Haltech E6M - Manual (Page 139)

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E6M and E6M-8 ONLY
E.2 Reluctor (Magnetic Coil) Triggers
The E6M is capable of accepting a reluctor (magnetic coil) trigger since it has and
onboard reluctor adaptor. A reluctor Adaptor converts the sine-like waveform from
the reluctor sensor to a square wave signal that the ECU can understand. Such triggers
can be mounted on the crank or cam depending on the application.
Note: Any combination of hall effect, optical or reluctor type pick-up may be
used for the “trigger” (main ignition event) and “home” (sync. Event) inputs.
However, reluctor type pick-ups must be connected to their respective reluctor
adaptor input.
The onboard reluctor adaptor actually has two independant channels. One is
for the “trigger” signal. The second is for the “home” signal.
Each reluctor adaptor channel used requires two wire connections.
The magnetic pickup is basically a piece of wire wrapped around a magnetic core and
attached to the sensor face, which is called the pole piece. The physical size and shape
of such a pickup can vary greatly. This type of pickup has either two wires (one
positive (+), and the other negative (-)), or three wires with the third being a shield.
The wires are sometimes marked as such, but more often than not they are unmarked.
Note: If using a reluctor (magnetic coil) trigger for the TRIGGER signal input:
The Positive pin from the pick-up should be connected to the input of the
onboard reluctor adaptor (PIN B (TRIGGER), on the Trigger Input plug).
The Negative pin from the “Trigger” reluctor pick-up must connect to the
negative reluctor adaptor input (PIN D (INPUT B), on the Trigger Input plug).
If using a reluctor (magnetic coil) trigger for the HOME signal input:
The Positive pin from the pick-up must connect to the input of the onboard
reluctor adaptor (PIN E (HOME), on the Trigger Input plug).
The Negative pin from the “HOME” reluctor pick-up must connected to the
negative reluctor adaptor input (PIN C (INPUT A), on the Trigger Input plug).
Note: If a motronic trigger is being used refer to section E.3 Motronic Type
Trigger as the wiring has some variation.
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 E6M 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 is proportional to 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