LDT SA-DEC-4, S-DEC-4 User Manual

Littfinski DatenTechnik (LDT)

1

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

Sample Connections: Viessmann Semaphore Signals

with one and two drive units

1. Digital Operation of Viessmann Semaphore Signals with

one Drive Unit (e.g. 4400, 4401, 4405, 4500, 4501, 4505, 4900

and 4901)

Viessmann Semaphore Signals with one drive unit can be operated either via the LDT-Turnout
Decoder S-DEC-4 or the Switch Decoder SA-DEC-4. One signal can be digital controlled by
each output. The following sample connections will show the function.

Von Steuereinheit oder Booster
From command station or booster

braun
brown

rot
red

È È

K J

red brown

KL1

Digital-Profi werden!

S1

Magnetartikel-Decoder
S-DEC-4-MM

Für 4 Doppelspulenantriebe für Märklin-Motorola
Digitalsysteme. Schaltstrom: 1 Ampere pro
Ausgang.

Multi-Digital

KL2

+ ~ ~ ­12 ... 18V~
15 ... 24V=

R

gelb
yellow

Vom Modellbahntrafo
From transformer

S-DEC-4

Rev. 2.3

4-fach Magnetartikeldecoder
4-fold turnout decoder

braun
brown

RG4R G

Littfinski DatenTechnik (LDT)

L

ittfinski DatenTechnik (

www.ldt-infocenter.com

1 2

LDT

D-25492 Heist

GR R G

3

)

Semaphore Signal with one drive unit connected to the Turnout Decoder S-DEC-4-MM or S-DEC-4-DC

Littfinski DatenTechnik (LDT) Address Phone

Internet / e-mail Kleiner Ring 9 +49 (0) 4122 / 977 381
http://www.ldt-infocenter.com D-25492 Heist/Germany Fax
[e-mail] +49 (0) 4122 / 977 382

Littfinski DatenTechnik (LDT)

2

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

Von Steuereinheit oder Booster
From command station or booster

braun
brown

rot
red

È È

K J

red brown

Digital-Profi werden!

Schaltdecoder
SA-DEC-4-MM

Mit 4 bistabilen Relais für Märklin-Motorola
Digitalsysteme. Schaltstrom: 4 Ampere pro
Ausgang.

12 ...18V~
15 ... 24V=

4-fach Schaltdecoder
4-fold Switch Decoder

SA-DEC-4

Rev. 2.4

braun
brown

KL1

R

gelb
yellow

Vom Modellbahntrafo
From transformer

S1

Multi-Digital

Littfinski DatenTechnik (LDT)

L

ittfinski Daten

www.ldt-infocenter.com

1 2

Technik (LDT

D-25492 Heist

COM COM

3 4

COM COM

)

Semaphore Signal with one drive unit connected to the Switch Decoder SA-DEC-4-MM or SA-DEC-4-DC

Littfinski DatenTechnik (LDT) Address Phone

Internet / e-mail Kleiner Ring 9 +49 (0) 4122 / 977 381
http://www.ldt-infocenter.com D-25492 Heist/Germany Fax
[e-mail] +49 (0) 4122 / 977 382

Littfinski DatenTechnik (LDT)

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

2. Digital Operation of Viessmann Semaphore Signals with
two drive units (e.g. 4402, 4502 and 4902)

As semaphore signals with two wings require eventually only one control command for a new
signal aspect with both wings there is a control module implemented within the connection of the
signal with two drive units to assure the required intersection.

For the selection of the control system Viessmann has themselves orientated to positive control
impulses as used by the Märklin system.

LDT Decoder produces negative control impulses. For controlling turnouts or signals with
solenoid drives or uncoupling devices the polarity of the control impulses are not important.

2.1. For the application of decoder with negative switch impulses Viessmann offers a suitable
control module by a respective request.

Von Steuereinheit oder Booster

È È

From command station or booster

braun
brown

rot
red

K J

red brown

KL1

Digital-Profi werden!

S1

Littfinski DatenTechnik (LDT)

Magnetartikel-Decoder
S-DEC-4-MM

Für 4 Doppelspulenantriebe für Märklin-Motorola
Digitalsysteme. Schaltstrom: 1 Ampere pro
Ausgang.

