# Spreading Wings S900

User Manual V1.2

2014.12

### 2 © 2014 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 certification. 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 efficiency propellers ensure dynamic stability and maximized power efficiency. Used

with a professional DJI multi

- rotor autopilo t system, the S900 can hover and fly reliably making it ideal for

photography and cinematography.

126mm

305mm

433mm© 2014 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

Specifications 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 © 2014 DJI. All Rights Reserved. 

# Cautions

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

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 first.

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

1. ESCs are not water

- proof, please do not fly in rain or snow.

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

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

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

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

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

6. When flying, 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 flight 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.

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



# Legend

Important Hints and Tips 

### Others Flight Cautions Assembly Cautions

Cautions© 2014 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 CW propellers ×2

CCW propellers ×2



### or

3

- PIN Connection Cables ×8 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

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

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

Foam Double Sided Adhesive Tape Mounting receiver, controller and other modules. Thread Locker Fastening screws. 

### Tools Usage I n Th

e Box

### 6 © 2014 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. Affix 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 ab ove the landing skid tube.

70mm

30mm M2.5×8

(socket cap) Mountin

g

th

e Landin

g Gear© 2014 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 firmly 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.



### Cover Propeller

Screw Mount Power Cable

Screw

Motor

ESC CW or CCW Mark

LED* ESC Signal Cable

*LED is on after motor started.

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. Mountin

g Fram

e Arms

### 8 © 2014 DJI. All Rights Reserved.

Spreading Wings S900 User Manual

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. Mountin

g Fram

e Arms© 2014 DJI. All Rights Reserved. 

### 9 Spreading Wings S900 User Manual

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 Mountin

g Fram

e ArmsSpreading Wings S900 User Manual



### 10 © 2014 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.© 2014 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 flight control system has been used here as an example. If using

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

the DJI WK

- M flight control system, please refer to the WK

- M user manual for connections. Also be sure the

firmware on your DJI flight 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.

3. Mount the flight controller in the reserved position near the PMU module. Only mount the IMU in the IMU position of the center frame. 

### IMU

M 1

F

4

M 2 LIN K

LE D F 3

M 3

F

2

M 4

F

1

M5

X3

M6

X2

M 7

X 1 M 8 CONTROLLE R UNIT S

2

S

1

M 1

M 2

M 3

M 4

M 5

M 6

M 7

M 8 LINK LED

Reserved Position F 4

F 3

F 2

F 1

X 3

X 2

X 1

CONTROLLER UNIT

S 2

S 1

A2 Flight Controller Mountin

g Electronic

s an

d Wiring

CAN

1 CAN

2 CA N

1 CA N

2 AN T

AN TSpreading Wings S900 User Manual



### 12 © 2014 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 fingers in the bracket when folding for transportation.



### M1

M2

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

LED flight indicator, iOSD module and wireless video transmission module. Mountin

g Electronic

s an

d WiringSpreading Wings S900 User Manual

© 2014 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.

Use glue to install the GPS bracket. Ensure it is firm and stable before every flight.

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

user manual for details. Mount the GPS with a bracket to avoid interference from the center frame power board. dampers Mountin

g Electronic

s an

d WiringSpreading Wings S900 User Manual



### 14 © 2014 DJI. All Rights Reserved. M 1

M 2

M 3

M 4

M 5

M 6

M 7

M 8 LINK LED F 4

F 3

F 2

F 1

X 3

X 2

X 1

CONTROLLER UNIT

S 2

S 1

yellow 1 3

brown 2 

### Connecting the flight controller to the center frame

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

2. Connect the flight 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

flight 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

M2

M1 

### M3 M2

M3 

### M4

M4 

### M5

M5 

### M6

M6

A2 Flight Controller

Using the 3

- pin connection cable:

M1 through M6 correspond to each motor number. the ESC Signal Outlet

M1

M2

M3

M4

M5

M6

the ESC Signal Outlet A2 Flight Controller 

## 3 1 yellow



## 2 M1

M 2

M 3

M 4

M 5

M 6 brown

M1

M 2

M 3

M 4

M 5

M 6 M M 1 1

M 2 M 2 LINK LED

M 3 M M 3 4

M 4 M 5

M 6 M M 5 7 F 4

F 3

F 2

F 1

X 3

X 2

X 1

M 6 M 8 CONTROLLER UNIT

S 2

S 1 CAN

1 CAN

2 CAN

1 CAN

2 Mountin

g Electronic

s an

d Wiring AN T

AN TSpreading Wings S900 User Manual

© 2014 DJI. All Rights Reserved. 

### 15 M 1

M 2

M 3

M 4

M 5

M 6

M 7

M 8 LINK LED F 4

F 3

F 2 F F 1 1

X 3

X 2

X 1

CONTROLLER UNIT

S 2

S 1 M6 correspond to each motor number.

