AVSS PRS-M300 User manual

© 2021 AVSS –ALL RIGHTS RESERVED 1
PRS-M300 for DJI M300 RTK
Version 1.5

PRS-M300 USER MANUAL FOR DJI M300 RTK
© 2021 AVSS –ALL RIGHTS RESERVED 2
Using this Manual
1. Revision Notes
Revision #
Date
Revision Description
1.0
November 1st,
2020
-Initial Internal Release
1.1
February 26th,
2021
-ASTM Revision
-Updated FTS through OSDK
-Updated Specifications
-Updated Attachment Bracket
1.2
April 20th, 2021
-Product Description
-LiPo Battery Information
-ATS MDA
-Arming the Manual Triggering Device
-Terminology
-Initial ASTM Performance Data
1.3
May 6th, 2021
-Final ASTM Performance Data
1.4
May 14th, 2021
-Revised Flight Termination System Firmware
Configuration
1.5
May 22nd, 2021
-Updated Operational Limitations
-Revised Integration Steps
2. Legends
Warning
Important
Tips
Reference

PRS-M300 USER MANUAL FOR DJI M300 RTK
© 2021 AVSS –ALL RIGHTS RESERVED 3
Using this Manual __________________________________________________________________ 2
1. Revision Notes _______________________________________________________________ 2
2. Legends_____________________________________________________________________ 2
Disclaimer _________________________________________________________________________ 5
Terms, Acronyms, & Abbreviations___________________________________________________ 6
Safety Instructions _________________________________________________________________ 7
Limitations ________________________________________________________________________ 8
1. Operational & Environmental Conditions________________________________________ 8
PRS-M300 Overview _______________________________________________________________ 9
1. First Time Setup______________________________________________________________ 9
2. General Use _________________________________________________________________ 9
Features, Specifications, Testing, & Compatibility _____________________________________ 10
1. Features ___________________________________________________________________ 10
2. Specifications_______________________________________________________________ 11
3. Payloads ___________________________________________________________________ 12
Warranty ________________________________________________________________________ 13
What’s in the Box _________________________________________________________________ 14
1. Parts Included ______________________________________________________________ 14
System Overview _________________________________________________________________ 15
1. Parachute Recovery System__________________________________________________ 15
2. Attachment Bracket _________________________________________________________ 16
3. Flight Termination System –Through OSDK____________________________________ 17
4. Manual Triggering Device ____________________________________________________ 18
Installation _______________________________________________________________________ 19
1. Electronic Module ___________________________________________________________ 19
2. Parachute Pod™ ____________________________________________________________ 20
3. Attachment Bracket _________________________________________________________ 21
4. Flight Termination System Firmware Configuration _____________________________ 26
Battery & Charging________________________________________________________________ 34
1. Battery Safety ______________________________________________________________ 34
2. Battery Charging____________________________________________________________ 34
3. Changing Electronic Module Battery___________________________________________ 35
Firmware & SD Card_______________________________________________________________ 36
1. MicroSD Card_______________________________________________________________ 36
2. Firmware Updates __________________________________________________________ 37

PRS-M300 USER MANUAL FOR DJI M300 RTK
© 2021 AVSS –ALL RIGHTS RESERVED 4
Status Indications _________________________________________________________________ 38
1. PRS-M300 Indications _______________________________________________________ 38
2. Manual Triggering Device Status Indication ____________________________________ 39
3. Manual Triggering Device Synchronization_____________________________________ 39
Operating Procedures _____________________________________________________________ 40
1. Hangar Checklist____________________________________________________________ 40
2. Installation Checklist_________________________________________________________ 40
3. Pre-Flight Checklist__________________________________________________________ 40
4. In-Flight Checklist ___________________________________________________________ 41
5. Landing Checklist ___________________________________________________________ 41
6. Post-Flight Checklist (No Deployment)_________________________________________ 41
7. Deployment Checklist________________________________________________________ 41
8. Post-Flight Checklist (With Deployment)_______________________________________ 41
Maintenance & Care_______________________________________________________________ 42
1. Post-Flight (Monthly) ________________________________________________________ 42
2. Transportation______________________________________________________________ 42
3. Storage ____________________________________________________________________ 42
4. Extended Storage Considerations_____________________________________________ 42
Frequently Asked Questions________________________________________________________ 43
Parachute Pod™ Deployment Procedures ___________________________________________ 44
Customer Support_________________________________________________________________ 45
Appendix A: DJI M300 RTK & Payload References ____________________________________ 46

