A Pass-Over Section; Turning Loops In A Digital Layout; Troubleshooting - Roco Lokmaus 2 Manuel

between the DC transformer and the feeding track of the conventional section. The separator cuts the
connection between the DC transformer and the tracks automatically if the insulation between the two
sections is bridged by a train. So the short circuit detection of the Lokmaus 2
train can pass from one system to the other. Passing from the digital system to the DC-section the loco
decoder automatically detects the different feeding and assimilates the speed of the loco to the DC ten-
sion on the tracks. It also checks the polarity of the tracks. If it matches the sense of driving of the loco
then it continuos its run. If it doesn't match the train stops with the programmed deceleration delay.
To make it continue, you have to set the knob of the DC transformer to the middle (stop-position) and
re-start the train. In the same way the decoder reacts passing from the DC-section to the digital system.
In the digital section it immediately gets the digital information and regards these commands. It also
checks the information of the direction and in case that it doesn't match the train stops with the pro-
grammed deceleration delay. Now you must change the sense of driving of the train to make it re-start.
A pass-over-section
This simple wiring and procedure with the ROCO separator 10768 includes a small disadvantage if
there are several trains on the tracks:
Meanwhile one train passes the separation between the two systems the complete DC-section is
fed by the digital system. This causes all conventional locos to stop and all digital locos get digital
informations and could react according to those commands. This effect can be avoided by installing a
pass-over-section as shown in fig. 7 on page 38. This section must be longer than the longest train that
passes over it. It is insulated on both ends on both sides. A train that passes over this section only con-
nects the pass-over-section to the digital or to the DC system that is controlled by the separator. In that
way no digital information can enter the DC-section and influence the locos running there.
T
URNING LOOPS IN A DIGITAL LAYOUT
Everybody knows the problems caused by a turning loop in a conventional DC layout. Also on a digital
layout after a loop the left and the right track profile meet each other and would cause a short circuit
if you don't install a wiring that avoids this matter. The ROCO digital turnaround loop module 10769
solves the problems of a turnaround loop in the digital system. Separate the turnaround loop at both
ends on both track profiles as shown in fig. 5 on page 37.
The separated section must be longer than the longest train that will pass the loop. The feeding of the
turnaround loop is controlled by the turnaround loop module 10769. The modul itself is powered from
a track outside of the loop or directly connected to the amplifier or a booster.
The turnaround loop module 10769 works as follows: If a train enters the turnaround loop – doesn't
matter from which direction – and the polarity of the tracks before and inside the loop are not identi-
cal then a short circuit occurs inside the turnaround loop modul that is detected immediately and the
modul inverts the polarity of the loops. This happens so fast that the amplifier doesn't detect a short
circuit or that the train slows down. Now the loop has the right polarity to enter the loop. This proce-
dure must be repeated when the train leaves the loop, because now the polarity of the loop is wrong
for leaving it. For the digital operation of the trains the polarity of the tracks doesn't matter the train
is not disturbed if the polarity of the tracks is inverted. It can pass the loop without stopping and with
any action that would have to be done by you.
To make sure that the turnaround modul 10769 detects the short circuit fast enough you must adjust
the sensitivity of the modul by the lateral potentiometer (see instruction of the modul).
T -
ROUBLE SHOOTING
Headlights don't work correctly
speed step mode of the Lokmaus 2
and the loco-decoder don't flashes or
can't be switched on match.
The speed step mode for the address of the loco at the or off
Lokmaus 2 is wrong or the CV29 is programmed faulty. How
® ®
to define the speed step mode see page 25 how to program
the CV29 you find on page 27.
is not activated and the
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