SD-34.2 4 Fold Switching Decoder
“
Product Information
Specifications:
- Product Model: SD-34 | SD-34.2
- Type: 4-fold Switching Decoder MM DCC
- Manufacturer: Tams Elektronik GmbH
- Version: 3.1
- Status: 05/2025
Product Usage Instructions:
1. Operation Overview
Provide an overview of how the SD-34 and SD-34.2 work.
2. Assembling the SD-34 Kit
Follow these steps to assemble the SD-34 kit:
3.1 Safety Instructions
Ensure to follow all safety instructions provided in the manual
before assembling the kit.
3.2 Soldering Properly
Proper soldering techniques are crucial for the assembly
process. Refer to the manual for detailed instructions.
3.3 Preparation
Prepare all components and tools needed for the assembly
process.
4. Connections
Learn how to correctly connect the SD-34 and SD-34.2:
4.1 Connection Assignment SD-34
Follow the connection assignments specified for the SD-34
model.
4.2 Connection Assignment SD-34.2
Similarly, follow the connection assignments specified for the
SD-34.2 model.
5. Settings
Adjust the settings of the decoder according to your
requirements:
5.1 Setting the Addresses
Configure the addresses for proper functioning.
FAQ (Frequently Asked Questions)
Q: Can I use the SD-34 with other decoder models?
A: The SD-34 is specifically designed for use with compatible
models. Using it with other decoders may result in
malfunctions.
Q: How do I reset the settings on the SD-34?
A: Refer to the manual for instructions on resetting the decoder
settings to default.
“`
SD-34 | SD-34.2
4-fold Switching Decoder MM DCC
Manual
kt r onikSD-34 le Item numbers e 43-01345
s
43-01346 43-01347
tam
SD-34.2
Item numbers 43-01356 43-01357
tams elektronik
n n n
SD-34 | SD-34.2
tams elektronik
Version: 3.1 | Status: 05/2025
elektronik
s © Tams Elektronik GmbH
All rights reserved, in particular the right of reproduction, distribution and translation. Copies,
reproductions and alterations in any form require the written permission of Tams Elektronik GmbH. We reserve the right to make technical changes.
t am Printing the manual
The formatting is optimised for double-sided printing. The standard page size is DIN A5. If
you prefer a larger display, printing on DIN A4 is recommended.
Notes on RailCom®
RailCom® is a German trademark registered in the name of Lenz Elektronik for class 9 “Electronic Controls” under number 301 16 303 and a trademark registered for classes 21, 23, 26, 36 and 38 “Electronic Controls for Model Railways” in U.S.A. under Reg.No. 2,746,080. To enhance the readability of the text, we have refrained from referring to the term each time it is used.
2 | Contents
tams elektronik
SD-34 | SD-34.2
Contents
1. Getting started……………………………………………………………………………………………….4 1.1. Contents of the package……………………………………………………………………………4 1.2. Accessories…………………………………………………………………………………………….4 1.3. Intended use………………………………………………………………………………………….5 1.4. Safety instructions……………………………………………………………………………………5
2. Operation overview………………………………………………………………………………………….6
3. Assembling the SD-34 kit………………………………………………………………………………….7
4. 5.
3.1. Safety instructions……………………………………………………………………………………7
3.2. Soldering properly……………………………………………………………………………………8
ik 3.3. Preparation…………………………………………………………………………………………….9
3.4. SD-34: PCB layout and parts list………………………………………………………………..11
n 3.5. Assembly……………………………………………………………………………………………..13
3.6. Performing a visual check………………………………………………………………………..14
r o Connections…………………………………………………………………………………………………15 t 4.1. Connection assignment SD-34…………………………………………………………………..16 k 4.2. Connection assignment SD-34.2………………………………………………………………..17
4.3. Connection to the power supply………………………………………………………………..18
le 4.4. Connection example……………………………………………………………………………….19 e Settings……………………………………………………………………………………………………….20
5.1. Setting the addresses……………………………………………………………………………..20
s 5.2. Basic settings………………………………………………………………………………………..22
6.
