Drone Rescue Systems DRS-M600 User manual

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 1/27
Parachute Manual DRS-M600
Version 1.1-EN-Draft B
Drone Rescue Systems GmbH
Austria –Stremayrgasse 16/4
8010 Graz
www.dronerescue.com
[email protected]

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 2/27
1Contents
2Disclaimer ................................................................................................................. 3
3Introduction.............................................................................................................. 4
4Components.............................................................................................................. 5
5Installation................................................................................................................ 7
Install the M600 connector ......................................................................................... 7
Install the motor cut-off PCB....................................................................................... 9
Mount the cords........................................................................................................ 13
Configure the DJI M600............................................................................................. 15
DRS Configuration...................................................................................................... 16
Assembly test............................................................................................................. 16
6Flight........................................................................................................................18
Pre-Flight Inspection.................................................................................................. 18
Loading and unloading the Parachute....................................................................... 18
6.2.1 Put the container under tension........................................................................ 18
6.2.2 Load the Parachute ............................................................................................ 19
Takeoff....................................................................................................................... 21
After flight.................................................................................................................. 22
7Device......................................................................................................................23
Device states and signals........................................................................................... 23
Device Configuration ................................................................................................. 23
System Time............................................................................................................... 24
Firmware Update....................................................................................................... 25
8Specifications ...........................................................................................................26
9Storage ....................................................................................................................27
10 Maintenance............................................................................................................27

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 3/27
2Disclaimer
The information contained in this document is confidential, privileged and only for the
information of the intended recipient and may not be used, published or redistributed without
the prior written consent of Drone Rescue Systems GmbH.
The opinions expressed are in good faith, and while every care has been taken in preparing
these documents, Drone Rescue Systems GmbH makes no representations and gives no
warranties of whatever nature in respect of these documents, including but not limited to the
accuracy or completeness of any information, facts and/or opinions contained therein.
Drone Rescue Systems GmbH, its subsidiaries, the directors, employees and agents cannot be
held liable for the use of and reliance of the opinions, estimates, forecasts and findings in
these documents.
We recommend that you do not fly prior to purchasing liability insurance. This helps cover
costs in the event that persons are hurt or property is damaged as a result of your use of
DRONE RESCUE technology. In general, RC aircrafts are not covered by standard liability
insurance.
Your safety is your own responsibility, including proper use of equipment and safety gear, and
determining whether you have adequate skill and experience. Our products may be
dangerous, unless used properly and with adequate precautions, including safety gear. Our
products are not intended for use by hobbyists or non-professional users.
Warranty will be terminated if parachute is re-packed by yourself.

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 4/27
3Introduction
The DRS-M600 is approved for the DJI M600 series including the professional version (M600
pro) with any additional payload as long as it is operated within the specifications provided by
the manufacturer DJI. It provides the following advantages:
•UAV-independent sensors
•Very light-weighted
•Easy to reuse within minutes
•Visual and acoustical indication signals
•No use of pyrotechnics/explosive components to deploy the parachute
•No use of compressed gas cartridges to deploy the parachute
•Bayonet mechanism to simply attach and detach the whole system
This document will guide you through the system components, installation, configuration and
pre-flight checks as well as possible firmware updates, storage and maintenance
recommendations.

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 5/27
4Components
Table 1 lists all system components. Within the document, parts are linked by their short ID
e.g., container for the carbon container.
Short ID
Picture1
Quantity
Description
Container
1
Carbon container of the DRS system
Container Lid
1
Lid of the container
Parachute
1
Parachute (wrapped in a plastic cover secured
by some rubber bands)
Parachute cord
3
Cords that link the UAV with the parachute
Hook and loop
fastener
3
Long Hook and loop fastener
Hook
1
Brummel hook
Hook
protection
sleeve
1
Protection sleeve for the Brummel hook
Cord box
1
Cord box
1
Depending on the actual DRS configuration, the component pictures in Table 1 may slightly differ
from your system.

