User Manual WDecD-TN DCC Accessory Decoder - Bahn-in
Contents
1. The voltage on the 4 blue colored terminals is proportional to the supply voltage on K1 and might be as high as 20 V or more DCC track voltage 14 18VAC Wiring for mode 3 e rN a O lt 14 18VAC fromMRR f LIN lAo o IMITI TIAE transformer or DCC Relay track voltage Light eemapno e Li a aS es GRUN pays AN Wh nyi Illumination JaN green red ae End of stroke Is Figure 2 Wiring of the decoder in mode 2 To run polarized point motors in mode 3 you need to wire a normal relay with a form c output contact as shown in figure 2 The relay coil must be suited for ca 20 24VDC The relay should be wired in such a way that in its de energized condition the point assumes a known safe position straight or thrown As mentioned before using either the specially designed SDecD TN or the UniDecD IN you can run polarized turnout motors without the use of a relay WDecD TN V2 1 05 06 2006 3 of 13 2 4 Modes 4 and 5 The modes 4 and 5 provide a mixture of pulsed and continuous outputs Both pairs on the terminal blocks K6 and K7 will be run as pulsed output pair with a pulse duration of 0 25 s like in mode1 The output pairs on the terminal blocks K4 and K5 will be run as continuous outputs like in mode 3 In mo2. S1 Capacitor MKT 1 100nF 5 C3 Capacitor radial 1 41uF 16V 5 C2 Capacitor radial 1 470uF 35V 5 C3 Bridge rectifier 1 80V 1500mA B1 Self healing fuse 1 RXEF050 F1 Triple terminal block 4 ARK120 3 K4 K5 K6 K7 Dual terminal block 2 ARK120 2 K1 K3 LED 1 3mm low current type 2 04 LED Jumper 1 RM2 54 2 04 JP1 OEC OLER WDECA TN DECODER WDECA TN darisus de C 2005 G Clemens 4 Figure 7 Component layout WDecD TN WDecD TN V2 1 05 06 2006 11 of 13 H oH FH Lo 7 2 The schematic of the WDecD TN ADAD AD IS hoy a RA E e f lon l AD me r LE LNG J Q oO ie ra z E om J a a dk gid bs ai fa Z m i Pol L AG Ute i GY gt odd oxy al lddfaxl zadon a ca AD 7 ETOJN Z a J a SIdiLL D op e082 NIN E sagt AD g E a O 02 Co E 5 ooo 8 t gem E T at T a Eo e I se S z H rad ZIY LX sie z a a ean F T Ie nr a 98d OSIM bea oe ee 7 a 6 4adtios LASS PT no MNI L2 AG Ag Ld i AG OS 3541004 os HOS baa fi C 12 of 13 Figure 8 Schematic WDecD TN 05 06 2006 AADEL WDecD TN V2 1 Table of contents j 2 3 4 5 6 7 Properties Ol TNE decoder sisirig a a E eet Das 1 Wiring and operating the decoder ccccsecccseeceeeeceeeceeeceuceceueeseeceuseseeessaeessusseeeesseeess 2 2 1 Wiring and operation in mode 1 and mode 2 ssssssssesssrnssrrsrrrrrrrrrrrrrrrrrsnnrsrrrerenn 2 2 2 Wiring and operatio
3. the 8 modes of operation Control of 4 dual coil accessories with an output pulse duration of 0 25 s Control of 4 dual coil accessories with an output pulse duration of 0 5 s Control of 4 pairs of continuous outputs Can be used to control illumination 2 aspect signals or motor driven points relay required Keys 5 8 control 2 dual coil accessories with an output pulse duration of 0 25 s Keys 1 4 control 2 pair of continuous outputs as in mode 3 Keys 5 8 control 2 dual coil accessories with an output pulse duration of 0 25 s Keys 1 2 control 1 pair of continuous outputs as in mode 3 Keys 3 on and 4 off control a flashing function on outputs 3 and 4 A possible application might be signals or rail road crossing warning lights Individual control of 8 continuous outputs Control of 2 signals with each 3 aspects Control of one dual coil accessory with an output pulse duration of 0 25 s Control of 2 signals with each 4 aspects Table 1 Modes of operation of the WDecD TN WDecD TN V2 1 05 06 2006 7 of 13 4 Activating storage When using model signals the WDecD TN can automatically store the aspects actually shown and automatically restore these aspects when you power up your layout again To activate this feature you just have to remove jumper JP1 Now the decoder will store the actual aspects the state of the 8 outputs 3 s after it processed a DCC command for its decoder address The information will be stored in E
4. the outputs To avoid continuous excitation of coils intended for momentary operation you may prefer to use light bulbs to test the function Now push the push button on the decoder The LED should now be lit and shows that the decoder is in the self learning state in which it listens to the DCC commands on K3 The first accessory command that comes by will now be decoded and supplies the necessary information about the decoder s address and mode of operation Once the decoder has detected a valid accessory command it will switch off the LED and store the decoder address and mode of operation in non volatile memory It is now ready to execute all accessory commands for the learned address You must of course teach this decoder address and mode of operation by pushing the right turnout button on your digital command station or keyboard while the decoder is in learning mode The decoder s address and mode of operation can be changed as often as required 3 1 Setting the decoder address Every decoder handles 4 pairs of outputs 8 outputs To address these outputs you can either number the output pairs points or the decoders The WDecD TN uses decoder numbers or decoder addresses The first decoder with decoder address 1 contains the output pairs 1 4 The decoder with address 2 contains the output pairs 5 8 and so on Now it is obvious that the 8 outputs of a single decoder all share the same decoder address To program th
