Sices HS 315, Техническое руководство

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Technical Handbook 47
To measure the engine rotational speed, you can use a magnetic pick-up placed on the fly-
wheel, or use the W speed signal on the battery recharge alternator. The connection must be
made with a shielded cable, with grounded shield.
In the case of engines equipped with digital control unit the rotational speed is measured
directly via CAN-BUS.
You can use either two ground insulated wires pick-up, or a one-wire pick-up with the thread
screwed onto the grounded engine (GND), which is the return connection for the signal; the
two-wire isolated pick-up is however recommended.
The signal is sinusoidal; the frequency depends on the rotational speed of the engine and on
the number of revolutions of the flywheel.
The maximum input voltage with the engine in standard operation is about 3Vac; in case
voltage is lower, the signal can be increased by turning the pick-up to bring it closer to the gear
wheel, paying the utmost attention not to hit it when turning the flywheel.
Connections:
JM-5 pick-up signal positive input
JM-6 pick-up signal negative input
With the one-wire pick-up, only connect the JM-5 .
Usually, you can use a single pick-up, connected either to a HS315 or to another device, such
as a speed regulator, but paying attention to the polarity of the connections. Check also that
the signal amplitude is enough.
The number of teeth of the flywheel must be set in the P.0110 parameters; by entering 0, the
pick-up measurement is disabled.