User Manual
User Manual
V1.2
2017.03
LED
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Using this manual
Legends
Warning
Important
Hints and Tips
Reference
Before Flight
The following tutorials and manuals have been produced to ensure you to make full use of your
N3.
1. In the Box
2. Safety Guidelines and Disclaimer
3. Quick Start Guide
4. User Manual
Make sure all of the parts listed in the In the Box document are included in the package.
The information in the Safety Guidelines and Disclaimer document affects your safety and your
legal rights and responsibilities. Read this entire document carefully to ensure proper configuration
before use.
Follow the Quick Start Guide step by step to setup and use the N3 correctly by referring to the
User Manual and using the DJI Assistant 2.
The N3 is a powerful systems. To make use of all their capabilities, read the user manual
thoroughly before configuring the device.
2 © 2016 DJI All Rights Reserved.
Contents
Using this manual
Legends
2
Before Flight
2
Product Profile
4
Introduction
4
System Components
4
Installation
7
Overview
7
Preparation
8
Start the Installation
11
N3 Functions
19
Compass Calibration
19
Flight Functions
20
Protection Functions
23
Flight Limits and Flight Restriction Areas
25
Using with DJI GO app
29
Triple Modular Redundancy
32
SDK
33
Flight Control System Checklist
33
Hardware Checklist
33
DJI Assistant 2 Checklist
33
Flight Safety
34
Appendix
34
LED Indicators
34
Troubleshooting
35
Specifications
36
© 2016 DJI All Rights Reserved.
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N3 User Manual
Product Profile
Introduction
The N3 is a third generation NAZATM flight control system designed for serious multi-rotor
enthusiasts. It is a reliable and robust system with double IMUs and can be expanded with external
high-performance sensors. It uses advanced control algorithms and sensor fusion algorithms to
maintain complete stability and integrity of the aerial system.
The N3 is fully compatible with the DJITM Onboard and Mobile SDKs and other DJI products,
allowing developers to optimize the system for specific applications. When used with DJI
Lightbridge 2, it provides direct access to DJI GO features including Intelligent Flight Modes.
With all essential components integrated into the N3 flight controller (including double IMUs,
barometer and data recorder), the device is powerful and highly compact to work together with the
GNSS-Compass module (including GPS and GLONASS), PMU module and LED module.
LED
System Components
How the System Works
The flight controller is the core module of the N3 fight control system, which utilizes the IMU,
barometer, GNSS and compass to realize accurate attitude control and high-precision positioning
for the aircraft. Multiple interfaces for SDK development and DJI devices, such as the Zenmuse
Z15 gimbals, are also provided. The DJI Assistant 2 software allows you to configure parameters
for installation, flight control, and other accessed devices. A simulator is also available for
simulated flight practice. When used with the DJI Lightbridge 2, the N3 has direct access to
features in the DJI GO app such as Intelligent Flight Modes.
4 © 2016 DJI All Rights Reserved.
N3 User Manual
N3 and N3 Pro Parts
Flight Controller
Feature Highlights
1. Independent CAN1 and CAN2 ports and API Serial port for the Onboard SDK. The CAN1
port is used to connect the GNSS-Compass and DJI devices while the CAN2 port is used to
connect SDK devices.
2. Built-in inertial sensors for the measurement of aircraft attitude and built-in pressure sensor for
the detection of aircraft altitude.
3. Support for multiple receiver types. If used with the DJI Lightbridge 2, the N3 has direct access
to features in the DJI GO app such as Intelligent Flight Modes.
4.M1 to M8 are used to connect the ESCs of the aircraft and iESC for DJI Intelligent ESC
communication.
5. 4 independent and configurable output ports and 4 I/O ports. These ports can be customized
and connect other DJI devices (e.g. DJI Zenmuse Z15 gimbals, DJI Intelligent Landing Gear) or
SDK devices.
Port Diagram
1
2
3
5
4
6
13
7
8
9
10
12
11
Flight Controller
1. PMU Port
Derives power from the PMU module.
2. LED Port
Communicates with the LED module.
3. M1-M8 Pins
Connects to the corresponding ESC PWM
port for each motor.
4. iESC Port
Communicates with the DJI Smart ESC
using the Smart ESC Communication
Cable.
5. RF Port
Communicates with the DJI Lightbridge 2
Air System.
6. Status Indicator
Indicates the status of the flight controller.
7. CAN2 Port
CAN Bus port (Reserved port).
8. S-Bus Port
Communicates with a DJI DR16 or S-Bus
receiver.
9. F1-F4 Pins
Multifunction PWM output ports.
10. F5-F8 Pins
Multifunction PWM I / O ports.
11. API Port
Communicates with an Onboard SDK
device.
12. EXP Port
Extended port (Communicates with the A3
upgrade kit).
13. Orientation Arrow
The flight controller orientation arrow.
© 2016 DJI All Rights Reserved.
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N3 User Manual
GNSS-Compass Module
The GNSS-Compass module has a built-in GPS/GLONASS and compass. The compass is used
for geomagnetic field measurements. Compass calibration is required before use. DO NOT use or
store the compass in environments with ferromagnetic materials.
1. Orientation Arrow
The GNSS-Compass module should
be mounted with the arrow pointing
toward the aircraft nose.
2. GNSS-Compass Status Indicator
Indicates the status of the GNSSCompass Module.
3. Extended CAN1 Port
Dedicated DJI CAN-Bus port. Communicates with a DJI device.
1
3
2
PMU Module
Supported the DJI Intelligent Flight Battery, with built-in PMU providing power for the whole Flight
Control System and low voltage protection function.
1. iBAT
Communicates with DJI Intelligent Flight
1
Battery.
2
2. Power Status Indicator
Indicates the power status of the flight
3
control system.
3. 3S-12S
Derives power from DJI Intelligent Flight Battery or other LiPo battery.
4. Power Port (9V 2A)
Connected to the Flight Controller for power supply.
5. CAN1 Port
Connected to the GNSS-Compass module.
6 © 2016 DJI All Rights Reserved.
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N3 User Manual
LED Module
The LED Module has an integrated LED Indicator and Micro USB port.
A. The LED is mainly for flight control system status indication during flight (e.g. Flight Mode).
B. In addition, there is a Micro USB port for firmware upgrades via DJI Assistant 2.
1. Flight Status Indicator
Indicates the status of the flight control
system.
