Table of Contents
Advertisement
NEXUS R3 WIRING
Example Wiring Connections
HBO 1
Half Bridge Outputs (HBO)
Half Bridge Outputs are push-pull Pulse Width
HBO 2
Modulated (PWM) outputs that can be used to
control DBW throttle motors, idle air stepper
motors or electronic wastegates.
HBO 3
If not being used as push-pull drivers, Half Bridge
Outputs on the NEXUS R3 can also be used as
HBO 4
generic high side or low side outputs capable of
driving 8A to 12V, or sinking 8A to ground.
The NEXUS R3 supports up to two DBW
When used for DBW throttle motors, any HBO pair
throttles, independently controlled in
can be arbitrarily used and assigned (e.g. HBO 1
closed loop. Any pair of HBOs can be
and HBO 4) in the DBW wiring settings in the NSP
assigned in NSP to control each throttle
software.
motor.
Specs:
Example Wiring Connections
• Number of channels: 6
• 8A to 12V (high), or 8A to ground (low) output
• 5A max when used as push-pull PWM (eg DBW)
• Automatic overcurrent and overtemperature
protection
HBO
• 0 to 27V feedback
• High side current feedback
• 18kHz switching speed in DBW mode
Unused HBOs can be used as:
• Generic push/pull 2.2kHz PWM output
DBW THROTTLE 1
DBW THROTTLE 2
BATTERY
ELECTRIC WATER PUMP
GROUND
18
Digital Pulsed Outputs (DPO)
Example Wiring Connections
Digital Pulsed Outputs are capable of producing
pulsed waveforms with varying duty, varying
frequency, or switched states. When a DPO is
activated by the VCU the output will switch to
ground.
25A-HCO4
DPOs can be used to control various low-current
devices such as shift lights, bypass air control
valves, boost control solenoids, tachometers etc.
Specs:
• Number of channels: 6
• Selectable 4k7 pullup to 12V, to 5V, or disable.
25A-HCO3
• Overcurrent, overheat, and flyback protection
• Low side drive (3A max current)
• 10kHz switching speed
• 0 to 27V feedback
25A High Current Outputs
Unused DPOs can be also be used as:
The NEXUS R3 features four high/low outputs
• Generic PWM outputs
capable of sinking 25A to ground and driving 25A
• Low speed digital switch inputs (0-12V) with
to 12V. Each output has a programmable fuse
pullup enable
current, slow-start current and duration. Once the
Example Wiring Connection
electronic fuse blows the output turns off for a pre-
programmed delay duration before reactivating
the output. You can use the NSP software to define
+12V (HBO6)
BOOST
BOOST
the maximum number of retries before the output
CONTROL
CONTROL
is deactivated until the next VCU reboot. The VCU
SOLENOID
SOLENOID
LEDs conveniently display the output state.
25A HCOs are PWM capable and can be used
DPO
for ignition power and injector power as well
as to PWM thermofans and fuel pumps, control
BOOST SOLENOID
BATTERY
GROUND
THERMOFAN
BATTERY
GROUND
FUEL PUMP
transbrake solenoids, nitrous solenoids etc.
Specs:
• Number of channels: 4
• 25A source or sink current output
• Automatic high and low side overcurrent
and undervoltage lockout protection
• 0 to 30V feedback
• High and low side current feedback
• 1kHz switching speed
• Capable of 0-100% duty cycle
19
Advertisement
Table of Contents