PRS-M300 USER MANUAL FOR DJI M300 RTK
© 2021 AVSS –ALL RIGHTS RESERVED 5
Disclaimer
•This is product has been designed for and should only be used by qualified
professionals only.
1
•This product is designed to increase the safety of both people and property on the
ground during DJI M300 RTK operations while potentially helping DJI M300 RTK
operators meet compliance requirements. However, this product is not a replacement
for safe operating practices and should serve only as a last resort in the event of an
emergency.
•Before use, you shall refer to the DJI M300 RTK manufacturers’ documentation to
determine if this product complies with specific operating requirements and warranty
conditions of the DJI M300 RTK. Failure to comply with the operating requirements of
this product and/or DJI M300 RTK manufacturer product may result in damage to
the DJI M300 RTK, damage to nearby property, harm to bystanders, and/or cause
serious injury.
•Always use proper judgment when attempting to mitigate risks and/or danger in
emergencies. Do not make or attempt any alterations or adjustments to this product
or its use as it could result in serious injury, or damage to the product or other property
and it will void the warranty.
•AVSS –Aerial Vehicle Safety Solutions Inc. (AVSS) assumes no liability and/or
ownership of any failure event that may occur while the system is attached to a DJI
M300 RTK. The use of AVSS products is at the risk of the user.
•Do not store the PRS-M300 and/or any of the associated parts and accessories in
any extreme cold, hot or humid environments.
oLess than 3 months: -20° to +45° C
oMore than 3 months: +22° to +28° C
•This document and the information contained herein are proprietary and commercially
confidential to AVSS. It is prohibited to use, disclose, reproduce, distribute, or use this
user manual other than persons for which purchased the product.
•THIS USER MANUAL MAY BE UPDATED AT ANY POINT
AND WITHOUT NOTIFICATION. BEFORE USE, READ, IN ITS
ENTIRETY, THE MOST RECENT VERSION OF THIS USER
MANUAL TO UNDERSTAND ALL PROCEDURES, RISKS,
AND RESTRICTIONS ASSOCIATED WITH THIS PRODUCT
BEFORE OPERATING.
1
Professional qualifications are determined by the jurisdiction/country in which the commercial DJI M300 RTK is operating.

PRS-M300 USER MANUAL FOR DJI M300 RTK
© 2021 AVSS –ALL RIGHTS RESERVED 6
Terms, Acronyms, & Abbreviations
Terms & Definitions
AGL
Above Ground Level.
ATS
Autonomous Triggering System that is independent of any flight critical
system of the DJI M300 RTK that will detect and initiate parachute
deployment upon detection of a critical failure of the DJI M300 RTK during
flight.
Authorized Dealer
An AVSS approved distribution partner who sells the PRS-M300.
Drone
When referring to a DJI M300 RTK, other relevant terms include Aircraft,
RPAS, sUAS, UAS, and UAV.
End-User
The owner of the PRS-M300 who had purchased the system from an
AVSS Authorized Dealer.
FTS
Flight Termination System is a device that will disable the propulsion
system of the DJI M300 RTK.
IP Rating
Ingress Protection Rating.
LiPo
Lithium-Polymer (Chemistry of battery).
Manual Triggering
Device
The manual triggering device, initiated by pressing the triggering button,
initiates the deployment of the parachute recovery system at the
discretion of the pilot in command.
Minimum
Deployable
Altitude
The lowest altitude at which the PRS-M300 is rated to deploy
successfully.
Parachute Pod™
This refers to the replaceable Parachute Pod™ that contains the
parachute of the AVSS PRS-M300.
Position Mode
The PRS-M300 shall be used only in P-mode (Positioning): P-mode works
best when the GPS signal is strong. The DJI M300 RTK utilizes GPS and
Forward and Downward Vision Systems to locate itself, automatically
stabilize, and navigate between obstacles. Complete details can be found
at www.DJI.com.
PRS
Parachute Recovery System.
Shall
“shall” versus “should” versus “may”, v—use of the word “shall” implies
that a procedure or statement is mandatory and shall be followed to
comply with this specification, “should” implies recommended, and “may”
implies optional at the discretion of the supplier, manufacturer, or
operator.

