The AUTO-MASKIN DCU 305 A R2 is a legendary, high-reliability engine control unit designed specifically for the rigorous demands of marine and industrial diesel engine applications. Since its introduction, it has served as a core component for monitoring and managing propulsion engines and generator sets (gensets). It comes as a complete system paired with the RK-66 R2 wire terminal module, providing comprehensive I/O capabilities for safety, control, and alarm management.
Product Parameters
Product Model: AUTO-MASKIN DCU 305 A R2
Compatible Hardware: RK-66 R2 Terminal Module, AK-6 (Analog Expansion), MK-14 (Relay Expansion)
Dimensions (H x W x D): 160mm x 250mm x 35mm
Total Depth (including cables): 105mm
Weight: 1.25 kg (Control Unit)
Supply Voltage: 18–32V DC (24V nominal)
Protection Level: IP54 (Front Panel), IP30 (Back Panel)
Operating Temperature: 0°C to +70°C
Origin: Designed/Engineered by Auto-Maskin (Norway)
Technical Datasheet Overview
The system is highly modular and flexible. The core controller handles input signals from engine sensors and switches, while the RK-66 R2 provides the physical connection points.
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Performance: Features built-in backup for critical shutdown channels to ensure engine safety.
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Communication: Prepared for Modbus RTU communication, allowing seamless integration with ship alarm systems or the RSP 305 Remote Panel.
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Configuration: Uses the dedicated “Rudolf R2” Windows-based software to customize parameters for unique project requirements.
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Expandability: Supports the AK-6 unit (six 4-20 mA channels) and the MK-14 unit (14 relay channels) for advanced site-specific needs.
For more technical information, please visit the AUTO-MASKIN DCU 305 product page.
Application Fields
The DCU 305 A R2 is specifically built for harsh operating environments:
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Marine Propulsion: Controls main engines on various commercial and private vessels.
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Generator Sets (Gensets): Used for power generation monitoring in auxiliary and emergency power systems.
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Industrial Engines: Deployed in stationary power plants where ruggedness and reliability are paramount.
Product Operating Instructions
This unit is designed to be configured via the “Rudolf R2” software on a laptop. Operators should ensure all sensor wiring is connected securely to the RK-66 R2 terminal module. The controller monitors supply voltage; the LCD backlight will automatically turn off if the primary supply drops below 18V and resumes once it stabilizes above 20V. For maintenance, ensure the unit is kept in a dry environment (<90% humidity) and regularly inspect the cable connections to prevent noise interference. Grounding must be handled carefully, as the unit features specific filter components to isolate the system from electrical noise.
Frequently Asked Questions (Q&A)
What is the difference between the DCU 305 A R2 and the P R2? The “A” variant is designed for auxiliary and emergency power projects, while the “P” variant is configured specifically for propulsion engine applications. Can I still get this part? Yes, the DCU 305 A R2 remains available as a spare part for existing systems. How do I handle alarms? The unit allows for fully customizable warning, alarm, or shutdown setpoints for all 12 switch inputs via the software. Can I expand the I/O? Yes, you can add the MK-14 card for more relay channels or the AK-6 card for additional analog inputs. What if the CAN bus version is obsolete? The original CAN variants are no longer produced, but they can generally be replaced by the newer DCU 305 R3 series.
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