Spreading Wings S900

2016.01 

User Manual V1.4
2 © 2016 DJI. All Rights Reserved. 

Disclaimer

Thank you for purchasing the S900. Please visit the Spreading Wings S900 page on www.dji.com regularly 

to keep up to date with product information, technical updates and manual corrections. Information in this 

manual is subject to change without notice. 

In using this product, you hereby agree to this disclaimer and signify that you have understood all points 

completely. When assembling this product, follow all instructions carefully. The manufacturer and seller 

assume no liability for any damage or injury arising from the use of this product.

This is a class A product of the FCC certi cation. In a domestic environment this product may cause radio 

interference, in which case the user may be required to take adequate measures.

DJI is a registered trademark of DJI. Names of product, brand, etc., appearing in this manual are trademarks 

or registered trademarks of their respective owner companies. This product and manual are copyrighted by 

DJI with all rights reserved. No part of this product or manual shall be reproduced in any form without the prior 

written consent or authorization of DJI. 

About

The S900 is designed for professional aerial photography and cinematography. It is user friendly, safe, 

stabilized and easy to fly while its integrated design makes assembly and configuration simple and fast. 

Retractable landing gear, vibration dampers, slightly angled arms and a minimalized gimbal mount allow for 

a clear 360 degree view from the camera. A patented power distribution board, built-in high-speed ESCs 

and motors with high ef ciency propellers ensure dynamic stability and maximized power ef ciency. Used 

with a professional DJI multi-rotor autopilot system, the S900 can hover and  y reliably making it ideal for 

photography and cinematography.

126mm

433mm

305mm
© 2016 DJI. All Rights Reserved. 3

Contents

Disclaimer 2

About 2

Contents 3

Cautions 4

Legend 4

In The Box 5

Mounting the Landing Gear 6

Mounting Frame Arms 7

Mounting Electronics and Wiring 11

Connecting XT60 Ports on the Center Frame 16

Installing Battery 16

Setting Up the Landing Gear 18

Mounting the Gimbal 20

Appendix 22

ESC Sound 22

ESC LED 22

Speci cations 22

Gain Value Settings 23

FAQ 24

Soldering the ESC 24

Remounting the Propellers 24

Propeller Precautions 24

Using the Propeller Holder 25

Assembling Motor Vibration Absorbers 25

Remounting the Landing Gear Servo 26

Recalibrating Servo Travel 26

Part List 27

FCC Statements 31
4 © 2016 DJI. All Rights Reserved. 

Cautions

When  ying, the rotating propellers may cause serious damage and injury. Please  y safe at all times. 

Assembly Cautions

1. Use a bracket to mount the GPS module on the center frame to avoid interference with the power board.

2. Ensure the IMU is mounted with the arrow pointing toward the nose of the aircraft.

3. If using a receiver, attach it under the bottom board of the center frame with the end of the antenna 

facing downwards and away from obstructions to avoid signal loss. 

4. Ensure frame arms are mounted correctly.

 a) Motor mounts with CCW marks should be mounted to the center frame positions with the following 

marks: M1, M3 and M5.

 b) Motor mounts with CW marks should be mounted to the center frame positions with the following 

marks: M2, M4, and M6.

5. Do not remove any glued-in screws.

6. Screws that already have blue glue can be used once without thread locker. On other occasions, apply 

appropriate thread locker  rst.

7. The S900 should be lifted off the ground when testing landing gear or recalibrating servo travel.

Flight Cautions

1. ESCs are not water-proof, please do not  y in rain or snow.

2. Ensure all soft dampers and vibration absorbers are in good condition before every Áight. If not, replace 

immediately. Otherwise, the Áight performance of your aircraft will be adversely affected.

3. Ensure all parts are in good condition before each  ight. Do not  y with worn or broken parts.

4. Ensure propellers and motors are installed correctly and propellers are unfolded before  ying.

5. Ensure ESC signal connectors and power cable connectors are tight before every  ight.

6. When  ying, maintain a safe distance away from people, buildings, high-voltage lines, tall trees, water 

and other hazards.

7. Use only 6S LiPo batteries for the power supply.

8. Ensure all output signals from M1 to M6 are in proper working order when using the DJI A2  ight control 

system to avoid damage or injury. 

9. Do not overload the system.

10. Do not get close to or touch motors or propellers when they are spinning as this can cause serious injury.

11. Disconnect the battery and remove the camera during transportation to avoid damage or injury. 

12. We strongly recommend using as many DJI manufactured parts as possible.

Others

 If you have any problems you cannot resolve, contact your dealer or DJI customer service.