2. Micro USB Port
Used to configure and upgrade the N3 via DJI
Assistant 2.
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1
2
Installation
Overview
Installation Procedure
Read this section carefully and follow the procedures below to install your flight control system,
otherwise the flight control system may not normally work.
1 Ensure all parts are in good condition.
2 Watch video tutorials (http://www.dji.com/n3):
Watch the installation and connection video tutorials for an overview of the installation
process. Then mount the parts to your airframe and connect them properly.
Watch the DJI Assistant 2 video tutorial for a brief introduction on how to configure the
parameters. Then launch the DJI Assistant 2 and configure the parameters.
3 Ensure the motor, remote controller channels and Failsafe settings are correct.
4 Ensure the devices connected to the flight controller are working normally and correctly set in
DJI Assistant 2.
© 2016 DJI All Rights Reserved.
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N3 User Manual
The following diagram shows a completed installation for the S900 (with the A3 Upgrade Kit.).
Preparation
Equipment
Ensure you have a suitable airframe, remote controller system, ESCs and battery to use with the
N3. You can also prepare optional equipment, e.g. DJI Intelligent Landing Gear, DJI Zenmuse Z15
series gimbals, and DJI Guidance. Below is a list of compatible equipment.
A. Airframes
The following airframes are supported. Choose an airframe and assemble it properly.
Remember to select the corresponding airframe type in DJI Assistant 2 after assembling the
airframe and connecting the cables.
8 I4
X4
IY6
Y6
I6
V6
V8
I8
X8
IX8
© 2016 DJI All Rights Reserved.
N3 User Manual
The arrow directions in the above diagram indicate the rotation direction of the motor/
propeller. Dark colored arm (s) indicate the direction of the aircraft’s nose.
For coaxial propellers, dark colored propellers are at the top and gray colored propellers
are at the bottom. Otherwise, all propellers are at the top.
B. Remote Controller System
The following remote controller systems are supported. Whatever type of receiver is used,
please make sure that the receiver and remote controller are linked properly before use. Be
sure to link the receiver and remote controller according by following all the procedures in
the remote controller and receiver user manual, and according to the configurations in DJI
Assistant 2.
DJI Lightbridge 2
DJI Lightbridge 2 lets you use DJI GO to configure the flight control system parameters and
utilize Intelligent Flight Modes.
DR16
The DR16 receiver does not support the Point of Interest (POI) and Waypoint flight modes in
DJI GO app.
S-Bus
The S-BUS receiver does not support the Point of Interest (POI) and Waypoint flight modes
DJI GO app.
There is no need to enable the Failsafe function on the remote controller. Once the
receiver loses signal from the remote controller, the controller unit will enter Failsafe
mode automatically, and the aircraft will hover or return-to-home & land according to the
Failsafe configurations in DJI Assistant 2.
C. Propulsion System
ESC
ESC output should be 400Hz. DJI Propulsion systems are recommended.
The iESC port can connect to the DJI Smart ESC Communication Cable if using the DJI
Intelligent ESC.
Propeller and Motor
It is required to use with Propeller and Motor of more than 2400rpm.
D. Battery
Both the 3S-12S LiPo battery and the DJI Intelligent Flight Battery are supported.
The DJI Intelligent Flight Battery provides voltage, battery level and battery cell information, as
well as low battery level protection.
If using a LiPo battery, only the voltage information and low voltage protection are available.
© 2016 DJI All Rights Reserved.
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N3 User Manual
The S900 and DJI Lightbridge 2 are recommended for the N3 series, and are used as
examples in this manual.
DJI S900
DJI Lightbridge 2
Preparing DJI Assistant 2
Download DJI Assistant 2
DJI Assistant 2 is used to configure the flight control system.
http://www.dji.com/n3/info#downloads
Supports Windows 7 (or later) or Mac OS X 10.9 (or later).
Installing DJI Assistant 2
DJI Assistant 2 will guide you through setting the Flight Control System’s parameters. Carefully
follow the on-screen prompts to configure the Flight Control System.
Installing and Running on Windows
Supports Windows 7, Windows 8, Windows 10 (32 or 64 bit).
1. Connect the Micro USB port on the LED module to a PC via a Micro USB cable.
2. Run the software assistant installer and follow the prompts to finish installation.
3. Double click the software assistant icon on your Windows desktop to launch the software.
Installing and Running on Mac OS X
Supports Mac OS X 10.9 (or later).
1. Run the DMG installer and follow the prompts to finish installation.
2. If using Launchpad to run DJI Assistant 2 for the first time, Launchpad will not allow access
because the software has not been reviewed by the Mac App Store.
3.Locate the DJI Assistant 2 icon in the Finder, press the Control key and then click the DJI
Assistant 2 icon (or right-click the DJI Assistant 2 icon using a mouse). Choose Open from the
shortcut menu, click Open in the dialog box and the software will launch.
4. After the first successful launch, direct launching of the software can be achieved by doubleclicking the DJI Assistant 2 icon in the Finder or using Launchpad.
10 © 2016 DJI All Rights Reserved.
N3 User Manual
DJI Assistant 2 works exactly the same way on Mac OS X and Windows. The DJI
Assistant 2 screenshots that appear in this manual are taken from the Windows version.
Start the Installation
Important: Strictly follow the provided guidelines. Failure to do so may lead to unexpected
flight behavior or serious accidents.
Flight Controller System Installation
Mounting the Flight Controller
Mount the Flight Controller with the Orientation Arrow pointing to the front, back, left or right.
Make sure the module is parallel to the aircraft and then fix it onto the aircraft with double-faced
adhesive tape. Configure the parameters in DJI Assistant 2 and select the direction in which you
mounted the Flight Controller. We recommend mounting the Flight Controller with the Orientation
Arrow pointing forward.
Built-in IMU
The top side should be facing up. DO NOT mount upside-down.
Remember to warm up the battery if operating in cold weather.
Mount the flight controller at a low vibration position. The sides of the flight controller
should be precisely parallel to the aircraft body. Based on our experience, there is less
vibration near the aircraft’s center of gravity.
The flight controller is NOT water-proof or oil-proof.
Check the double-faced adhesive tape regularly to ensure the IMU is fixed firmly in
place.
© 2016 DJI All Rights Reserved.
