SBOOST II DCC Booster User Guide
Contents
1. Power Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST Il User Guide 11 Example 4 SPROG 3 SPROG II or other booster and SBOOST II with separate power supplies Using a SPROG 3 or SPROG II or other booster and SBOOST Il in this way is not recommended A short circuit in the SPROG 3 power district will affect the DCC signal to the SBOOST II resulting in the loss of the DCC signal in the SBOOST II power district Each power supply should be the same voltage Each power supply must be able to supply the full rated current at least 2 5 Amp A common ground connection is required between the power supplies Power districts must be separated by isolation gaps in both rails at of of Isolation Gap EE Power Power Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST Il User Guide 12 Auto reverse Operation The SBOOST II can be configured for auto reverse operation e g to supply power to a reverse loop or wye formation as a separate power district To enable or disable auto reverse operation you must open the casing of the SBOOST II and fit or remove a jumper link To open the casing prize the two halves apart by inserting a small flat bladed screwdriver in the slots and twisting gently as shown below Remove the small jumper from its parking location and re fit it to bridge the pins of J1 Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST Il User Guid2. each power district E g connect Tr A to the left rail in each power district and connect Tr B to the right rail in each power district BOTH rails MUST be gapped between power districts The SBOOST II track outputs must only be connected to their own power district i e there must be NO common wiring between power districts If a single power supply is used to power more than one SBOOST II it must be rated to supply the maximum current to all SBOOST II simultaneously E g for two SBOOST II the power supply must be rated at greater than 5 Amps If separate power supplies are used to power multiple SBOOST Il then they should all be of the same type and voltage rating The OV connections of all the SBOOST II must be connected together This is sometimes referred to as a booster home ground connection Considerations When Daisy chaining Boosters If a booster A which powers a track power district A is connected to a booster B which powers a track district B then a short circuit in power district A will remove the DCC signal to the input of booster B This will result in loss of power in power district B For satisfactory DCC operation daisy chaining of boosters in this way is not recommended Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST Il User Guide 8 Example 1 SPROG 3 or SPROG II driving multiple SBOOST II with common power supply The power supply must be able to supply the full rated current
3. Il User Guide 3 3 The DCC track voltage will be slightly less than the power supply voltage Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST Il User Guide 4 DCC Parameters Minimum Typical Maximum Units DCC signal input voltage DCC signal input current DCC signal input current DCC Input Track Output Delay 1 Vin 12V 2 Vin 18V LEDs Off Track power off Track LED Flashing Moderately Quick Flashing quickly Short circuit Flashing slowly No DCC signal DCC LED Flashing Quickly Valid DCC Signal Installation Connection to the SBOOST II is via 4 way pluggable terminal blocks as shown below DCC In Track Power Out Power In The following steps are required to install SBOOST II before you can use it for the first time Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST Il User Guide 5 e Connect to the Power Supply e Connect to the Layout e Connect to the Command Station Connect to the Power Supply Power supplies sold by SPROG DCC Ltd at the same time as an SBOOST II are supplied pre wired to the pluggable terminal block lf using your own power supply or the power supply provided by your dealer is not pre wired then it must be connected to the Power In terminals observing the correct polarity Connect to the Layout Connect the SBOOST II to the track using the track terminals Tr A and Tr B of the pluggable terminal bloc
4. e g at least 5 Amp for 2 x SBOOST Il Power districts must be separated by isolation gaps in both rails The SPROG 3 or SPROG II can be powered from one of the SBOOST II To further SBOOST Isolation Gap Power Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST Il User Guide 9 Example 2 SPROG 3 or SPROG II driving multiple SBOOST Il with separate power Supplies Each power supply should be the same voltage Each power supply must be able to supply the full rated current of the SBOOST Il i e at least 2 5 Amp A common ground connection is required between the power supplies Power districts must be separated by isolation gaps in both rails The SPROG 3 or SPROG II can be powered from one of the SBOOST Il To further SBOOST Isolation Gap Power Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST Il User Guide 10 Example 3 SPROG 3 SPROG II or other booster and SBOOST II daisy chained with common power supply Using a SPROG 3 or SPROG Il or other booster and SBOOST Il in this way is not recommended A short circuit in the SPROG 3 power district will affect the DCC signal to the SBOOST Il resulting in the loss of the DCC signal in the SBOOST II power district The power supply must be able to supply the full rated current i e at least 5 Amp for SPROG 3 plus SBOOST Il Power districts must be separated by isolation gaps in both rails Isolation Gap