Legend

Important Hints and Tips Cautions
© 2016 DJI. All Rights Reserved. 5

In The Box

Center Frame ×1 Frame Arms ×6

Landing Skid Tubes ×2

(with Silicone Rubber Dampers)

Landing Gear Legs ×2

GPS Collapsible Mount ×1 Springs ×2

Connection Cable Accessories Package ×1

Connector Set ×1

or

3-PIN Connection Cables ×8

CW propellers ×2

CCW propellers ×2

Magic tapes ×4

The red knobs ×6

Landing gear leg rings ×4

Soft dampers ×50

3-PIN Servo Cable ×1 Screw Package ×1

For frame arms mount: M4×35

For landing gear mount: M3×8, 

M2.5×8 (socket cap), M3×22 (socket cap)

Tools Required

Tools Usage

2.0mm Hex Wrench, 2.5mm Hex Wrench Mounting screws.

Thread Locker Fastening screws.

Nylon Cable Tie, Scissors, Cutting Pliers/Dykes Binding devices and wires.

Foam Double Sided Adhesive Tape Mounting receiver, controller and other modules. In The Box
6 © 2016 DJI. All Rights Reserved. 

Mounting the Landing Gear

Instructions

1. Put one landing gear leg ring onto each landing gear leg. 

2. Insert one landing gear leg into each landing skid tube and secure it in place by tightening the M2.5×8 

(socket cap) screw. Ensure silicone rubber dampers are attached to each end.

3. Insert the landing gear leg into connection point on the center frame. Af x in place with M3×8 screws.

4. Connect both springs on the legs to the center frame. 

 Note the springs are 58.5mm before connecting to the center frame, and are stretched to 70mm 

when mounting is completed. 

 It is recommended that the landing gear leg ring be placed about 30mm above the landing skid tube. 70mm

30mm Mounting the Landing Gear M2.5×8 

(socket cap)
© 2016 DJI. All Rights Reserved. 7

Mounting Frame Arms

Instructions

1. Prepare the arms.

(1) Check all propellers for cracks, then install and screw each propeller cover on tightly.

(2) Ensure all motors are mounted  rmly and rotate freely.

(3) Mount all arms with red propeller covers to M1 and M2 to indicate the nose of the S900. 

(4) Identify the CW and CCW marks on the arms. Mount the arms with the CCW mark to the M1, M3 and 

M5 positions of the center frame. The arms with the CW mark should be mounted to the M2, M4 and 

M6 positions of the center frame.

2. Insert each frame arm vertically into the mounting 

area on the center frame. 

3. Line up the screw holes of the frame arm and 

center frame.

4. Insert the M4×35 screw from the right of the 

frame arm (the thread is located on the left of the 

screw mount). Tighten each screw correctly. Over 

tightening may lead to connector abrasion.

Cover Propeller

Screw

Motor

ESC

CW or CCW Mark

LED*

Screw Mount Power Cable

ESC Signal Cable

*LED is on after motor started. Mounting Frame Arms
Spreading Wings S900 User Manual

8 © 2016 DJI. All Rights Reserved. 

5. Gently lift the frame arm.

6. Twist the red knob to lock each arm in place. Be sure there is an audible click, which indicates a proper 

lock. Check the arm for movement. To store, untwist the knob and lower the frame arm.

7. Now unscrew 6 screws (M2.5×8 cheese) on the upper plate of the center frame and remove the upper 

plate. Then unscrew the 4 screws (M3×8 self-tapping, found under the center frame) of the round cover 

and remove it to gain access to the ESC and power cable installation area.

8. Plug each ESC signal cable into the slot near each arm on the center frame. Mounting Frame Arms
Spreading Wings S900 User Manual

© 2016 DJI. All Rights Reserved. 9

9. Connect the power cables to the center frame. Each cable must be screwed into a positive (+) or negative (-) 

gold bracket. Each bracket will have two cables of the same color screwed into it. Red cables are positive 

and black cables are negative.

10. To ensure a reliable connection, rotate the screw until it is both tight and parallel to the connecting 

bracket.

11. Ensure all ESC cables, and power cables are correctly installed onto the center frame. 

ESC cables

power cables Mounting Frame Arms
Spreading Wings S900 User Manual

10 © 2016 DJI. All Rights Reserved. 

12. Replace the round cover of the center plate, and re-tighten the 4 screws (M3×8 self-tapping). Then 

replace the upper plate of the center frame, and re-tighten the 6 screws (M2.5×8 cheese). 