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N3 User Manual
Mounting the GNSS-Compass Module
Follow the procedures below to mount the GNSS-Compass bracket and the GNSS-Compass
module. The GNSS-Compass module included in the Upgrade kits is the same as the one in the
N3 package.
1. Use the M2.0×4 screws to assemble the GNSS-Compass bracket with the Ball End Hex Key
assistant. The longest one is recommended.
2. With the M2.5×7 screws and M2.5×3.4 nuts, mount the bracket on the aircraft.
3. Ensure the GNSS-Compass arrow is pointing to the aircraft nose and then fix it onto the top of
the GNSS-Compass bracket. Try to keep it parallel to the aircraft.
Usage Requirements
1. The DJI logo should be facing the sky, with the orientation arrow pointing directly to the nose
direction; otherwise you may experience take off failure.
2. Fly the aircraft in an open space without buildings or trees; otherwise the GPS satellite number may
be affected.
3. The compass is sensitive to magnetic interference. Always keep the compass module away
from magnetic fields. Otherwise, the compass module may become damaged and lead the
aircraft to work abnormally or even lose control.
4. Select a bracket of appropriate length for you aircraft to avoid interference with the compass.
The length is based on the airframe type and the mounting position and so on. Ensure that
there will not any compass warning when the aircraft is flying with maximum load and can
normally fly.
12 © 2016 DJI All Rights Reserved.
N3 User Manual
Mounting the LED Module
Mount the LED module in a position to ensure it remains visible during flight. The LED bracket
included can be used to fix the LED module onto the aircraft.
Mounting the PUM Module
Mount the PMU module to an unobstructed position on the bottom of the aircraft’s upper plate for heat
dissipation.
PMU
© 2016 DJI All Rights Reserved.
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N3 User Manual
Flight Controller System Connection
Follow the below diagram to connect the flight control system, and use the cable ties to tidy the
cables.
LED
The flight control system’s shell is connected to the whole system’s ground.
Connecting to the Airframe and its Equipment
Ensure you have a suitable airframe, remote controller system, ESCs and battery to use with the
N3 series. Strictly follow the provided guidelines. Failure to do so may lead to unexpected flight
behavior or serious accidents.
Connecting to a Receiver
Select the RF port or the S-Bus port for different types of receivers.
DJI Lightbridge 2
Connect the DJI Lightbridge 2 receiver DBUS port to the Flight Controller RF Port with N3 RF
Cable.
RF Cable
14 © 2016 DJI All Rights Reserved.
N3 User Manual
DR16 Receiver
Connect the DR16 receiver DBUS port to the Flight Controller S-Bus Port with a servo cable.
S-BUS Receiver
Connect the S-BUS receiver to the Flight Controller S-Bus Port with a servo cable.
S- Bus Receiver
Connecting to the ESCs
S900 Connection Diagram
1. Connect the M1-M6 ports on the bottom board of the S900 to the M1-M6 ports on the Flight
Controller in order.
2. The iESC port can connect to the DJI Smart ESC Communication Cable if using the DJI
Intelligent ESC.
G
B
A
P01603.01
© 2016 DJI All Rights Reserved.
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N3 User Manual
Other Airframe Type Connection Diagram
Connect the ESC ports to the ESC ports on the Flight Controller. The diagram below
uses type V6 for example.
Connecting to a Battery
Connect the PMU to the Flight Controller PMU port, and then connect the battery to the PMU.
Note that it can be the central board for some DJI product, e.g. DJI M600.
3S- 12S
Ensure the 3S battery voltage is higher than 11.1V, as low battery level may effect the
battery life and decrease the PMU stability.
Connect to Other DJI Devices
The N3 and N3 Pro are compatible with almost all DJI devices. Connect these optional devices to
the flight controller to achieve more functions It is required to supply power for other devices as
the F channel not supply power..
Intelligent Landing Gear
The N3 series supports the DJI Intelligent Landing Gear, which can be configured in DJI Assistant 2.
You can use a switch to raise or lower the Intelligent Landing Gear.
Mounting and Cable Connection
Ensure the battery is powered off before connection. Connect the Intelligent Landing Gear to the
flight controller’s F1 port, and then configure the settings in DJI Assistant -> DJI Device -> Gear
page.
16 © 2016 DJI All Rights Reserved.
N3 User Manual
Usage
When enabled, the Intelligent Landing Gear is lowered to the ground by default or in emergency
situations (e.g. motor failure tolerance, auto landing). You can use a switch to raise or lower the
Intelligent Landing Gear when the aircraft’s flying altitude is above 5m.
Important for DJI Assistant Settings
1. Be sure to enable and configure the Intelligent Landing Gear function in DJI Assistant first, and
then connect the gear to the F1 port.
2. The Gear channel is required to be mapped to a channel on the receiver if the Intelligent Landing
Gear function is enabled in DJI Assistant. Use the F1 port for landing gear output signals.
3.Unlock the landing gear in the Assistant 2 or app if landing gear folding and unfolding test is
required.
Zenmuse Z15 Gimbal
The N3 and N3 Pro support the DJI Zenmuse Gimbal which can be enabled in DJI Assistant,
providing gimbal rotation control during flight.
Mounting and Cable Connection
Ensure the battery is powered off before connection. Connect the gimbal to the flight controller’s
CAN1 port, If used with the DJI Lightbridge 2, no setting requirement. If used with other remote
controller, configure the settings in the Zenmuse Z15 Assistant.
Pitch
CAN1
LED
Usage
If used with the DJI Lightbridge 2, you can control the gimbal using the gimbal dial on the remote
controller.
If you are not using a DJI remote controller, you will not be able to use the gimbal dial to control
the gimbal.
© 2016 DJI All Rights Reserved.
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N3 User Manual
API Devices
The API port provides support for the Onboard SDK. A Dupont cable will need to be purchased
separately for connecting API devices. Be sure to connect the API port according to the pin
descriptions below, and then configure the serial baud rate in DJI Assistant > SDK.
2 34
API Pin Descriptions
1. Power pin: Supply voltage of 9 V and power consumption of 9 W. If the API device does not
satisfy the above voltage and consumption requirements, provide an alternate power supply.
2. GND pin: Connects to the API device’s GND (ground) pin.
3. UART-TXD pin: Serial signal pin with voltage level of 3.3 V, should be connected to the API
device’s RXD pin.