5.3. Configuration data………………………………………………………………………………….22
m Checklist for troubleshooting and error correction…………………………………………………23 a 6.1. Technical Hotline……………………………………………………………………………………24 t6.2. Repairs………………………………………………………………………………………………..24
7. Technical data………………………………………………………………………………………………25
8. Warranty, EU conformity & WEEE……………………………………………………………………..27 8.1. Guarantee bond…………………………………………………………………………………….27 8.2. EU Declaration of Conformity……………………………………………………………………28 8.3. Declarations on the WEEE Directive……………………………………………………………28
Contents | 3
SD-34 | SD-34.2
tams elektronik
1. Getting started
The instructions will help you step by step with the safe and proper assembly of the kit and installation and use of your switching decoder. Before you start to assemble the kit or put the decoder into operation, read this manual completely, especially the safety instructions and the section on possible errors and their elimination. You will then know what you have to pay attention to and thus avoid errors that sometimes can only be rectified with a lot of effort. Keep the instructions in a safe place so that you can restore functionality later in the event of any malfunctions. If you pass the switching decoder on to another person, also give the instructions with it.
1.1. Contents of the package
Switching decoder SD-34:
ik 1 kit SD-34 (item no. 43-01345-01), containing the components listed in the parts list ( section 3.4.) and one PCB or n 1 ready-built and tested circuit board SD-34 (item no. 43-01346-01) or 1 switching decoder SD-34 in housing (item no. 43-01347-01)
r o one jumper for programming the address t Switching decoder SD-34.2: k 1 ready-built and tested circuit board SD-34.2 (item no. 43-01356-01) or
1 switching decoder SD-34.2 in housing (item no. 43-01357-01)
ele 1.2. Accessories s To assemble the kit you will need
a soldering iron with temperature control and a thin tip and a deposit stand or a controlled
soldering station
a scraper, rag or sponge
m a heat-resistant pad a a small pair of side cutters and wire strippers t tweezers and flat-nose pliers if necessary
electronic solder (preferably 0.5 to 0.8 mm diameter)
Connection cables The use of stranded wire is recommended for making the connections. Stranded wires consist of several thin individual wires and are therefore more flexible than rigid wires with the same copper cross-section. Recommended cross-sections:
for all connections: > 0.25 mm²
4 | Getting started
tams elektronik
SD-34 | SD-34.2
1.3. Intended use
The switching decoder is intended for use in model construction, especially in model railway layouts, according to the specifications in the manual. Any other use is not in accordance with the intended use and will result in the loss of the warranty claim. Intended use also includes reading, understanding and following all parts of the instructions. The switching decoder is not intended to be used by children under the age of 14.
1.4. Safety instructions
! Note: The switching decoder contains integrated circuits (ICs). These are sensitive to electrostatic charging. Therefore, do not touch these components until you have “discharged” yourself. For this purpose, e.g. a grip on a radiator is sufficient.
ik Improper use and non-observance of the instructions can lead to incalculable hazards. Prevent
these dangers by carrying out the following measures:
n Only use the switching decoder in closed, clean and dry rooms. Avoid moisture and splash o water in the environment. After condensation has formed, wait two hours for r acclimatisation before use. t Disconnect the decoder from the power supply before carrying out wiring work. k Supply the decoder only with extra-low voltage as specified in the technical data. Only use
tested and approved transformers or power supplies units for this purpose.
le Only plug the mains plugs of transformers/power supplies units into properly installed and fused safety sockets.
e When making electrical connections, ensure that the cable cross-section is sufficient.
Heating of the decoder during operation is normal and harmless.
s Do not expose the decoder to high ambient temperatures or direct sunlight. Observe the information on the maximum operating temperature in the technical data.
m Regularly check the operational safety of the decoder, e.g. for damage to the connection cables.
a If you notice damage or if malfunctions occur, disconnect the connection to the power t supply immediately. Send the decoder in for inspection.
Getting started | 5
SD-34 | SD-34.2
tams elektronik
2. Operation overview
The switching decoders SD-34 and SD-34.2 are designed to control accessories, switched on and off or changed over via a change-over relay, e.g.
lightings, light signals, motor-run turnouts with limit switching.
With one switching decoder you can control a maximum of four accessories independent of each other.
Driving the decoder via accessory decoder commands
The outputs of the decoders SD-34 and SD-34.2 are operated via accessory decoder commands in DCC or Motorola format, sent from the central unit to one of the four turnout
ik addresses. The decoders automatically recognize the commands´data format. It is possible to
switch the outputs via mixed DCC and Motorola commands as well as to operate one output
n alternately in DCC and Motorola format.
Operation via vehicle decoder commands ( SD-34.2 only)
r o You can use a vehicle decoder address (locomotive address) to operate the switching decoder t SD-34.2 instead of turnout addresses. The 4 outputs of the decoder are switched via the
function keys F1 to F4 then. This allows to use the SD-34.2 in combination with DCC control
k units not designed for controlling turnout addresses. Note: The changeover to the use of
locomotive addresses is only possible with a DCC control unit.
le Programming e Using a DCC central unit the decoder address and the decoder´s features can be defined by
programming the configuration variables (CV). It is also possible to set the address by using a
s programming jumper (SD-34) or a push-button switch (SD-34.2).
