Roco Z21 dual BOOSTER Manuel D'utilisation page 52

Z21 Booster
®_
The length of the stopping section corresponds with a maximum train length plus the braking distance
(alter the decoder setting if necessary).
In the basic state, the stopping section is supplied with the normal track signal by the the control centre
(or a booster) via the 10777 signal module.
The circuit track "C" only activates the stopping process in front of the signal if the signal is set to "stop"
(red). If the signal is set to "stop" and the first axle of the train crosses the circuit track "C", the 10777
signal module no longer supplies the stopping section with power from the control centre, but from the
brake generator. Please take the maximum train length into account: the full length of the train is to
be located in the stopping section at the time the switching takes place as a crossing of the separating
point is no longer permitted after this has taken place. The train stops as from circuit track "C" with its
programmed braking delay. The locomotive functions retain their status: if the locomotive headlight was
activated, it remains on – if it was deactivated then it remains off. Should carriages with interior lighting
exist, these remain on if they were activated before the braking section was reached. Through-wired
trains and carriages with eight-point power consumption because they are unable to bypass the insulation
of the section. The train reliably comes to a halt (adapt programmed braking distances to the size of the
system!). Push-pull trains and multiple tractions stop at the correct position because it is always the case
that the stopping process is triggered by the first axle – including that of a driving trailer -.
When the signal is set to "free travel" (green), the 10777 signal module reduces the power supply for the
stopping section to the normal track signal from the control centre (or a booster), resulting in the train
starting to slowly move again using the CV-3 acceleration value in the locomotive decoder.
The circuit track "B" resets the signal to red after the train has passed it. An optional circuit tack at module
input "A" would cause it to return to green after the train has passed the following section for example.
The signal module shown in this switching concept only works in one direction of travel together with the
brake generator.
IMPORTANT: it is to be ensured when using occupied detectors with a joint terminal post (10808:
Input "N", 10787: Output "+"), that only one braking section is behind the 10777, i.e. the con-
necting of diverse braking sections (and/or booster outputs, and/or the control centre output) to
the same joint terminal post on the detector is not permitted. The power circuits of the braking
sections are to remain disconnected from the occupied detector or the result would otherwise be
short circuits after the switching status of the 10777.
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