Rolls-Royce Marine Brattvaag WRC1021B Controller Board
Rolls-Royce Marine Brattvaag WRC1021B Controller Board
The Rolls-Royce Marine AS WRC1021B is an industrial-grade controller board specifically engineered for harsh maritime and heavy-industry applications.
Originally developed under the specialized Ulstein / Marine Brattvaag automation and hydraulic system divisions, the WRC1021B acts as a core processing and driver unit for valve control, winches, and marine speed governing systems.
It bridges the gap between supervisory bridge control commands and the precision actuation of physical shipboard machinery.
Technical Parameter Table
| Parameter / Feature | Technical Specification Details |
| Manufacturer | Rolls-Royce Marine AS (Ulstein / Brattvaag Automation) |
| Model / Part Number | WRC1021B (Alternate P/N: 63335, PCB Mark: KCL-3-94V-0) |
| Sub-Model Configurations | 215-459A / 222-650 (Application-specific firmware/build variants) |
| Power Capacity | 10VA (Primary: 2x115V, 50/60Hz |
| Thermal Limit | Ambient Operating Temp $T_a \le 70^\circ\text{C}$ / Class B Insulation |
| I/O Capacity | High-density configuration supporting up to 256 digital/analog channels |
| External Sensor Support | Integrated dual-channel PTC thermistor interface (Extern: 2xPTC sek B59910-C120-A70) |
| Enclosure Protection | IP65 rated when mounted inside designated control housing |
| Physical Weight | Approximately 470g to 480g (Board level) |
Product Advantages and Features
Integrated Thermal Sensing: Features dedicated connections for dual external PTC thermistors ($B59910-C120-A70$), allowing real-time thermal monitoring of attached hydraulic pumps or valve solenoids directly from the board.
High Environmental Resilience: Built with heavy-duty electromagnetic compatibility (EMC) shielding and moisture-resistant coatings to survive high-vibration engine rooms and marine environments.
Precision Latency Management: Optimized for low-latency signal conversion, translating complex analog loop signals into exact mechanical positioning outputs.
Dual-Voltage Flexibility: Dual-primary transformer design ($2\text{x}115\text{V}$) ensures seamless integration with standard international vessel grids.
Application Cases
The WRC1021B controller board is deployed across critical control loops where rapid, fail-safe adjustments are mandatory:
Marine Winch & Crane Systems: Specifically engineered for Marine Brattvaag hydraulic winches, regulating proportional valves to govern speed and tension control.
Marine Speed Control Systems: Direct oversight of engine/thruster RPM adjustments through electronic actuator governors.
Proportional Valve Management: Directly manages fluid distribution across complex hydraulic networks for steering gear and bow thrusters.
Industrial Process Automation: Employed in demanding land-based settings, including petrochemical processing plants and power generation plants for turbine control workflows.
Unique Product Description
What makes the Rolls-Royce WRC1021B uniquely vital is its specialized valve controller topology inherited from the Marine Brattvaag legacy.
While generic microcontrollers struggle with the high inductive kickbacks and extreme electrical noise of large marine hydraulic solenoids, the WRC1021B features built-in isolated transformer loops ($2\text{x}6\text{V}$ secondary output) and rigorous onboard circuit protection.
This makes it an indispensable component for retaining the safety certifications and high-torque accuracy of classic Ulstein marine propulsion setups.
Related Models & Same-Series Hardware
Rolls-Royce WRC1021A: The direct legacy predecessor; features lower processing throughput and less localized I/O density compared to the enhanced “B” revision.
Rolls-Royce / Ulstein PCC1030C: A sibling panel controller module focused on broader propulsion and rudder command management.
Rolls-Royce UN925: A specialized complementary power distribution unit often paired alongside the WRC series in marine control cabinets.
Rolls-Royce 5880-PC1020 (Rev D): Ruggedized user-interface control panel variant utilized in matching engine room automation frameworks.
Installation and Maintenance
Termination: Employs reliable screw-down electrical termination blocks designed to prevent loose connections caused by low-frequency vessel vibrations.
Thermal Protection: Ensure the external PTC thermistors are securely fastened to the monitored winding or valve housing to guarantee proper execution of the board’s auto-shutdown safety loops.
Lifecycle Status: This module has been officially discontinued by the original manufacturer. Maintenance operations depend on certified refurbished stock or legacy repair programs featuring matching 94V-0 ratings. Ensure that power supplies are fully isolated before extracting the PCB to protect onboard diagnostic circuitry.