Lenz Digital plus LZV200 Manuel D'utilisation page 35

For extended routes you need additional points of current supply at
regular intervals.
Fig. 11: Connection 2-wire tracks
No radio interference suppression capacitor may be
installed in the track system. This capacitor is necessary
only for the interference suppression in conventional
operation. If used with the Digital plus system, however, it
would distort the data format and interfere with the fault-
free transmission of data.
Important:
A mixed digital operation using overhead and track lines is not
permitted. In this type of operational mode, if the locomotive is sitting
on the track in the wrong direction (which might be the case e.g. after
having driven through a terminal-loop), the installed locomotive
decoder can be destroyed by overvoltage! We recommend operation
using track pick-up, because the reliability of contact (and therefore
the transmission of digital signals to the locomotive decoder) is
substantially greater than it is when operating with overhead lines.
Conventional and digital electric circuits must always be consistently
separated from each other, e.g. by installing breaker tracks or
insulating rail connectors between digital and DC operating ranges.
The establishment of an electrical connection between the digital and
the conventional (e.g. when passing over the separation point) must
be prevented by suitable circuit measures.
Fig. 12: Connection track with neutral wire
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