Multi-Digital

L

ittfinski DatenTechnik (

www.ldt-infocenter.com

RG4R G

LDT

D-25492 Heist

3

)

S-DEC-4

Rev. 2.3

4-fach Magnetartikeldecoder
4-fold turnout decoder

braun
brown

GR R G

1 2

Control
module

Steuer­modul

negative Schaltimpulse
negative switch impulses

KL2

+ ~ ~ ­12 ... 18V~
15 ... 24V=

gelb
yellow

Vom Modellbahntrafo
From transformer

Semaphore Signal with two drive units on the Turnout Decoder S-DEC-4-MM or S-DEC-4-DC with control

module for negative switch impulses (supplied by Viessmann by respective request or realized by turning the

diodes at the control module as explained under 2.2).

Littfinski DatenTechnik (LDT) Address Phone

Internet / e-mail Kleiner Ring 9 +49 (0) 4122 / 977 381
http://www.ldt-infocenter.com D-25492 Heist/Germany Fax
[e-mail] +49 (0) 4122 / 977 382

Littfinski DatenTechnik (LDT)

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

2.2. Even with low experience in soldering electronic components you can easily rebuild a
module for negative switch impulses out of a control module with positive switch impulses. You
have just to unsolder all 4 diodes of the control module, turn them by 180 degree and re-solder
them at the old position.

The connection plan at the previous page shows how to connect the LDT-Decoder

S-DEC-4-MM or the S-DEC-4-DC to a two wings semaphore signal.

2.3. The next sample connection shows the possible application of a semaphore signal with two

drive units and a control module for positive switch impulses (as supplied ex-factory by
Viessmann together with the signal) with LDT-Decoder. It is possible to use our switch decoder
SA-DEC-4-MM or SA-DEC-4-DC for this application.
The wiring corresponds to the sample connection within the Viessmann operation instruction for
the signal. The switch decoder includes 4 potential-free switch contacts for digital control.

Von Steuereinheit oder Booster
From command station or booster

braun
brown

rot
red

È È

Control
module

Steuer­modul

positive Schaltimpulse
positive switch impulses

K J

red brown

Digital-Profi werden!

Schaltdecoder
SA-DEC-4-MM

Mit 4 bistabilen Relais für Märklin-Motorola
Digitalsysteme. Schaltstrom: 4 Ampere pro
Ausgang.

Multi-Digital

12 ...18V~

15 ... 24V=

4-fach Schaltdecoder
4-fold Switch Decoder

SA-DEC-4

Rev. 2.4

braun
brown

KL1

gelb
yellow

Vom Modellbahntrafo
From transformer

S1

Littfinski DatenTechnik (LDT)

L

ittfinski Daten

Technik (LDT

www.ldt-infocenter.com

1 2

D-25492 Heist

COM COM

3 4

COM COM

)

Semaphore Signal on the SA-DEC-4-MM or SA-DEC-4-DC with control module for positive switch impulses.

Littfinski DatenTechnik (LDT) Address Phone

Internet / e-mail Kleiner Ring 9 +49 (0) 4122 / 977 381
http://www.ldt-infocenter.com D-25492 Heist/Germany Fax
[e-mail] +49 (0) 4122 / 977 382

Littfinski DatenTechnik (LDT)

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

To be able to a digital switching of a three-aspect signal are two decoder addresses respectively
outputs required. Via the address 1 will be the signal switched to “Stop” and “Proceed”. With the
address 2 will be the semaphore signal switched to “Slow approach”.

The signal will be switched as follows:
"Stop" Output 1 ON

"Proceed" Output 1 OFF; Output 2 ON
"Slow approach" Output 1 OFF; Output 2 OFF

If you want an automatic switching of the signal (with MEMORY or with a computer software),
is this possibility recommended.
But if you intend to switch the signal via a KEYBOARD or a remote control it is recommended
to use the first solution by using the Turnout Decoder S-DEC-4 because then it will be required
to activate just one key to switch the signal.

Subject to technical changes and errors.

 03/2015 by LDT

Littfinski DatenTechnik (LDT) Address Phone

Internet / e-mail Kleiner Ring 9 +49 (0) 4122 / 977 381
http://www.ldt-infocenter.com D-25492 Heist/Germany Fax
[e-mail] +49 (0) 4122 / 977 382