When using a Motorola central unit the address has to be set with a programming jumper (SD-34) or a push-button switch (SD-34.2). Changing the other decoder´s features or
m assigning a locomotive address is neither necessary nor possible in layouts run in Motorola
format only.
t a Feedback via RailCom® (according to RCN-217)
The switching decoders SD-34 and SD-34.2 are RailCom compatible, i.e. the decoders are able to pass the RailCom messages via the rails to special RailCom detectors. This allows e.g. to feedback the correct performance of setting and switching commands.
Power supply
The switching decoders SD-34 and SD-34.2 and the connected accessories can be supplied
either with digital voltage from the booster circuit, i.e. via the integrated booster of the
digital central unit or a separate booster,
or via a separate transformer / power supply unit to relieve the digital circuit.
6 | Operation overview
tams elektronik
SD-34 | SD-34.2
3. Assembling the SD-34 kit
You can skip this section if you have purchased a ready-built decoder or device.
3.1. Safety instructions
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.
Fire risk Touching flammable material with a hot soldering iron can cause fire, which can result in
ik 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.
n Thermal danger o A hot soldering iron or liquid solder accidentally touching your skin can cause skin burns. As a r precaution: t use a heat-resistant mat during soldering, k always put the hot soldering iron in the soldering iron stand, le point the soldering iron tip carefully when soldering, and e remove liquid solder with a thick wet rag or wet sponge from the soldering tip. s 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
m 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
t a or the ready-built device.
! 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.
Assembling the SD-34 kit | 7
SD-34 | SD-34.2
tams elektronik
3.2. Soldering properly
Use a soldering iron with temperature control, which you set to approx. 300 °C. Only use electronic solder with a flux. Never use soldering water or soldering grease when soldering electronic circuits. These
contain an acid that destroys components and conductor paths.
Insert the connecting wires of the components as far as possible through the holes of the
board without using force. The body of the component should be close above the board.
Make sure that the polarity of the components is correct before soldering them. Solder quickly: soldering for too long can coffe pads or tracks to become detached or even
destroy components.
Hold the soldering tip on the soldering point in such a way that it touches the component
wire and the pad at the same time. Add (not too much) solder simultaneously. As soon as
ik the solder begins to flow, remove it from the soldering point. Then wait a moment for the
solder to flow well before removing the soldering iron from the soldering joint.
n Do not move the component you have just soldered for about 5 seconds. o A clean, non-oxidised (scale-free) soldering tip is essential for a perfect soldering joint and
good soldering. Therefore, before each soldering, wipe off excess solder and dirt with a
r damp sponge, a thick damp cloth or a silicone wiper. t After soldering, cut off the connecting wires directly above the soldering point with a side k cutter. le After assembly, always check each circuit again to ensure that all components are correctly
inserted and polarised. Also check that no connections or tracks have been accidentally
e bridged with tin. This can lead not only to malfunction, but also to the destruction of s expensive components. You can re-liquefy excess solder with the clean hot soldering tip.
The solder then flows from the board to the soldering tip.
tam
8 | Assembling the SD-34 kit
tams elektronik
SD-34 | SD-34.2
3.3. Preparation
Put the sorted components in front of you on your workbench.
The separate electronic components have the following special features you should take into account in assembling:
Resistors
Resistors reduce current.
The value of resistors for smaller power ratings is indicated through colour rings.
Every colour stands for another figure. Carbon film resistors have 4 colour rings.
The 4th ring (given in brackets here) indicates the tolerance of the resistor (gold
= 5 %, silver = 10 %).
Value:
33
ik 100
220
n 1 k o 2,2 k r 1,5 k t 4,7 k k 10 k
Colour rings: orange orange black (gold) brown – black – brown (gold) red – red – brown (gold) brown – black – red (gold) red – red – red (gold) brown – green – red (gold) yellow – violet – red (gold) brown – black – orange (gold)
le Ceramic capacitors e Among other things ceramic capacitors are used for filtering interference voltages
s or as frequency determining parts. Ceramic capacitors are not polarized.
Normally they are marked with a three-digit number which indicates the value coded. The number 104 corresponds to the value 100 nF.
m Electrolytic capacitors Electrolytic capacitors are often used to store energy. In contrast to ceramic t acapacitors they are polarized. The value is given on the casing.