PRS-M300 USER MANUAL FOR DJI M300 RTK
© 2021 AVSS –ALL RIGHTS RESERVED 7
Safety Instructions
Recommendations
Eye Protection
As with any system designed to launch a mass at high velocity,
precautions shall be taken to prevent potential injury.
Never point the
Parachute Pod™
towards anyone or
anything
While the PRS-M300 includes features to prevent unintentional
deployments, users shall be aware that the Parachute Pod™ is
launched vertically. It is recommended that the operator maintains a
clear area of at least 5 meters after the system has been powered.
Disarming Manual
Trigger Device
Always disarm the Manual Trigger Device before approaching the DJI
M300 RTK after a landing or in the event of an aborted takeoff.
Ensure PRS-M300
is DISARMED
before moving it
Do not pick up the PRS-M300 when it is armed because the sensors
may interpret the movements as an in-flight failure. Wait five to ten
seconds for the Autonomous Trigger System to disarm.
Error Status
The system should not be used unless it is indicated that no errors are
present. The system will not arm itself nor deploy in a failure scenario
unless it has initialized successfully.
Low Battery
The PRS-M300 requires enough battery power to operate. Although
the PRS-M300 can draw power from the DJI M300 RTK as a backup if
the battery becomes low during a flight, this feature is not to be used
as a substitute for charging the battery prior to flight.
Parachute Pod™
Repacking
Only parachutes packed by AVSS are compliant. The Parachute Pod™
shall be repacked or replaced annually only by AVSS. You will no
longer be compliant and will void the warranty if you attempt or repack
the Parachute Pod™.
Payload
Configuration
Always follow DJI’s maximum specified takeoff weight when adding
payloads to the DJI M300 RTK (See Compatibility & Payloads sub-
section for a list of compatible payload configurations).
Position Mode
The Autonomous Triggering System is designed to automatically
detect abnormal flight behaviors. Flying in a controlled manner and
avoiding erratic maneuvers ensures that the PRS-M300 can more
accurately distinguish between pilot commands and loss of control.
This is best accomplished by flying in Position Mode.
Rules and
Regulations
Pilots shall follow the rules and regulations put in place by civil aviation
or government bodies in their operating regions.
Li-Po Battery
Warning
The PRS-M300 utilizes Li-Po batteries. Li-Po batteries are volatile and
can cause fires. The user must take the necessary precautions when
charging the PRS-M300.

PRS-M300 USER MANUAL FOR DJI M300 RTK
© 2021 AVSS –ALL RIGHTS RESERVED 8
Limitations
1. Operational & Environmental Conditions
-DJI M300 RTK Flight Mode = Position Mode
-Maximum Take Off Weight = 9.20 kg (20.28 lbs)
-Minimum Deployable Altitude at 7.70 kg = 44.6 m (146.33 ft)
-Minimum Deployable Altitude at 9.20 kg = 50.8 m (166.67 ft)
-Autonomous Triggering System Arming Height = 43 m (141.08 ft)
-Manual Triggering Device Range = <2 km (<1.24 mi)
-Temperature Range = -20°C to +45°C (-4°F to 122°F)
-Maximum Wind Resistance = 15 m/s (49.21 fps)
ONLY FLY THE PRS-M300 IN POSITION MODE.
IF YOU UPDATE THE FIRMWARE ON THE DJI M300 RTK, ALL
EXISTING PRS-M300 OSDK SETTINGS WILL BE REMOVED.
THEREFORE, AFTER COMPLETING A FIRMWARE UPDATE, YOU
MUST PERFORM THE FIRST TIME & AFTER FIRMWARE UPDATES
PROCEDURES (SEE “FIRST TIME USE & AFTER FIRMWARE
CONFIGURATION” SECTION)
IF THE PARACHUTE IS DEPLOYED IN HIGH WINDS, THE
PARACHUTE CAN DRIFT. THE PILOT MUST CONSIDER DRIFT
ZONES AND THE CONSEQUENCES IN THEIR RISK ASSESSMENT.
LEAVING THE PRS-M300 ON FOR A PROLONGED PERIOD
BEFORE TAKING OFF CAN CAUSE IT TO ARM IF ENVIRONMENTAL
CONDITIONS ARE CHANGING (E.G., BAROMETER DRIFT).
IF THE PRS-M300 IS INVOLVED IN A MAJOR CRASH, DO NOT
REUSE THE PRS-M300 WITHOUT CONTACTING AVSS’S
CUSTOMER SUPPORT AND SPEAKING WITH A
REPRESENTATIVE BEFORE THE NEXT FLIGHT.

