Haltech E6S - Manual (Page 115)

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If using a “reluctor” type for the HOME signal input:
•
The Positive pin from the “Home” reluctor pick-up must connect to the input
of the onboard “HOME” reluctor adaptor (PIN E (HOME), on the Trigger
Input plug).
•
The Negative pin from the “HOME” reluctor pick-up must connected to the
negative “HOME” reluctor adaptor input (PIN C (INPUT A), on the Trigger
Input plug).
If you cannot tell which wire is the positive from markings or wire colour, then it would be
necessary to check the signal going into the E6S using an oscilloscope.
When ferrous metal (metal that a magnet will attract) is passed very close to the pole piece,
the pickup will generate a voltage similar to figure E.5a on the positive wire. The amplitude of
the signal will vary with the speed at which the ferrous metal passes the pole piece. At low
speeds the signal may only be several hundred millivolts, but at high speeds it could rise to 20
volts or more. The sudden drop in the signal from positive to negative seen in figure E.5a
corresponds to the metal being directly in line with the sensor. As can be seen, the signal is
not a square wave required by the E6S, and at low speeds the signal amplitude is too low.
The voltage input of the reluctor adapter must first go to a positive peak, which arms the
circuit. When the signal rises to approximately 70 - 80% of the peak value the reluctor adapter
will generate a falling edge, and when the signal crosses zero volts a rising edge triggers the
Haltech ECU. If the wires are reversed and the signal goes negative first, the Reluctor adapter
will generate a pulse but it will NOT trigger the E6S correctly resulting in incorrect ignition
timing. An incorrectly wired reluctor will retard ignition timing as RPM increase or generate
multiple triggers. Incorrect wiring of a reluctor trigger can cause major problems. If you are
using a reluctor pickup ensure that they are wired with the correct polarity.
E6S INTERNAL SWITCH SETTINGS
Normal configuration of the E6S is for a Hall Effect input. To configure the E6S for a reluctor
type pickup it is necessary to remove the enclosure endplate on the opposite side of the main
harness connector and configure the DIP switches on the right hand side of the unit. Below is
a table of different DIP switch combinations.
SWITCH POSITION FUNCTION
A DOWN Enable Main Trigger out from reluctor adaptor
B DOWN Enable Main Trigger into reluctor adaptor
C DOWN Enable Home out from reluctor adaptor
D DOWN Enable Home into reluctor adaptor
E UP Set if reluctor is not Motronic (see next section)