M1

M2

M3

M4

M5

M6

WKM Flight Controller the ESC Signal Outlet



### Connecting the flight 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 flight control system, connect the F1 port of the flight controller to the “IN” port of the landing

gear control board. Other flight control systems connect a 2

- position channel receiver to the “IN” port.

Right Servo Connector Left Servo Connector

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. IN R If using a DJI WK

- M flight controller, you must use the wires that came with the WK

- M. M1 through

M1

M 2

M 3

M 4

M 5

M 6

R L IN Mountin

g Electronic

s an

d Wiring

C AN

1

C AN

2 AN T

### 16 © 2014 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

6S V

- SEN

3V @ 5V X 1

P M U P W

(2V

@6

V)

Connectin

g XT6

0 Port

s

o

n th

e Cente

r Fram

e

/ Installin

g Battery© 2014 DJI. All Rights Reserved. 

### 17 Spreading Wings S900 User Manual

Connectors are soldered



### 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. Installin

g Battery

### 18 © 2014 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 flight 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 flashes 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. Settin

g

U

p th

e Landin

g GearSpreading Wings S900 User Manual

© 2014 DJI. All Rights Reserved. 

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

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 flash 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 flash green slowly. Re

- calibration is needed before

flying.

A2 flight 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

Calibration failed

— Solid yellow.

System calibrating Blinks slow yellow.



### Landing Gear Specifications

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° ) Unsafe startup alert Blinks rapid red.

Input signal abnormal Blinks slow green. Motor stalled

— Solid red. Enter calibration mode Blinks rapid yellow. Recalibration required Blinks slow green. Calibration required Blinks rapid green. System normal

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

Settin

g

U

p th

e Landin

g Gear

### 20 © 2014 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. Mountin

g

th

e GimbalSpreading Wings S900 User Manual

© 2014 DJI. All Rights Reserved. 

### 21 Check that the system’s center of gravity is on the line as shown in the diagram below.



### DJI Z15

- 5N / 7N Gimbal Mounting Notes

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. Due to the size restriction of the Z15

- 5N / 7N gimbal, users should purchase extended landing gear Mountin

g

th

e Gimbal

### 22 © 2014 DJI. All Rights Reserved. 

# Appendix

ESC Sound

Ready 1234567

-- B

-- B

Input signal abnormal B

-------- B

-------- B...



## ESC LED

Standby Off

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.



## Specifications

Frame Arm Length 358mm

Center Frame Diameter 272mm

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

Stator Size 41×14mm

Max Power 500W KV 400rpm/V 

### Motor Center Frame Weight (with Landing Gear 1185g

Mounting Base, Servos) Frame Arm Weight

(with Motor, ESC, Propeller ) 316g 

### Frame

Diagonal Wheelbase 900mm Motor rotating Solid Red or Green On ESC State LED Input voltage abnormal B B

-- - B B

--- B B

- -- BB... Throttle stick is not at bottom BBBBBB... ESC State Sound

AppendixSpreading Wings S900 User Manual

© 2014 DJI. All Rights Reserved. 

### 23 Working Current 40A

Signal Frequency 30Hz

~ 450Hz

Weight (with Radiators) 35g

Material High strength performance engineered plastics

Weight 13g

Takeoff Weight 4.7Kg

~ 8.2Kg

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

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

Working Environment Temperature

- 10° C ~ 40° C



## Gain Value Settings

Flight Control

Pitch 

### Basic

Roll Yaw Pitch 

### Attitude

Roll Vertical



### A2 110% 

### 110% 120% 220% 220% 120%



### WooKong

- M 160% 

### 160% 160% 190% 190% 100% Hovering Time 18min (@12000mAh & 6.8Kg Takeoff Weight) Max Power Consumption 3000W Total Weight 3.3Kg 

### Flight Parameters Size 15×5.2 inch 

### Foldable Propeller (1552/1552R) Drive PWM Frequency 8KHz Working Voltage 6S LiPo Weight (with Cooling Fan) 158g



### ESC

Appendix

### 24 © 2014 DJI. All Rights Reserved. 

# FAQ

Soldering the ESC

Be sure to solder the thick wires and fine 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.

CCW arms CW arms



## 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 first.

3. Affix 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 first avoids getting thread locker into the holes of the plasti c propeller.



## 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 flight. Loose screws cannot be securely locked with thread locker. Solder pad

Blue

Black

Red Red

Black

Blue

Thick wire

Fine wire

Fine wire

Thick wire G

V G

P G

G

P

V

FAQSpreading Wings S900 User Manual

© 2014 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 flight. If not,

replace immediately. Otherwise, the flight 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 fingers on the top carbon plate, and squeeze the

plates together to make the vibration absorbers fla t and parallel with the plates. FAQSpreading Wings S900 User Manual



### 26 © 2014 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

flashing 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.



