Description
The KONGSBERG DSU 15 MKII (Part Number 306475) is a high-precision Digital Servo Unit developed for maritime and industrial control applications. This unit serves as an intelligent actuator controller, translating digital command signals into precise mechanical positioning. It is widely utilized in systems requiring exact movement, such as throttle control, valve positioning, and pitch regulation, providing the robust reliability expected in demanding marine environments.
⚙️ Technical Specifications
- Dimensions: 220 mm x 160 mm x 100 mm
- Weight: 1.8 kg
- Country of Origin: Norway
- Supply Voltage: 24V DC
- Operating Temperature: -20°C to +65°C
- Housing: Reinforced, corrosion-resistant metallic enclosure
- Control Interface: High-speed digital bus and analog feedback loop
🏗️ Application Areas
- Maritime Propulsion and Throttle Control
- Automated Valve Positioning Systems
- Rudder and Fin Stabilizer Actuation
- Industrial Mechanical Drive Synchronization
- Pitch and Azimuth Thruster Regulation
📖 Product Usage Instructions
The DSU 15 MKII must be mounted in a stable, low-vibration area to maintain positioning accuracy. Ensure that the mechanical linkage to the actuator is free of play and correctly aligned to prevent excessive motor load. When wiring, maintain a strict separation between power lines and sensitive feedback signal cables to prevent noise interference. Ground the unit casing directly to the control cabinet’s primary earth point.
🌐 Communication Configuration Steps
- IP Address: Connect via the Kongsberg maintenance utility. Access the “Fieldbus Configuration” menu to assign the static IP address and operational network parameters.
- Station Number: Use the physical DIP switches on the side of the unit or the digital configuration menu to set the unique Slave ID for network identification.
- Baud Rate: Match the communication speed (e.g., 500kbps) to your existing control network’s requirements to ensure real-time command processing.
⚡ Power-Up Debugging Flow
- Verify 24V DC power supply stability at the input terminals.
- Ensure the “Enable” signal or safety interlock is satisfied before applying commands.
- Power on the unit; look for the “Ready” status LED to remain solid green.
- If a “Position Fault” or “Feedback Error” LED is active, manually check the mechanical position sensor (potentiometer or encoder).
- Use the Kongsberg diagnostic tool to confirm communication handshake with the master controller.
✅ Initial Run Checklist
- Perform a full-stroke calibration test (from 0% to 100% position) to ensure the unit maps to the mechanical range correctly.
- Monitor motor current draw during movement; spikes may indicate mechanical binding.
- Check the communication bus for any CRC errors or packet losses.
- Secure all terminal wiring and ensure the environmental seals on the enclosure are tight.
- Save the finalized configuration and calibration parameters to your service laptop.
❓ Frequently Asked Questions (Q&A)
Q: What is the “MKII” designation indicating? A: The MKII version provides enhanced processor performance and better electromagnetic interference (EMI) shielding compared to the original model, making it more resilient in high-noise maritime engine rooms.
Q: How do I handle a “Servo Out of Range” alarm? A: This alarm occurs when the physical actuator exceeds the programmed software limits. Check your mechanical end-stops and recalibrate the position sensor limits within the DSU configuration tool.
Q: Can this unit control non-Kongsberg actuators? A: Yes, as long as the actuator matches the electrical and power specifications of the DSU 15 MKII and the feedback signal (e.g., 4-20mA or digital encoder) is compatible.
Q: How do I perform a factory reset? A: A factory reset can be triggered via the service software menu. Note that this will erase all custom calibrations and network settings, requiring a complete re-commissioning of the unit.
