T Manu

2014.12
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.

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.

2 © 2014 DJI. All Rlahts Reservec.
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

© 2014 DJI. All Rights Reserved.
When flying, the rotating propellers may cause serious damage and injury. Please fly 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.

o 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.

m

 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.

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 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 DJIA2 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.

/j\ Important iQ: Hints and Tips

4 © 2014 DJI. All Rights Reserved.
Center Frame x1

Landing Tubes x2

(with Silicone Rubber Dampers)

Mount x1

Connection Cable

Connector Set x1

^E

or

3-PIN Connection Cables x8

3-PIN x1

Frame Arms x6

zr

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8

ing Gear Legs x2

Springs x2

Package xl

CW propellers x2

CCW propellers x2

Magic tapes x4

The red knobs x6

Landing gear leg rings x4

Soft dampers x50

Screw Package x1

For frame arms mount: M4x35

For landing gear mount: M3x8,

M2.5x8 (socket cap), M3x22 (socket cap)

Tools Required

Tools

2.0mm Hex Wrench, 2.5mm Hex Wrench

Thread Locker

Nylon Cable Tie, Scissors, Cutting Pliers/Dykes

Foam Double Sided Adhesive Tape

Usage

Mounting screws.

Fastening screws.

Binding devices and wires.

Mounting receiver, controller and other modules.

© 2014 DJi. All Rights Reserved.
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. Insert the landing gear leg into connection point on the center frame. Affix in place with M3x8 screws.

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

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 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.

6 © 2014 DJI. All Rights Reserved.
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

Power Cable

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ESC Signal Cable

Screw

Motor

•CW or CCW Mark

LED*

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 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 connector abrasion.

© 2014 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.

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7. Now unscrew 6 screws (M2.5x8 cheese) on the upper plate of the center frame and remove the upper

plate. Then unscrew the 4 screws (M3x8 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.

8 © 2014 DJI. All Rights Reserved.
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.

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

ESC cables

power cables

© 2014 DJI. All Rights Reserved 9
Manual

12. Replace the round cover of the center plate, and re-tighten the 4 screws (M3x8 self-tapping). Then

replace the upper plate of the 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, M3 and M5 rotate counter clockwise while those on arms M2,

M4 and M6 rotate clockwise.

10 ©2014DJI All Rights Reserved.
Eight positions are reserved for mounting a flight control system, wireless video transmission module,

receiver, and other accessories. The DJIA2 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.

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

3. Mount the flight controller in the reserved position near the PMU module.

Reserved Position

-M, n;

-M2L6

>-M3

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UNX LED

A2 FLTCHT CONTROLLER

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A2 Flight Controller
4. Attach the GPS collapsible mount to the center frame using M2.5x8 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.

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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.

12 © 2014 DJI. All Rights Reserved.
User Manuai

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.

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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 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.

© 2014 DJI. All Righis Reserved. 13
User Manual

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.

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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.

—»

A2 Flight Controller the ESC Signal Outlet

through M6 correspond to each motor number.

the ESC Signal Outlet

14 © 2014 DJl. All Rights Reservec

Ml

M2

M3

M4

MS

M6

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«— M2

-M,

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1

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FLIGHAT CONTROLLE 2 R

{CONTROLLER UNIT}

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F2-.

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A2 Fliaht Controiie
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 to each motor number.

WKM Flight Controller

Ml

M2

MS

H4

M5

M6

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.

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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.

© 2014 DJi. All Rights Reserved. 15
rtina

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.

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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

16 © 2014 DJI. All Rights Reserved.