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 6/27
Short ID
Picture1
Quantity
Description
Cord box lid
1
Lid of the cord box
DRS M600
connector
1
M600 connector with mounting plate for the
DRS system
Motor cut-off
PCB
1
PCB which cuts the motor's power supply
when the parachute is deployed
Short RC cable
1
Short signal cable for the motor cut-off PCB
Long RC cable
1
Long signal cable for the motor cut-off PCB
Connector-
screw
2
2.5x10mm Torx screw (used to mount the DRS
M600 connector)
PCB-screw
12
3x8mm cylinder head screws
(2.5mm hexagon socket)
Flat washer
6
Flat washers (used to mount the motor cut-off
PCB)
Safety washer
6
Safety washers (used to mount the motor cut-
off PCB)
Table 1 System components

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 7/27
5Installation
Unmount all propellors and detach all batteries and other power supplies before starting the
installation!
Caution:
Mounted propellors may cause injuries or damages.
Caution:
It is mandatory to verify the correct operation with an assembly test right after the
installation! See chapter 5.6 Assembly test for details.
Install the M600 connector
First, you need to install the DRS M600 connector, which will carry the container later, in one
of the five possible positions. There is no general rule which one to use because the
arrangement of superstructural parts like GPS antennas and other equipment can vary
between the different drone models. The key is to find a spot with enough space around it so
that neither the container nor the attached cords will interfere with drone parts. Note that all
cords will rapidly be tautened when the parachute is deployed. No drone parts should be
ripped off in this case.
Each possible spot is right above a battery slot as shown in Figure 1.
Figure 1: Feasible positions for the DRS M600 connector, marked in yellow

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 8/27
Secondly, you need to install a communication cable which is required to allow the remote
pilot in command to manually deploy the parachute via the remote controller. Therefore, a
connection between the DJI A3 flight-controller and the motor cut-off PCB has to be installed.
As an example the port F3 of the A3 flight-controller can be used, but you may choose another
port which is appropriate for your application.
Execute the following steps to install the DRS M600 connector:
•Remove both caps at the top and the bottom of the UAV.
•Choose a position to mount the DRS M600 connector and remove the two screws
within the green marking (see picture below).
•Remove the protection sheet from the adhesive tape on the bottom of the DRS M600
connector
•Place the DRS M600 connector into the chosen spot and use the two connector-screws
included in the DRS accessory to install it. Do not use the original screws because they
are too short.
•Press the DRS M600 connector on the drone to facilitate a good adhesion.
•Install the long RC cable included in the DRS accessory from the A3 flight controller’s
port of your choice (e.g. port F3) through the openings in the center to the bottom of
the UAV (see Figure 2 and Figure 3).

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 9/27
•Feed the cable of the DRS M600 connector through a nearby slit in the M600’s top cap
in order to prevent it from being crimped when the cap is reattached. Then feed it
through the openings in the center to the bottom of the UAV.
•Reattach the top cap.
Install the motor cut-off PCB
The motor cut-off PCB is installed at the UAV’s bottom and is best done with the UAV flipped
over. Consider how to place the UAV without breaking any equipment like GPS antennas.
Place the M600 in a stable upside-down
position and move the landing gear up
manually in order to easily access the
bottom area. Unplug the XT30 socket
which powers the landing gear’s servo.
Remove the bottom cap if not already
done yet.
Figure 2: Long RC cable for manual deployment
Figure 3: Thread the long RC cable all the way through the
drone

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 10/27
Remove the six screws from the
terminals which lock the red (positive)
and black (negative) power supply cables
for the motors as indicated by the red
arrows. Unplug only the red wires and
leave the black ones at its original
position.
Place the motor cut-off PCB in the center
with the white arrow (next to one of the
screw holes) facing into the forward
flight direction. Feed the landing gear
servo’s power supply cable through the
intended hole in the PCB when doing
this. Pay attention not to crimp any
cables between the motor cut-off PCB
and the UAV. All six red power supply
cables, the cable coming from the DRS
M600 connector on the top, and the long
RC cable from the A3 flight controller need to stick out from under the PCB.
Ensure that the screw holes of the PCB
and the UAV’s power distribution board
are aligned. Screw the PCB on and fix the
black wires (negative supply) in their
original positions in doing so. Use six of
the PCB-screws included in the DRS
accessory instead of the original screws.
Also use the delivered flat washers to prevent
damages to the PCB as well as the safety washers to
prevent the screws from loosening through vibrations.
Caution:
The safety washer must be put between the cylinder head of the
screw and the flat washer! Ensure a clean surface of the flat washer's
bottom and the PCB.