13. Double check all frame arms. Arms M1 and M2 are the forward facing (nose), arms M4 and M5 are the 

tail. Seen from the top, motors on arms M1, M3 and M5 rotate counter clockwise while those on arms M2, 

M4 and M6 rotate clockwise.
© 2016 DJI. All Rights Reserved. 11

Mounting Electronics and Wiring

Eight positions are reserved for mounting a flight control system, wireless video transmission module, 

receiver, and other accessories. The DJI A2  ight control system has been used here as an example. If using 

an A2, follow mounting and wiring instructions found in the A2  ight control system user manual. If using 

the DJI WK-M  ight control system, please refer to the WK-M user manual for connections. Also be sure the 

 rmware on your DJI  ight controller has been updated to the latest version.

Instructions

1. Attach IMU module to the IMU area of the center frame. Ensure that it points toward the nose.

2. Attach the PMU module to the center frame.

Only mount the IMU in the IMU position of the center frame.

3. Mount the  ight controller in the reserved position near the PMU module. Mounting Electronics and Wiring 2 S V S- EN

X1 PW

3V 5V

6S @

2( V 6V) P M U @

A2 Flight Controller CAN1 ANTS2 X1 S1 X2 X3 F1 F2 F3 M F4

1 M2 M3 M4 M5 M6 M7 M8CAN2

LINK LED

CONTROLLER UNIT CAN1 ANTS2 X1 S1 X2X3F1F2F3 M F4

1 M2 M3 M4 M5 M6 M7 M8CAN2

LINK LED

CO NTROLLER UNIT Reserved Position

IMU
Spreading Wings S900 User Manual

12 © 2016 DJI. All Rights Reserved. 

4. Attach the GPS collapsible mount to the center frame using M2.5×8 screws.

5. Mount a GPS module to the GPS mount with a bracket. Ensure the arrow points toward the nose and avoid 

catching your  ngers in the bracket when folding for transportation.

6. The other reserved positions are indicated in the diagram below and can be used for mounting a receiver, 

LED  ight indicator, iOSD module and wireless video transmission module.

M1

M2 Mounting Electronics and Wiring
Spreading Wings S900 User Manual

© 2016 DJI. All Rights Reserved. 13

7. Check that every anti-drop screw has been firmly installed in the reserved positions. Thread locker is 

recommended.

(1) Remove the anti-drop screws to apply appropriate thread locker.

(2) Replace and tighten.

8. Note that the dampers are 30° silicon rubber. If you use other dampers or vibration absorbing balls, the 

quality of your aerial photography may be affected.

 Mount the GPS with a bracket to avoid interference from the center frame power board.

 Use glue to install the GPS bracket. Ensure it is  rm and stable before every  ight.

 Always test motors using the Assistant Software after installation. Refer to your  ight control system 

user manual for details. Mounting Electronics and Wiring

dampers
Spreading Wings S900 User Manual

14 © 2016 DJI. All Rights Reserved. Mounting Electronics and Wiring

Connecting the Áight controller to the center frame 

1. Connect the  ight control system according to your  ight control system user manual.

2. Connect the  ight controller to the center frame with the connection cables. 

There are two kinds of connection cables. Choose the corresponding connection mode according to the 

connection cable in the box. 

Using the connector set: 

Plug in the connector set to the ESC signal outlet on the center frame. Then plug in the connector set to 

 ight controller as shown below. 

(1) Yellow 4-pin cables are for M1~ M4 connections. The yellow cable should be connected to M1.

(2) Brown 4-pin cables are for M5~ M6 connections. The brown cable should be connected to M5.

(3) Black 4-pin cables are for four continuous ground pins connections. M1~M4 are connected as the 

 following diagram shows. M1

2

3

4

5

6 M

M

M

M

M CAN1 ANTS2 X1 S1 X2 X3 F1 F2 F3 M1 F4 M2 M3 M4 M5 M6 M7 M8CAN2

LINK LED

CONTROLLER UNIT

1

brown 2

3 M1 M2 M3 M4 M5

M6

yellow

1

2

3

M1

M2

M3

M4

M5

M6

yellow

brown

the ESC Signal Outlet

the ESC Signal Outlet

A2 Flight Controller

A2 Flight Controller

Using the 3-pin connection cable: 

M1 through M6 correspond to each motor number. CAN1 ANTS2 X1 S1 X2 X3 F1 F2 F3 M F4

1 M2 M3 M4 M5 M6 M7 M8CAN2

LINK LED

CONTROLLER UNIT M1

2

3

4

5

6 M

M

M

M

M

M1

M2

M3

M4

M5

M6

M1 M2 M3 M4 M5 M6 M
Spreading Wings S900 User Manual

© 2016 DJI. All Rights Reserved. 15

If using a DJI WK-M  ight controller, you must use the wires that came with the WK-M. M1 through 

M6 correspond to each motor number. M1

2

3

4

5

6 M

M

M

M

M

M1

M2

M3

M4

M5

M6

WKM Flight Controller the ESC Signal Outlet

 If right and left servo cables are reversed, the landing gear will not function properly.