5. EPROM on board of the microcontroller The number of write cycles for the ATMEL EEPROM is limited to at least 100 000 So if you want to preserve this non volatile memory you may wish to leave the jumper in If you use the decoder for points only pulling the jumper makes no sense because the point stores its last position mechanically 4 1 Memorizing the initial state When you power up a new decoder the outputs will all be off This may not be desired when you use it for model signals You would expect signals to show at least one aspect maybe even a Safe aspect like stop Now you can use the storage feature to define an initial output state e Remove the jumper JP1 e Operate the signal s to obtain the aspect s you want to be the initial state e Wait at least 3 s to give the decoder the opportunity to store the output state in non volatile memory e Put the jumper JP1 back in place From now on at powering up your layout the signal s will show the aspect s that you just defined To restore the original state of the decoder follow these steps Remove the jumper JP1 Reprogram the WDecD TN to mode 1 or 2 Operate at least one accessory on the decoder Wait for the outputs to switch off again Wait at least 3 s for the decoder to store the outputs off state Re insert the jumper JP1 Reprogram the WDecD TN to the original mode Now all outputs will be off when you power up your layout Do not use memorized outpu
6. HP2 Sh1 Abb 5 Figure 5 The aspects Hp0 Ho1 Hp2 and Sh1 controlled by the outputs 1R 1G 2R and 2G WDecD TN V2 1 05 06 2006 5 of 13 2 Hints for the operation of model signals The continuous outputs in the modes 3 4 5 7 and 8 can be used to operate model signals with light bulbs and or LEDs Each one of the continuous outputs in a group represents a signal aspect An aspect can consist of one or more lights The German signal aspect Hp2 in figure 5 consists of a green and an amber lamp The total current drawn by all lamps in an aspect must not exceed 500 mA Since certain lamps in a signal are used for more than just one aspect you must use diodes to isolate one aspect from the other The example in figure 5 shows that the left red light is used in the aspect HPO as well as in the aspect Sh1 The green light is used in Hp1 and Hp2 In figure 3 and 4 you can see examples of how to use diodes to isolate the aspects of an annunciating and a main signal of the German DB railroad A 2 or 3 aspect signal with a flashing signal lamp can be controlled in mode 5 No other mode provides a flashing output To gain full control of more complex signals or combination of signals with up to 8 or more lamps LEDs you should refer to the WDecN TN decoder 3 Programming the decoder To program the decoder it must be supplied with power on K1 and the digital DCC signal on K3 To verify the function you may connect one or more accessories to
7. Hp 1 Vr 0 oder Hp 0 4x 1N4148 Beispiel DB Vorsignal mit LED Ca 1K5 Ca 1K5 Ca 1K5 Ca 1K5 Figure 3 Wiring the decoders in mode 7 If a signal has 3 aspects but uses more than one lamp to show an aspect these aspects must be separated by diodes to avoid all lamps to be on in all aspects The example in figure WDecD TN V2 1 05 06 2006 4 of 13 3 shows how the Deutsche Bahn signal can show 3 aspect with 2 yellow and 2 green LEDs The 3 aspects VrO Vr1 and Vr2 are separated with simple and cheap 1N4148 diodes In addition to the 2 three aspect signals you can run a dual coil turnout motor or two single coil de couplers on the outputs at K7 These outputs are pulsed for the duration of 0 25 s 2 6 Wiring and operation in Mode 8 DCC Track Voltage Wiring in Mode 8 14 18VAC from MRR transformer or DCC track power Semaphore with LEDs 3 x 1N4148 Ca 1K5 Ca 1K5 fain ioe Te Figure 4 Wiring of the decoders in mode 8 In mode 8 you can operate 2 signals with 4 aspects each Aspects using more than one lamp or LED must be isolated with diodes The example in figure 4 shows how a main signal of the Deutsche Bahn DB with 6 lamps or LEDs and 4 aspects should be wired HPO HP1