Electrolytic capacitors are available with different voltage sustaining capabilities.
Using an electrolytic capacitor with a voltage sustaining capability higher than
required is always possible.
Diodes and Zener diodes Diodes allow the current to pass through in one direction only (forward direction), simultaneously the voltage is reduced by 0,3 to 0,8 V. Exceeding of the limit voltage always will destroy the diode, and allow current to flow in the reverse direction. Zener diodes are used for limiting voltages. In contrast to “normal” diodes they are not destroyed when the limit voltage is exceeded. The diode type is printed on the body.
Assembling the SD-34 kit | 9
SD-34 | SD-34.2
tams elektronik
Light emitting diodes (LEDs) When operated in the forward direction the LEDs light. They are available in several different versions (differing in colour, size, form, luminosity, maximum current, voltage limits). Light emitting diodes should always be connected via a series resistor which limits the current and prevents failure.
Transistors
Transistors are current amplifiers which convert low signals into stronger ones. There are several types in different package forms available. The type designation is printed on the component.
Transistors for a low power rating (e.g. BC types) have a package in form of a half zylinder (SOT-Gehäuse).
ik The three pins of bipolar transistors (e.g. BC types) are called basis, emitter and
collector (abbreviated with the letters B, E, C in the circuit diagram).
n Integrated circuits (ICs) Depending on the type, ICs fulfil various tasks. The most common housing form o is the so-called “DIL”-housing, from which 4, 6, 8, 14, 16, 18 or more “legs” r (pins) are arranged along the long sides. t ICs are sensitive to damage during soldering (heat, electrostatic charging). For that reason in the place of the ICs IC sockets are soldered in, in which the ICs k are inserted later.
le Microcontrollers e Microcontrollers are ICs, which are individually programmed for the particular application. The s programmed controller are only available from the manufacturer of the circuit belonging to it.
Opto couplers Opto couplers are ICs, which work similar to laser beam switches. They combine in one housing a light emitting diode and a photo transistor. Their task is the transmission of information without
m galvanic connection. They are in a DIL-housing with at least 4 pins. t a Relays
Relays are electronic switches, depending on their position the one or other (internal) connection is closed. The mode of operation of monostable relays can be compared to that of a push-button switch, i.e. the connection is only closed as long as the voltage is applicated. Bistable relays keep their status after switching comparable to a switch. Relays which combine two switches in one housing are common as well (shortly 2xUM). The switching between the two connections can be heard clearly because of the resulting clicking sound.
Modular terminal blocks Modular terminal blocks are solder-in screw-type terminals. They provide a solder-free and safe connection of the cables to the circuit, which can still be separated any time.
10 | Assembling the SD-34 kit
tams elektronik
3.4. SD-34: PCB layout and parts list
PCB layout
SD-34 | SD-34.2
s elektronik tam
Assembling the SD-34 kit | 11
SD-34 | SD-34.2
tams elektronik
Parts list
Carbon film resistors R4, R20
33
R18, R27, R28
100
R23, R25
220
R19, R22
1 k
R8, R9, R10, R11, R12, R13, R14, R15, R17
1,5 k
R1, R3, R7, R21
2,2 k
Ceramic capacitors Electrolytic capacitors Diodes
Zener diodes
R24
4,7 k
R2, R16
10 k
ik C1, C4, C39
100 nF
C10
100µF/25V
n C2, C3
220µF/25V
o D9, D10, D11
1N400x, x=2…7
t r D1, D2, D3, D4, D5, D6, D7, D8, D15, 1N4148
D16, D17, D18, D19, D21, D22, D23,
k D24
le D12, D20
ZPD5V1
e D14
ZPD47V
LEDs Transistors for a low
LED1 Q2
s
LED 3mm BC327
power rating Microcontrollers
Q3
mQ4, Q5, Q13
Q1, Q6, Q7, Q8, Q9, Q10, Q11, Q12
t aIC1
BC337 BC 516 BC557B PIC16F690P
Opto couplers
OK1, OK4
6N136
OK2, OK3
PC817 (2 pieces) or PC827 (1 piece)
IC-sockets
IC1
20-pole
OK1, OK4, OK2/OK3
8-pole
Relays
K1, K2, K3, K4
bistable 2 x Um 5 V
Double modular
X4
terminal blocks
2 x 9-pole
Pin header
JP1
2-pole
12 | Assembling the SD-34 kit
tams elektronik
SD-34 | SD-34.2
3.5. Assembly
Proceed according to the order given in the list below. First solder the components on the solder side of the PCB and then cut the excess wires with the side cutter. Follow the instructions on soldering in section 3.
