Description
The Kongsberg HA334941B1 is a robust Engine Telegraph Unit (often part of the Autochief or DataChief control series), designed to facilitate reliable communication between the ship’s bridge and the engine control room (ECR). It serves as the primary interface for requesting speed and direction changes. When the bridge officer moves the telegraph lever, the unit generates an electrical signal (or digital data packet) that is transmitted to the engine’s propulsion control system, ensuring the requested maneuver is acknowledged and executed. These units are built to withstand the demanding conditions of a ship’s bridge, featuring backlit scales and high-visibility feedback indicators.
Key Technical Specifications
| Parameter | Value/Description |
| Model Number | HA334941B1 |
| System Compatibility | Kongsberg Autochief / DataChief Propulsion Systems |
| Component Type | Telegraph Transmitter/Receiver Unit |
| Control Logic | Lever-position potentiometer or optical encoder |
| Interface | Serial communication (CanBus/Proprietary) |
| Display | Illuminated scale (Bridge/ECR feedback) |
| Operating Voltage | 24V DC nominal |
| Environment | IP-rated for bridge deck operation (Vibration/Humidity) |
| Feedback | Synchronous “Reply” confirmation loop |
Recommended Related Models
These components are frequently used alongside the telegraph unit to complete the propulsion command chain:
- HA334941B2: Secondary bridge/wing station variant
- 8100292: MPD (Multi-Purpose Display for Thruster/Propulsion monitoring)
- 8100293: DGU (Distributed Governor Unit)
- 8100294: EIU (Engine Interface Unit)
- 8100600: DPU (Distributed Processing Unit)
- 8100183: DPSC (Dual Process Segment Controller)
- 339373: CPU-400 (Central Processing Unit)
- 306712: RMP420 (Remote Multipurpose I/O Module)
- 8100184: PSS (Process Segment Starcoupler)
- 8100289: RPME (Revolutions Per Minute Engine Module)
Important Implementation Note: The HA334941B1 relies on a “handshake” protocol with the engine control system. If the bridge lever is moved but the engine does not acknowledge the command, the issue often lies in the synchronization between the transmitter’s position and the system’s internal mapping. Ensure the unit is properly calibrated; if the potentiometer or encoder feedback drifts over time, the telegraph may report a “Command Mismatch” alarm, preventing the propulsion system from responding.
