Raymarine ACU-400 Actuator Control Unit
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Raymarine · Code E70100
Autopilots & Control · Heading control
Autopilots
ACU-300 / ACU-400 — shared exterior appearance of the enclosure
Image: Raymarine
Discover the product
The ACU-400 is an Evolution power unit for demanding autopilot systems, with a drive output of up to 30 A continuously. It supports a 12 or 24 V supply and a clutch output of up to 4 A. The drive, supply and wiring must be sized for the specific installation, rather than vessel length alone.
Compatible equipment
Documented connections for specific catalogue codes, including parts, requirements and manufacturer sources. Selected equipment ranges are covered; an unlisted combination does not imply incompatibility. Each connection path is assessed separately and is not a complete installation design.
14 documented connections · Sources checked: 2026-10-10
Explore connections, components & diagrams ↗
Equipment connection guide ↗
Type 2/12v Hydraulic Linear Drive · E12207
ACU-400 · Direct
DRIVE · power / clutch
No additional adapter is required for this connection.
Functions: Steering system drive
12 V · up to 22,000 kg · Type 2 hydraulic linear
An ACU–drive match is not a complete autopilot. EV-1, a suitable controller, a network and a technical steering-system design are required.
Check motor voltage, clutch, mechanical travel / hydraulic displacement and wiring before installation.
For older ACU-150/400 units, check the serial number against the official recall. The notice applies to specific units, not the entire range.
Type 2 Hydraulic Linear Drives — codes and ACU · Official manufacturer page · checked 2026-10-10
ACU-150 / ACU-400 — affected serial number check · Official manufacturer page · checked 2026-10-10
Type 2/24v Hydraulic Linear Drive · E12208
ACU-400 · Direct
DRIVE · power / clutch
No additional adapter is required for this connection.
Functions: Steering system drive
24 V · up to 22,000 kg · Type 2 hydraulic linear
An ACU–drive match is not a complete autopilot. EV-1, a suitable controller, a network and a technical steering-system design are required.
Check motor voltage, clutch, mechanical travel / hydraulic displacement and wiring before installation.
For older ACU-150/400 units, check the serial number against the official recall. The notice applies to specific units, not the entire range.
Type 2 Hydraulic Linear Drives — codes and ACU · Official manufacturer page · checked 2026-10-10
ACU-150 / ACU-400 — affected serial number check · Official manufacturer page · checked 2026-10-10
Type 2 /12v Hydraulic Pump · M81121
ACU-400 · Direct
DRIVE · power / clutch
No additional adapter is required for this connection.
Functions: Steering system drive
12 V · 230–350 cc cylinder
An ACU–drive match is not a complete autopilot. EV-1, a suitable controller, a network and a technical steering-system design are required.
Check motor voltage, clutch, mechanical travel / hydraulic displacement and wiring before installation.
For older ACU-150/400 units, check the serial number against the official recall. The notice applies to specific units, not the entire range.
Type 2 Hydraulic Pumps — codes and ACU · Official manufacturer page · checked 2026-10-10
ACU-150 / ACU-400 — affected serial number check · Official manufacturer page · checked 2026-10-10
Type 2/24v Hydraulic Pump · M81123
ACU-400 · Direct
DRIVE · power / clutch
No additional adapter is required for this connection.
Functions: Steering system drive
24 V · 230–350 cc cylinder
An ACU–drive match is not a complete autopilot. EV-1, a suitable controller, a network and a technical steering-system design are required.
Check motor voltage, clutch, mechanical travel / hydraulic displacement and wiring before installation.
For older ACU-150/400 units, check the serial number against the official recall. The notice applies to specific units, not the entire range.
Type 2 Hydraulic Pumps — codes and ACU · Official manufacturer page · checked 2026-10-10
ACU-150 / ACU-400 — affected serial number check · Official manufacturer page · checked 2026-10-10
Type 2/12v Short Shaft Linear Drive · M81131
ACU-400 · Direct
DRIVE · power / clutch
No additional adapter is required for this connection.
Functions: Steering system drive
12 V · up to 15,000 kg · Type 2 short linear
An ACU–drive match is not a complete autopilot. EV-1, a suitable controller, a network and a technical steering-system design are required.
Check motor voltage, clutch, mechanical travel / hydraulic displacement and wiring before installation.
For older ACU-150/400 units, check the serial number against the official recall. The notice applies to specific units, not the entire range.
Type 2 Linear Drive Units — codes and ACU · Official manufacturer page · checked 2026-10-10
ACU-150 / ACU-400 — affected serial number check · Official manufacturer page · checked 2026-10-10
Type 2/24v Short Shaft Linear Drive · M81133
ACU-400 · Direct
DRIVE · power / clutch
No additional adapter is required for this connection.
Functions: Steering system drive
24 V · up to 15,000 kg · Type 2 short linear
An ACU–drive match is not a complete autopilot. EV-1, a suitable controller, a network and a technical steering-system design are required.
Check motor voltage, clutch, mechanical travel / hydraulic displacement and wiring before installation.
For older ACU-150/400 units, check the serial number against the official recall. The notice applies to specific units, not the entire range.
Type 2 Linear Drive Units — codes and ACU · Official manufacturer page · checked 2026-10-10
ACU-150 / ACU-400 — affected serial number check · Official manufacturer page · checked 2026-10-10
View all 14 connections in the guide ↗
Functions & interfaces
Heading control
Technical specifications
Equipment type
Autopilots & Control
Clutch output
Up to 4 A continuous at 12 V on 12 V systems Up to 4 A continuous at 24 V on 24 V systems Up to 4 A continuous at 12 V on 24 V systems
Continuous current drive
Maximum continuous 30 A in the voltage power supply
Dimensions
Width: 285 mm, Height: 211.5 mm, Depth: 64.5 mm
Weight
2.2 kg
Protection against water
Drip resistance
Operating temperature
-20 °C to +55 °C
Main supply standby consumption
300 mA (12 / 24 V)
Bus power SeaTalkng
3 A @ 12 V (fuse 3 A)
Nominal power supply
12 / 24 V dc
Operating voltage range
10.8 V dc to 31.2 V dc
Load NMEA 2000 (LEN)
1
Selection & compatibility
This model is included in our catalogue. The exact configuration, compatibility and supply availability are confirmed when you contact us.
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Kit contents, interfaces and required accessories are checked for the exact part number. Connection to another system does not mean all functions are built in.
Is it right for your vessel?
Tell us about your vessel, existing equipment and requirements. Elmare will help you choose the right configuration.
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+30 210 400 2538
Elmare · 1 Proussis Street, Keratsini