PRS-M350(EX) USER MANUAL FOR DJI M350 RTK
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PRS-M350 Overview
The PRS-M350 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 M350 RTK’s PSDK for motor shutoff.
4. The Bracket, which attaches the PRS-M350 to the DJI M350 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 M350 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 M350 RTK can still fit in the official DJI M350
RTK supplied hard case. The user must then enable the PSDK on the DJI M350 RTK to allow the FTS to
work, which is done using DJI Assistant software.
2. General Use
To use the PRS-M350 for a flight, the DJI M350 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 M350 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 PSDK port on the DJI M350 RTK and connects to the electronics
module using the provided cable that features locking connectors. The PRS-M350 is now fully installed.
The PRS-M350 will turn on automatically when the DJI M350 RTK is turned on. The manual triggering
device is turned on by the user to ensure that it is communicating with the PRS-M350. 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-M350
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-M350 Autonomous Triggering System will arm itself only once it
has reached the minimum deployable barometric altitude. Afterward, if the DJI M350 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 M350 RTK experiences a flyaway, loss of communication, or other undesirable
behavior, the pilot can manually trigger the parachute deployment to safely recover the aircraft.
Features, Specifications, Testing, & Compatibility
The PRS-M350 has been designed to easily integrate with DJI Matrice 350 RTK (DJI M350 RTK). The
attachment bracket secures the PRS-M350 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