4. UART-RXD pin: Serial signal pin with voltage level of 3.3 V, should be connected to the API
device’s TXD pin.
Parameter Configuration
Watch the video tutorial for a brief introduction on how to configure the parameters. Then launch
DJI Assistant 2 and follow the prompts to complete configuration.
DJI
Assistant 2
1 Ensure the flight control system is properly powered on.
2 Connect the Micro USB port on the LED module to a PC via a Micro USB cable.
3 Run DJI Assistant 2. Note that you may be asked to register for first time use.
4 Follow the prompts to upgrade the firmware to the latest version.
5 Select the airframe type.
18 © 2016 DJI All Rights Reserved.
N3 User Manual
6 Configure the Flight Controller, IMU and GNSS-Compass mounting parameters.
7 Select the receiver type and configure the channel mapping.
8 Make sure the motors are rotating in correct direction. If not, change the rotating direction.
9 Configure the function channels.
10
Fly in the simulator to check that all functions is working normally.
Ensure to connect all modules before power on.
Ensure to power cycle the battery after firmware upgrade.
N3 Functions
Compass Calibration
Ensure the compass is calibrated before every flight. Failure to calibrate may lead to poor flight
performance or a crash.
1. DO NOT attempt to calibrate your compass where there is a chance of strong magnetic
interference. This includes areas where there are massive metal objects, parking structures, steel
reinforcements underground, or under bridges.
2. DO NOT carry ferromagnetic materials with you during calibration, such as keys or mobile
phones.
3. The compass should always be calibrated when moving from indoor spaces to outdoor spaces.
4. After successful calibration, the compass may become abnormal when you place the aircraft on
the ground. This may be because of underground magnetic interference. Move the aircraft to
another location and try again.
Calibration Procedures
Choose an open space to carry out the following procedures.
Using the remote controller (Lightbridge 2 is used here as an example):
1. Quickly flip the control mode switch from P mode to A mode, and then back to P mode three
times, and the Aircraft Status Indicator will display a solid yellow light. Flip the control mode
switch between position-1 and position-3 when using the third party remote controllers.
2. Hold and rotate the aircraft horizontally 360 degrees, and the Aircraft Status Indicator will
display a solid green light.
3. Hold the aircraft vertically with nose pointing downward, and rotate it 360 degrees around the
center axis. Recalibrate the compass if the Aircraft Status Indicator is solid red.
© 2016 DJI All Rights Reserved.
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N3 User Manual
Using DJI GO (Lightbridge 2 is required):
Tap the Aircraft Status Indicator bar in the DJI GO app and select “Calibrate”, then follow the onscreen instructions.
If the Aircraft Status Indicator blinks red and yellow after the calibration, move your
aircraft to a different location to carry out compass calibration.
Calibrate the compass before each flight. Launch DJI GO App, follow the on-screen
instructions to calibrate the compass.
When to Recalibrate
1. When compass data is abnormal, and the Aircraft Status Indicator is
blinking red and yellow.
2. When flying in a new location, or a location that is different from your last
flight.
3. When the mechanical structure of the N3 has changed, i.e. the mounting
position of the compass has changed.
4. When severe drifting occurs in flight, i.e. the N3 does not fly in a straight line.
Flight Functions
Flight Modes
P-mode is preferred for most flying scenarios. Users can switch to Atti mode where and when
P-mode is unavailable. Be aware that some features are NOT available in Atti mode, and take
EXTRA caution when flying in Atti mode.
1. P-mode (Positioning): P-mode works best when the GNSS signal is strong. There are three
different states of P-mode, which will be automatically selected by the flight control system
depending on GNSS signal strength and Vision Positioning sensors:
a. P-GPS: GNSS and Vision Positioning are both available, and the aircraft is using GNSS for
positioning.
b. P-OPTI*: If GNSS is NOT available, the aircraft will use the Vision Positioning System to hover
accurately.
c. P-ATTI: When neither GNSS nor Vision Positioning is available, the aircraft is using only its
barometer for positioning, so only altitude is controlled.
2. Atti mode (Attitude): The GNSS and Vision Positioning System are NOT used for positioning.
The aircraft only uses its barometer to maintain altitude. If it is still receiving a GNSS signal, the
aircraft can automatically return home if the Remote Controller signal is lost and if the Home
Point has been recorded successfully.
3. S-mode (Sports): S-mode is identical to P-mode in terms of flight controller settings, except that
the handling gain values of the aircraft are adjusted in order to enhance the maneuverability of
the aircraft. The maximum flight speed of the aircraft is increased in this mode.
4. Manual mode: Only use it in emergency situations.
20 © 2016 DJI All Rights Reserved.
N3 User Manual
P-OPTI mode is only available when a DJI Vision Positioning System is used.
Once the GNSS signal is recovered, or the Vision Positioning System available, the
Flight Control System can re-enter P-GPS mode or P-OPTI mode.
M mode (Manual) should be enabled and set in DJI Assistant.
Aircraft Status Indicator Description
Normal
Green Flashes Slowly
×2
Safe to Fly (P-mode with GNSS and Vision Positioning)
Green Flashes Twice Safe to Fly (P-mode with Vision Positioning but without GNSS)
Yellow Flashes Slowly
Safe to Fly (A mode but No GNSS and Vision Positioning)
Flight Control
Manual Take-off
Start the motors by pulling both control sticks to the bottom inside (or outside) corners.
Release the sticks once the motors start. Slowly push the left stick (throttle stick) up to takeoff.
OR
Remote Controller Operation
Here are the default flight controls (Mode 2). The left stick controls altitude and rotation, while the
right stick controls the forward, backward, left or right movements. The gimbal dial controls the
camera’s tilt.
Left Stick
Right Stick
UP
Forward
Ba
Left
ck w ard
Right
Turn Right
Turn Left
Down
You can customize or change these controls through the DJI GO app.
© 2016 DJI All Rights Reserved.
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N3 User Manual
Manual Landing
Use the below method to stop the motors:
When the aircraft has landed, push the throttle down and hold. The motors
will stop after 3 seconds.
You can use the below method to stop the motors in the event of an emergency.
When the aircraft has landed, push the throttle down, then perform the CSC (Control Stick
Combination). The motors will stop immediately. Release both sticks once the motors have
stopped.