5. SBOOST Il User Guide 1 SPROG DCC SBOOST II DCC Booster User Guide Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST Il User Guide 2 Introduction SBOOST Il is a DCC booster designed primarily intended for use with the SPROG II but also useable with other DCC systems to boost the track output current for driving a larger layout Requirements e Regulated DC Power Supply 12 20V 3A Features e Opto isolated DCC input for electrical isolation between the layout and the command station e DCC activity LED shows reception of valid DCC input e Power LED flashes when programming track power is live e DCC Track and power connections by pluggable terminal blocks e Power out terminals for SPROG II Specification Operating Conditions Parameter Minimum Typical Maximum Units DC Input supply 12V 20V V voltage Note 1 2 6 Vin supply current Note 2 A Output Load Operating Layout i Auto reverse 12 a detection delay Overload detection ms delay Overload cutout me delay 1 If using the Power out terminals the DC input supply must be limited in accordance with the equipment connected to the power out terminals 2 The current capacity of the power supply must be greater than the 2 5A current limit of the SBOOST II A suitable power supply is available from SPROG DCC Lid or our dealer network Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST
6. at least 3 5 Amps See Considerations When Daisy chaining Boosters below Connection to a SPROG 3 Follow the connection instructions for SPROG II The SPROG 3 is rated for the same maximum voltage as the SBOOST II and can always use the same power supply lf electrical isolation is required between the layout and SPROG 3 then a separate isolated power supply must be used If the track output of the SPROG 3 is also powering a track power district then the power supply must be rated at least 5 Amps See Considerations When Daisy chaining Boosters below Connection to Other Command Stations SBOOST II has an opto isolated DCC input and can be connected to the DCC output of most DCC command stations and boosters Multiple Power Districts Using SBOOST II If more than one SBOOST Il is to be connected between the command Station e g one of the SPROG family and the layout to give multiple power districts then care must be taken with both the DCC input connections and the track connections to ensure the same polarity at each SBOOST Il Connect all of the SBOOST II In A terminals together and connect to one output of the command station Connect all of the SBOOST II In B terminals together and connect to the other output of the command station Connect the Tr A and Tr B outputs to the layout in a consistent manner in Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST Il User Guide 7
7. e 13 When no jumper is fitted auto reverse operation is disabled When a jumper link is fitted auto reverse operation is enabled Auto reverse operation must not be enabled in adjacent power districts This may cause thrashing as both SBOOST Il try to auto reverse simultaneously For UK customers spare jumper links may be obtained from SPROG DCC Ltd on receipt of a stamped self addressed envelope They are also available from electronic component suppliers Refit the casing by lining up and gently squeezing the two halves together Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST Il User Guide 14 Troubleshooting Before reporting any problems please check the SPROG DCC webpages for any bug reports or updates Useful Links SPROG homepage htip www sprog dcc co uk for the latest information updates downloads etc for SBOOST Il SPROG DCC Yahoo group http qroups yahoo com group sprog dcc for latest news and discussion Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd
8. k Connect to the Command Station Connection to a SPROG II version 2 and earlier The pluggable terminal block is arranged to allow a straight forward connection to a SPROG II for both the DCC signal and to supply power to the SPROG II See below see the picture below Connect the SBOOST II DCC inputs In A and In B to the SPROG II track outputs Powering a SPROG II all versions There are two considerations to be taken into account when powering an SBOOST II and a SPROG II from the same power supply The electrical isolation between the layout and command station i e SPROG Il will no longer be effective Version 1 1 June 2015 Copyright 2015SPROG DCC Ltd SBOOST Il User Guide 6 The SPROG II has a lower maximum supply voltage of 15V compared to the SBOOST IT maximum of 20V When using an SBOOST II with a supply voltage greater than 15V special care must be taken For SBOOST II supply voltages above 17V a separate power source of the correct voltage must be used for the SPROG II For SBOOST II supply voltages in the range 15 17V you can use a separate power supply or insert a string of 3 1N4001 or similar diodes in series with the V connection to drop the voltage slightly Connect the SBOOST II V output to the SPROG II V input Connect the SBOOST II OV output to the SPROG II 0 input If the track output of the SPROG II is also powering a track power district then the power supply must be rated
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