ACU-300 Evolution autopilot actuator control unit

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Raymarine

E70139

ACU-300 Power Drive Unit

The Raymarine ACU-300 power drive (E70139) is a control unit for the Evolution autopilot, designed to manage constant-flow hydraulic drive units. It integrates with the SeaTalkng network and provides precise rudder control for vessels equipped with specific hydraulic steering systems, with a rudder limit set to 30 degrees for this type of pump. This product is a core component of Raymarine's Evolution system.

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£1,716.89 GBP

£1,716.89 GBP ~~£1,896.14 GBP~~

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In stock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Technical specifications

Typical power consumption	3.6 W
NMEA 2000 Load Equivalency Number (LEN)	1 LEN
Operating voltage	12 V or 24 V DC
Operating temperature	-20°C to +55°C
Recommended fuse rating	30 A
Product width	211.4 mm
Product height	284.9 mm
Product depth	156.5 mm
Bus compatibility	NMEA 2000, SeaTalkng
Wired network	SeaTalkng
Mounting type	Wall mounting
Certifications	CE
Steering modes	Auto, Standby, Wind, Nav
Drive unit type	Constant-flow hydraulic pumps (Type 1, Type 2, Type 3)
Dual rudder support	Yes
NMEA 0183 ports	0
Storage temperature	-30°C to +70°C
Browser-based setup	No
Motion correction support	Yes (via EV-1 sensor)
Alarm output	Via SeaTalkng network
Update rate	10 Hz (for heading data from the Evolution system)

Detailed description

The Raymarine ACU-300 power drive unit (E70139) is an actuator control unit designed for Raymarine Evolution autopilot systems. It manages power and control for constant-flow hydraulic drive units, ensuring seamless integration with the SeaTalkng network. The ACU-300 is part of the Evolution range, complementing the EV-1 sensor and p70/p70s/p70R/p70Rs control heads to provide a complete steering solution.

Integration and compatibility

This power drive unit is specifically designed for Type 1, Type 2, and Type 3 hydraulic drives, as well as constant-flow pumps. Unlike the ACU-100 and ACU-150, which are intended for lower-current systems or mechanical drives, the ACU-300 is sized for higher power requirements. It integrates with the Evolution system, which also includes the ACU-200 and ACU-400, the latter dedicated to high-power electromechanical or hydraulic rams. The Raymarine ACU-300 thus offers a targeted solution for vessels equipped with advanced hydraulic steering systems.

Technical specifications and installation

With dimensions of 211.4 mm (width), 156.5 mm (depth), and 284.9 mm (height), the Raymarine ACU-300 power drive unit is built for robust installation. Its SeaTalkng connectivity simplifies data and power integration into the onboard network. The commissioning process includes a control head setup assistant for selecting hull type (sail, power, catamaran) and drive type, ensuring optimized steering performance. For systems using a constant-flow pump, the rudder limit is set to 30 degrees.

Documentation

Type	Nom
	EN - Technical Drawing - ACU-300 Power Unit
	EN - Notice d'installation - Boîtier de puissance ACU-300
	EN - Technical Document - ACU-300 Power Unit
	FR - Notice d'installation - Boîtier de puissance ACU-300
	EN - Declaration of Conformity - ACU-300 Power Unit
	EN - Declaration of conformity - ACU-300 power box
	EN - Declaration of Conformity - ACU-300 Power Unit
	EN - Mounting template - ACU-300 power housing
	EN - Mounting template - ACU-300 power unit

Expert opinion

Pol CONIN

Digital Manager

« Raymarine ACU-300: Control of constant-flow hydraulic systems »

The Raymarine ACU-300 power unit is a critical component for Evolution autopilot systems, particularly on vessels equipped with hydraulic steering. Its key feature is its ability to control constant-flow hydraulic pumps, distinguishing it from ACU-100/150 units (for lighter drives) and ACU-200/400 units (for proportional rams or more powerful pumps). This model is therefore the technically appropriate choice for integration with existing hydraulic steering systems using this type of pump.

Installation requires careful attention to the power wiring for the hydraulic pump, in addition to the SeaTalkng network connection. Configuration via the p70/p70s control head is intuitive thanks to the assistant, but precise selection of the drive type and hull type is crucial for autopilot performance. It is important to note that for constant-flow pumps, the rudder limit is set to 30 degrees, which may affect maneuverability on some vessels. This unit is ideal for recreational sailors and professionals seeking a reliable solution for specific hydraulic systems, ensuring stable autopilot compatibility and performance.

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ACU-300 Power Drive Unit

£1,716.89 GBP

£1,716.89 GBP ~~£1,896.14 GBP~~

Frequently Asked Questions

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What is the Raymarine ACU-300 power drive unit used for?

The Raymarine ACU-300 power drive unit (E70139) is an actuator control unit designed specifically for Evolution autopilot systems. It manages power supply and control for constant-flow hydraulic drive units. The ACU-300 ensures seamless integration with the SeaTalkng network and is part of a complete steering solution, complementing the EV-1 sensor and p70/p70s/p70R/p70Rs control heads.

Which types of drive units are compatible with the ACU-300?

The ACU-300 is specifically designed for hydraulic drives of type 1, type 2, and type 3. It is also compatible with constant-flow pumps. It is rated for higher power requirements than the ACU-100 and ACU-150 models.

How does the ACU-300 connect to other components in the Evolution system?

The ACU-300 connects to Raymarine's SeaTalkng network. This connectivity simplifies data and power integration with other Evolution system components, such as the EV-1 sensor and p70/p70s/p70R/p70Rs control displays, via a single network cable.

Can the rudder limit be adjusted when the ACU-300 is used with a constant-flow pump?

No, in systems using an ACU-300 with a constant-flow pump, the rudder limit is fixed at 30 degrees and cannot be modified. This configuration is optimized to ensure stable and secure autopilot performance.

What is the difference between the ACU-300 and the other ACU models (ACU-100/150, ACU-200/400)?

The ACU-300 is designed for hydraulic drives of types 1, 2 and 3, as well as constant-flow pumps, requiring higher power demands. In contrast:

The ACU-100 and ACU-150 are intended for systems with lower current or mechanical drives. The ACU-200 and ACU-400 are dedicated to very high-power electromechanical or hydraulic cylinders. Each model is optimized for specific drive types and power requirements within the Evolution range.

Is a rudder angle sensor required for installing the ACU-300?

A rudder angle sensor (rudder reference transducer) is highly recommended for optimal autopilot operation with the ACU-300. While the system can function without it, its presence allows for precise definition of port and starboard rudder limits, improves steering performance, and simplifies the calibration process—especially rudder alignment during initial setup.