 Connect all wires carefully and neatly to avoid cable damage caused by frame edges. 

Connecting the Áight controller and landing gear

1. Connect the left servo (between M3 and M4) cable to the “L” port of the landing gear control board.

2. Connect the right servo (between M5 and M6) cable to the “R” port of the landing gear control board.

3. For the A2  ight control system, connect the F1 port of the  ight controller to the “IN” port of the landing 

gear control board. Other  ight control systems connect a 2-position channel receiver to the “IN” port. Mounting Electronics and Wiring

R L IN

Right Servo Connector Left Servo Connector CAN1 ANTS2 X1 S1 X2 X3 F1 F2 F3 M F4

1 M2 M3 M4 M5 M6 M7 M8CAN2

LINK LED

CONTROLLER UNIT R L IN

F1
16 © 2016 DJI. All Rights Reserved. 

Connecting XT60 Ports on the Center Frame

The bottom board is a power distribution board with three XT60 connectors for battery power.

Instructions

1. Connect the PMU power cable to the XT60 connector on top of the bottom board.

2. Connect the landing gear control board cable to the XT60 connector on the bottom of the bottom board.

3. Other connectors can supply power for other DJI devices, as required. 

Installing Battery

Soldering battery connectors

AS150 spark-proof connectors are used. They must be soldered to your battery power cables.

1. Remove the original battery connectors. Avoid cutting the power and ground cables at the same time, as 

this can cause a short circuit. We recommend wrapping unsoldered cables with insulating tape to prevent 

accidental connections. 

2. Pass the black ground wire through the black housing. After passing the wire through, solder the female 

bullet connector to the ground wire. Wait for the soldered connection to cool, then pull the housing back 

over the bullet connector.

3. Screw and pass the red power wire through the red housing. After passing the wire through, solder the 

male bullet connector to the power wire. Wait for the soldered connection to cool, and then screw and pull 

the housing back over the bullet connector. 

Connectors soldering diagram

2S V-SEN

X1 PW3V 5V 6S @

(2V 6 V) P M U @ Connecting XT60 Ports on the Center Frame / Installing Battery
Spreading Wings S900 User Manual

© 2016 DJI. All Rights Reserved. 17

Installing and connecting battery 

1. Attach battery to battery tray. Do not use an oversized battery. Maximum installation dimension is 80mm X 

120mm X 200mm.

2. Connect the black connector and then the red connector to power on. Disconnect the red connector then 

black connector to power off.

Connectors are soldered Installing Battery

Inspect the surface of the battery connectors regularly. Replace connectors with signs of blackening 

due to oxidation. Failure to do so may lead to serious  ight accidents.
18 © 2016 DJI. All Rights Reserved. 

Setting Up the Landing Gear

Using a 2-position RC transmitter switch, landing gear retraction can be carried out remotely.

Setting up the transmitter

Select a 2-position switch (default setting is OK) as the control input for the landing gear. Ensure the 

corresponding receiver port is connected to the “IN” port on control board. For the A2 flight control 

system, connect the  ight controller’s F1 port to “IN” port on control board.

 Upper: Toggle the switch to this position to raise the landing gear.

 Lower: Toggle the switch to this position to lower the landing gear.

 If the transmitter switch has a FailSafe function, set the FailSafe value to the [Lower] position. This 

ensures that the landing gear will lower automatically when the receiver enters FailSafe mode.

 To avoid accidental switch triggering, slide levers or other controls can be used for landing gear 

control.

Usage procedures

1. Ensure transmitter and receiver batteries are fully charged.

2. Toggle the switch to the [Lower] position, and then turn on the transmitter.

3. Ensure the “R”, “L” and “IN” connections are correct.

4. Ensure the landing gear is in the [Lower] position, then power on the system. If a solid green LED on the 

landing gear control board lights up, everything is normal. If it  ashes green slowly, re-calibrate the system 

according to instructions in “Recalibrating Servo Travel”.

