Haltech E6M - Manual (Page 131)

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Figure E.2
In the previous examples the trigger edge has been shown as the first edge of the trigger pulse.
The trigger does not necessarily have to be the first edge of the trigger pulse. Consider the
example shown in figure E.3. In some trigger devices the pulse given for cylinder one would
be a different width than the pulses given for all the other cylinders. If the first edge, in this
case the rising edge, was used as the trigger edge then there would be a variation of 20°
between the trigger for cylinder one and all other cylinders. This would lead to cylinder one
being 20° more advanced than all the other cylinders and obviously this would be
unacceptable. The answer in this case would be to set the trigger point so that it is at a falling
edge and to have the trigger degrees set to 60° BTDC.
Figure E.3
Most square wave triggers require the following connections:
Power: +5Vdc - +12Vdc
GND: 0V
Signal: switches between GND and Power (there can be multiple channels depending
on the application i.e. trigger and home for direct fire and sequential injection).
Note: The E6H can be triggered by a reluctor (magnetic coil) trigger if an
external reluctor adaptor is used to supply the E6H with a square wave trigger.
An appropriate adaptor is available from your Haltech Dealer.
E.1.1 Hall Effect Sensors
The Haltech hall effect sensor is a two channel device that can be used to trigger the Haltech
range of ECU’s in a wide range of applications.