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 11/27
Plug the auxiliary power supply cable
coming from the UAV into the motor
cut-off PCB.
Connect the red cables to the appropriate
terminals (cable from motor 1 to M1,
motor 2 to M2, and so on). Use the six
remaining PCB-screws and safety washers
included in the DRS accessory to keep
them locked even under heavy vibrations.
You do not need flat washers this time. Place the
safety washers between the screw's head and the
cable lug as shown in the picture.
Find the RC cable which is installed
between the UAV and the landing gear
servo. Unplug it from the servo and
instead plug it into the motor cut-off
PCB connector labeled with "Landing
gear IN". Take the short RC cable
included in the DRS accessory and wire
it from the PCB's "Landing gear OUT"
connector to the landing gear servo.

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 12/27
Take the loose end of the long RC cable
which was installed in chapter 5.1 and
plug it into the connector labeled with
"Man. Deploy".
Take the loose end of the DRS M600
connector's cable and plug it into the
corresponding socket (labeled "DRS").
Figure 4 shows the motor cut-off PCB after the installation
Figure 4: Overview of the installed M600 motor cut-off PCB

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 13/27
Finally, the landing gear’s servo must be powered by the short cable with the XT30 socket
which is soldered on the motor cut-off PCB. Feed this cable through the bottom cap and
reattach the cap. Pay attention not to crimp any cables. Connect the XT30 sockets of the
landing gear’s servo power supply.
Mount the cords
Make sure the drone is in a stable upside
position. Select three of the six available
arms applying the same consideration as in
chapter 5.1 when the spot for the DRS M600
connector was chosen. Make sure to select
arms, where the cords will not interfere with
mounted GPS antennas or other equipment.
Mount one parachute cord to every second
arm and pull it around close to the hinge.
Thread one end of the cord through the
other end’s loop.
Put a hook and
loop fastener
over each cord,
then fasten it.
After the cords have been tied correctly to
the arms of the M600, thread the ends of all
three cords through the central hole in the
cord box lid. Then push the lid downwards.

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 14/27
Thread the ends of the cords through the
metal hook’s small hole (without the
opening).
Push the cords far enough through the metal
hook to wrap the loops of the cords over the
hook.
Make sure to push the metal hook through
all three loops of the cords.

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 15/27
Pull the metal hook in order to firmly tighten
the knot.
Then pull the lid close to the knot.
Use the adhesive tape to affix the cord box to
the center of the drone with the slots
pointing to the arms with the cords. Push the
cords through the slots of the cord box and
stuff the remaining cords inside. Then clip
the lid on to the cord box.
The finished setup should look like this.
Configure the DJI M600
A PWM signal is used to deploy the parachute manually. The A3 flight controller has to be
configured to generate this signal. The camera trigger on output port F3 is used here as an
example, but you may choose another configuration appropriate for your application.

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 16/27
•Connect the M600 with a PC and use DJI Assistant 2 to configure the output (see DJI
M600 user manual for details).
•In the "Tools" > "Function Channel" menu select “Shutter” as F3 output function.
•In the "Tools" > "Shutter" menu set the “Shutter Trigger PWM” value to 2000
microseconds (this is the PWM level to deploy the parachute).
•Set the “Shutter Default PWM” value to 1000 microseconds (the parachute will not
deploy at this PWM level).
•Set the "Shutter PWM Frequency" to 50 Hz.
•Set the "Shutter PWM Active" to 1000 milliseconds.
DRS Configuration
The DRS System is pre-configured for DJI M600 standard use case application. Fit the
configuration to your specific usage. Configuration is described in chapter 7.2.
Assembly test
Perform this assembly test right after the installation (before the first flight) and after every
50th flight to verify the proper operation of the parachute system. The intention is to test the
engine shutdown and the deployment mechanism without a parachute actually being loaded
in the container. It is necessary to switch on the motors but keep the UAV on the ground
during this test.