OR
Intelligent Flight Modes (using the Remote Controller)
Intelligent Flight Modes make it easier to operate the aircraft. If you are not using a Lightbridge 2
remote controller, you will need to configure a 3-position switch on the remote controller as the
Intelligent Flight Modes Switch, with each switch position corresponding to one of the following
modes: Off, Course Lock, or Home Lock.
Course Lock
Use Course Lock to lock the current nose direction as the aircraft’s forward direction. The aircraft
will move in the locked direction regardless of its orientation (yaw angle).
Requirements: Compass must be working properly.
How to operate: 1. Fly the aircraft in the direction you wish to lock; 2. Toggle the Intelligent Flight
Modes Switch to the Course Lock position to lock the current nose direction as the aircraft’s
forward direction.
How to reset the parameters: Aircraft nose orientation cannot be reset during flight.
How to stop or exit the flight mode: Toggle the Intelligent Flight Modes Switch to the Off position.
Home Lock
Pull the pitch stick backward to move the aircraft toward its recorded Home Point.
Requirements: Home point recorded; P-GPS mode enabled; distance between the aircraft and
Home Point is greater than 5 meters.
How to operate:
1. Fly the aircraft to the target position;
2. Toggle the Intelligent Flight Modes Switch from the Off position to the Home Lock position for
more than three times to record the Home Point (Note: the Intelligent Flight Modes Switch
should stop at the Off position);
22 © 2016 DJI All Rights Reserved.
N3 User Manual
3. Flip the Intelligent Flight Modes Switch to the Home Lock position to start the flight.
How to reset the parameter: Parameters cannot be reset during flight.
How to stop or exit the flight mode: Toggle the Intelligent Flight Modes Switch to the Off position.
Lightbridge 2 not only allows you use the DJI GO app to operate the aircraft, but also
use Intelligent Flight Modes, such as Course Lock, Home Lock, Point of Interest (POI)
and Waypoints, to capture professional shots during flight.
Protection Functions
Return to Home
Return to Home (RTH) brings the aircraft back to the last recorded Home Point. There are three
cases that will trigger the RTH procedure; they are Failsafe RTH, Smart RTH and Low Battery
RTH with the DJI Intelligent Battery (Low Voltage RTH with a LiPo battery).
Failsafe RTH
Failsafe RTH is activated automatically if the remote controller signal (including video relay signal if
DJI Lightbridge 2 used) is lost for more than 3 seconds, provided that the Home Point has been
successfully recorded and the compass is working normally. The RTH process may be interrupted
and the operator can regain control over the aircraft if a remote controller signal is resumed.
1 Record Home Point (HP)
2 Confirm Home Point
3 Remote Controller Signal Lost
Flashing Green
Flashing Green
Flashing Yellow Rapidly
4 Signal Lost Lasts 3secs.
5 Go Home(20m can be set)
6 Landing after Hovering 15secs
Height over HP>20m
20m
Elevate to 20m
Height over HP<=20m
Flashing Yellow Rapidly
Flashing Yellow Rapidly
Flashing Yellow Rapidly
The aircraft automatically descends and lands if RTH is triggered when the aircraft flies
within a 65-foot (20-meter) radius of the Home Point.
The aircraft cannot return to home if the LED is slowly blinking yellow or the GNSS does
not work.
The aircraft cannot avoid obstacles during Failsafe RTH. Therefore it is important to
set a reasonable Failsafe altitude before each flight. Launch the DJI GO app and enter
“Camera” view and select “MODE” to set the Failsafe altitude.
The aircraft will stop ascending and immediately return to the Home Point if you move
the throttle stick when the aircraft reaches an altitude of 20 m or above during Failsafe.
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N3 User Manual
Smart RTH
Use the RTH button on the remote controller when GNSS is available to enable Smart RTH.
During the Smart RTH procedure, the aircraft returns to the last recorded Home Point but you
may control the aircraft's orientation to avoid collisions. Press the Smart RTH button once to start
the process. Press the Smart RTH button again to exit Smart RTH and regain the control.
If using the DJI Lightbridge 2, no additional settings are required for the RTH button.
If using another type of remote controller, you must configure the RTH button in DJI
Assistant 2.
Low Battery RTH with DJI Intelligent Battery
The low battery level failsafe is triggered when the DJI Intelligent Flight Battery is depleted to a
point that may affect the safe return of the aircraft. Users are advised to return home or land the
aircraft immediately when these warnings are shown. Aircraft will automatically return to the Home
Point if no action is taken after 10 seconds countdown. Cancel the RTH procedure by pressing
once on the RTH button. The thresholds for these warnings are automatically determined based
on the current aircraft altitude and its distance from the Home Point.
Aircraft will land automatically only if the current battery level can support the aircraft in landing on
the ground from the current altitude. Use the remote controller to control the aircraft’s orientation
during the landing process.
When the critical battery level warning activates and the aircraft is descending to land
automatically, you may push the throttle upward to hover the aircraft and navigate it to a
more appropriate location for landing.
Color zones and markers on the battery level indicator reflect estimated remaining flight
times and are adjusted automatically, according to the aircraft’s current status. (Shown
in app when using the Lightbridge 2)
Low Battery RTH with LiPo battery
With LiPo battery, the Low Voltage RTH will be triggered when the LiPo battery is depleted to a
point that may affect the safe return of the aircraft.
Attitude Control When One Motor Output Fails
For hexa-rotor and quad-rotor, the N3 flight control system can control the aircraft’s attitude when
one motor fails:
1. During flight, the aircraft with N3 flight control system is attitude controllable when one motor
output fails
2. The motor will not start before take-off. (DJI Intelligent ESCs are required for communication.)
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N3 User Manual
Select Course Lock or Home Lock mode to fly the aircraft to a safe area to land when the aircraft
is far away, or the attitude can’t be recognized.
Propulsion System Protection
Low battery and overweight aircraft warnings are provided in the DJI GO app.
Flight Limits and Flight Restriction Areas
Flight limits on height and distance can be set. The details of these flight limits are described in
the following section.
