V1.2 2015.8

DJI E1200 Pro

User Manual

Propulsion Upgrade Kit for S900
© 2015 DJI. All Rights Reserved. 1

EN

 Disclaimer

Thank you for purchasing the E1200 Pro Propulsion Upgrade Kit for S900 (hereinafter 

referred to as “product”). Read this disclaimer carefully before using this product. By 

using this product, you hereby agree to this disclaimer and signify that you have read 

it fully. Please install and use this product in strict accordance with the manual. DJI 

assumes no liability for damage(s) or injuries incurred directly or indirectly from using, 

installing or refitting this product improperly, including but not limited to using accessories 

not designated. 

This device complies with part 15 of the FCC Rules. 

DJI is the registered trademark of SZ DJI Technology Co., Ltd. (abbreviated as “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. 

This disclaimer is made in various language versions; in the event of divergence 

among different versions, English version shall prevail.

 Warnings

When powered on, the motors and propellers will rotate very quickly and may cause 

serious damage or injury. Always be vigilant and make safety your top priority.

1. Always fly your aircraft at a safe distance from people, animals, power lines, and 

other obstacles.

2. Do not get close to or touch the motors or propellers when the unit is powered on.

3. Before flying, ensure that the propellers and frame arms are installed correctly and 

that the propellers are unfolded.

4. Ensure that all ESC connectors and power cables connectors are securely 

attached before every flight.

5. Ensure that all dampers are in good condition before every flight. If they are not, 

they may adversely affect flight performance and should be replaced prior to 

flight.

6. Check to ensure that all parts of the aircraft are in good condition before flight. Do 

not fly with worn or damaged parts.

7. Only use compatible DJI parts.

 Legend

Important Hints and Tips

DJI Support Website:

www.dji.com/support 

If you encounter any problems or if you have any questions, please contact your local 

DJI authorized dealer or DJI Support.
2 © 2015 DJI. All Rights Reserved. 

EN

 About

The E1200 Pro Propulsion Upgrade Kit for S900 is designed for use with DJI S900 

multirotor flying platforms. The E1200 Pro features enhanced efficiency, security, and 

endurance. The Z-Blade 17-inch foldable propellers are made using an advanced 

carbon-fiber-reinforced polymer, which reduces rotational inertia and enhances 

rigidity. New, upgraded motors promote efficient heat dissipation to improve 

endurance and reliability, even when flying in harsh environments. The Smart ESCs 

feature a sinusoidal drive, which provides greater efficiency and more agile dynamic 

response. After upgrading with this kit, your S900 will feature enhanced flight 

endurance, increased maximum takeoff weight, higher maximum takeoff altitude, and 

an extended range of environmental working temperatures.

 1. In the Box

Frame Arm 

Clockwise ×1

Frame Arm 

Counter-Clockwise ×1

Screws for arms (M3×14 hexagon) 

Screws for foldable propellers 

(M3×12.5 hexagon)

Screws for propeller mount cover 

(M3×8)

Screws for motor base mount

(M3×12 hexagon)

Soft dampers, Propeller washers

Screw Package:

 2. Gain Value Settings

The new E1200 Pro ESC, features a sinusoidal drive, which replaces the traditional 

square wave drive to offer improved performance when accelerating and 

decelerating. To achieve the same sensitivity as older ESCs, which use a traditional 

square wave drive, reduce the gain values according to your flight control system 

and frame. The table below shows typical gain values when using the E1200 Pro and 

a DJI A2 flight control system on a platform with a takeoff weight of 8 kg:

Basic Attitude

Pitch Roll Yaw Pitch Roll Vertical

90% 90% 80% 130% 130% 100%

The data above is based on ESC firmware v1.5 or above

 3. Installation

Tools compatible with the following screws are required:

Screws (M4×35), Screws for upper plate (M2.5×8 cheese head), Screws for round cover 

(M3×8 self-tapping), Screws for power cable bracket (M3×5.5 square drive, hexagon)

1) Remove the original frame arms of the S900

a. If the frame arm is erect, twist the red knob at the arm junction and lower the frame 

arm.
© 2015 DJI. All Rights Reserved. 3

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b. Now unscrew the six screws (M2.5×8 cheese head) on the upper plate of the 

center frame and remove the upper plate. Then unscrew the four screws (M3×8 

self-tapping) that secure the round cover and remove it.

c. Disconnect each ESC signal cable from the center frame. Then remove each 

screw (M3×5.5 square drive, hexagon) on the connecting bracket and unplug the 

power cables.