! Caution: Several components have to be mounted according to their polarity. When soldering these components the wrong way round, they can be damaged when you connect the power. In the worst case the whole circuit can be damaged. At the best, a wrongly connected part will not function.
1. Resistors
Mounting orientation of no importance.
2.
3. 4. 5.
6.
(except R4) Diodes, Zener diodes
Ceramic Capacitors IC sockets
Light emitting diodes (LEDs)
Transistors
Observe the polarity!
ik The negative end of the diodes is marked with a ring. This is
shown in the PCB layout.
n Mounting orientation of no importance. r o Mount the sockets that way, the marking on the sockets show
in the same direction as the markings on the PCB board.
kt Observe the polarity!
With wired LEDs the longer lead is always the anode (positive
le pole). e Observe the polarity!
sThe cross section of transistors for a low power rating in SOT-
packages is shown in the PCB layout.
7. 8.
9.
Pin header
m Resistor R4 t a Relays
Solder the resistor that way, it´s body is standing upright on the PCB.
The mounting orientation is given by the layout of the pins.
10. Electrolytic capacitors
Observe the polarity! One of the two leads (the shorter one) is marked with a minus sign.
11. Double modular terminal blocks
Put together the terminal blocks before mounting them.
12. ICs in DIL-housing Insert the ICs into the soldered socket. Do not touch the ICs without first discharging yourself by touching a radiator or other grounded metal parts. Do not bend the “legs” when inserting them into the sockets. Check that the markings on the PCB, the socket and the IC show to the same direction.
Assembling the SD-34 kit | 13
SD-34 | SD-34.2
tams elektronik
3.6. Performing a visual check
Perform a visual check after the assembly of the decoder and remove faults if necessary:
Remove all loose parts, wire ends or drops of solder from the PCB. Remove all sharp wire
ends.
Check that solder contacts which are close to each other are not unintentionally connected
to each other. Risk of short circuit!
Check that all components are polarised correctly.
When you have remedied all faults, go on to the next part.
s elektronik tam
14 | Assembling the SD-34 kit
tams elektronik
SD-34 | SD-34.2
4. Connections
The decoder is equipped with terminals into which you plug and screw the connecting cables for the solenoid accessories and the power supply. Make the connections one after the other:
the accessories the central unit the power supply
Switching decoder SD-34
elektronik s t am Switching decoder SD-34.2
Connections | 15
SD-34 | SD-34.2
4.1. Connection assignment SD-34
tams elektronik
1 2 3 4 5 6 7
Switching decoder SD-34
ik Switching contact 2, to be switched with “straight on” n Switching contact 2, return conductor o Switching contact 2, to be switched with “branching” t r Switching contact 4, to be switched with “straight on” k Switching contact 4, return conductor le Switching contact 4, to be switched with “branching” e not in use
8
s Power supply / transformer (~)
9 10 11 12
Input DCC signal / central unit Switching contact 1, to be switched with “straight on”
m Switching contact 1, return conductor t a Switching contact 1, to be switched with “branching”
13
Switching contact 3, to be switched with “straight on”
14
Switching contact 3, return conductor
15
Switching contact 3, to be switched with “branching”
16
not in use
17
Power supply / transformer (~)
18
Input DCC signal / central unit
16 | Connections
tams elektronik
4.2. Connection assignment SD-34.2
SD-34 | SD-34.2
1 2 3 4 5 6 7
Switching decoder SD-34.2
ik Switching contact 2, to be switched with “branching” or F2 = “on” n Switching contact 2, return conductor o Switching contact 2, to be switched with “straight on” of F2 = “off” t r Switching contact 4, to be switched with “branching” or F4 = “on” k Switching contact 4, return conductor le Switching contact 4, to be switched with “straight on” of F4 = “off” e not in use
8
s Power supply / transformer (~)
9 10 11 12
Input DCC signal / central unit Switching contact 1, to be switched with “branching” or F1 = “on”
m Switching contact 1, return conductor t a Switching contact 1, to be switched with “straight on” of F1 = “off”
13
Switching contact 3, to be switched with “branching” or F3 = “on”
14
Switching contact 3, return conductor
15
Switching contact 3, to be switched with “straight on” of F3 = “off”
16
not in use
17
Power supply / transformer (~)
18
Input DCC signal / central unit
Connections | 17
SD-34 | SD-34.2
tams elektronik
4.3. Connection to the power supply
You can supply the decoder and the connected servos and other consumers
either with the digital voltage from the booster circuit, i.e. via the integrated booster of the
digital central unit or a separate booster,
or if you want to relieve the digital circuit, via a separate power supply.