5. Toggle the switch to the [Upper] position ONLY AFTER takeoff.

6. Toggle the switch to the [Lower] position for landing. Setting Up the Landing Gear
Spreading Wings S900 User Manual

© 2016 DJI. All Rights Reserved. 19

 Servo power will shut off 3 seconds after the landing gear has reached its target position.

 When powering on the system, if the transmitter switch is in the [Upper] position, the LED will  ash 

red quickly as a warning. Toggle the switch to the [Lower] position to continue.

 If there is an abnormal signal or no signal input into the “IN” port, the LED will slowly  ash red. 

Check receiver and connections for problems.

 If servo power consumption is too high, the LED will light up red. If this lasts more than 4 seconds, 

the landing gear will lower and the LED will  ash green slowly. Re-calibration is needed before 

 ying.

 A2  ight control system users can use the A2 Assistant to set intelligent gear on the “Advanced” 

page. Refer to the “A2 user manual” for details.

LED Control Board Indicator

System normal — Solid green. 

Calibration required Blinks rapid green. 

Recalibration required Blinks slow green. 

Calibration failed — Solid yellow. 

Enter calibration mode Blinks rapid yellow.

System calibrating Blinks slow yellow.

Motor stalled — Solid red.

Unsafe startup alert Blinks rapid red.

 Input signal abnormal Blinks slow green. 

Landing Gear SpeciÀcations

Parameter Range Parameter Range

Working Voltage 3S~6S (LiPo) Input Signal PWM (High-Pulse Width 800us~2200us)

Working Current Max 1A@6S Output Signal PWM (Mid Position is 1520us) in 90Hz

Working Temperature -20~70° C Output Voltage 6V

Total Weight 875g Servo Travel 150° (Minimum 120° ) Setting Up the Landing Gear
20 © 2016 DJI. All Rights Reserved. 

Mounting the Gimbal

Before assembling the gimbal, install the GCU as shown below. Be sure to install on the side as shown below. 

A DJI Z15-GH4 (HD) gimbal has been used as an example in the following diagrams.

The connectors on gimbal should be removed for better performance, then the gimbal can be mounted to 

the lower connection points. Users of DJI Z15-5N / 7N gimbal, refer to the DJI Z15-5N / 7N Gimbal Mounting 

Notes (Page 21) for details. Mounting the Gimbal
Spreading Wings S900 User Manual

© 2016 DJI. All Rights Reserved. 21

Check that the system’s center of gravity is on the line as shown in the diagram below. Mounting the Gimbal DJI Z15-5N / 7N Gimbal Mounting Notes

 Due to the size restriction of the Z15-5N / 7N gimbal, users should purchase extended landing gear 

legs (used with Z15-5N / 7N gimbal) to avoid damage and/or failure during the self-test. Refer to the 

Part List Package No.34 (Page 31) for details.

 Follow the Mounting the Landing Gear (Page 6) instructions to mount extended landing gear legs. 

Then the gimbal can be mounted as shown below.

Package No.34 is for users whose landing gear legs are 300mm. Users whose landing gear legs are 

350mm have no need to purchase this part.
22 © 2016 DJI. All Rights Reserved. 

Appendix

ESC Sound

ESC State Sound

Ready 1234567--B--B

Throttle stick is not at bottom BBBBBB...

Input signal abnormal B- - - - - - - - B- - - - - - - - B...

Input voltage abnormal BB- - - BB- - - BB- - - BB...

ESC LED

ESC State LED 

Standby Off

Motor rotating Solid Red or Green On

Motor rotating at full throttle position Solid Yellow On

DJI ESCs are specifically designed for multi-rotors. When used with DJI autopilot systems 

parameters and travel ranges do not have to be calibrated. 

SpeciÀcations

Frame

Diagonal Wheelbase 900mm

Frame Arm Length 358mm

Frame Arm Weight

(with Motor, ESC, Propeller )

316g

Center Frame Diameter 272mm

Center Frame Weight (with Landing Gear 

Mounting Base, Servos)

1185g

Landing Gear Size 460mm(Length)×450mm(Width)×360mm(Height) 

Motor

Stator Size 41×14mm

KV 400rpm/V

Max Power 500W Appendix
Spreading Wings S900 User Manual

© 2016 DJI. All Rights Reserved. 23

Weight (with Cooling Fan) 158g

ESC

Working Current 40A

Working Voltage 6S LiPo

Signal Frequency 30Hz ~ 450Hz

Drive PWM Frequency 8KHz

Weight (with Radiators) 35g

Foldable Propeller (1552/1552R)

