Head Unit

AirMast Head Unit is a device for controlling the tethered drone.

AirMast Head Unit


  • Compatible with DJI S900 drone and Elistair SAFE-T tethered system
  • Easy mounting and maintenance
  • Built-in 100Mbit Ethernet switch
  • Power outlet for connecting additional payload
  • Battery and flight controller heating
  • Support for DJI gimbal and cameras
  • Extended motor monitoring
  • Embedded ready-to-fly autopilot
  • Intelligent landing gear control
  • Additional tethered specific fail-safe support
  • Controlled by UgCS AirMast Software


General Specifications
Dimensions (case only) 210 x 192 x 78 mm
Dimensions (with GPS mast and bottom board) 210 x 210 x 180 mm
Weight TBD
Operating temperature −10° to +40°C
Storage temperature −20° to +60°C
Electrical Specifications
Power voltage 6S (24V)
Power consumption 25W max.
Available I/O
General purpose interfaces UART, I2C, 4xPWM, RC IN, SPECTRUM
Power outlets +24V, +12V@5A, +5V@5A
LED driver 2x 700 mA
Autopilot interface USB, Ethernet, Wi-Fi
Ethernet ports for payload 2x 100Mbit (one connector with +24V PoE)
Service microcontroller 120 MHz ARM Cortex-M4F

Getting Started

Assembly instructions