PRS-M300 USER MANUAL FOR DJI M300 RTK
© 2021 AVSS –ALL RIGHTS RESERVED 9
PRS-M300 Overview
The PRS-M300 is composed of five (5) main components:
1. The Electronics Module, which houses the battery, sensors, radio, and controller. These
electronics also control the autonomous triggering system that will deploy the parachute.
2. The swappable Parachute Pod™, which contains a compressed spring and a folded
parachute.
3. The Flight Termination System Module, a cable adapter and module that enables the
Electronics Module to communicate with the DJI M300 RTK’s OSDK for motor shutoff.
4. The Bracket, which attaches the PRS-M300 to the DJI M300 RTK and allows for easy
removal.
5. The Manual Triggering Device, which allows the user to manually initiate a parachute
deployment when desired by pressing on the red triggering button.
1. First Time Setup
When the user receives the product, the Electronics module comes mounted to the top plate
of the bracket with a Parachute Pod™already attached. For a first-time installation, the user
must remove the landing gear brackets on the DJI M300 RTK, place an aluminum spacer block
in between and remount the landing gear bracket with the longer bolts that are provided by
AVSS. This spacer block can stay permanently attached to the aircraft and ensures that the
DJI M300 RTK can still fit in the official DJI M300 RTK supplied hard case. The user must then
enable the OSDK on the DJI M300 RTK to allow the FTS to work, which is done using DJI
Assistant software.
2. General Use
To use the PRS-M300 for a flight, the DJI M300 RTK can be unpacked from its case and set
up according to DJI’s user manual. Once the aircraft is in its flight configuration, the AVSS
bracket can be mounted to the DJI M300 RTK. The bracket side plates connect and lock into
the spacer blocks. The bracket top plate which already has the electronics module and
Parachute PodTM attached can then be mounted and locked in place using a combination of
a sliding motion and quarter turn fasteners. The provided FTS Module can then be plugged
into the OSDK port on the DJI M300 RTK and connects to the electronics module using the
provided cable that features locking connectors. The PRS-M300 is now fully installed. The
PRS-M300 will turn on automatically when the DJI M300 RTK is turned on. The manual
triggering device is turned on by the user to ensure that it is communicating with the PRS-
M300. The manual triggering device has a secondary arm button that must be held down for
two (2) seconds to arm the manual triggering device before the parachute can be manually
deployed. Any error with the PRS-M300 will be communicated to the user via the manual
triggering device in the form of verbal warnings and a status LED. During the flight, the PRS-
M300 Autonomous Triggering System will arm itself only once it has reached the minimum
deployable barometric altitude. Afterward, if the DJI M300 RTK experiences a failure, using a
combination of accelerometer, gyro, and barometer data, the Autonomous Triggering System
detects the failure, forces the motors to shutoff, and deploys the parachute without the need
for pilot input. If the DJI M300 RTK experiences a flyaway, loss of communication, or other
undesirable behavior, the pilot can manually trigger the parachute deployment to safely
recover the aircraft.

