Raymarine ACU-300 Actuator Control Unit for Solenoid Controlled Steering Systems
Professional Autopilot Control Unit for Constant Running Hydraulic Pump Systems
Power your professional autopilot system with the Raymarine ACU-300 Actuator Control Unit – the essential control interface designed specifically for solenoid-controlled steering systems and constant running hydraulic pumps. This robust control unit delivers the precise power management and system integration needed for reliable autopilot operation on larger vessels and commercial applications.
Engineered for demanding marine environments, the ACU-300 serves as the central nervous system of your Evolution Series autopilot, providing both drive power and SeaTalkng network power while maintaining the precision control required for professional marine applications.
Professional Autopilot System Integration
Core Control Functions
Houses main power and drive electronics for direct solenoid control connection. Delivers up to 5 amperes continuous drive current for reliable steering system operation.
Network Power Management
Provides 3-amp fuse-protected power to the SeaTalkng bus, enabling comprehensive system integration with Raymarine navigation electronics.
Complete System Components
Combines with EV-1 sensor, autopilot control head, and solenoid-controlled drive system to create a professional-grade autopilot solution.
Technical Specifications
Power & Electrical
- Supply Voltage: 12V or 24V DC
- Operating Range: 10.8V to 31.2V DC
- Maximum Continuous Drive: 5 amperes at supply voltage
- SeaTalkng Power Output: 3 amperes at 12V (fuse protected)
- Standby Consumption: 300mA (12/24V), 20mA SeaTalkng
Physical Specifications
- Dimensions: 285mm × 211.5mm × 64.5mm (11.2" × 8.3" × 2.5")
- Weight: 2.2kg (4.84 lbs)
- Waterproof Rating: Drip resistant for below-deck installation
- Construction: Marine-grade housing for harsh environments
Environmental Specifications
- Operating Temperature: -20°C to +55°C (-4°F to +131°F)
- Storage Temperature: -30°C to +70°C (-22°F to +158°F)
- Relative Humidity: Maximum 93%
- Installation: Suitable for below-deck marine environments
System Connections & Integration
Included M81105 Rotary Rudder Reference
Precision rudder feedback sensor provides accurate rudder position data for optimal steering performance and system calibration.
Solenoid Drive Interface
Direct connection to solenoid drive out/return for seamless integration with hydraulic steering systems using constant running pumps.
SeaTalkng Network Integration
Full SeaTalkng compatibility with LEN (Load Equivalency Number) of 1, ensuring proper network integration with other Raymarine devices.
Power & Control Connections
Dedicated connections for main power, ground, and sleep switch enable comprehensive system control and power management.
Steering System Compatibility
Solenoid-Controlled Systems
Designed specifically for steering systems using solenoid valves to control hydraulic flow direction. Ideal for vessels with electrohydraulic steering systems.
Constant Running Hydraulic Pumps
Optimized for Raymarine constant running hydraulic pump systems, providing precise control and reliable operation for professional applications.
Evolution Series Integration
Seamlessly integrates with Evolution Series autopilot components including control heads, sensors, and network devices.
Professional-Grade Features
- Proven Reliability: High-performance electronics tested in the harshest marine environments
- Extended Durability: Built-to-last construction ensures longer operational life
- Network Power Supply: Eliminates need for separate SeaTalkng power supply
- Sleep Function: Dedicated sleep switch connection for system standby mode
- Wide Voltage Range: Operates reliably from 10.8V to 31.2V DC for various vessel electrical systems
Installation Requirements
Location Requirements
Below-deck installation in dry, ventilated area. Drip-resistant rating suitable for typical below-deck marine environments.
System Components
Requires EV-1 sensor, compatible autopilot control head, and solenoid-controlled drive system for complete autopilot functionality.
Electrical Connections
Professional installation recommended for proper electrical connections, SeaTalkng network integration, and system calibration.
Ideal Marine Applications
Commercial Vessels
Professional-grade performance for commercial fishing vessels, charter boats, and workboats requiring reliable autopilot operation.
Large Recreational Vessels
Ideal for larger recreational vessels with hydraulic steering systems, providing precise course-keeping for extended cruising.
Offshore Applications
Reliable autopilot control for offshore vessels requiring precise navigation and course-keeping in challenging sea conditions.
System Upgrades
Perfect for upgrading existing solenoid-controlled steering systems to modern Evolution Series autopilot technology.
Frequently Asked Questions
What steering systems are compatible with the ACU-300?
The ACU-300 is specifically designed for solenoid-controlled steering systems and constant running hydraulic pumps. It's not compatible with linear drives or other steering system types.
Does the ACU-300 require separate SeaTalkng power?
No, the ACU-300 provides 3-amp fuse-protected power to the SeaTalkng network, eliminating the need for a separate power supply for the autopilot system network.
Is the M81105 Rotary Rudder Reference included?
Yes, the ACU-300 includes the M81105 Rotary Rudder Reference sensor, providing accurate rudder position feedback for optimal autopilot performance.
What other components are needed for a complete autopilot system?
You'll need an EV-1 sensor core, an Evolution Series control head, and a compatible solenoid-controlled drive system. Professional installation and system calibration are also recommended.
Can the ACU-300 work with both 12V and 24V systems?
Yes, the ACU-300 automatically adapts to both 12V and 24V DC systems, operating reliably across the full voltage range from 10.8V to 31.2V DC.
Regulatory Compliance & Certifications
The ACU-300 meets international marine electronics standards:
- European Compliance: 2004/108/EC certification
- Australia/New Zealand: C-Tick Compliance Level 2
- Marine Standards: Built to withstand harsh marine environments
- EMC Compliance: Electromagnetic compatibility for interference-free operation
Professional Support & Warranty
Backed by Raymarine's comprehensive 2-year limited warranty and global network of authorized service centers. Professional installation and system integration support available through certified marine electronics dealers.
