The Sensor Hub X8 can be either installed via double side tape, or screwed down to the main frame, by removing the 4 bottom M3 screws and drilling holes into the frame. Then reinstall the screws trough the frame. -> The original screws will be too short, so please replace them with longer ones according your frame thickness.
Connection to external equipment:
1. Connection to Power-Cube:
This connection carries the power supply for the Hub X8 as well as the connected current sensors.
The voltage is 4.95-5.05V and the max. current should not exceed 0.5A.
The current draw of the Hub X8 (with active OLED) is 50mA, plus 8x 15mA (current sensors) = 170mA (0.17A)
So even if we connect 2pcs X8 with 16 current sensors, plus an Hub X2 (15mA), we're still below the 0.5A.
(2 x 0.17A) + 0.015A = 0.335A
2. Sensor connectors:
Please connect here any of PC-xxx sensors. However, all sensors must be of the same current rating !
If you use less than 8 sensors, then it doesn't matter where you connect the sensors.
For more details, please check Pos. (9).
- The 8 cables to connect the PC-xxx sensor boards, come together with the Hub X8 (L=200mm)
- Only PC-xxx sensors can be used. The Hub X8 is not compatible with HS-xxx-xx sensors !
If all 8 possible sensors are installed, but you want to fly your UAV with only 4 LiPo's, then you can deactivate the unused current sensors, by either disconnecting them from the Hub X8, or install a switch into the GND wire of the sensor board.
REM: Please do not install the switch into the + 5V or I-out cable !
If the sensor is disconnected, or the GND wire is switched off, then the Hub X8 will deactivate the sensor input during boot up or restart.
3. Reset / Restart:
If you press the reset switch longer than 2 seconds, then the Hub X8 will restart. This is helpful if you deactivate installed sensors after switching on the system.
It is possible to install an external reset / restart switch (not included), the necessary 5p cable with connector is included.
2x red for external switch + 3x white for alarm relays output.
4. Status LED:
GREEN = After boot up and all connected sensor are initialized / No active alarm
5. Alarm Out:
Pin 4 = NO (normal open)
Pin 5 = NC (normal closed)
Any power LED or buzzer can be connected here, but the max. current should not exceed 1A !
The necessary 5p cable with connector is included. -> 2x red for external switch + 3x white for alarm relays output.
6. External LCD / OLED display:
If the Hub X8 is installed in a place where the display is no more visible, then you can connect here a standard 2x16 LCD display (4 bit data bus), but please do not use any LCD display's with back LED light, as these light's can draw easily more than 200mA and the supplied power from the Power-Cube might be not enough.
You also can install an 2x16 / OLED display. The current draw of these displays are minimal (30mA). -> Internal and External display can be active.
REM: External OLED displays with CFK cover and reset switch might be available soon.
Please check Pos. (7), for how activate / deactivate the internal and external display.
7. Setup DIP switch:
OFF OFF Internal and external display OFF
OFF ON Internal display ON / External display OFF
ON OFF Internal display OFF / External display ON
ON ON Internal and external display ON
S3 S4 S5 S6
ON OFF OFF OFF 50A Sensors (PC-050 Sensors coming soon)
ON ON OFF OFF 100A Sensors
ON ON ON OFF 200A Sensors
ON ON ON ON 400A Sensors (PC-400 Sensors are expected to be available at the end of 2017)
8. I2C connector:
9. Sensor status indicator:
_ = No sensor connected or sensor deactivated -> See Pos. (2)
II = Sensor connected and current is within average.
L = The current of this sensor is at least 25% lower than the average current of the other sensors -> Alarm relay active
H = The current of this sensor is at least 25% higher than the average current of the other sensors -> Alarm relay active
10. Sensor indicator:
11. Current display:
12. Current output and setup MissionPlanner:
For example: 4 x 100A Sensors = 0.0V @ 0A and 3.3V @ 400A -> Amp/Volt value = 120
5 x 200A Sensors = 0.0V @ 0A and 3.3V @ 1000A -> Amp/Volt value = 300
8 x 200A Sensors = 0.0V @ 0A and 3.3V @ 1600A -> Amp/Volt value = 480
Please follow the procedure here to setup the correct Amp/Volt value: http://ardupilot.org/copter/docs/common-mauch-power-modules.html
Standard values for Amp/Volt: