Central control unit for bow thruster AHD 418

fixed pitch propeller

Central control unit for fixed pitch propeller bow thruster

Product Features

  • Profile module for installation on standard profile rails in consoles, control panels or control cabinets
  • Degree of protection IP 20
  • Weight approx. 0.7 kg
  • Power supply 24 V DC +30%/-25%
  • Current consumption max. 0.3 A
  • Serial communication with up to 4 control units AHD 419
  • Direct control of direction, stage and interstage contactors including feedback monitoring
  • Control of 3 main stages (70%, 85%, 100%) and up to 6 interstages
  • Fan control and monitoring
  • Monitoring of motor current and of winding temperatures in the motor
  • Monitoring of oil level of motor
  • Check of contactor control voltage (circuit breaker)
  • Controllable direct-locking of 100-percent-stage
  • High rating of relay for contactor control; the demand for auxiliary contactors is only required in exceptional cases
  • Integrated LED-status indications for all in and outputs, as well as most important alarms (over current and excess temperature) in central unit AHD 418
  • Type approved by Germanischer Lloyd, Lloyd´s Register of Shipping and Bureau Veritas (further approvals on demand)


The central unit AHD 418 is a microprocessor-controlled device comprising all required in and outputs for control and monitoring of the power section of a bow thruster, consisting of a 3-phase-asynchronous motor (slip-ring rotor) with fixed propeller. The central unit is installed in power section resp. in the control cabinet of the bow thruster.

Drawings and photos AHD-418

Back to top