# Spreading Wings S900 User 

# Manual [v1.2) 2014.12

# 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 liabilityfor 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 totake adequate measures. DJI is a registered trademark of DJI. Names of product, brand, etc., appearing in this manual are trademarks or registered trademarks oftheir respective owner companies. This product and manual are copyrighted by DJI with all rights reserved. No partof this product or manual shall be reproduced in anyform 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 autopilot system, the S900 can hover and fly reliably making it ideal for photography and cinematography.

A----- 433mm



### 2 ©2014 DJI. All Rights Reserved.

# Contents Disclaimer About Contents Cautions Legend In The Box Mounting the Landing Gear Mounting FrameArms Mounting Electronics and Wiring Connecting XT60 Ports on the Center Frame Installing Battery Setting Up the Landing Gear Mounting the Gimbal Appendix ESC Sound ESC LED Specifications Gain Value Settings 

### FAQ Soldering the ESC Remounting the Propellers Propeller Precautions Using the Propeller Holder Assembling Motor Vibration Absorbers Remounting the Landing Gear Servo Recalibrating Servo Travel 

### Part List FCC Statements 2 2 

### 3 4 4 

### 5 6 

### 7 11 16 16 18 

### 20 22 22 22 22 

### 23 24 24 24 24 25 25 26 26 27 31

©2014 DJI. All Rights Reserved. 

### 3

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



### Assembly Cautions 1. Use a bracketto 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 obstructionsto 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 lockerfirst. 7. The S900 should be lifted off the ground when testing landing gearor recalibrating servo travel. 

### Flight Cautions 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 ofyour 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 beforeflying. 5. Ensure ESC signal connectors and powercable connectors are tight before everyflight. 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 orderwhen using the DJI 

### A2. flight control system to avoid damage or injury. 9. Do not overload the system. 10. Do not getclose to ortouch motors or propellers when they are spinning as this can cause serious injury. 11. Disconnectthe batteryand 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, contactyour dealer or DJI customer service. 

# Legend**~** Important

## ~\): Hints and Tips



### 4 ©2014 DJI. All Rights Reserved.

# In The Box
Center Frame x1

Landing Skid Tubes 

## x2 (with Silicone Rubber Dampers)

## o~----~E~------o GPS Collapsible Mount x1

Connection Cable Connector Set x1



### or 3-PIN Connection Cables x8


### 3-PIN Servo Cable x1

Tools Required

Tools 2.0mm Hex Wrench, 2.5mm HexWrench Thread Locker Nylon Cable Tie, Scissors, Cutting Pliers/Dykes Foam Double Sided Adhesive Tape 

### FrameArms x6

Landing Gear Legs 

## x2

Springs 

## x2

Accessories Package x1 CW propellers x2 CCW propellers x2 Magic tapes x4 The red knobs x6 Landing gear leg rings x4 Soft dampers x50 

### Screw Package x1 Forframe arms mount: M4x35 For landing gear mount: M3x8, M2.5x8 (socket cap), M3x22 (socket cap)


### Usage Mounting screws. Fastening screws. Binding devices and wires. Mounting receiver, controller and other modules.

©2014 DJI. All Rights Reserved. 

### 5

# 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 M2.5x8 (socket cap) screw. Ensure silicone rubber dampers are attached to each end. 3. Insertthe landing gear leg into connection point on the centerframe. Affix in place with M3x8 screws. 4. Connect both springs on the legs to the centerframe.



# 0 :**~** 

# . .**M2.5x8 ~**  (socket cap) 

## IJ

• Note the springs are 58.5mm before connecting to the center frame, and are stretched to ?Omm

when mounting is completed. • It is recommended 

### thatthe landing gear leg ring be placed about30mm above the landing skid tube.



### 6 ©2014 DJI. All Rights Reserved.

# Mounting Frame Arms Instructions 1. Prepare the arms. (1) Check all propellers for cracks, then install and screw each propeller coveron tightly. (2) Ensure all motors are mounted firmly and rotate freely. (3) Mountall arms with red propeller covers to M1 and M2to indicatethe noseof 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 ofthe centerframe.

Cover Propeller

Screw**-- -----;~;;**  Motor**----::;:T- ---j1** **~~~** CW or CCW Mark 

### LED*

2. Insert each frame arm vertically into the mounting areaon the center frame. 3. Line up the screw holes of the frame arm and centerframe. 4. Insert the M4x35 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 connectorabrasion. Power Cable ESC Signal Cable



### *LED is on after motor started.

©2014 DJI. All Rights Reserved. 

### 7Spreading Wings S900 User Manual
5. Gently liftthe 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. Checkthe arm for movement. To store, untwistthe knob and lowertheframe arm.**,~---** 

# ! 

# 11/1 III 

# I

i

7. Now unscrew 6 screws (M2.5x8 cheese) on the upper plate of the center frame and remove the upper plate. Then unscrewthe 4 screws (M3x8 self-tapping, found under the center frame) of the round cover and remove itto gain accesstothe ESC and power cable installation area. 8. Plug each ESC signal cable into the slot neareach arm on the center frame.



### 8 ©2014 DJI. All Rights Reserved.Spreading Wings S900 User Manual
9. Connectthe power cables tothe centerframe. 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. 

# @@ V 

# X

11. Ensure all ESC cables, and powercables are correctly installed onto the centerframe.

©2014 DJI. All Rights Reserved. 