7
not in use
8
Power supply / transformer (~)
9
Input DCC signal / central unit
16 not in use
17 Power supply / transformer (~)
18 Input DCC signal / central unit
Power supply via central unit
s t am Supply via a separate power supply
! Caution: If a component gets too hot, disconnect the decoder and the power supply from the mains immediately.
ik Possible short circuit!
Check the assembly!
ron! Caution: t Switch off the control k unit before connecting ele the decoder.
! Caution: When connecting several devices to the same voltage supply, generally all connections have to be polarised identically. Otherwise a short circuit will occur, possibly damaging connected devices.
18 | Connections
tams elektronik
4.4. Connection example
SD-34 | SD-34.2
Connection of a signal to terminals 4 to 6 (“switching
elekt r onik contacts 4”) s tam
Connections | 19
SD-34 | SD-34.2
tams elektronik
5. Settings
You can program the configuration variables (CV) using a DCC digital central unit. See the chapter in the manual of your central unit where the byte wise programming of configuration variables (CVs) is explained.
When using a Motorola central unit you can set the address with a programming jumper (SD-34) or with a programming push-button (SD-34.2). The remaining CV values cannot be changed with pure Motorola control units.
5.1. Setting the addresses
You can set the decoder address either by programming the CVs with your DCC central unit or
by using the programming jumper or push-button. When setting the address it is of no importance if you intend to operate the decoder by vehicle decoder commands (locomotive
ik commands) or accessory decoder commands (turnout commands).
Setting the address with the jumper or push-button
n With Motorola central units the address can be set via the programming jumper (SD-34) or
the programming push-button (SD-34.2) only. When using DCC central units it is often easier
o to set the address via the programming jumper / push-button than to program it via CV. r Note: Address setting with the programming key is only possible if control via turnout elekt addresses is set for the SD-34.2 in CV29.
s
SD-34
tam
SD-34.2
20 | Settings
tams elektronik
SD-34 | SD-34.2
In order to set the address via the programming jumper / push-button perform the following steps:
1. SD-34: Bridge the two pins of the programming connector JP1, by putting on the jumper included in the package. Take it away as soon as the LED flashes.
SD-34.2: Push the programming push-button on the PCB. The LED flashes.
2. Set one of the addresses from the quadruple accessory decoder address block you want to use for switching the connected accessories at the control unit (e.g. address “10” from the quadruple accessory decoder address block 9 12). Perform a switching command for the chosen address.
3. As soon as the LED goes out, the decoder has taken over the new address.
Setting the decoder address via CVs Instead of setting the address using the programming button, you can alternatively set it by
ik programming the CVs with a DCC control unit. The turnout addresses, via which the switching
commands are sent, result as follows:
n Decoder address x 4 = highest address of the quadruple accessory decoder address block
o Note: For the control of the decoder in Motorola format “255” is the highest decoder address r (= turnout address 1020). t Note: With some control units the numbering of the turnout addresses does not start with “1” but k with “0”. The addresses assigned to an address block are shifted accordingly.
le CV
No. Input value
Remarks and tips
e (Default)
Decoder address “Base value
9
s0, 1, 2, 3, … 7
(0)
The “base value” of the decoder address results from multiplying the input value by 64.
Decoder address
m “Additional value
1 1, 2, 3, … 63 (1)
t a Value in CV9
0
1
The decoder address results from the addition of the “additional value” to the “basic value” set in CV9.
2
3
4
5
6
7
Base value
#
Value in CV1
0
64
128
192
256
320
384
448
1…63 0…63 0…63 0…63 0…63 0…63 0…63 0…62
Adress
1
64
128
192
256
320
384
448
…
…
…
…
…
…
…
…
63
127
191
255
319
383
447
510
Settings | 21
SD-34 | SD-34.2
tams elektronik
5.2. Basic settings
Name of CVs
CV- Input value no. (Default)
Version
7 —
Manufacturer
8 (62)
Reset
8 0 … 255
Remarks and tips
Read only! Read only! Any input value restores the settings in state of delivery.