Material High strength performance engineered plastics

Size 15×5.2 inch

Weight 13g

Flight Parameters

Takeoff Weight 4.7Kg ~ 8.2Kg

Total Weight 3.3Kg

Power Battery LiPo (6S,10000mAh~15000mAh,15C(Min))

Max Power Consumption 3000W

Hovering Power Consumption 1000W (@6.8Kg Takeoff Weight)

Hovering Time 18min (@12000mAh & 6.8Kg Takeoff Weight)

Working Environment Temperature -10° C ~ 40° C

Gain Value Settings

Flight Control

Basic Attitude

Pitch Roll Yaw Pitch Roll Vertical

A2 110% 110% 120% 220% 220% 120%

WooKong-M 160% 160% 160% 190% 190% 100% Appendix
24 © 2016 DJI. All Rights Reserved. 

Remounting the Propellers

Instructions

1. Use two M3×12.3 screws and four washers to remount propellers.

2. Apply thread locker to the thread of the propellers mount  rst. 

3. Af x screws with 4Kg ∙ cm (0.4N ∙ m) torque.

Refer to original screw tensions if you are unfamiliar with torque measurements. Applying thread 

locker to the propeller mount  rst avoids getting thread locker into the holes of the plastic propeller.

Loose screws cannot be securely locked with thread locker. G V G P G V G P

Red

Black

Blue

Thick wire

Solder pad

Blue

Black

Red

Fine wire

Fine wire

Thick wire

CCW arms CW arms

Propeller Precautions

Torque markers on the screws and propeller covers will give you a visual cue to check whether the propellers 

are loose. Check the torque markers before every  ight.

FAQ

Soldering the ESC

Be sure to solder the thick wires and  ne wires correctly when soldering an ESC to the frame arm.

Clockwise (CW) and counter clockwise (CCW) motors have a different arrangement of the colored wires. FAQ
Spreading Wings S900 User Manual

© 2016 DJI. All Rights Reserved. 25

Using the Propeller Holder 

Instructions

1. Insert the propeller blades into the propeller holder. 2. Attach the propeller holder to the frame arm.

Assembling Motor Vibration Absorbers 

A soft damper is part of the vibration absorber. Assemble soft dampers as shown below. Assembly is the 

same for CCW and CW propellers. 

 Ensure all soft dampers and vibration absorbers are in good condition before every  ight. If not, 

replace immediately. Otherwise, the  ight performance of your aircraft will be adversely affected.

 Before installing the soft dampers, put the copper gaskets onto the four mounting holes on the 

carbon plate. Then put the soft dampers into the mounting holes.

 After tightening the screws, the vibration absorbers may be twisted. If this is the case, hold the 

motor with your thumbs under the base plate and  ngers on the top carbon plate, and squeeze the 

plates together to make the vibration absorbers  at and parallel with the plates. FAQ
Spreading Wings S900 User Manual

26 © 2016 DJI. All Rights Reserved. 

Remounting the Landing Gear Servo 

Remounting servos is not recommended as they are pre-installed. 

Instructions

1. Connect the left servo cable to the “L” port of the landing gear control board.

2. Connect the right servo cable to the “R” port of the landing gear control board.

3. Press and hold the SET button using a pin then power on. You will see a yellow LED beside the SET button 

 ashing quickly. Wait as servos complete position initialization.

4. Make sure the arm connecting to the servo is parallel to the link as shown in the following diagram.

5. Assemble the left and right servos to the left (between M3, M4) and the right (between M5, M6) parts of the 

landing gear. Power off.

Recalibrating Servo Travel 

Instructions

1. Keep your hands away from all moving parts.

2. Ensure the “R”, “L” and “IN” connections are correct.

3. Keep the whole aircraft off of the ground during calibration, as landing gear will move.

4. Press and hold the SET button using a pin while powering on, then release. An LED will flash yellow 

quickly. Press the SET button again. Auto calibration will begin and the LED will  ash yellow slowly. DO 

NOT obstruct any moving parts during auto calibration.

5. During calibration, the left landing gear will raise and lower, followed by the right landing gear. 

6. After calibration, both the left and right landing gears will be lowered and the LED will display a solid green 

light. This indicates that the landing gear is working properly.

 If the LED is solid yellow after calibration, a problem has occurred. Carry out the instructions in 

“Remounting the Landing Gear Servo” then try again.

 Avoid obstructions during calibration. If the landing gear was obstructed, recalibration will be 

required, per the above steps.

 If the “R” and “L” servo cables are reversed, travel will not be measured correctly. Fix the 

connections and recalibrate the landing gear using the above steps.