All unmanned aerial vehicle (UAV) operators should abide by all regulations from such
organizations as the ICAO (International Civil Aviation Organization), FAA and their own national
airspace regulations. For safety reasons, the flight limits function is enabled by default to help
users use this product safely and legally. The flight limits function includes height limits, distance
limits and No Fly Zones. When operating in P Mode, height, distance limits and No Fly Zones
work together to manage flight. In A mode only height limits work and flights cannot go higher
than 120 meters* (can be set up to 500 meters in the Assistant or DJI GO app).
*It is 50 meters if the GNSS Level does not reach 3-level (or above) during flight.
Max Height & Radius Limits
Max Height & Radius limit flying height and distance. Once complete, your aircraft will fly in a
restricted cylinder that is determined by these settings. The tables below show the details of
these limits.
Max Radius
Maximum Flight Altitude
Home Point
Height of aircraft
when turned on
GNSS Signal Strong
Slowly Blinking Green
Flight Limits
DJI GO app
Maximum Flight
Aircraft's altitude cannot
Warning: Height
Altitude
exceed the specified value.
limit reached.
Flight distance must be
Warning: Distance
within the max radius.
limit reached.
Max Radius
Aircraft Status Indicator
None.
None.
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N3 User Manual
GNSS Signal Weak
Maximum
Flight
Altitude
Max
Slowly Blinking Yellow
Flight Limits
DJI GO app
Height is restricted to 400
Warning: Height limit
feet. (120m) and under.
reached.
Aircraft Status Indicator
None.
No limits
Radius
If the aircraft flies out of the limit, you can still control the aircraft, but you cannot fly it
any farther.
If the aircraft flies out of the max radius it will fly back within range automatically when
GNSS signal is strong.
No-Fly Zones
All No-Fly Zones are listed on the DJI official website at http://www.dji.com/flysafe/no-fly. NoFly Zones are divided into Airports and Restricted Areas. Airports include major airports and
flying fields where manned aircraft operate at low altitudes. Restricted Areas include border lines
between countries or sensitive institute. The details of the No-Fly Zones are explained as follow:
Airport
(1) Airport No-Fly Zone are comprised of Take-off Restricted zones and Restricted Altitude Zones.
Each zone features circles of various sizes.
(2) R1 miles (value of the R1 depends on the size and shape of the airport) around the airport is a
Take-off restricted zone, inside of which take off is prevented.
(3) From R1 mile to R1 + 1 mile around the airport the flight altitude is limited to a 15 degree
inclination.Starting at 65 feet (20 meters) from the edge of airport and radiating outward. The
flight altitude is limited to 1640 feet (500 meters) at R1+1 mile
(4) When the aircraft enters within 320 feet (100 meters) of No-Fly Zones, a warning message will
appear on the DJI GO app.
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N3 User Manual
1640
feet
66 feet
1 mile
R1
R2
320 feet
1640
feet
66 feet
1 mile
320 feet
R1
R2
Restricted Area
(1) Restricted Areas does not have flight altitude restrictions.
(2) R miles around the designated restriction area is a Take-off Restricted area. Aircraft cannot
take off within this zone. The value of R varies based on the definition of the restricted areas.
(3)A “warning zone” has been set around the Restricted Area. When the aircraft approaches
within 0.062 miles (100 m) of this zone, a warning message will appear on the DJI GO app.
100 m
100m
R
R
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N3 User Manual
GNSS Signal Strong Zone
Blinking Green
Restriction
DJI GO app Prompt
Aircraft Status
Indicator
Wa r n i n g : Yo u a re i n a
Motors will not start.
N o - f l y z o n e . Ta k e o f f
prohibited.
No-fly Zone
If the aircraft enters the
restricted area in A-mode,
but is switched to P-mode,
the aircraft will automatically
descend, land, and stop its
Warning: You are in a nofly zone. Automatic landing
has begun.
motors.
R1: Warning: You are
in a restricted zone.
If the aircraft enters the
Descending to safe
Restricted-
restricted area in A-mode, but
altitude.
altitude flight
is switched to P-mode, it will
R2: Warning: You are in a
descend to an appropriate
restricted zone. Maximum
altitude and hover 15 feet
flight altitude is restricted
below the altitude limit.
to between 20m and
zone
Red flashing
500m. Fly cautiously.
Warning zone
No flight restriction applies,
but there will be a warning .
Free zone
No restrictions.
Warning: You are
approaching a restricted
zone, Fly cautiously.
None.
None.
Semi-automatic descent: All stick commands are available except the left stick command
during the descent and landing process. Motors will stop automatically after landing.
When flying in a safety zone, the aircraft's status indicator will blink red rapidly and
continue for 3 seconds, then switch to indicate current flying status and continue for 5
seconds at which point it will switch back to blinking red.
For safety reasons, please do not fly close to airports, highways, railway stations, railway
lines, city centers, or other sensitive areas. Fly the aircraft only within your line of sight.
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N3 User Manual
Using with DJI GO app
Intelligent Flight Modes are available in the DJI GO app when using the DJI Lightbridge 2.
Download the DJI GO App
Search “DJI GO” on the App Store or Google Play and download the app to
your mobile device.
For the best user experience, please use mobile devices with iOS 8.0 (or higher) and Android 4.1.2
(or higher).
Beginner Mode
The N3 will enter Beginner Mode the first time you use the DJI GO app, which can be canceled
on the “MODE” page. In Beginner Mode, the Max Height and Max Distance are restricted to 30
meters.
Auto Take-off
Use auto take-off to take off your aircraft automatically if the Aircraft Status Indicator is blinking
green. Follow the steps below to use auto take-off:
1. Launch DJI GO app, enter “Camera” view.
2. Ensure the aircraft is in “P” mode.
3. Go through the pre-flight checklist.
4. Tap“
”, and confirm flight conditions. Slide to confirm and take-off.
5. Aircraft takes off and hovers at 1.2 meters above ground.
Auto-Landing
Use auto-landing to land your aircraft automatically if the Aircraft Status Indicator is blinking green.
Follow the steps below to use auto-landing:
1. Ensure the aircraft is in “P” mode.
2. Check the landing area condition before tapping “
”, to perform landing.
3. Aircraft lowers the landing gear and proceed to land automatically.
Updating the Home Point
There are two ways for updating the Home Point.
1. Update the Home Point via DJI GO app when using with Lightbridge 2.
2. Quickly flip the F-switch more than three times to update the Home Point when using a nonDJI receiver.
The aircraft status indicator blinks green to show Home Point is set successfully.
