Typical Wiring
Incorrect wiring – risk of malfunction/damage to equipment
This section provides a typical wiring diagram. The integrator can modify the configuration of the diagram according to their needs and requirements. Creating the wiring diagram for the end application is the responsibility of the integrator.
Below is the typical scheme for the middle voltage variant of the TX controller, together with the description of the main components.
Powering the signal section from a middle-voltage battery
The controller power stage is rated up to 135 V, while the KEY and POWER supply inputs for the signal section are only rated up to 84 V. Zener diodes are placed in series to provide a fixed voltage drop, chosen so that at maximum power stage voltage, the voltage at the signal inputs does not exceed their rating.
- Zener diodes are connected in parallel solely to increase their combined power rating.
- A 3 A slow-blow fuse should be placed in series with the zeners.
- Power dissipation across the zener diodes can be significant (several watts depending on operating conditions). Monitor their temperature and account for real-world operation.
Main DC fuse
Installing a fuse on the main battery lead is recommended to ensure protection in case of a short circuit on the power circuit. The fuse is typically connected between the battery + terminal and the + lead on the controller side.
The selection of a suitable fuse is the integrator's responsibility. It is recommended that the short-circuit fuse ideally blows within approximately 2 - 3 seconds when the DC current passing through it reaches twice the DC current value for peak power at the specified voltage of the end application.
Main switch
The controller's logic circuit is powered through the KEY pin. In this case, the KEY pin is connected to the battery + through the internal fuse.
The controller is turned ON once the main switch is turned to the "Closed" position (Key and Power connected together) and turned OFF if turned to the "Open" position (Key and Power disconnected). This is usually done by a SPST switch.
The total length of the wires to the main switch should be shorter than 10m.
Motor
A motor with permanent magnets induces voltage (back-EMF) while spinning. This voltage is directly proportional to the motor's revolutions per minute (rpm). When the motor operates beyond its nominal rpm, it is crucial to ensure that the amplitude of the back EMF remains below the non-operational overvoltage limit.
High voltage – risk of personnel injury and/or damage to equipment
In this particular case, the motor is equipped with 3 hall sensors together with the motor winding temperature sensor. The used controller is in the motor sensor variant - 'a'. More technical details can be found in Motor position sensor and Motor temperature sensor chapters.
Throttle
The controller can process a wide range of analog throttles which provide output signal in the range of 0 - 5 V. It can be a potentiometer, hall type or just an analog signal provided by a voltage source.
The controller has also a dedicated +5 V power supply for the throttle. Detailed technical specifications can be found in this chapter.
Servo PWM / PPM input
Servo PWM signals from an RC receiver (or similar source) are captured on dedicated timer-capable pins. The available pins, default channel and constraints depend on the hardware variant — see the PWM/PPM capture input pins channel mapping chapter for your controller.
Application support is required (e.g. the
FALCON application exposes the channel
selection through the in_ppm_ch parameter).
CAN interface
The controller can be a part of the CAN system. CAN interface can be used for commanding the controller or for data exchange between the nodes.
Detailed technical specifications of the CAN interface can be found in this chapter.