8. User Manual DCC Accessory Decoder WDECD TN Parts Kit WDECD TN B 2006 Gerard Clemens 1 Properties of the decoder This simple self learning accessory decoder is based on the ATMEL AT Tiny2313 micro controller The decoder has 4 output pairs It has been designed for the DCC track protocol according to the NMRA standards For this reason the decoder is compatible with products and systems from Arnold Digital Uhlenbrock IntelliBox Lenz Digital Plus Roco Digital Fleischmann Twin Center Digitrax and Zimo These are the features of the decoder e Very simple self learning programming initiated with a push button and visualized with a LED e 8 diverse modes of operation all embedded in Firmware e ideally suited for e up to 4 dual coil motors for points turnouts and mechanical signals up to 8 single coil accessories like de couplers up to 4 signals with each 2 aspects up to 2 signals with each 3 or 4 aspects up to 8 generic outputs to switch accessories like illumination and the like Storage of the actual state and power up with last or predefined state like for signals Few and proven low cost electronic components Parallel decoding of the DCC track and processing of the outputs Can be externally AC powered Avoids wasting digital DCC energy for accessories Self healing overload protection Output current 0 5 A for each output Total current 1 A per decoder The decoder WDecD TN has been designed for use with multi protocol command stati
9. de 5 the continuous output pair on terminal block K5 will be flashing 180 phase shifted when activated red or be off when deactivated green 2 4 Wiring and operation in mode 6 In mode 6 you can toggle the state of each individual output of the decoder At each key stroke on your keyboard DCC central station the state of the corresponding output will change The change rate is limited to one complete cycle per second This limitation is enforced by command stations that keep repeating a DCC command for the configured duration of the turnout motor pulse or as long as the button is pushed down Pressing the button faster than twice a second will be ignored by the decoder 2 5 Wiring and operation in Mode 7 Mode 7 allows to control 2 separate groups of 3 continuous outputs and a single pulsed pair Turning an output on in a group of 3 will turn off both the other outputs This allows the user to control simple model signals with 3 aspects and jus one lamp per aspect In its simplest form a Dutch Railways NS signal has 3 aspects and 3 lights each representing an aspect A green lamp show go a yellow lamp shows slow and the red lamp shows stop like in a traffic light Such a signal can be directly controlled Gleis DCC Signal Verdrahtung Modus7 GRUN ROT Versorgung aus Modellbahntrafo alternativ DCC Schienensignal Doppelspulenantrieb Vr 2 oder Hp 2 Vr1 oder
10. e decoder address it would be sufficient to push any one of the 8 push buttons on your keyboard or DCC Command station First these push buttons should be related to the desired address of the decoder E g if you want to program decoder address 4 you relate the keys of your keyboard to the points 13 16 Using the Uhlenbrock IntelliBox you will have 16 keys available addressing the points 13 19 i e 2 subsequent decoders For programming the decoder only use the upper 8 keys WDecD TN V2 1 05 06 2006 6 of 13 Using Lenz LH100 you will only find 2 keys and which must be related to one of the 4 points on a decoder This picture shows the arrangement of the upper row of the IntelliBox point 1 pair 1 point 2 pair 2 point 3 pair 3 point 4 pair 4 Figure 6 IntelliBox arrangement of the 8 keys to operate the 4 points of one decoder 3 2 Setting the mode of operation The selection of one of the 8 keys decides about the mode of operation which the decoder will learn When you press key 1 red the decoder will assume mode 1 Pressing key 8 green will set the decoder to mode 8 The key number corresponds to the mode which the decoder will learn For every one of the 8 keys the decoder will learn the same address When using Lenz LH100 to program address and mode relate the an keys to the first point on the decoder for the modes 1 and 2 to the second point on this decoder for mode 3 or 4 and so on The following table shows
11. f the turnout motor In modes 1 the outputs will be de energized after 0 25 s In mode 2 the duration of the output impulse will be ca 0 25 s Modes 1 and 2 can also be used to run up to 8 single coil operated de couplers or a combination of turnout motors and de couplers Because of the limited duration if the output pulses it is almost impossible to overheat the point motor solenoids and or de coupler coils In each of the 4 pairs of outputs only one output can be active Energizing green automatically de energizes the red output and vice versa To control rotating motors DC motors for the operation of points you need to wire a bi Stable relay to the outputs With the form c contact of this relay you can now apply AC power to either one of the 2 direction inputs of the point motor The motor needs to have end of stroke limit switches For direct operation without relay of polarized turnout motors like the LGB EPL motor we specially designed the SDecD TN 4 channels and the UniDecD TN single channel decoders which can also operate on rotating motors or dual coil turnout motors 2 2 Wiring and operation in mode 3 In mode 3 the decoder offers 4 pairs of mutually exclusive continuous outputs Activation of one output of a pair automatically switches off the other output of the same pair As in mode 1 and 2 the blue in the graph colored terminals carry the supply voltage The red and green outputs switch to internal decoder ground
12. n in mode B ccccsececeeeeceeeeeeeeceeeeseeeeeueeseueeseeesaueeseeeseeeesseesaes 3 2 3 MOGES ANG Disenseseceinstueeceaceanitaskentecnsucectamctacneuuases sineseeenecnsaanetenisuaanseneuneeannbecnesnasans 4 2 4 Wiring ANd Operation IN MOE Goiriren re A R 4 2 5 Wiring ana operation In Mode 7 acrieienanene ne eee ee eee ee 4 2 6 Wiring and Operation in Mode 8 cccceccceeecceeeceeeeceeeeseeseuseseueeseeseeeeseessneeseeeeaes 5 2 7 Hints for the operation Of model SIQNAIS cccceccseeeceeeeceeeeeeeeceeeeseueeeeeeseueeseeesaes 6 Programming the OC COUCH satus chistes wuiohuntsisnbuetaai aN 6 3 1 Setting the decoder address aniani O 6 3 2 Setting the mode Of OPErAatiON sristi aana aa 7 PACU ALIN Storage ereenn EEEE EEEa 8 4 1 Memonzng Ne Mtak stale ata tervaast pate vans a T E Bite Mune T itn 8 Whata WDecpD TN Cannot dOnneiinee e ee ee 9 FISSOIVING DIODIGINS ereraa E satascaadaneees 10 6 1 Electromagnetic interferences cccccceecceeeceeeceeeceeeceeeseeeceeceeeseeeseeesseeseeeneeeses 10 6 2 Shorting and overloading the outputs ccccecccseeeceeeeseeeeseeeseeeeseeeeseeseueeseeeaes 10 6 3 Learning mode LED does not lIQNt cccceccseeecseeeceeeseeeeceuseceeeceeseseueeseeesseeens 10 6 4 Learning mode LED does not extinguish cccceecceeeeeeeeseeeeseeeseeeseeeeseeeseeeess 10 Parts KIL WIDECD TIN B oresoon EEEE EEE E E ERR AnS 11 7 1 Parts in the sequence of INSCMIONwiinsiicetici ania ti
13. ons It can be operated with stations like the IntelliBox and the Fleischmann Twin Center and other similar stations This product is not a toy It should not be used by persons younger than 14 years The parts kit contains many small parts and therefore it should be kept out of reach of children below 3 years Please read and obey all hints in this instruction manual Inappropriate use may lead to fire and or personal injuries The decoder has sharp edges and wire ends Please mount it in a safe place with sufficient ventilation The warranty period for the WDecD TN encoder is 24 months after purchase Arnold Digitrax Lenz Roco and Zimo are registered trade marks WDecD TN V2 1 05 06 2006 1 of 13 2 Wiring and operating the decoder The terminals 1 and 2 of terminal strip K3 must be connected to the DCC track signals The polarity of the DCC voltage has no influence on the operation of the decoder The terminals 1 and 2 of terminal strip K1 must be connected to a 14 18VAC model railroad transformer This transformer supplies the energy for the outputs If such a transformer is not available you can also retrieve energy directly from the DCC track voltage i e you can jumper the corresponding terminals of K1 and K3 This method has 2 disadvantages e The relatively expensive digital energy you retrieve from the track is no longer available to run locos You might sooner need an extra booster for the track voltage e The rectifier type
14. ons tienen 11 1 2 The schematic of the WDeCD TN cecceecceeeceeeseeceeeseeeseeeseessaeeseeeseeeseesseeees 12 WDecD TN V2 1 05 06 2006 13 of 13
15. t states for points Worst case this might lead to 4 coils energized simultaneously and might damage the decoder WDecD TN V2 1 05 06 2006 8 of 13 5 What a WDecD TN cannot do Though very universal and unique in its properties there are many things the WDecD TN cannot do respectively does not know about It cannot be programmed on the programming track in service mode The decoder does not know any configuration variables CVs lt does not respond to or react on DCC broadcast instructions special DOC commands addressing all accessory decoders at once The programming on the main POM during normal operation in operations mode is not supported many NMRA compatible decoders like the WDecN IN allow configuration changes during normal operation The outputs can only be switched on The DCC command to switch outputs off will be ignored The decoder automatically switches outputs off when the selected time is over or when another output within the same group is activated The DCC reset command is ignored Extended DCC commands will be ignored by the WDecD TN The WDecN IN another similar decoder in our portfolio accepts these commands and allows the application as sophisticated signal decoder Fading in and out between signal aspects is not supported see WDecN TN WDecD TN V2 1 05 06 2006 9 of 13 6 Resolving problems 6 1 Electromagnetic interferences Especially magnet coils with self interrupting contacts as the
16. the decoder damaged 6 4 Learning mode LED does not extinguish You pressed the push button on the decoder and the LED goes on When you now issue a command for an accessory the LED stays on and the decoder remains in the self learning state e Are you sure that your command station issues DCC accessory command Multi protocol digital command stations might be configured for the Motorola accessory protocol e Check the wiring of the DCC track signal Do you measure DCC signals on terminal strip K3 e Check your layout Did you remove all components which are not required for digital operation like spark suppressing capacitors or inductivities Are there any other electrical loads on your layout that might distort the digital track voltage Sometimes diodes and rectifiers cause problems e Check the hardware of the decoder Are all parts properly seated in their sockets Is de decoder damaged e Try to program the decoder directly at your digital command station If still not successful disconnect your layout from your command station and just connect the WDecD TN WDecD TN V2 1 05 06 2006 10 of 13 7 Parts kit WDecD TN B 7 1 Parts in the sequence of Insertion Component Qty Type Gridmm Name Diode 2 1N 4148 12 9 D3 D4 Resistor 4k7 1 5 R1 Resistor 1k 1 5 R4 Resistor 270R 2 5 R5 Programmed Processor 1 ATTiny2313 IC1 Output driver 8 fach 1 ULN 2803 IC2 Voltage regulator 5V 1 7805 IC3 Optokoppler 1 6N137 IC4 Push button 1 KSM612C
17. used on the decoder is intended for use with 50 60 Hz AC transformers It is not very well suited for usage on the higher frequent DCC voltage and may cause distortions on the DCC signal thereby preventing other decoders to interpret the DCC information correctly _ To wire the terminal strips K1 power supply and the decoder outputs on K4 K7 use atleast 26 AWG 0 14 mm stranded copper wire Preferred wire gauge would be AWG 18 0 75mm7 Keep your wiring as short as possible The decoder WDecD TN can be configured to run in 8 different modes of operation For each mode the wiring of the outputs differs 2 1 Wiring and operation in mode 1 and mode 2 DCC track Wiring in mode 1 and 2 green Point 1 red 14 18 VAC power from MRR transformer or DCC track voltage Figure 1 wiring the accessory decoder for mode 1 or mode 2 In these modes the decoder provides 4 pairs of pulsed outputs to run the traditional dual coil operated point motors The outputs will be energized only long enough to operate the point motor In these modes the outputs are organized in pairs Each pair has 3 terminals The middle terminal is the common power supply for the 2 coils The green terminal point Straight signal green safe and the red terminal point thrown signal red unsafe are WDecD TN V2 1 05 06 2006 2 of 13 connected to the corresponding wires o
18. y are frequently used in dual coil point motors cause a substantial amount of electro magnetic interference The decoder WDecD TN was constructed to withstand these interferences to a great extend Should problems occur like unexpected output resets try to avoid these unnecessary interferences with some simple measures e Keep the wiring between decoder and point motor as short as possible e Avoid antennas Do not guide power cables around the decoder e Twist the wires to the point solenoids e When you still experience problems you may consider inserting suppression diodes across the magnet coils e Alternatively you may insert a ferrite core in the common wire to your point motor 6 2 Shorting and overloading the outputs Though the decoder provides a self healing fuse this fuse may not be fast enough to completely protect the decoder against shorts to internal ground or the supply voltage The fuse offers good protection against overloads and protects turnout coils and the decoder output driver against too long excitation times 6 3 Learning mode LED does not light You pressed the push button on the decoder The LED does not light up e Please check the power supplied to terminal strip K1 Check the connection to your MMR transformer Can you measure an AC voltage of at least 14V You may also check the presence of AC power with a 14V light bulb e Check the general health of the decoder Are all parts inserted correctly Is
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