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dann ist wie folgt zu verfahren (gilt für die 2. und eine eventuelle 3. Maschine gleichermaßen auch bei Ana-
logbetrieb): Alle elektrischen Verbindungen zwischen den Rädern und dem Motor (sind E-Loks als geführte
Triebfahrzeuge beteiligt, müssen sie auf Unterleitungsbetrieb gestellt werden) sind zu trennen, entweder durch
Wegbiegen der Radschleifer oder – besser – durch Ablöten der Stromzuführungen von den Radschleifern zur
Schaltplatine. Die Motorstromversorgung erfolgt dann über zwei der vier Pole der Kupplung von der führenden
Lok aus, indem der Motor der geführten Lok parallel an die Motorkontakte auf der Leiterplatine der führenden
Lok angeschlossen wird. In beiden Fällen ist auf die richtige Polung der Leitungen zu achten.
4-pole H0-coupling
This coupling conducts power and control current between locomotives, between locomotives and
wagons as well as between wagons only. Can be installed in most ROCO H0 rolling stock as well as in
vehicles of other model railway manufacturers whose rolling stock is equipped with standard NEM 362
coupling pockets (see fig. 1).
Electrical load carrying capacity: maximum continuous load 1.0 amp.
Installation of these couplings should only be done by model railway builders who have
both craftsman skills and necessary knowledge of electric circuitry, otherwise it is recom-
mended to have the installation done by a professional model railway repair shop!
Coupling/Uncoupling
Coupling and uncoupling must be done manually by gently pushing the couplings together or pulling them apart.
Be careful when pushing them together that both couplings are properly positioned to avoid damaging the con-
tacts blades (see fig. 2). Automatic coupling / uncoupling as well as delayed uncoupling is not possible.
Possible applications
1. Makes complete push-pull train operation possible. 3 poles are used for AC, 4 poles for DC operation.
2. Push-pull operation is also possible with catenary (overhead). Use one electric locomotive at one end
of the train and a driving trailer with operating pantograph at the other end.
3. Real double-heading *) with analog operation. One locomotive provides current pickup, the second
locomotive is supplied with current and controlled by the first. This can be done as well with digital
control if a decoder with sufficient power to operate two motors is installed in the locomotive (ROCO
decoders 10738/10739/10741/10742/10745 cannot be used).
CAUTION only one locomotive must bequipped with a decoder!
5.
Real double-heading *) rather than simply adding another locomotive with analog operation, i.e. the
front locomotive "engineer" controls the second locomotive (instead of two "engineers" control
the second locomotive separately.
6.
Correct operation with in-train helper locomotive(s) *) for heavy goods trains possible with analog
operation (see above description under "double-heading").
Train lighting can be done from one locomotive or one coach in both analog or digital operation (with
digital operation from one lighting decoder as well). Only one vehicle needs current pickup (reduces
cost and friction due to wheel contacts, wipers, etc.). 2 poles are sufficient for this application.
*) IIf two or more power units (lokomotives) are used within one train the following
peculiarities must be taken into account:
If locomotives are used which have not yet a NEM interface the following applies: depending on mode of
operation the current leads from the wheels to the circuit board must be disconnected (e.g. bending of the
wheel wipers or unsoldering the leads from the wheel pickups to the circuit board). When using locomotives
with digital decoders proceed in a similar manner, but it is again advised that only the leading locomotive
should have a decoder which has to provide the necessary current supply for several locomotive motors.
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