Sleipner SMAMS-2 Auto Main switch for S-Link 12v, 24v, and 48v Thrusters

Sleipner SMAMS-2 Auto Main Switch for S-Link Thrusters (Replaces SM897712 & SM897724)

The Sleipner SMAMS-2 (also listed as AMS-2) is the latest automatic main switch for Sleipner S-Link thruster systems. It replaces the older SM897712, SM897724, and the earlier AMS-1 while keeping the same mounting footprint and overall dimensions.

The SMAMS-2 AutoMainswitch lets you control the thruster main power directly from any Sleipner S-Link control panel, so there is no separate battery switch to remember. It supports 12 V, 24 V, and 48 V thrusters for simple, safe, and user friendly installations. Fuse and fuse holder are not included and must be sized and installed according to the thruster manual.

Overview

• Automatic main switch for Sleipner S-Link bow and stern thrusters.
• New upgraded AMS-2 version that replaces AMS-1, SM897712, and SM897724.
• Works with 12 V, 24 V, and 48 V DC thruster systems.
• Main power is controlled from the Sleipner thruster control panel for seamless operation.
• Same mounting dimensions as earlier AutoMainswitch models for straightforward replacement.
• Fuse and holder sold separately so you can match the exact thruster and installation requirements.

Key Features

• Enhanced electronics: Updated design with modern components and control logic for reliable switching.
• Thermal monitoring: Internal monitoring improves safety and can help protect wiring and components during heavy use.
• Multi voltage support: Designed for 12 V, 24 V, and 48 V Sleipner S-Link thruster systems.
• Seamless integration: Same footprint and mounting hole pattern as previous AutoMainswitch units.
• User friendly control: Main power is switched on and off automatically from the Sleipner S-Link control panel.
• Clean wiring layout: Keeps high current switching close to the batteries while the helm panel carries only control signals.
• Designed for marine use: Built for installation in busy machinery spaces and lockers on cruising and working vessels.

Specifications

Compatibility and Applications

Always confirm compatibility with your specific thruster model and S-Link layout using the current Sleipner documentation or by contacting our tech support team.

Installation Tips

• Verify thruster model, system voltage, and that your system uses the Sleipner S-Link control network before ordering.
• Mount the SMAMS-2 close to the thruster batteries and bus bars to keep high current cable runs as short as practical.
• Use correctly sized tinned marine grade cable and lugs for the thruster current and run length recommended by Sleipner.
• Select and install the correct fuse and fuse holder based on the thruster manual and ABYC guidelines.
• Follow Sleipner wiring diagrams carefully for S-Link, main power, and control connections.
• Label all cables and S-Link harnesses to simplify future troubleshooting or upgrades.

Maintenance Guidelines

• Inspect cable lugs and mounting hardware regularly for corrosion or looseness, especially in saltwater environments.
• Check that cable runs are supported and not rubbing on sharp edges, moving parts, or hot components.
• Periodically verify that the AutoMainswitch engages and disengages correctly from each thruster control panel.
• If you notice unusual heat, noise, or intermittent operation, have the system inspected before further use.
• Keep a copy of the thruster and AutoMainswitch wiring diagrams on board for reference.

Frequently Asked Questions

Does the SMAMS-2 include a fuse?
No. The AutoMainswitch does not include the main fuse or fuse holder. You will need to select the correct fuse type and rating based on your specific Sleipner thruster model and installation instructions.

Is the SMAMS-2 a direct replacement for SM897712 and SM897724?
Yes, the SMAMS-2 is designed as the updated replacement for SM897712 and SM897724 AutoMainswitch units, as well as the earlier AMS-1. It keeps similar dimensions and mounting to simplify replacement.

Can I use SMAMS-2 on both 12 V and 24 V thrusters?
Yes. The AMS-2 supports 12 V, 24 V, and 48 V DC systems when wired correctly and fused according to the thruster manual.

Do I still need a separate battery switch?
The AutoMainswitch is designed to handle the thruster main power switching, controlled by the Sleipner S-Link control panel. Many installations rely on the AutoMainswitch instead of a separate dedicated thruster battery switch, but local regulations and best practices should always be considered.

Questions?

• Tech Support: Tech Support Page
• Check Stock: Stock Inquiry Page
• Request a Shipping Quote: Request Quote Page
• Learn More About Seatech: About Us Page

• No Sales Tax on purchases outside California
• Buy Now Pay Later with Affirm or PayPal
• FREE Ground Shipping to the Lower 48 States
• Sidepower is now Sleipner
• Distributed by Imtra in the USA
• Seatech Marine Products, Inc. is an authorized dealer and service center for Sleipner Side-Power bow and stern thrusters

International, USVI, Puerto Rican, Hawaiian & Alaskan Customers: We ship worldwide and via USPS. If shipping looks high, contact us for a quote.