PRS-M300 USER MANUAL FOR DJI M300 RTK
© 2021 AVSS –ALL RIGHTS RESERVED 10
Features, Specifications, Testing, & Compatibility
The PRS-M300 has been designed to easily integrate with DJI Matrice 300 RTK DJI M300
RTK. The attachment bracket secures the PRS-M300 without interfering with onboard
sensors and can be easily removed for transport. The system includes an electronic module
to power the Parachute Pod™ and flight termination system. The flight termination system
is initiated when either the pilot instigates a deployment through the manual triggering
device or when the Autonomous triggering system, using the onboard sensors located in
the electronic module, determine that the DJI M300 RTK has breached the safe flying
parameters. Once the flight termination system is initiated and stops the motors from
spinning, the Parachute Pod™ is deployed and will result in the DJI M300 RTK descending
under a fully inflated parachute.
1. Features
Attachment
Bracket
The custom mounting bracket allows the PRS-M300 to be easily
installed with minimal effort.
Independent
Power Source
The PRS-M300 is equipped with an independent power source that
allows the system to deploy if the DJI M300 RTK loses power.
Spring-Based
Ejection
A high-energy spring is used to eject the parachute. This non-
pyrotechnic system is safe for travel on commercial airlines.
Autonomous
Trigger System
The Autonomous Triggering System (ATS) automatically detects
failures and triggers the parachute release.
Manual
Triggering
Device
The manual triggering device can initiate deployment of the
parachute recovery system at the discretion of the remote pilot in
command.
Flight
Termination
System
Plug-and-play system that cuts power to the motors in the event of
a failure and to ensure that the parachute does not become
entangled in the DJI M300 RTK’s propellers.
Audible Buzzer
An audible buzzer on the DJI M300 RTK will attempt to notify
bystanders that the PRS-M300 has deployed and the DJI M300
RTK is descending.
Low Descent
Rate
The parachute is designed to greatly reduce the descent velocity of
the DJI M300 RTK in the event of a failure.
Flight Data
Logging
Flight data logging to a dedicated microSD Card that is integrated
in the PRS-M300.
Parachute
Pods™
Easily replaceable Parachute Pod™.

PRS-M300 USER MANUAL FOR DJI M300 RTK
© 2021 AVSS –ALL RIGHTS RESERVED 11
2. Specifications
OVERVIEW2
Total Weight
922 grams (2.03 lbs)
Average Descent Rate (7.70 kg)
3.24 m/s (10.62 fps)
Average Descent Rate (9.20 kg)
3.54 m/s (11.61 fps)
Average Impact Energy (7.70 kg)
40.30 Joules (29.80 ft-lb)
Average Impact Energy (9.20 kg)
57.60 Joules (42.50 ft-lb)
Minimum Deployable Altitude (7.70 kg)
44.60 meters (146.33 ft)
Minimum Deployable Altitude (9.20 kg)
50.80 meters (166.67 ft)
Parachute Reuse Method
Prepacked Pods
Deployment Technology
Spring
Deployment Trigger
Manual and/or Autonomous
PARACHUTE RECOVERY SYSTEM
Main System Weight
650 grams (1.43 lbs)
Deployment Release Time
20 ms
Time to Inflation
0.57s to 1.30s
Battery Life
6 hours
Operating Temperature
-20˚C to +50˚C (-4°F to 122°F)
PARACHUTE POD™
Parachute Size
5.5m²
Risers/Attachment Location
Internal
FLIGHT TERMINATION SYSTEM
FTS Method
OSDK
Integration Process
OSDK Port
ATTACHMENT BRACKET
Attachment Bracket Weight
272 grams (0.60 lbs)
Material
Carbon Fibre
Attachment Location
Top Mounted
Manual Triggering Device
Range
<2 km (<1.24 mi)
Frequency
915MHz (North America) / 868MHz (Europe)
2
Subject to change without warning based on supply chain material availability, payload selection, ongoing testing results,
and environmental conditions.

