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NEXUS R5 WIRING
Synchronised Pulsed Inputs (SPI)
Synchronised Pulsed Inputs are capable of
measuring the position, duty cycle, frequency or
state of a signal, as well as analog voltage inputs.
These inputs are suitable for sensors such as cam
position sensors, fuel composition sensors, road
speed sensors and flat shift switch.
Synchronised Pulsed Inputs are compatible with
digital (hall effect or optical) and reluctor (analog)
based sensors, have a maximum input voltage
rating of 25V and can measure up to 50KHz
Maximum frequency.
Specs:
• -10 to 10V digital input
• 0 to 5V analog input
• 1 million samples per second
• Selectable 1k pull-up to 5V
• -15 to 30V indefinite withstand
• 22.5kHz signal frequency max
SPI
SIGNAL GROUND
HCO
FREQUENCY BASED FLEX FUEL SENSOR
FLEX
FUEL SENSOR
FUEL SENSOR
TO OTHER
DEVICES
KNOCK
SIGNAL GROUND
KNOCK SENSOR
Knock Inputs
A knock sensor detects engine knock and sends a
voltage signal to the ECU.
The NEXUS R5 ECU uses the knock sensor signal
to modify ignition timing if knocking occurs.
Knock detection can be performed by the ECU by
installing a compatible piezoelectric knock sensor
mounted to the engine block.
It is recommended that twin-core shielded cable
is used for knock sensors. Shields must be
terminated to battery ground at one end only.
Specs:
• -2.5 to 2.5V AC input only
• 160Hz to 48kHz signal frequency band
• +-3V indefinite AC voltage withstand
• 50V indefinite DC withstand
Example Wiring Connections
Example Wiring Connections
Analogue Voltage Inputs (AVI)
Analogue Voltage Inputs are inputs to the ECU that
accept variable voltage signals from 0V to +5V
such as signals from pressure, temperature and
fuel level sensors.
AVI inputs can tolerate a maximum input voltage
of 30V.
These inputs can also accept switched inputs that
change between two different voltage levels.
The On Voltage and Off Voltage define what the
thresholds are between the on and off states.
The voltage can be viewed as a channel in NSP to
determine the thresholds for a switched input.
Common examples of switched inputs include A/C
Request switch and intercooler spray switch.
AVIs have a software selectable 1K pull-up
resistor to 5V, which can be enabled or disabled
within the setup page.
Pull-up resistors are generally enabled for
temperature related sensors and switched to
ground inputs.
Specs:
• 0 to 5V
• 1000 samples per second
• Selectable 1k pull-up to 5V
• -10 to 30V indefinite withstand
• 1.5kHz signal frequency max
• All capable of DBW/narrowband use
TEMPERATURE
AVI
SIGNAL GROUND
SENSOR
AVI
SIGNAL GROUND
5V
ROTARY TRIM MODULE
HT-010504
TEMPERATURE
AVI
SIGNAL GROUND
SENSOR
AVI
SIGNAL GROUND
5V
ROTARY TRIM MODULE
HT-010504
Pull-up resistors are generally enabled for
temperature related sensors and switched
to ground inputs. The following configuration
requires the pull-up resistor be enabled.
Sensors with a +5V supply do not require the pull-up resistor
be enabled, for example, rotary trim modules.
Any 5V pin can be used with any Signal Ground pin
for sensors.
HT-011000
Summary of Contents for NEXUS R5
Page 1: ...1 QUICK START GUIDE...
