Advertisement
NEXUS R5 WIRING
Crank (Trigger) and Cam (Home) Inputs
The crank and cam position sensors are
required so that the ECU has the necessary
information available to determine engine
speed and position at any point in time.
Generally two sensors are required - a cam
position and crank position, however many
engines will have just a cam position sensor
that is capable of giving the ECU enough
information to run the engine correctly.
Vehicles that have a crank position sensor only
are not capable of determining the difference
between compression stroke and exhaust
stroke and therefore are not suitable for
sequential fire applications.
In this case a cam position sensor may need to
be added.
It is recommended that four-core or twin-
core shielded cable is used for crank and cam
position sensors. Shields must be terminated to
battery ground at one end only.
Specs:
• -5V to 5V input
• 1 million samples per second
• Selectable 1k2 or 440R pull-up to 5V
• Selectable ground reference (full differential
standard mode)
• -75 to 75V indefinite withstand
• 48kHz max signal frequency
Example Wiring Connections
+12V
Signal Ground
Crank (Trigger) (+)
Crank (Trigger) (-)
+12V
Signal Ground
Crank (Trigger) (+)
Crank (Trigger) (-)
There are two common types of crank/cam
sensor signals:
• Hall effect/optical signal
(0-5V digital square wave signal)
Hall effect sensors usually have 3 wires; a
power supply (5V, 8V or 12V), a ground and a
signal out wire. The power supply can be taken
from the Sensor +5V pin, sensor +8V pin or a
HCO as required.
18
Hall E ect Sensor
+
-
o
X
indicates not connected
Please isolate and insulate
X
to avoid damage to ECU
Reluctor Sensor
X
X
+
X
indicates not connected
-
Please isolate and insulate
to avoid damage to ECU
• Reluctor signal (analog style signal)
This type of sensor will generally only have two
wires, signal positive (+) and signal negative ( - )
Sensors with a +5V supply do not require the
pull-up resistor be enabled, for example, rotary
trim modules.
Any sensor +5V pin can be used with any signal
ground pin for sensors.
Advertisement