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N3 User Manual
Return to Home
Smart RTH, Low Battery RTH and Failsafe RTH are also available in the DJI GO app.
Smart RTH
Press the Return-To-Home button to bring the aircraft back to the Home Point. Tap again to stop
the procedure.
Low Battery RTH*
The low battery level* failsafe is triggered when the DJI Intelligent Flight Battery is depleted to
a point that may affect the safe return of the aircraft. Users are advised to return home or land
the aircraft immediately when these warnings are shown. DJI GO will advise users to return the
aircraft to the Home Point when the low battery warning is triggered. Aircraft will automatically
return to the Home Point if no action is taken after a 10-second countdown. Cancel the RTH
by pressing once on the RTH button. The thresholds for these warnings are automatically
determined based on the current aircraft altitude and its distance from the Home Point.
Aircraft will land automatically if the current battery level can only support the aircraft to land to
the ground from the current altitude. Use the remote controller to control the aircraft’s orientation
during the landing process.
When the critical battery level warning activates and the aircraft is descending to land
automatically, you may push the throttle upward to hover the aircraft and navigate it to a
more appropriate location for landing.
Color zones and markers on the battery level indicator reflect estimated remaining flight
time and are adjusted automatically, according to the aircraft’s current status.
* The low voltage failsafe is triggered if using a normal LiPo battery.
Failsafe RTH
The aircraft will not avoid obstacles while it is returning to the Home Point, and an appropriate
RTH altitude MUST be set before flight. Launch the DJI GO app and enter Camera view and
select “MODE” to set the Failsafe altitude. You should also use the control sticks to guide the
aircraft. Refer to the Safety Guidelines and Disclaimer for more details.
Intelligent Flight Modes (in DJI GO app)
Course Lock
Lock the current nose direction as the aircraft’s forward direction. The aircraft will move in the
locked directions regardless of its orientation (yaw angle).
Conditions of Use: Compass is working normally.
How to operate: Control the aircraft nose orientation-> Tap the Course Lock icon to start the
Course Lock flight.
30 © 2016 DJI All Rights Reserved.
N3 User Manual
How to reset the parameter: Aircraft nose orientation cannot be reset during flight.
How to stop or exit the flight mode: Click the “Exit” button during flight.
Home Lock
Pull the pitch stick backward to move the aircraft toward its recorded Home Point.
Conditions of Use: Home point recorded; in the P-GPS mode; distance between the aircraft and
home point is larger than 5 meters.
How to operate: Tap the Home Lock icon to start.
How to reset the parameter: None.
How to stop or exit the flight mode: Click the “Exit” button during flight.
POI (point of interest)
The aircraft will orbit around the subject automatically to allow the operator can be more focus on
framing their shoot on the subject in Point of Interest.
Conditions of Use: in the P-GPS mode; distance between the aircraft and interest point is larger
than 5 meters and smaller than 10 meters.
How to operate: Set the interest point -> Operate the aircraft to set the distance and the flight
velocity -> Tap the POI icon to start the flight.
How to reset the parameter: The distance and the flight velocity can be changed during the flight
when you operate the aircraft.
How to stop or exit the flight mode: Click the “Exit” button during flight.
Waypoints
Record a flight path, then the aircraft will fly along the same path repeatedly while you control the
camera and orientation. The flight path can be saved and re-applied in the future.
Conditions of Use: in the P-GPS mode; Distance between the way points is larger than 5 meters
and less than 500 meters; automatically detect the battery level for the smart flight battery (or
voltage for LiPo batteries).
How to operate: Operate the aircraft to the target position and set the aircraft nose orientation ->
Tap to record the waypoints-> Set the Waypoint mode (Consistent with record, Consistent with
route, Free) -> Set the flight velocity and Failsafe option->Save in the App-> Start.
How to reset the parameter: The aircraft orientations are different in each mode. Operate the
aircraft to fly forwards or backwards.
How to stop or exit the flight mode: Click the “Exit” button during flight.
Difference between the three modes:
Free: The aircraft nose can be changed during the waypoint flight.
Consistent with record: Aircraft nose orientation of every waypoint are pre-recorded. And the
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N3 User Manual
aircraft nose will automatically change to the recorded orientation during flight.
Consistent with record: Aircraft nose orientation keep the same as the route direction. The aircraft
nose will automatically change during flight.
If the detected battery level is too low, the aircraft will not enter the Waypoints flight mode.
IOSD
DJI Lightbridge 2 MUST be connected to for the built-in iOSD to work. Most flight information is
displayed on-screen in the DJI GO app.
Information displayed includes battery level/voltage, flight velocity, height, distance from the home
point, horizontal attitude, GPS satellite number, etc. iOSD and video information are superposed
on the receiver, making iOSD data clearly visible and bringing you a more involved flight
experience.
N3 supports DJI iOSD Mark II and iOSD mini.
Used with the A3 Upgrade Kit
With the A3 upgrade kit (IMU Pro and GPS-Compass Pro modules), the N3 provides triple
modular redundancy, improving the system’s anti-risk performance. System status is indicated by
LEDs on the GPS-Compass Pro, IMU Pro and Flight Controller modules.
LED
32 © 2016 DJI All Rights Reserved.
N3 User Manual
LED Indicator
Green
Red
Blue
Status
The module is functioning normally and working as a part of the system
When the LED is blinking green.
The module is functioning abnormally When the LED is blinking red.
The module is functioning normally but not working as a part of the
system When the LED is blinking blue.
SDK
An independent CAN2 port, API Serial port and USB OTG port are provided for SDK support.
The CAN2 port lets you connect SDK devices and support for open protocols enables greater
customization.
Refer to the DJI official website https://developer.dji.com/ for more SDK details.
Flight Control System Checklist
Hardware Checklist
Mounting and components checklist
1. Ensure all parts are mounted correctly and firmly.
2. Ensure the ESCs and receiver are connected correctly and firmly.
LED Status checklist
1. Ensure the mode switch corresponds to the flight status LED.
2. System status LED on the GNSS-Compass and IMU Pro are normal.
3. Ensure all the sensor parameters are correct and the IMUs are calibrated correctly.
DJI Assistant 2 Checklist
DJI Assistant 2 checklist
1. Ensure the aircraft mounting parameters are correct.
2. Ensure the flight controller parameters are correct.
3. Low battery level protection and Failsafe protection are set correctly.
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N3 User Manual
Flight Safety
It is important to understand basic flight guidelines for the safety of both you and those around
you. Refer to the Disclaimer and Safety Guidelines for more information.
