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300 Series

The Proven Choice

The Marine Plus 300 Series of diesel engine control units (DCU’s) has continued the long tradition of Auto-Maskin in providing cost effective, simple, easy to install and Classification certified equipment to the marine engine market globally.

The series include engine panels, expansion modules and remote panels.

Marine Plus system example

With key features and attributes to compliment high quality construction at ISO approved facilities, and a team of engineers dedicated to improved products, installation and operational trouble shooting, and after sales support, customers of the Marine plus system have continually specified and re specified orders for these simple, robust and effective panel systems.

Selected by several engine builders as their preferred monitoring system, the 300 Series of units has fully protected owners investments since 1999.


Rudolf Cable P/N: 1075225 This cable is used between a PC with an RS-232 port and the DCU 305 to configure the DCU 305. The PC must have the Rudolf configuration software installed. If there is no RS-232 port on the PC, then this cable shall be used together with the USB to RS-232 converter cable (p/n 1020080).


DCU 305 R3 Engine Controller P/N: 1006602 The DCU 305 R3 is the top of the line in the Plus 300 product range. It is easily configured with the Rudolf R3 PC configuration software. As standard, it includes an interface to the engine J1939 CANbus data link. It has Modbus RTU for communication to ships alarm system. Read more...


USB to RS-232 Converter Cable P/N: 1020080 The USB to RS-232 converter cable makes it possible to use a PC without an RS-232 port and still successfully configure the DCU 305. It shall be connected in series with the Rudolf cable.


DCU 305 R2 Engine Controller P/N: 1006400 The DCU 305 R2 is a basic yet capable engine controller that is suitable for fixed speed generator engines not requiring a J1939 data link. It is easily configured with the Rudolf R2 PC configuration software. Read more...


RSP 305 Remote Panel P/N: 1006500 The RSP 305 remote panel is designed for intuitive remote monitoring and control of one to four engines. Upon connection, it will automatically read the configuration from the connected DCU 305 engine panels. Within seconds, the RSP 305 remote panel is ready configured. It really is that easy. No need for any manual configuration or special tools. Read more...


RK-66 Interface Module P/N: 1075410 This interface module is a mandatory requirement for each DCU 305 controller. The same module is used for the DCU 305 R2 and the DCU 305 R3. Read more...


AK-6 Analog Expansion P/N: 1075264 The AK-6 easily adds six more 4-20mA channels to the DCU 305 panels of type R2 and R3. Only one unit can be used per DCU 305 panel. The channels are configured in the standard Rudolf conffiguration software, and new channels will be visible on page 2 of the DCU panel. The unit also sports an expansion port for an optional relay expansion unit.


MK-14 Relay Expansion P/N: 1121341 The MK-14 is a compact relay expansion unit, with 14 relays onboard. Each relay has a potential-free changeover contact. Use the configuration tool to configure the desired function to each relay. It can be any function available in the panel it is connected to. The MK-14 is designed for the 300 and 400 Series panels. Read more...


Configuration Software for DCU 305 The DCU 305 is customised using a configuration tool for Windows®, the Rudolf software. There are two different types. The Rudolf R2 is for the DCU 305 R2 series, whereas the Rudolf R3 is for the DCU 305 R3 series. Downloads...


DCU 110 Engine Controller P/N: 1006700 The DCU 110 is an electronic control unit for control and monitoring of diesel engines used as propulsion engines or generator sets. It is a standalone unit without interface to other Marine Plus expansion units. Read more...