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Assembly Instruction

 

L

ittfinski 

D

aten

T

echnik (

LDT

)

 

 

 

                                                                             

  

 

8-fold feedback module 

with integrated 

occupancy detector 

from the 

Digital-Professional-Series 

!

 

 

SX-GB-8-B 

Part-No.:

 320041 

 

 

>> kit << 

 

  

feedback report via Sx-bus

 

     

(

Selectrix®

 or 

compatible digital central units

)

 

  

short circuit protected

 

     

(one automatic fuse on each output)

 

  

up to 1 Ampere load on each output

 

  

feedback address programmable:

 

from 

0

 to 

103

 

  

release-delay programmable:

 

      

from 

to

 2,48 seconds

 

 

This product is not a toy! Not suitable for children under 14 years of age! The kit 
contains small parts, which should be kept away from children under 3! Improper 
use will imply danger of injuring due to sharp edges and tips! Please store this 
instruction carefully. 

 
 

 

 
 

 
 

Introduction: 

 

You have purchased the 8 fold feedback module 

SX-GB-8

 with 

integrated detection of track occupancy for your model railway. 
The 

SX-GB-8

 is a high quality product that is supplied within 

the assortment of 

L

ittfinski 

D

aten

T

echnik (

LDT

). 

 

We are wishing you having a good time using this product. 

 

Feedback modules 

SX-GB-8 

of the

 

Digital-Professional-

Series 

can be operated with your digital model railway without 

any problems

 

The 

SX-GB-8

 is suitable for all 

Selectrix® 

or 

compatible 

digital central units

 which support the 

Sx-bus

 by using the  

5-poles diode-plug

 

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 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 consist of small parts, which can be possibly 
swallowed from children. Children (especially under 3 years) 
shall not participate on the assembly without supervision.

 

Set-Up: 

 

For the board assembly please follow exact the sequence of 
the below 

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 to the correct 

polarity (marked line for the cathode). 

 

The connector of 

tantalum capacitors

 marked with "

+

" has to 

correspond with the respective marking on the pc-board. 

 

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. 

 

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 (for example: an earthed  
radiator) or work with an electrostatic safety pad. 

 

On 

transistors

 and 

voltage-regulators

 it has to be attended 

to the flattened side. 

 

The position of the soldered 

wire-bridge

 is marked on the 

board with a thick white line between the respective bores. 

 

Before assembling the clamps please connect the 

two

 

2-pole

 

and the 

two  3-pole clamps

 together to a block with 

10 

connections

 

The 

light emitting diodes 

have to be assembled on the pc-

board with the longer leg to be connected to  "

+

". Before 

soldering the diodes push the 

distance spacers

 onto the legs. 

 
 

 

Assembly List: 

 

Pos.

Qty. Component

Remarks

Ref.

Done

1

1

Printed Circuit Board

 

 

2

1

Resistor 560 Ohm

green-blue-black-black

R3

3

8

Resistors 1KOhm

brown-black-black-brown

R4..R11

4

4

Resistors 4,7KOhm

yellow-violet-black-brown

R12..R15

5

2

Resistors 22KOhm

red-red-black-red

R16, R17

6

4

Resistors10KOhm

brown-black-black-red

R18..R21

7

9

Resistors 100KOhm

brown-black-black-orange

R22..R30

8

2

Resistors 100Ohm

brown-black-black-black

R31,R32

9

1

Resistor 1MOhm

brown-black-black-yellow

R33

10

3

Wire-bridges

spare wire

Br1..Br3

11

1

Diode BAW 75

attend to the polarity!

D17

12

1

IC-Socket 20-poles

 

IC1

13

3

IC-Sockets 14-poles

 

IC4..IC6

14

1

IC-Socket 8-poles

 

IC2

15

7

Capacitors 100nF

100nF = 104

C1..C7

16

1

Tantalum cap. 0,1uF/35V attend to the polarity!

C8

17

1

Resonator 12MHz

CR1

18

1

Push button

S1

19

16 Diodes BY251

attend to the polarity!

D1..D16

20

1

Transistor BC 557

attend to the polarity!

T1

21

1

Voltage regulator 78L05

attend to the polarity!

IC3

22

1

LED + dist. Spacer

attend to the polarity!

LED1

23

8

Multi-Fuses R090

 

MF1..8

24

2

Clamps 2-poles

build blocks before assembly

 

25

2

Clamps 3-poles

build blocks before assembly

26

2

Sockets 5poles

ST1, ST2

27

1

IC: AT89C2051

attend to the polarity!

IC1

28

3

IC: LM339

attend to the polarity!

IC4..IC6

29

1

IC: 24C02

attend to the polarity!

IC2

30

Final Control

 

Made in Europe by

 

L

ittfinski 

D

aten

T

echnik (

LDT

)

 

Kleiner Ring 9 

D-25492 Heist/Germany 

Phone: 0049 4122 / 977 381; Fax: 0049 4122 / 977 382 

Internet: http://www.

ldt-infocenter

.com 

 

Subject to technical changes and errors. 

 05/2013 by LDT 

 

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