 Landing gear travel has been pre-calibrated. Mechanical adjustment of the gear travel is not 

recommended.

After Installation

Servo

Connecting arm

Link

R L IN

To left servo To receiver channel (To F1 port if use A2) SET Button

LED

To right servo
© 2016 DJI. All Rights Reserved. 27

Package No.

Package Part No. CW as clockwise CCW as counter clock wise B as Balck R as Red G as Green

01-Frame Arm 02-Center Frame;

;

; ; ;

; 03-Landing Gear S900 S9020101CCW

Part List

If you require a replacement part, locate the part that you wish to replace in the following tables. Then order 

the package that comes with the speci ed part. The numbering of the part is de ned as follow: S9012501CCW/ S9012502CW

M3x12.3 (hexagan) S9012101B/ S9012201R

S9010801/ S9013501 S9011001 S9012901/ S9013001/

S9013101/

S9013201

S9012301R/ S9012401G

M3x10.3 S9010401CCWB/ S9010501CCWR/ S9010601CWB/ S9010701CWR

S9012302/ S9012402 M3x12.3 (cheese)

S9012503 S9010404/ S9010504/ S9010604/ S9010704 S9010403/

S9010503/

S9010603/

S9010703 S9010402/ S9010502/ S9010602/ S9010702 S9010802 M3x4.5 S9012902/ S9013002/

S9013102/

S9013202

S9012903/

S9013003/

S9013103/

S9013203 S9012102B/ S9012202R/ S9013701R/

S9013801B

Frame Arm

Package No. Name Part No.

4 S900 Frame Arm CCW - Black S9010401CCWB, S9010402, S9010403, 

S9010404, M3×12.3 (cheese)

5 S900 Frame Arm CCW - Red S9010501CCWR, S9010502, S9010503, 

S9010504, M3×12.3 (cheese)

6 S900 Frame Arm CW - Black S9010601CWB, S9010602, S9010603, 

S9010604, M3×12.3 (cheese)

7 S900 Frame Arm CW - Red S9010701CWR, S9010702, S9010703, 

S9010704, M3×12.3 (cheese)

8 S900 Motor Damping Unit S9010801, S9010802, M3×10.3

10 S900 Motor Mount Carbon Board S9011001, M3×4.5 Part List
Spreading Wings S900 User Manual

28 © 2016 DJI. All Rights Reserved. 

21 S900 4114 Motor with black Prop cover S9012101B, S9012102B, M3×4.5

22 S900 4114 Motor with red Prop cover S9012201R, S9012202R, M3×4.5

23 S900 ESC with Red LED S9012301R, S9012302, M3×12.3 

(cheese)

24 S900 ESC with Green LED S9012401G, S9012402, M3×12.3 

(cheese)

25 S900 Propeller Pack S9012501CCW, S9012502CW, 

S9012503, M3×12.3 (hexagan)

S9020301

S9020302

S9020901 M3x8 (self-tapping) 

M3x6.5

S9021201L

S9021202R

S9021203/

S9021101

S9021501

S9021502

M2.5x8 (cheese)

M3x6.5

S9021401

S9021503/

S9032703

M2.5x8 (cheese)

Center Frame Part List
Spreading Wings S900 User Manual

© 2016 DJI. All Rights Reserved. 29

Package No. Name Part No.

3 S900 Lock Knob S9020301, S9020302, M3×8 (self-tapping)

9 S900 Center Frame Support Pillar S9020901, M2.5×8 (cheese)

12 S900 Arm Mounting Bracket S9021201L, S9021202R, S9021203, 

M3×6.5

14 S900 Center Frame Bottom Board S9021401, M3×4.5 (cheese), M3×8 (selftapping), M3×6.5, M3×5.5

15 S900 Center Frame Top Board S9021501, S9021502, S9021503, M3×6.5, 

M2.5×8 (cheese)

11 S900 Frame Arm Mounting Steel Shaft S9021101

Landing Gear S9031601/ S9033304 S9031603/ S9033305 S9031602/ S9033303 S9031604/ S9033306 S9031605/ S9033307 S9033301 S9033302 M2.5x5 S9031802 S9031803 S9031804 S9031805 M2.5x8(cheese) S9031806 S9031807 M3x8 S9031808 S9031809 M1.6x5 S9031810 S9031811

S9031812 S9031814 S9031815 S9031801

S9031712 S9031701 M2.5x10 (socket cap) M2.5x13 M3x6.5 S9031903 S9031904 S9031905 M3x4.5 M3x6.5 M3x6.8

S9031902 S9031901

S9032001 S9032002 M2.5x8 (socket cap)

M2.5x8 (cheese) S9032601 S9032602 S9032603 S9032606 M3x22 (socket cap) S9032604

S9032605 M2.5x8 (socket cap) S9030201 S9033313 S9033308 S9033309 S9033310 S9033311 S9033312 S9031713/ S9031813 S9033314 Caution (1) Parts within the dotted box are mirrored against each other. 