5.3. Configuration data
Name of CVs
CV- Input value no. (Default)
Configuration data 29 1 SD-34
128, 136 (136)
Configuration data 29 1 SD-34.2
0, 8, 128, 136 (136)
ik Remarks and tips n RailCom off
RailCom on
t ro RailCom off k RailCom on leOperation via
turnout addresses
e locomotive addresses
128 136
0 8
0 128
s Advice: When RailCom is not used it is recommended to switch it off in CV29.
Configuration data 33 0, 1
RailCom check on
0
m 2
(0)
RailCom check off
1
a In standard operation the decoder checks directly after having been switched on if the t booster for the connected section supplies a RailCom cutout. In case faulty detections are
mounting the RailCom check should be switched off. This has no effect on the feedback
with RailCom.
22 | Settings
tams elektronik
SD-34 | SD-34.2
6. Checklist for troubleshooting and error correction
! Warning: If you notice a strong heat development, immediately disconnect the connection to the supply voltage. Fire hazard!
Possible causes:
One or more connections are faulty. à Check the connections. “Kit” version: one or more components are soldered incorrectly. à Carry out a visual
inspection (à section 3.5.) and eliminate the faults, if necessary.
The decoder is defective. à Send the decoder in for inspection.
No reaction of the decoder
ik Possible causes:
The connection of the decoder to the central unit and / or the power supply is interrupted.
n à Check the connections.
The connection of the decoder to the accessory is interrupted. à Check the connections.
o The central unit is not operating. à Check if the central unit is ready for operation. r The connected accessory is defective. à Check the accessory or the points. t No reaction of the decoder after programming k Possible cause: When programming the address via CV you set the decoder address. To switch le the decoder accessory decoder address (turnout addresses) are used. à Input the turnout
address to switch. Advice: The decoder address multiplicated with 4 tallies to the highest
e address from the quadruple accessory decoder address block. s Example: decoder address = 10 à corresponding turnout addresses: 37 to 40
tam
Checklist for troubleshooting and error correction | 23
SD-34 | SD-34.2
tams elektronik
6.1. Technical Hotline
If you have any questions about the use of the decoder, our technical hotline will help you (telephone number and e-mail address on the last page).
6.2. Repairs
You can send us a defective decoder for inspection / repair (address on the last page). Please do not send us your return freight collect. In the event of a warranty or guarantee claim, we will reimburse you for the regular shipping costs.
Please enclose the following with your shipment
proof of purchase as evidence of any warranty or guarantee claim a brief description of the defect
ik the address to which we should return the product(s)
your email address and/or a telephone number where we can reach you in case of queries.
n Costs o The inspection of returned products is free of charge for you. In the event of a warranty or r guarantee claim, the repair and return are also free of charge for you. t If there is no warranty or guarantee case, we will charge you the costs of the repair and the
costs of the return. We charge a maximum of 50% of the new price for the repair according
k to our valid price list. le Carrying out the repair(s) e By sending in the product(s), you give us the order to inspect and repair it. We reserve the s right to refuse the repair if it is technically impossible or uneconomical. In the event of a
warranty or guarantee claim, you will then receive a replacement free of charge.
Cost estimates Repairs for which we charge less than 25.00 per item plus shipping costs will be carried out
m without further consultation with you. If the repair costs are higher, we will contact you and t a carry out the repair only after you have confirmed the repair order.
24 | Checklist for troubleshooting and error correction
tams elektronik
SD-34 | SD-34.2
7. Technical data
Digital protocols
Data formats
Motorola DCC (according to NMRA and RCN standard)
Adress range
Hint: The adress range to be used also depends from the control unit.
SD-34: MM: 1020 turnout addresses DCC: 2040 turnout addresses
SD-34.2:
MM: 1020 turnout addresses
Feedback format
Change-over switches Number of changeover switches
Electrical properties Power supply
DCC: 2040 turnout addresses or 510 vehicle decoder addresses (locomotive addresses)
ik RailCom (according to RCN standard) ron 4 lekt Digital voltage of the booster circuit (12 – 24 volts) eor 12 18 V a.c. voltage
sor 12 24 V d.c. voltage
Current consumption (without connected devices) approx.
m Maximum current t a per change-over switch
SD-34: 40 mA SD-34.2: 60 mA
1,000 mA
Protection
Protection class
Ready-made module (without housing): IP 00
Meaning: No protection against foreign bodies, contact and water.
Ready device (in housing): IP 20
Meaning: Protected against solid foreign bodies with diameter 12.5 mm and access with a finger. No protection against water.
Technical data | 25
SD-34 | SD-34.2 Environment
For use in closed rooms
tams elektronik
Ambient temperature during operation
0 ~ + 30 °C
Permissible relative humidity during operation
10 ~ 85% (non-condensing)
Ambient temperature during storage Permissible relative humidity during storage
Other features Dimensions (approx.)