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 17/27
Carefully read this chapter to become familiar with the procedure, and execute the steps
afterwards!
•Unmount the propellors
Caution:
Mounted propellors may cause injuries or damages
•Verify that all screws that fix the DRS M600 connector are pulled tight.
•Place the UAV in an upright position in a way that the landing gear is free to move.
•Move the landing gear up (flying position).
•Attach the container and put it under tension as described in chapter 6.2.1. The system
should be strained but not loaded with the parachute after this step.
•Insert a dummy load into the container (e.g., an appropriate bottle filled with water).
Caution:
Triggering (Deploying) an empty container will cause damage to the device!
•Turn on the UAV and perform the usual takeoff procedure until the motors are
spinning but without taking off.
•Verify the correct status of the DRS by observing the LED and the buzzer signals. The
DRS should be in the ARMED MANUAL state.
•Prepare to catch (or at least dodge) the dummy load and trigger the manual
deployment
Caution:
The dummy load might be shot out to some extent, depending on its shape and mass.
Take precautions to prevent it from causing any harm or damage!
•Verify that
▪the motors have been switched off,
▪the dummy load has been deployed,
▪the landing gear has moved down to landing position,
▪the DRS’s buzzer and LED indicate the DEPLOYED state.
All these conditions must be met for a positive test result.
•Turn off the UAV afterwards
Perform these checks after every 50th flight:
•Remove the bottom cap of the DJI M600.
•Verify that all cables are connected tightly.
•Verify that all 12 screws that fix the motor cut-off PCB are pulled tight.
•Verify that all 6 screws that fix the red cables on the sockets M1 to M6 are pulled tight.
•Reattach the bottom cap.

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 18/27
6Flight
Pre-Flight Inspection
To ensure a safe and reliable operation visually check the following components before each
flight:
•No visual damage to the elastic rubber springs of the container or any other
component.
•The screws that fix the mounting plate of the DRS M600 connector are pulled tight.
•The container is fully under tension and the deployment base is at the bottom.
•The parachute is packed in the plastic cover and the rubber bands which secure it have
been removed.
•The parachute is fully loaded inside of the container and no parachute fabric is
protruding.
•The container is rotated to its locked position.
•The parachute is properly linked to the drone with the cords and the hook, and the link
is covered with the hook protection sleeve.
•The cords are stashed inside the cord box and the cord box lid is clipped onto it.
•The container lid is tightly clipped onto the top of the container.
Loading and unloading the Parachute
6.2.1 Put the container under tension
First open the release mechanism of the container,
which is the small shutter at the bottom. The easiest
way to do so is to get your fingernail underneath the
shutter and lift it as far as it will go. When lifted,
place the container on a flat surface and keep the
shutter in this position.

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 19/27
Use a solid object which fits the inner diameter of
the container and is longer than the whole unit. A
plastic pipe is very convenient, but a small bottle of
water works as well. Use it to gently push down the
deployment base until it reaches the bottom
position while holding the shutter. Then release the
shutter and gently push it inside. Now slightly
decrease the pressure on the deployment base until
the shutter snaps into place.
Gently push the shutter back in place until it does
not stick out of the container tube.
Caution:
In case the shutter is not fully back in place
or is manually pulled out, the parachute
will get deployed and might cause injuries
or damages!
6.2.2 Load the Parachute
Remove the rubber bands from the parachute but
keep the plastic cover shut or the parachute will
unfurl.

Parachute Manual DRS-M600_EN
©2021 Drone Rescue Systems GmbH 20/27
Completely insert the parachute into the container
with the jagged edge first.
Check if the parachute fabric is fully covered by the
plastic cover. Pay special attention to the bottom
side.
Caution:
Protruding parachute fabric at any side
might impede a proper parachute
deployment!
Clip on the container lid to protect the parachute
from sunlight and other environmental influences.
The cord of the parachute should lead out
underneath the container lid at its designated
position pointing to the center of the UAV when
mounted.