Propeller

CW or CCW Mark

Motor

Screw Mount

Built-in ESC

Power Cables

JST 3-pin Cable ESC Signal Cable

d. Unscrew the M4×35 screw and remove the original frame arm.

2) Install the upgrade frame arms

a. Prepare the arms by:

Checking all propellers for cracks and ensuring that all screws are tightened,

Ensuring that all motors are mounted firmly and rotate freely,

Identifying the clockwise and counter-clockwise marks on the propellers. The 

arms with the counter-clockwise marks will be mounted at positions M1, M3 and 

M5 of the center frame. The arms with the clockwise marks will be mounted at 

positions M2, M4 and M6 of the center frame.
4 © 2015 DJI. All Rights Reserved. 

EN

b. Insert the frame arm into the mounting slot on the center frame and line up the 

screw holes of the frame arm and center frame.

c. Insert the M4×35 screw from the right side of the frame arm, as shown below. 

Tighten each screw securely, but avoid over-tightening, which may lead to 

connector abrasion. 

d. Gently lift the frame arm and twist the red knob to lock the arm in place.

e. Plug each ESC signal cable into the slot nearest to each arm on the center frame.

ESC LED Indicator

Screws for Arms (M3×14 hexagon)
© 2015 DJI. All Rights Reserved. 5

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f. Connect the power cables to the center frame. Red cables correspond with the 

positive terminals and black cables correspond with the negative terminals. Rotate 

the bracket screws until they are tight and properly aligned with the connecting 

brackets, as shown below.

ESC Signal Cables

Power Cables

g. Tuck the excess length of the JST 3-pin cable back into the frame arm to avoid any 

potential flight complications.

h. Ensure that all ESC signal cables and power cables are correctly connected onto 

the center frame.

i. Replace the round cover and tighten the four screws (M3×8 self-tapping), then 

replace the upper plate of the center frame and tighten the six screws (M2.5×8 

cheese head).
6 © 2015 DJI. All Rights Reserved. 

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M2 M1

M5

M3 M6

M4

j. Double check all frame arms. Arms M1 and M2 correspond with the nose

direction of the aircraft. Arms M4 and M5 correspond with the tail. When viewed 

from above, the motors on arms M1, M3 and M5 should rotate counter clockwise 

and the motors those on arms M2, M4 and M6 should rotate clockwise.

Frame Arm Updater Computer

 4. Using the DJI ESC Assistant

The DJI ESC Assistant is used to upgrade ESC firmware, configure the propulsion 

system, etc.

An Updater is required and is not included with the E1200 Pro. To use the 

DJI ESC Assistant, connect the integrated ESC to a 

 computer through the Updater, as shown below.

Download the ESC Assistant: 

http://www.dji.com/product/e1200/download

Before using the Updater, unplug any other serial devices that are connected to your 

computer, then follow the instructions below:

1) Download the ESC Assistant from the DJI website. Run the installer and follow the 

prompts to complete the installation process.

2) Plug the JST 3-pin cable of the frame arm into the data port of the Updater and use 

a Micro-USB cable to connect the other end of the Updater to a computer. Turn on

the ESC system by connecting it to a 6S LiPo battery and do not disconnect the 

integrated ESC from the computer until the configuration is complete.

3) Run the ESC Assistant software and wait for the ESC to connect to the program. 

Watch the indicators on the bottom of the screen. When the ESC has been

successfully connected, the “Computer Connection” status will be solid green and 

the Data Exchange Indicator will blink blue.
© 2015 DJI. All Rights Reserved. 7

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4) Click on the “View” tab. In the “ESC” section, check the current firmware version 

and ensure that the installed firmware up-to-date. If it is not, click the link and 

follow the prompts to update it.

If the ESC is not automatically recognized by the DJI ESC Assistant (the 

indicators on the bottom of the screen show a solid green and an inactive 

blue), check whether there is more than one DJI Updater, FTDI USB adapter, 

or other developer tool (including, but not limited to, BeagleBone, Raspberry, 

Arduino, etc.), which may use the FTDI chipset, connected to the computer. If 

any of these FTDI devices are connected, simply unplug them and keep the 

DJI Updater connected to the computer. Then, restart the DJI ESC Assistant 

and the ESC system to form a successful connection.