Appendix
LED Indicators
Flight Status LED Indicator
LED
Description
Alternatively
×4
Blinking Red, Green and Yellow
Blinking Yellow Four Times
The system is warming up.
Blinking Green Slowly
Safe to fly, GNSS working
Blinking Yellow Slowly
P-ATTI or ATTI mode
×2 Blinking Green Quickly Twice
Blinking Purple Twice
Blinking Blue Rapidly for 1.5 seconds
Blinking Green Rapidly for 1.5 seconds
Blinking Yellow (Alternates with other
flight mode patterns)
Blinking Yellow Rapidly
Blinking Red Slowly
Blinking Red Rapidly
Blinking Red Rapidly for 0.6 second
when performing CSC
—— Solid Red
Blinking Red and Yellow Alternatively
34 The system is running a diagnostic test.
© 2016 DJI All Rights Reserved.
VPS working, no GNSS
Manual mode
Switching devices (IMU or GNSS modules)
for the modular redundancy system
Home Point/POI/Course Orientation is set
successfully
Intelligent Flight Modes
Remote controller signal lost
Low battery warning
Critically low battery warning
Large IMU bias or IMU initialization
Critical error
Compass calibration required
N3 User Manual
GNSS-Compass/A3 IMU Pro/A3 GPS-Compass Pro/IMU Pro/Flight Controller
LED Indicator
LED Indicator
Green
Red
Blue
Status
The module is functioning normally and working as a part of the system
When the LED is blinking green.
The module is functioning abnormally When the LED is blinking red.
The module is functioning normally but not working as a part of the
system When the LED is blinking blue.
Troubleshooting
1. LED Status checklist
Ensure the mode switch corresponds to the flight status LED.
Ensure the system status LEDs on the GNSS-Compass and IMU Pro are normal.
Ensure all the sensor parameters are correct and the IMUs are calibrated correctly.
2. IMU calibration failure.
Ensure the aircraft is not moved during calibration.
Ensure the aircraft is placed level during calibration.
3. Battery detection error.
Connect to DJI Assistant 2 to ensure the battery type is correct.
4. Compass calibration failure.
Restart the battery if compass calibration failed.
Connect to DJI Assistant 2 to ensure the channel mapping of the flight mode switch is correct.
Connect to DJI Assistant 2 to ensure the compass Mod value is normal.
5. Failed to exit the SD card read mode after reading the SD card successfully.
Restart the battery of the aircraft.
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N3 User Manual
Specifications
Built-in Functions
P-mode (Positioning)
Flight Modes
A-mode (Attitude)
S-mode (Sport)
Manual mode
Smart RTH
Return-to-Home Modes
Low battery RTH (for DJI Intelligent Flight Batteries)
Low voltage RTH (for other LiPo batteries)
Failsafe RTH
Failsafe mode
Low battery level warning (only for DJI Intelligent Flight Batteries)
Low battery voltage warning (for other LiPo batteries)
Safety Features
Custom flight altitude and radius limits
No Fly Zones
Motor redundancy (for 6 and 8 rotor platforms)
Motor overload detection
Multi modular redundancy (with the A3 upgrade kit)
Beginner mode
Auto takeoff and landing
Wireless flight controller configuration
DJI GO App
Flight data OSD (built-in data recorder)
Course Lock*
(DJI Lightbridge 2 required)
Intelligent Flight Home Lock*
Modes
Point of Interest (POI)
Waypoints
DJI aerial platforms (e.g. S900, S1000, S1000+)
DJI gimbal systems (e.g. Zenmuse X3 / X5 / X5R/ XT /Z15 A7 /
Supported DJI Equipment
GH4 / 5D Ⅲ / BMPCC)
DJI Intelligent Landing Gear
DJI Intelligent Flight Battery
DJI iOSD Mark II, DJI iOSD mini
*Course Lock and Home Lock work without the DJI Lightbridge 2.
36 © 2016 DJI All Rights Reserved.
N3 User Manual
Peripheral
4-rotor: I4, X4
Supported Airframes
6-rotor: I6, V6, Y6, IY6
8-rotor: X8, I8, V8, IX8
Supported ESC output
400 Hz refresh frequency
DJI Lightbridge 2
Supported Receivers
DJI DR16
S-Bus
Recommended Batteries
Required Operation System
SDK
Onboard SDK Ports
Expansion Ports
DJI Intelligent Flight Battery
3S-12S LiPo battery
Windows 7, 8 or 10 (32 or 64 bit)
Mac OS X 10.9 or later
Mobile SDK
Onboard SDK
API, CAN2*
F1-F4 ports for output
F5-F8 ports for I/O*
*Coming soon.
Electrical & Mechanical
Rated Power
3.3 W
Rated Peak Power
5W
Input Voltage Range
10.5 – 52 V
Static Electricity
Operating Temperature
AD: ±8 kV
CD: ±4 kV
14° to 131° F (-10° to 55° C)
Flight Controller: 46 g
Weight
GNSS-Compass: 37 g
LED Module: 13 g
PMU: 33 g
Flight Controller: 58.1 mm × 39 mm × 17.05 mm
Dimensions
GNSS-Compass: 50 mm (diameter) × 12.2 mm
LED Module: 25 mm × 25 mm × 6.3 mm
PMU: 40 mm × 28.5 mm × 11.2 mm
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N3 User Manual
Optimized Flight Performance (Subject to airframe type and payload, most parameters can
be configured in Assistant 2.)
Hovering Accuracy (In P-Mode)
Vertical: ± 0.5 m
Horizontal: ± 1.5 m
Max Wind Resistance
10 m/s
Max Yaw Angular Velocity
150°/s
Max Pitch Angle
45 (Default 35°)
Max Ascent Velocity
5 m/s
Max Descent Velocity
4 m/s
38 © 2016 DJI All Rights Reserved.
DJI Support
http://www.dji.com/support
This content is subject to change.
Download the latest version from
http://www.dji.com/product/n3
If you have any questions about this document, please contact DJI by
sending a message to [email protected]
© 2016 DJI All Rights Reserved. 
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