 Except for S9031814 and S9031815.

(1) Part List
Spreading Wings S900 User Manual

30 © 2016 DJI. All Rights Reserved. 

S9032701

S9032702

S9013601 S9020201 S9020202

S9020103 S9020104

Package No. Name Part No.

16 S900 Gimbal 

Damping Bracket

S9031601, S9031602, S9031603, S9031604, S9031605, 

M2.5×5, M2.5×13

17 S900 Retractable 

Module (Right)

S9031701, S9031702, S9031703, S9031704, S9031705, 

S9031706, S9031707, S9031708, S9031709, S9031710, 

S9031711, S9031712, S0031713, M1.6×5, M2.5×10 (socket 

cap), M2.5×8 (cheese), M2.5×5, M3×8, M3×4.5, M3×6.8

18 S900 Retractable 

Module (Left)

S9031801, S9031802, S9031803, S9031804, S9031805, 

S9031806, S9031807, S9031808, S9031809, S9031810, 

S9031811, S9031812, S9031813, S9031814, S9031815, 

M1.6×5, M2.5×10 (socket cap), M2.5×8 (cheese), M2.5×5, 

M3×8, M3×4.5, M3×6.8

19 S900 Gimbal 

Damping 

Connecting 

Brackets

S9031901, S9031902, S9031903, S9031904, S9031905, 

M2.5×5, M3×6.5

20 S900 Landing Skid S9032001, S9032002

26 S900 Landing Gear 

Leg

S9032601, S9032602, S9032603, S9032604, S9032605, 

S9032606, M2.5×8 (socket cap), M3×22 (socket cap)

2 S900 Battery Tray S9030201

33 S900 Gimbal 

Mounting 

Accessories

S9033301, S9033302, S9033303, S9033304, S9033305, 

S9033306, S9033307, S9033308, S9033309, S9033310, 

S9033311, S9033312, S9033313, S9033314, M2.5×5, 

M2.5×13, M2.5×8 (cheese)

Miscellaneous Part List

S9033401

Caution: This part is used with Z15-5N / 7N gimbal.
Spreading Wings S900 User Manual

© 2016 DJI. All Rights Reserved. 31

Package No. Name Part No.

13 S900 Center Frame Package 3, 9, 12, 14, 15

29 S900 Complete Arm [CW-RED] Package 7, 8, 10, 11, 22, 23, 25, S9012901, 

S9012902, S9012903

30 S900 Complete Arm [CW-Green] Package 6, 8, 10, 11, 21, 24, 25, S9013001, 

S9013002, S9013003

31 S900 Complete Arm [CCW-RED] Package 5, 8, 10, 11, 22, 23, 25, S9013101, 

S9013102, S9013103

32 S900 Complete Arm [CCW-Green] Package 4, 8, 10, 11, 21, 24, 25, S9013201, 

S9013202, S9013203

27 S900 GPS Holder S9032701, S9032702, S9032703, M2.5×8 (cheese)

28 S900 Screw Pack Assorted screws

1 S900 Power Cord Plug S9020101, S9020102, S9020103, S9020104

34 S900 Extended Landing Gear Leg S9033401

35 S900 Rubber Damper for 4114 Motor S9013501, M3×10.3

36 S900 Propeller Holder S9013601

37 S900 4114 Motor-Red Prop Cover S9013701R, M3×12.3 (hexagan)

38 S900 4114 Motor-Black Prop Cover S9013801B, M3×12.3 (hexagan)

FCC Statements

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant 

to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful 

interference when the equipment is operated in a commercial environment. This equipment generates, uses, 

and can radiate radio frequency energy and, if not installed and used in accordance with the instruction 

manual, may cause harmful interference to radio communications. Operation of this equipment in a residential 

area is likely to cause harmful interference in which case the user will be required to correct the interference 

at his own expense. FCC Statements
© 2016 DJI. All Rights Reserved. 

The content is subject to change.

Download the latest version from

http://www.dji.com/product/spreading-wings-s900

If you have any questions about this document, please contact DJI 

by sending a message to DocSupport@dji.com.