 5. ESC LED Indicator & Sound Description

LED Indicators Sound Description

Yellow-Green, blinking in 

turn

None Motor is being connected

 / 

Red or Green, blinking 

slowly

1356 Ready

— / — 

Solid Red or Green None Motor starts normally

Red-Yellow, blinking in turn

None Self-test failure

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

BBB----BBB...

The motor parameters don’t 

match the firmware data saved in 

the ESC

Yellow, blinking quickly BBBBBB... Throttle stick is not at the bottom 

position

Yellow, blinking slowly B------B------B... No signal input

 — Solid Yellow None Motors are rotating at full throttle

Red, blinking quickly None Error, land your aircraft 

immediately*

* You can learn more about an error by connecting the integrated ESC to the ESC 

Assistant.

You can interpret the working status of the unit by observing the LEDs and 

listening to the sounds emitted from the ESC.

 6. Specifications

Max Thrust 3900 g/rotor @ 25 V (Sea Level)

Takeoff Weight Recommended 1200 to 1400 g/rotor (Sea Level)

Battery Recommended 6S LiPo
8 © 2015 DJI. All Rights Reserved. 

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Frame Arm Weight (Single) 385 g

Cable Length 460 mm

Working Temperature -10 to 60°C

Arm Tube

Length 290 mm

Outer Diameter 25 mm

Wall Thickness 1 mm

ESC

Max Allowable Voltage 26 V

Max Allowable Current (Persistent) 40 A

Signal Frequency 30 to 450 Hz

Battery 6S LiPo

Motor

Stator Size 42×16 mm

KV 310 rpm/V

Weight 205 g

Propeller

Diameter / Thread Pitch 17×6.0 inch

Motor Dimensions

62 mm

52 mm

35 mm

12 mm

18 mm

4×M3 Thread depth 6 mm

 7. Comparison of the S900 Specifications

Specifications Before Upgrading After Upgrading

Frame

Diagonal Wheelbase 900 mm 920 mm

Frame Arm Length 358 mm 368 mm

Frame Arm Weight

(with Motor, ESC, 

Propeller )

316 g 385 g

Motor

Stator Size 41×14 mm 42×16 mm

KV 400 rpm/V 310 rpm/V

Max Power 500 W 700 W
© 2015 DJI. All Rights Reserved. 9

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Propeller Precautions

Check the markers on the screws and propeller covers before every flight. If the 

propellers are loose, the markers will provide a visual cue, indicating that the screws 

should be tightened.

Screws for Foldable Propellers 

(M3×12.5 hexagon)

Screws for Propeller Cover 

(M3×8)

Propeller Washers

 8. FAQ

Remounting the Propellers

1) Use the two foldable propeller mounting screws (M3×12.5 hexagon), the two 

propeller cover mounting screws (M3×8), and the four propeller washers to remount 

the propellers.

2) First apply thread locker to the thread of the propeller mount, then tighten the 

screws until the propeller blades are securely clamped and can rotate freely. 

Loose screws cannot be securely locked in place with thread locker.

Weight (with Cooling Fan) 158 g 205 g

Foldable Propeller

Size 15×5.2 inch 17×6.0 inch

Weight 13 g 23 g

Flight Parameters

Takeoff Weight 4.7 to 8.2 kg 4.7 to 10 kg

Total Weight 3.3 kg 3.7 kg

Max Power Consumption 3000 W 4000 W

Hovering Power 

Consumption

1000 W 

(@ 6.8 kg Takeoff Weight)

770 W 

(@ 6.8 kg Takeoff Weight)

Hovering Time 18 min 

(@ 12000 mAh with a 

6.8 kg Takeoff Weight)

23 min 

(@ 12000 mAh with a 

6.8 kg Takeoff Weight)

Working Temperature - 10 to 40 °C - 10 to 60 °C
EN

© 2015 DJI. All Rights Reserved. 

Assembling Motor Vibration Absorbers

Affix the motor vibration dampers, as shown below. First insert the dampers, then 

tighten the four screws (M3×12 hexagon) on motor base mount. The assembly 

process is identical for both the clockwise and counter-clockwise propellers.

Ensure that all dampers are in good condition before every flight. If they are 

not, they may adversely affect flight performance and should be replaced 

immediately.

The content is subject to change.

Download the latest version from

http://www.dji.com/product/e1200

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

sending a message to DocSupport@dji.com.