### After Installation



## 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 flash 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. R L IN

To right servo

To left servo

To receiver channel

(To F1 port if use A2) 

### Servo

Connecting arm

Link

SET Button

LED© 2014 DJI. All Rights Reserved. 

### 27 

# 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 specified part. The numbering of the part is defined as follow:

S900 

# S9020101CCW

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 Package No. Package Part No.



### Frame Arm

M3x12.3 (hexagan)

S9012501CCW/

S9012502CW S9012102B/

S9012202R/

S9013701R/

S9013801B

S9012503

S9012101B/

S9012201R M3x10.3

S9010801/

S9013501

S9010802

S9011001

M3x4.5

S9012902/

S9013002/

S9013102/

S9013202

S9012901/

S9013001/

S9013101/

S9013201

S9012301R/

S9012401G S9012903/

S9013003/

S9013103/

S9013203

S9010401CCWB/

S9010501CCWR/

S9010601CWB/

S9010701CWR

S9012302/

S9012402

M3x12.3 (cheese) S9010402/

S9010502/

S9010602/

S9010702 S9010403/

S9010503/

S9010603/

S9010703

S9010404/

S9010504/

S9010604/

S9010704

4 

### S900 Frame Arm CCW

- Black S9010401CCWB, S9010402, S9010403,

S9010404, M3×12.3 (cheese)

6 S900 Frame Arm CW

- Black S9010601CWB, S9010602, S9010603,

S9010604, M3×12.3 (cheese)

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

10 S900 Motor Mount Carbon Board S9011001, M3×4.5 7 S900 Frame Arm CW

- Red S9010701CWR, S9010702, S9010703,

S9010704, M3×12.3 (cheese) 5 

### S900 Frame Arm CCW

- Red S9010501CCWR, S9010502, S9010503,

S9010504, M3×12.3 (cheese) 

### Package No. Name Part No. Par

t List

### 28 © 2014 DJI. All Rights Reserved.

Spreading Wings S900 User Manual



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

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

(cheese)

25 S900 Propeller Pack S9012501CCW, S9012502CW,

S9012503, M3×12.3 (hexagan)



### Center Frame

S9020301

M2.5x8 (cheese)

S9021502

S9021503/

S9032703

M3x6.5

S9021501

S9020901 S9020302

M3x8 (self

- tapping)

S9021201L

S9021203/

S9021101 S9021202R

S9021401 M2.5x8 (cheese)

M3x6.5 

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

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

Par

t List© 2014 DJI. All Rights Reserved. 

### 29 Spreading Wings S900 User Manual



### 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 (self

tapping), 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

M3x4.5

S9031902

S9031814

S9031815

M3x6.5

S9031901

M2.5x13

S9031604/

S9033306

S9031602/

S9033303

S9033301

S9033302

S9031603/

S9033305

S9031601/

S9033304

S9031605/

S9033307

M2.5x5

M2.5x8 (cheese)

S9033308

S9033309

S9033310

S9033311

S9033312 S9032605 M2.5x10 (socket cap)

S9031808

S9031809

M1.6x5

S9031810

S9031811 S9031812

S9031712

S9031903

M3x6.5

S9031904

S9031905

S9031701

S9030201

S9033313

S9033314

S9031801

M3x8

S9031802

S9031803

S9031804

S9031805

M2.5x8(cheese)

S9031806

S9031713/

S9031813

M2.5x8 (socket cap)

S9032601

S9032602 M2.5x8 (socket cap) (1) S9031807

M3x6.8

S9032001

S9032002

S9032603

S9032606

M3x22 (socket cap)

S9032604 Caution (1) Parts within the dotted box are mirrored against each other.

Except for S9031814 and S9031815. Par

t List

### 30 © 2014 DJI. All Rights Reserved.

Spreading Wings S900 User Manual

16 

### S900 Gimbal

Damping Bracket S9031601, S9031602, S9031603, S9031604, S9031605,

M2.5×5, M2.5×13

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

20 S900 Landing Skid S9032001, S9032002

2 S900 Battery Tray S9030201



### Miscellaneous

S9032701

S9032702 S9013601 S9020201 S9020202

S9020103 S9020104

Caution: This part is used with Z15

- 5N / 7N gimbal. S9033401 

### 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) 26 S900 Landing Gear S9032601, S9032602, S9032603, S9032604, S9032605,

Leg S9032606, M2.5×8 (socket cap), M3×22 (socket cap) 19 S900 Gimbal

Damping

Connecting

Brackets S9031901, S9031902, S9031903, S9031904, S9031905,

M2.5×5, M3×6.5 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 

### Package No. Name Part No.

Par

t List© 2014 DJI. All Rights Reserved. 

### 31 Spreading Wings S900 User Manual



### 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. FC

C StatementsYou may visit DJI offical website to obtain the latest version of user manual.

User manual is subject to change without prior notice.



### http://www.dji.com/product/spreading

- wings

- s900

© 2014 DJI. All Rights Reserved.