© 2021 AVSS –ALL RIGHTS RESERVED 12
PRS-M300 USER MANUAL FOR DJI M300 RTK
3. Payloads
AVSS’s PRS-M300 typically works with the various DJI M300 RTK payload options that are provided by DJI and that have been
developed to integrate through the DJI OSDK Port. As of 2020-10-01, the following payload combinations, if using the user
manual data located on DJI’s and payload partners’ website
3
, are within the 9.0kg Maximum Take-Off Weight criteria. Be aware,
due to the potential unannounced changes by the supporting DJI M300 RTK and payload manufacturers, these charts are subject
to change without any notification. The user is solely responsible for verifying the weight inaccuracies and calculating the weight
of additional items attached to the DJI M300 RTK.
Single Payload Configuration Chart
Single Payload (KG)
Drone
Battery
H20
H20T
Z30
XT S
XT2
U10
Methane
Z15
0.686
0.833
0.556
0.387
0.629
0.534
.500
DJI M300 RTK
TB60
7.908
8.055
7.778
7.609
7.851
7.756
7.722
Available Weight (MaxTOW 9kg)
1.092
0.945
1.222
1.391
1.149
1.244
1.278
Dual Payload Configuration Chart
Dual Payload (KG)
Drone
Battery
H20T +
Z30
H20T +
XT S
H20T +
XT2
H20T +
U10 Methane
H20T +
Z15
1.389
1.220
1.462
1.367
1.333
DJI M300 RTK
TB60
8.611
8.442
8.684
8.589
8.555
Available Weight (MaxTOW 9kg)
0.389
0.558
0.316
0.411
0.445
3
Please refer to Appendix A: Drone & Payload References for the complete list of references.

© 2021 AVSS –ALL RIGHTS RESERVED 13
PRS-M300 USER MANUAL FOR DJI M300 RTK
Warranty
•AVSS warrants that the PRS-M300 and its accessories are free from defects and
fit for the operational purpose intended.
•The warranty period for the PRS-M300 is, the earliest of, twelve (12) months after
purchase, or after three Parachute Pod™ deployments, which starts on the date
listed as per the user’s invoice from an Authorized Dealer.
•This warranty requires the PRS-M300 to be shipped to AVSS’s location for analysis
and may either be fixed, replaced and/or deemed voided of warranty at the sole
discretion of AVSS.
•If the customer believes the PRS-M300 did not properly function or deployed the
Parachute Pod™ in a non-failure event (False-Positive), the customer must send
AVSS the following files:
▪PRS-M300 Data
▪DJI M300 RTK DAT data
▪DJI M300 RTK Text File
•If the PRS-M300 is deemed void, the cost of analysis and shipping shall be the
responsibility of the end-user. Nothing herein contained shall be construed to
exclude or limit any warranty, express or implied by law.
•AVSS hereby declares that the warranty shall be deemed void if the PRS-M300 is
not used for the intended operational uses and/or if alterations, tampering, or any
actions deemed comprising by AVSS, directly or indirectly, of the PRS-M300 This
includes, but not limited to, non-standard use, the use of potentially disabling anti-
operations technology, and/or unintended damage by the end-user.
•The manual triggering device for the parachute is warrantied against any
manufacturing defect.
•The product warranty does not cover water damage.
•If the product is used or handled in any way otherwise described within this user
manual, the warranty shall be void.
•The PRS-M300 purpose is to assist in decreasing the ground impact energy caused
by the DJI M300 RTK mid-flight failure. The end-user cannot in any circumstances
from AVSS pursue any compensation or allowance if their DJI M300 RTK is
damaged.
•It is the responsibility of the purchaser to contact AVSS to obtain additional or
updated copies of the user manual.

© 2021 AVSS –ALL RIGHTS RESERVED 14
PRS-M300 USER MANUAL FOR DJI M300 RTK
What’s in the Box:
1. Parts Included
A. Parachute Pod™
G. FTS OSDK Module
B. FTS Connector
H. HR30 FTS Cable
C. Electronic Module
I. Manual Trigger Device with
Battery
D. Top Plate
J. Allen Keys
E. Side Brackets (2)
K. USB-C to USB-A Cable
F. Bracket Leg Connectors (2)
L. M6 Bolt and Washer (2)
A
B
C
D
E
F
G
L
H
J
K
I

© 2021 AVSS –ALL RIGHTS RESERVED 15
PRS-M300 USER MANUAL FOR DJI M300 RTK
System Overview
1. Parachute Recovery System
A. Parachute Pod™
F. Firing Pin Receptacles
B. Electronic Module
G. Orientation Key
C. MicroSD Dust Cap for the
USB/microSD Card Slot
H. Battery Door
D. Status LED
I. Electrical Contacts
E. Power Button
J. Continuity LED
K. HR30 FTS Connector
C
E
A
B
D
F
G
H
I
J
K

