Description
The AUTO-MASKIN DCU 305 A R2 Engine Control System Controller is a marine diesel engine monitoring and control unit designed for auxiliary engines, emergency generator sets, and marine propulsion applications. It is part of the Auto-Maskin 300 Series engine control platform and provides engine protection, monitoring, alarm handling, and control functions.
The DCU 305 A R2 works together with the RK-66 interface module to handle engine signals including switch inputs, analog inputs, relay outputs, and speed sensing. The controller can be configured through Auto-Maskin Rudolf configuration software and supports integration with vessel alarm systems through communication interfaces such as Modbus RTU.
This controller has been widely applied in marine vessels and generator systems since the 300 Series introduction, serving as a reliable spare replacement component for existing installations. The DCU 305 A R2 is a legacy controller model, while newer DCU 305 R3 units are available as replacement solutions for some variants.

DCU 305 A R2
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | AUTO-MASKIN |
| Model | DCU 305 A R2 |
| Series | Marine Pro 300 Series |
| Product Name | Engine Control System Controller |
| Product Type | Diesel Engine Control Unit |
| Application | Marine Engine Control, Generator Set Monitoring, Propulsion Systems |
| Product Status | Used / Surplus Stock |
| Dimensions | Approx. 250 × 230 × 60 mm (Main Unit) |
| Weight | Approx. 1.5 kg |
| Origin / Place of Origin | Norway |
| Power Supply | 18–32 VDC |
| Typical Power Consumption | Approx. 0.5 A at 24 VDC |
| Input Channels | Switch Inputs, Analog Inputs, Magnetic Pickup Inputs |
| Output Channels | Relay Outputs |
| Communication Interface | Modbus RTU / Serial Communication |
| Expansion Modules | RK-66 Interface Module, AK-6 Analog Expansion, MK-14 Relay Expansion |
| Configuration Software | Rudolf Configuration Software |
| Discontinued Status | Legacy Product / Spare Parts Available |
❓ Common Questions & Answers
Q: What is the main function of AUTO-MASKIN DCU 305 A R2?
A: The DCU 305 A R2 controls and monitors diesel engines by processing sensor signals, managing alarms, controlling outputs, and communicating with vessel automation systems.
Q: Where is the DCU 305 A R2 commonly used?
A: It is mainly used in marine vessels, auxiliary engines, emergency generator sets, and propulsion engine control applications.
Q: What modules are compatible with the DCU 305 A R2?
A: The controller can be expanded with modules such as RK-66 interface module, AK-6 analog expansion unit, MK-14 relay expansion unit, and RSP 305 remote panel.
Q: Can DCU 305 A R2 replace DCU 305 R1?
A: The DCU 305 A R2 is designed as a replacement for certain earlier DCU 305 variants, but configuration, wiring, and application requirements should be checked before installation.
Q: What should be checked before commissioning?
A: Verify supply voltage, RK-66 wiring, sensor connections, relay configuration, communication settings, and Rudolf software parameters before operation.
Q: Is the DCU 305 A R2 discontinued?
A: The DCU 305 A R2 is considered a legacy controller. Some variants remain available as spare parts, while CAN versions have replacement paths through newer DCU 305 R3 controllers.
⭐ Recommended AUTO-MASKIN Models
- AUTO-MASKIN DCU 305 R3 – Next Generation Engine Controller
- AUTO-MASKIN DCU 305 P R2 – Propulsion Engine Controller
- AUTO-MASKIN DCU 305 A R2 CAN – CAN Bus Engine Controller Variant
- AUTO-MASKIN DCU 305 P R2 CAN – CAN Propulsion Controller Variant
- AUTO-MASKIN DCU 410E – Advanced Engine Controller
- AUTO-MASKIN DCU 210E – Compact Engine Controller
- AUTO-MASKIN DCU 2700 – Modern Engine Monitoring Controller
- AUTO-MASKIN RSP 305 – Remote Display Panel
- AUTO-MASKIN RK-66 – Engine Controller Interface Module
- AUTO-MASKIN AK-6 – 6-Channel Analog Expansion Module
- AUTO-MASKIN MK-14 – 14-Channel Relay Expansion Module
- AUTO-MASKIN Rudolf Configuration Software – Controller Configuration Platform
- AUTO-MASKIN Marine Pro 300 Series Controller – Marine Automation Platform
- AUTO-MASKIN Generator Control System Module – Generator Monitoring Solution
- AUTO-MASKIN Diesel Engine Monitoring Unit – Marine Engine Automation Module
