5
CONNECTIONS SCHEME
3.6. SUPLEMENTARY RELAYS
The supplementary relays on the start and stop
outlets will protect the Diesel-control from possible
anomalies from problems arising from the high power
which the distributor or electro-magnet needs for its
correct working.
The relays used will be 12v, with a shorting
capacity of 20 or 30ª. These relays are the type usually
used in the motor industry.
The supplementary relays can be placed inside
a sealed box of the type used in electrical installations,
which will be mounted as close as possible to the
engine.
The cables (1.5 mm2 sections) which govern
the supplementary relays will come out of terminals 2
and 3 (start and stop). These cables carry the positive
to the pole of the winding.
3.7. OPTION WITH PREHEATING
The units delivered with this option incorporate
another button on the frontpiece where the timing (in
seconds), of the preheating to be carried out before
the attempt at starting, can be programmed.
To connect the heater, in the connection housing
there will be a loose terminal which comes from the
positive. Place a relay like those described above
here.
CONNECTIONS SCHEME
3.8. OPTION FOR PETROL ENGINES
Only for the units that they have this option.
In petrol engines, which generally do not have
oil pressure gauges, the detection of the start is
determined by the moment when the alternator begins
to generate electrical tension.
For the connection of the unit it is sufficient to
take one of the poles of the alternating current
generated by the alternator to input terminal no.5
before it enters the rectifier. (See the following
diagram).