Weight (approx.)
– 10 ~ + 40 °C
ik 10 ~ 85% (non-condensing) r on Circuit board: 72 x 82 mm t Ready device including housing: 100 x 90 x 35 mm k Assembled board (ready-made module): 67 g ele Ready device including housing: 115 g s
tam
26 | Technical data
tams elektronik
SD-34 | SD-34.2
8. Warranty, EU conformity & WEEE
8.1. Guarantee bond
For this product we issue voluntarily a guarantee of 2 years from the date of purchase by the first customer, but in maximum 3 years after the end of series production. The first customer is the consumer first purchasing the product from us, a dealer or another natural or juristic person reselling or mounting the product on the basis of self-employment. The guarantee exists supplementary to the legal warranty of merchantability due to the consumer by the seller. The warranty includes the free correction of faults which can be proved to be due to material failure or factory flaw. With kits we guarantee the completeness and quality of the components as well as the function of the parts according to the parameters in not mounted state. We guarantee the adherence to the technical specifications when the kit has been
ik assembled and the ready-built circuit connected according to the manual and when start and
mode of operation follow the instructions.
n We retain the right to repair, make improvements, to deliver spares or to return the purchase
price. Other claims are excluded. Claims for secondary damages or product liability consist
o only according to legal requirements. r Condition for this guarantee to be valid, is the adherence to the manual. In addition, the t guarantee claim is excluded in the following cases: k if arbitrary changes in the circuit are made, le if repair attempts have failed with a ready-made module or device,
if damaged by other persons,
e if damaged by faulty operation or by careless use or abuse. s
tam
Warranty, EU conformity & WEEE | 27
SD-34 | SD-34.2
tams elektronik
8.2. EU Declaration of Conformity
This product fulfils the requirements of the following EU directives and therefore bears the CE marking.
2001/95/EU Product Safety Directive 2015/863/EU on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS) 2014/30/EU on electromagnetic compatibility (EMC Directive). Underlying standards: DIN-EN 55014-1 and 55014-2: Electromagnetic compatibility – Requirements for household appliances, electric tools and similar electrical appliances. Part 1: Emitted interference, Part 2: Immunity to interference
To maintain electromagnetic compatibility during operation, observe the following measures:
ik Only connect the supply transformer to a professionally installed and fused earthed socket.
Do not make any changes to the original components and follow the instructions, connection
n and assembly diagrams in this manual exactly.
Only use original spare parts for repair work.
t r o 8.3. Declarations on the WEEE Directive
This product is subject to the requirements of the EU Directive 2012/19/EC on Waste Electrical
k and Electronic Equipment (WEEE), i.e. the manufacturer, distributor or seller of the product le must contribute to the proper disposal and treatment of waste equipment in accordance with
EU and national law. This obligation includes
e registration with the registering authorities (“registers”) in the country where WEEE is s distributed or sold
the regular reporting of the amount of EEE sold the organisation or financing of collection, treatment, recycling and recovery of the
products
m for distributors, the establishment of a take-back service where customers can return WEEE a free of charge t for producers, compliance with the Restriction of the Use of Certain Hazardous Substances
in Electrical and Electronic Equipment (RoHS) Directive.
The “crossed-out wheeled bin” symbol means that you are legally obliged to recycle the marked equipment at the end of its life. The appliances must not be disposed of with (unsorted) household waste or packaging waste. Dispose of the appliances at special collection and return points, e.g. at recycling centres or at dealers who offer a corresponding take-back service.
28 | Warranty, EU conformity & WEEE
tams elektronik
SD-34 | SD-34.2
s elektronik tam
29
SD-34 | SD-34.2
tams elektronik
s elektronik tam
30
tams elektronik
SD-34 | SD-34.2
s elektronik tam
31
t r onik Further Information and Tips: elek http://www.tams-online.de
s
Warranty and Service:
tams elektronik GmbH
am Fuhrberger Str. 4 t 30625 Hannover / GERMANY
Phone: +49 (0)511 / 55 60 60 Fax: +49 (0)511 / 55 61 61
Email: support@tams-online.de
Documents / Resources
 |
TAMS Elektronik SD-34.2 4 Fold Switching Decoder [pdf] User Manual SD-34, SD-34.2, SD-34.2 4 Fold Switching Decoder, SD-34.2, 4 Fold Switching Decoder, Switching Decoder, Decoder |