7
6
Assembly and connection
Assembly and connection
5
5
5.1
5.3
5.2
Mechanical mounting of the Power Path Module
Ensure that the PPM is well secured to the UAV. It is recommended that the PPM is
mounted using adhesive backed Velcro.
Electrical interfaces
The PPM has 11 electrical connections. These are summarised in the table below.
The PPM is supplied with cables to connect onto the UAV. The FCPMs should be
connected using their supplied cables.
For more detail on Port 7 and 11 see Section 7.2.
Output UART (Port 3)
The communication port is in UART format. This should be fitted in flight to allow
the fuel status and fault statuses to be viewed.
Socket: Manufacturer: JST; Part Number: S8B-ZR-SM4A-TF(LF)(SN)
Plug: Manufacturer: JST; Part Number: ZHR-8
Crimps: Manufacturer: JST; Part Number: SZH-002T-P0.5
Port number
Description
Connect to
When required
1
Output power connection
UAV power input
All cases
2
Output pressure
Regulator control
All cases
3
Output UART
To UAV controller
All cases
4
PPM SD card
NA
All cases
5
Input power
connection FCPM 1
FCPM 1 output
All cases
6
FCPM 1 UART
FCPM 1 UART
All cases
7
FCPM 1 pressure
FCPM 1 regulator interface
If this port is left empty
for dual operation port 11
must be used
8
Input power
connection FCPM 2
FCPM 2 output
All cases
9
Intelligent Energy use only
NA
NA
10
FCPM 2 UART
FCPM 2 UART
All cases
11
FCPM 2 pressure
FCPM 2 regulator interface
If this port is left empty
for dual operation port 7
must be used
Pin number
Description
Comment
1
+3V3
Output Power Rail – not for use
to power external circuits
+3V3
2
UART TX
FCPM UART transmit line (TX) to
connect to external receive (RX) line
UART TX
3
UART RX
FCPM UART receive line (RX) to connect
to external transmit (TX) line
UART RX
4
Not used
Not currently used
N/A
5
Not used
Not currently used
N/A
6
Not used
Not currently used
N/A
7
Not used
Not currently used
N/A
8
GND
GND reference
– GND
Warning
Ensure the correct polarity of the two FCPMs.
Do not connect more than one FCPM debug cable to a computer.
The signals are not isolated. When the FCPMs are connected in series
the ground levels will be different.
Warning
Protect the PPM from direct water spray or water drips.