Knowledge base: Powerpack (SPP)

SUSI sound

What are the CV settings for the Train-O-Matic powerpack (SPP)?

A:     CV 29 = 10 (analog mode off, as the powerpack doesn’t work with analog mode on)

    CV 123 = SPP time out; time that the powerpack will give the extra power. Default value is set to 16, which is 0.25 seconds. Value 255 is 4 seconds

    CV 124* = SPP delay; Start up delay. Value in seconds. Default is set to 10, so SPP will be activated after 10 seconds. This is useful when you have more trains with a powerpack and they don’t all start grabbing power the moment the system is turned on.

*Note: Before firmware 233 the start up delay was set with CV 152. Firmware 233 and above use CV 124 for  the start up delay.


Powerpack is not working in analog mode

When analog mode is turned on (CV29, value 14), the powerpack is not working. Set CV 29 to value 10.


How to connect the Smart Powerpack to a Train-O-Matic Lokommander 2 decoder

Everything you need to know is explained in the manual, but here’s a quick overview.

Separating the supercapacitor from the electronics board

If you have limited space, you can separate the supercapacitor from the board by desoldering it, or just simply cut the connectors. Make note of the position of the + and -. The + is also marked next to the connector on the board. Extend the connection with wire. Make sure not connect the + of supercapacitor with the - of the board and vice versa, as this will destroy the unit. One note though: by cutting the wires, you are voiding the warranty and it is at your own risk. But if you have tested the SPP on forhand to make sure it is working well and you connect the wires correctly by just extending the connection, you should not experience any problem.


Using the Train-O-Matic SPP with ESU decoders


I. LokSound 4 configuration for SPP


The SUSI Clock pin is shared with the SPP Charge Control in the Loksound 4 decoders, which is AUX6 output of the decoder. For these reasons an external  SUSI decoder and a SPP can't be used in the same time.

If the SPP control will be used, the SUSI must be turned OFF. 

Settings to change:


CV124 : 16 (Clear bit3 in CV124. The default value of CV124 is 24 (SUSI ON), so write the new value 16)


The function as AUX6 also has to be disabled. This has to be done by programming the following CVs, in the described order:

CV31 = 16

CV32 = 0

CV315 = 0 (default value = 1)


SPP timeout; CV113:  0-255 (in multiple of 0.016384 seconds)

For wire connections, please image at the right.


II.  LokSound 5 configuration for SPP


For Loksound 5 the AUX9 has to be configured as SPP Charge Control.

This has to be done by programming the following CVs, in the described order:

CV31 = 16

CV32 = 0

CV339 = 31


For Loksound 5 Micro the AUX7 has to be configured as SPP Charge Control

This has to be done by programming the following CVs, in the described order:

Write    CV31 = 16

Write    CV32 = 0

Write    CV323 = 31


SPP timeout; CV113:  0-255 (in multiple of 0.016384 seconds)

For wire connections, please image at the right.

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