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 u
ser 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.