### 9Spreading Wings S900 User Manual
12. Replace the round cover of the center plate, and re-tighten the 

### 4 screws (M3x8 self-tapping). Then replace the upper plate ofthe center frame, and re-tighten the 6 screws (M2.5x8 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, M3and M5 rotate counter clockwise while those on arms M2, M4 and M6 rotate clockwise.



# M1

M3 M6

10 @ 2014 DJL All Rights Reserved.

# Mounting Electronics and Wiring Eight positions are reserved for mounting a flight control system, wireless video transmission module, receiver, and other accessories. The DJI A2flight 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 latestversion. 

## Instructions 1. Attach IMU moduleto the IMU areaofthe centerframe. Ensurethat it points toward the nose. 2. Attach the PMU module tothe center frame.



# & Only mount the IMU in the IMU position ofthe center frame.
3. Mountthe flight controller in the reserved position nearthe PMU module.

0 0 1!J**~:** 

## .... "'**"~ ~-·**  

# A2**·~ ~-·** **"'~ ~-·** **"'~ ~-** **,** 

## ......**~ "'~** **~-·** ..........,**~**

## ~b -&§ 

# • A2 Flight Controller

© 2014 DJI. All Rights Reserved. 

### 11...... 

### :r (Q SpreadingWings 5900 

### UserManual
4. Attach the GPS collapsible mount to the centerframe using M2.5x8screws. 5. Mount a GPS module to the GPS mount with a bracket. Ensure the arrow points toward the nose and avoid catching yourfingers in the bracket when folding fortransportation
.



# - 0

6. The other reserved positions are indicated in the diagram below and can be used for mounting a receiver, LEDflight indicator, iOSD module and wireless video transmission module

.



### 12 © 2014 DJI. All Rights Reserved.Spreading Wings S900 

### UserManual
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 appropriatethread locker. (2) Replace and tighten. 8. Note that the dampers are 30° silicon rubber. If you use other dampers or vibration absorbing balls, the qualityof your aerial photography may be affected.



# & •Mount the GPSwith a bracketto avoid interferencefrom the center frame power board. • Use glue to install the GPS bracket. Ensure it is firm and stable before everyflight. • Always test motors using the Assistant Software after installation. Refer to your flight control system

user manual for details.

© 2014 DJI. All Rights Reserved. 

### 13SpreadingWingsS900 User Manual 

### Connecting the flight controller to the centerframe 1. Connect the flight control system accordingtoyourflight control system user manual. 2. Connectthe 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 theconnectorset:

### ~~**~§~ c10i£§**  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- M4connections. 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) Black4-pin cables are for fourcontinuous ground pins connections. M1-M4 are connected as the following diagram shows.

# ::,**~** M4

# 5~ 0

# ~ M5

# -o**£) .)**  0 M6 0 0 0 0 0 0 0 0 0 

## Ml M2 M3 M4 

### M5 M6 0

# () l

....

0

A2. Flight Controller the ESC Signal Outlet Using the3-pin connection cable:**L~~ ~~** **~~~~ _j** **!lliJ** M1 through M6correspond to each motor number.

0 0 0 

### Ml 1-- M1

## D~ 0 0 0 

### M2 1--M2

# ~r)__, 0 0 0 

### M3 1--M3 1-- M4 0 0 0 

### M4**~** 

# LJ

.**~** 

### 1-- Ms 0 0 0 

### M5 1-- M6 0 0 0 

### M6 

# if

_ 0 0 0

## %~ 0 0 0 

### .._____

the ESC Signal Outlet 

### 14 @) 2014 DJL All Rights Reserved. 0 0**~** F4-o LINK LED F3..., F2..., 

# A2 F1 ..., Xll-o :x:z..., FLIGHT CONTROLLER X1...,

(Cijmg I Ep !!NIT) 

# •**~~** <51



# ------

A2 Flight ControllerSpreading Wings S900 User Manual 

# & If using a DJI WK-M flight controller, you must use the wires that came with the WK-M. M1 through M6 correspond toeach motor number.



### Ml 0 0 

### M2 0 0 

### M3 0 0**~** 

### M-4 0 0

# ~(2? f- MS 0 0 

# l M6 0 0 0 0 0 0

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" portofthe landing gear contr olboar d. 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. Otherflight control systems connect a2-position channel receiverto the "IN" port.**Dl** C) 0 ,

# ..**~** 

### _ ...

_ ,. 

## A2 _ ...

_ ,. _,. fl.!I;HI'"Q;Itffiii;IUD

_ ,. ........, 

### u 

## ib ii 

# ..

& •If right and left servo cables are reversed, the landing gearwill notfunction properly. • Connect all wires carefully and neatlyto avoid cable damage caused byframe edges

.

© 2014 DJI.All Rights Reserved. 

### 15 ..., 

## ::r (Q

## Q :::J 

### ffi g, :::J 

### co

# ~**~** ;::l. en 0 :::J st <D (') <D :::J 

## m .., "T1 

# 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 cableto the XT60 connector on top of the bottom board. 2. Connect the landing gear control board cable to the XT60 connectoron the bottom of the bottom board. 3. Other connectors can supply powerfor 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 overthe 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 backover the bullet connector.


# ======J:J+- - UI

-----111111
Connectors soldering diagram 

### 16 @) 2014 DJL All Rights Reserved.