

ShortReport

red brown

LED1 LED2

GO STOP

+

Littfinski DatenTechnik (LDT)

KL1

K J

4,52,5

JP5

OUTIN

ST1 ST2

Rev. 1.4

DB-4

BU3

BU2

C D E

STOP/GO

KL2 KL4 KL3

Feedback

A

T

2,5 / 4,5 Ampere Booster für die Digitalformate Märklin­Motorola, mfx®, M4 und DCC.
2,5 / 4,5 ampere booster for Märklin-Motorola, mfx®, M4
and DCC.

DB-4

DigitalBooster

Multi-Digital

L

ittfinski DatenTechnik (

LDT

)

D-25492 Heist

www.ldt-infocenter.com

Digital-Profi werden!

Rückmelden
feedback

PC mit USB-Schnittstelle
PC with USB interface

Littfinski DatenTechnik (LDT)

DiCoStation

Rev. 1.0

RIGHT MIDDLE LEFT

s88 Rückmeldebus

s88 feedback bus

14..18V~

br. gelb

ST5 ST4 ST3

Software by

Falkner

everytime up-to-date

USB

ST1

LED1 LED2

STOPGO

++

ST6 EXT-PORT

BOOSTER

ST2

Multi-Digital

Digital-Profi werden!

für die USB-Schnittstelle mit den Digitalformaten
DCC und Märklin-Motorola plus drei s88
Rückmeldestränge.

DiCoStation

DirectCommandStation

L

ittfinski DatenTechnik (

LDT

)

D-25492 Heist

www.ldt-infocenter.com

Fahren und Schalten
driving and switching

weiss
white

weiss
white

weiss
white

gelb
yellow

braun
brown

Vom Modellbahntrafo
From transformer

Bestellbezeichnung /
Order code: Kabel Booster 1m

Erzwagenzug

S-Bahn

ET 85

DigitalBooster DB-4 communication with the DiCoStation

DigitalBooster DB-4 – Manual

- 3 -

2. DB-4 connection to the Digital-Command-Station or to other

Booster:

The galvanic separated boosterbus connections enables the application of the
DigitalBooster DB-4 in connection with several command stations by using the 5­poles Boosterbus, the CDE-Boosterbus or the Roco-Boosterbus.

The DB-4 is no Booster-Adapter. A change of the bus-system is impossible. The
booster-bus used for the connection of the first DB-4 to the digital command
station has to be used furthermore.

The below table indicates the possible connections to the available command
station.

5-poles

Boosterbus

CDE-

Boosterbus

Roco-

Boosterbus

Control Unit X
Central Station 1 X X
Central Station 2 X
Mobile Station 2 with Track Box X
ECoS 1 (50 000) X X
ECoS 2 (50 200) X X
Intellibox 1 X X
IB-Basic X
IB-COM X
Intellibox 2 X X
EasyControl X X
DiCoStation X
KeyCommander X
TWIN-CENTER X X
Roco 10761 (multiMAUS) X
Roco 10764 (multiMAUS) X
Fleischmann 680801 (multiMAUS) X
Roco / Fleischmann
multiZENTRALEpro

X

Roco / Fleischmann z21 and Z21 X
Lenz Digital plus LZ100 X
Lenz Digital plus LZV200 X
Viessmann Commander X X

2.1. DB-4 connection via the 5-poles Boosterbus:

The DigitalBooster DB-4 can be connected by use of the 5-poles boosterbus cable
(order code: Kabel Booster 1m, Part-No.: 000123), to one of the command stations
as per above table or to other boosters (e.g. DB-4, DB-2, 6015, 6017, Power 2, Power

3). The first booster shall be always connected to the command station by use of a 5-

poles boosterbus cable. The second booster shall be connected to the first one and so
on.

DigitalBooster DB-4 – Manual

- 4 -

Please connect a plug of the 5-poles boosterbus cable onto the command station or to
the previous booster. The connection of the plug is correct at the Control Unit,
Intellibox, TWIN-CENTER, Märklin Booster 6017, Power 2 and Power 3 if the
direction of the cable shows to the bottom. For the Märklin Booster 6015 is the
correct position of the Boosterbus-Cable showing to the top.

The second plug of the boosterbus cable has to be connected at the DigitalBooster
DB-4 to the pin bar ST1 with the marking “IN“.
Please attend that the white single wire of the 5-poles cable corresponds to the
white marking at the pin bar ST1.
The plug position of the 5-poles boosterbus cable is correct on the DigitalBooster
DB-4 if the twisted cable has a direction away from the booster.

If a following booster shall be connected with a 5-poles boosterbus cable to the
DigitalBooster DB-4 this has to be done via the pin bar ST2 (“OUT”).

BU1

+

S1

DCC
MM

JP1

JP2

JP3

JP4

OFFON

Auto Go

RailCom

ShortReport

red brown

LED1 LED2

GO STOP

+

Littfinski DatenTechnik (LDT)

KL1

K J

4,52,5

JP5

OUTIN

ST1 ST2

Rev. 1.4

DB-4

BU3

BU2

C D E

STOP/GO

KL2 KL4 KL3

Feedback

A

T

2,5 / 4,5 Ampere Booster für die Digitalformate Märklin­Motorola, mfx®, M4 und DCC.
2,5 / 4,5 ampere booster for Märklin-Motorola, mfx®, M4
and DCC.

DB-4

DigitalBooster

Multi-Digital

L

ittfinski DatenTechnik (

LDT

)

D-25492 Heist

www.ldt-infocenter.com

Digital-Profi werden!

braun

brown

J

rot
red

K

Vom DB-4-PowerSupply 2
From DB-4-PowerSupply 2

Gleisbereich 2

Track section 2

weiss
white

BU1

+

S1

DCCMM

JP1

JP2

JP3

JP4

OFFON

Auto Go

RailCom

ShortReport

red brown

LED1 LED2

GO STOP

+

Littfinski DatenTechnik (LDT)

KL1

K J

4,52,5

JP5

OUTIN

ST1 ST2

Rev. 1.4

DB-4

BU3

BU2

C D E

STOP/GO

KL2 KL4 KL3

Feedback

A

T

2,5 / 4,5 Ampere Booster für die Digitalformate Märklin­Motorola, mfx®, M4 und DCC.
2,5 / 4,5 ampere booster for Märklin-Motorola, mfx®, M4
and DCC.

DB-4

DigitalBooster

Multi-Digital

L

ittfinski DatenTechnik (

LDT

)

D-25492 Heist

www.ldt-infocenter.com

Digital-Profi werden!

braun

brown

J

rot
red

K

Vom DB-4-PowerSupply 1
From DB-4-PowerSupply 1

Gleisbereich 1

Track section 1

weiss
white

Bestellbezeichnung /
Order code: Kabel Booster 1m

Von Digitalzentrale
From command station

Zu weiteren Boostern

To further boosters

DigitalBooster DB-4 connection to the command station and between each other via the 5-poles

boosterbus.