© 2021 AVSS –ALL RIGHTS RESERVED 16
PRS-M300 USER MANUAL FOR DJI M300 RTK
2. Attachment Bracket
A. Top Plate
B. Quarter Turns (2)
C. Side Plates (2)
D. Landing Gear Screws (8)
E. Bracket Leg Connectors
A
B
E
C
D

© 2021 AVSS –ALL RIGHTS RESERVED 17
PRS-M300 USER MANUAL FOR DJI M300 RTK
3. Flight Termination System –Through OSDK
A. FTS OSDK Module
D. HR30 FTS Cable to
Electronic Module
Connector
B. HR30 FTS Cable Female
Connector
E. HR30 FTS Cable to FTS
Connector
C. USB-C Connector to DJI M300
RTK OSDK Port
A
B
C
D
E

© 2021 AVSS –ALL RIGHTS RESERVED 18
PRS-M300 USER MANUAL FOR DJI M300 RTK
4. Manual Triggering Device
A. Triggering Button
F. Status LED
B. Antenna
G. Power Button
C. Lanyard Attachment
H. Sync Button
D. Belt Clip
I. USB-C Charging Port
E. Arm Button
A
B
C
E
D
G
H
I
F

© 2021 AVSS –ALL RIGHTS RESERVED 19
PRS-M300 USER MANUAL FOR DJI M300 RTK
Installation
ENSURE BOTH THE PRS-M300 AND DJI M300 RTK ARE OFF
DURING INSTALLATION UNLESS REQUIRED FOR COMPLETING
THE STEP.
1. Electronic Module
Turning on the PRS-M300
Step 1
Turn on
System
To turn on PRS-M300, press on the
ON/OFF switch.
Synchronization on PRS-M300
Step 1
Press and
Hold Sync
Button
To synchronize the PRS-M300,
ensure the PRS-M300 is OFF. Next,
pull the tab on the microSD dust
cap cover to open it. Then, press
and hold the small blue
synchronization button in the top
corner.
Step 2
Turn On
PRS
While holding the button, turn ON
the PRS. The Main status LED
should turn white after a moment.
Step 3
Turn On
Remote
Turn on the manual remote while
holding the sync button that is
located next to the power button.
The LED on the remote will turn
white.
Step 4
Syncing
Once both the PRS and remote are
on and in the sync mode (white
LED), they will pair. The remote will
indicate that the pair is connected
and the status LED on both the PRS
and the remote will green. The PRS
and remote are now bound. They
can now be turned off.

© 2021 AVSS –ALL RIGHTS RESERVED 20
PRS-M300 USER MANUAL FOR DJI M300 RTK
2. Parachute Pod™
•ONLY REMOVE THE PARACHUTE POD IF THE
PARACHUTE HAS BEEN DEPLOYED.
•ENSURE THAT THE PRS-M300 IS OFF BEFORE
REPLACING THE POD.
Attaching and changing the Parachute Pod™
Step
1
Remove
Parachute
PodTM
from
PRS-
M300
Using the supplied hex key, unscrew the M6
bolt until the pod can be removed. Do not reuse
the bolt and washer when attaching a new
Parachute Pod™.
Step
2
Align
New
Parachute
PodTM
Remove the new Parachute Pod™ from its
shrink wrap packaging. Align the Parachute
PodTM above the electronics module such that
the electrical contacts will mate properly (as
shown).
Step
3
Press
Parachute
PodTM
Against
Module
Press the Parachute PodTM against the
electronics module. The two shall mesh so that
they do not slide against each other.
Step
4
Slide
Washer
onto M6
Bolt
Take a new M6 bolt and slide on a new
washer. The washer is slightly cone shaped.
Ensure that the narrow end is towards the
head of the bolt.
Step
5
Tighten
Bolt
Using the M5 hex key, tighten the bolt.
Step
6
Power On
Place the PRS-M300 on a flat surface and turn
on.
Step
7
Check
Continuity
Check that the continuity light on the side of
the PRS-M300 is lit. This indicates that the
electrical contacts are properly connected to
the pod.
Step
8
Power Off
Power off the module. The new Parachute
PodTM is now successfully installed.