[Translate to Englisch:] Zusatzanleitung > NEU< Dieseltriebzug BR VT 12.5

This manual supplement is for model train operators that want to refit the Diesel Multiple Unit type BR VT 12.5

Item no. 741201
and make it run digitally. It is imperative that also the control cab coach is equipped with a decoder.
Should that not be done the following will happen as it did already for some customers:


In the event that the motor coach is equipped with a decoder
685301 according to the present directions you will hear
a fierce chirping in the control cab coach once you place it on the tracks. The reason for that is the
condenser on top of the direct current plug in the control cab coach. Furthermore a
TWIN-CENTER will be overheated by the condensor and will
cut-out in a comparatively short time.
The condenser also “bends” the DCC signals. Depending on the control unit
to programm, drive, and read is no longer possible.
The same symptoms occur in principal if a generic decoder is used. It is
very important to pay attention to the correct
line up of the pins when the decoder is installed. If the decoder is installed turned around
(flipped 180°) nothing will happen to the 685301 because the decoder is
protected against that possibility. In many cases this protection
is not featured at the generic decoders and the decoder can be damaged. The
correct lineup of the pin that are marked with “1” can be taken from the manual that is
enclosed in the package. (This phenomena does hardly ever occur any longer and is almost forgotten
since the twist protection interface is no longer there.
The VT 12.5 is equipped with a pick-up shoe, that means that the
electricity supply is always done by the
vehicle that is first in the direction of travel. If the motor coach is operated by itself it is the front which is in the
direction of travel. If the direction is inversed the
motor coach loses the electricity supply. Only if the control cab coach
is reconnected the vehicle will work again.
During programming alternating motor impulses of
different polarity are being sent to the motor. The motor coach will
cut out very quickly by itself.
If both vehicles are equipped with a decoder the
driving will be no probem.
In the event that the vehicle is supposed to be programmed with two decoders it will
only be possible to programm two identical CVs with the same
content in parallel. Nevertheless the decoders are able to relate back
quality control signals at different times which will be interpreted as an error
by the TWIN-CENTER for example.

So much to this expanded information.