Haltech E6X Manual Win Version - Manual (Page 133)

E6X Manual
133
APPENDIX E TRIGGER INTERFACE
Trigger Interface
The ECU is capable of accepting many different trigger patterns and trigger types. This
appendix will explain the various trigger systems the ECU supports.
The following fields configure the trigger input: (Refer to 4.2.3 Ignition Set-up Page, p41)
Trigger Input
Trigger Edge
Trigger Angle
Trigger Pull-up
Trigger Reluctor Gain
Trigger Motronic Filter
Trigger Type
The trigger interface will be described below in terms of the above fields to simplify
configuration of the ECU trigger interface.
E.1 The Trigger Input
The 3 common trigger sensors used to trigger the ECU are: reluctor, optical and Hall effect.
Optical and Hall effect trigger sensors are electrically identical when used with the ECU and
from here on any reference to Hall effect triggers refers to optical triggers also. Reluctor
trigger sensors produce a different signal to that of Hall effect sensors.
E.1.1 Hall effect and Optical Triggers
Hall effect and optical triggers produce a square wave signal when connected to the ECU and
can be treated the same electrically. The ECU specification allows the use of a Hall effect
device that outputs a low of 0V and high of between 5V and 12V, the switching threshold is
set to 2.5V. Most Hall Effect sensors will require the internal pull up resistor to be switched
on. Hall effect sensors normally have 3 or 4 connections: power, signal (x2) and ground, this
is by no means the only classification that should be used for sensor identification, if in doubt
contact your haltech dealer.
Below is a trace of the signal of a “Standard Trigger” for a 4-cylinder distributor. The trigger
device has 2 signal channels and would have 4 connections: power, ground, trigger and home.