KONGSBERG RCU 502i Remote Controller Unit is a high-performance, highly reliable general-purpose real-time process control device. As an upgraded and optimized model of the RCU 502 series, it is suitable for harsh onshore and offshore applications, and is primarily positioned as a core hub for remote control of critical equipment and system monitoring.
Featuring an embedded high-performance processor architecture, abundant interface configurations, multiple redundancy designs and strict environmental adaptability, this product is widely integrated in marine automation, ocean engineering, industrial automation and other fields. It enables precise control and status monitoring of thrusters, steering gears, navigation sensors, process equipment and more. Having obtained multiple international certifications, it is perfectly adapted to stable operation under extreme working conditions, providing a safe, efficient and scalable remote control solution for various complex control systems.
Hardware Specifications & Structural Features
1. Core Processor & Memory Configuration
The RCU 502i is equipped with a high-performance embedded processor, supporting both PowerPC™ architecture and ARM Cortex-A9 dual-core processor (configurable as an option).The ARM Cortex-A9 processor operates in lockstep mode to ensure instruction synchronization and fault tolerance, with a cycle time of ≤10ms, meeting stringent real-time control requirements.The PowerPC™ architecture processor features a clock speed of up to 400MHz, delivering powerful arithmetic and logic computing capabilities for efficient multi-channel data processing and complex control logic execution.
For memory, the unit is fitted with 32MB SDRAM and 16MB flash memory, supporting program storage, data buffering, and fault log recording.It also supports booting from a file server or local flash memory, ensuring stable and flexible system startup.
2. Interface Configuration & Communication Capabilities
The RCU 502i features rich interface resources for high compatibility and scalability, enabling seamless integration with third-party devices and various control systems, including:
- Dual RJ45 Ethernet ports (IEEE 802.3, 10BASE‑T/100BASE‑TX) with Ethernet ring redundancy for uninterrupted data transmission;
- Dual RedundancyNet ports supporting redundant RCU configuration to enhance system reliability;
- Dual remote I/O process bus (RBUS) ports using RS485 multi-drop connection, with a transmission rate of 2Mb/s and Manchester encoding;
- 4-channel general-purpose digital inputs and 4-channel general-purpose digital outputs for basic discrete control;
- Up to 32 serial communication ports, including 12 general RS‑232/RS‑422/RS‑485 ports and 4 isolated serial ports, supporting parallel multi-device communication;
- 2 PROFIBUS channels (transmission rate up to 12Mbps) and 2 CANBUS channels (selectable baud rates: 250kbps / 1Mbps), further improving compatibility with external devices.
3. Environmental Adaptability & Protection Design
Designed for harsh environments, the product provides exceptional environmental resilience and protection:
- Operating temperature range: ‑25°C to +70°C, suitable for temperature variations from polar to tropical marine and industrial environments;
- Relative humidity tolerance: 5%–95% (non‑condensing), adaptable to high‑humidity conditions;
- Passed IEC 60945 vibration test (5–100Hz / 2g) and ISO 9227 salt spray test (1000 hours), delivering excellent anti‑vibration and anti‑corrosion performance for stable operation in rough seas or industrial dust environments;
- Meets industrial and marine standards for ingress protection, and holds Ex Zone 2 certification for safe use in potentially explosive atmospheres.
4. Power Supply & Redundancy Design
The RCU 502i adopts a redundant power input design, supporting a wide voltage range of 24VDC ±30% (18–32VDC for certain configurations), with inrush current and overvoltage protection.Dual power supplies automatically switch over to prevent system shutdown due to single‑point failures.
It features low power consumption: typical power dissipation is approximately 6W (excluding solenoid power), and around 20W for selected configurations, aligning with energy‑saving requirements.Additionally, the unit supports hot‑swap functionality, allowing hot replacement of RCU 500 series modules in redundant systems to minimize downtime and maximize system availability.
Functions and Control Features
(I) Real-Time Control and Regulation Functions
The RCU 502i features powerful real-time control capabilities and supports multiple control modes with algorithm optimization. It incorporates built-in PID regulation, which optimizes heading and speed control via algorithms to reduce manual intervention. For instance, on research vessels navigating polar ice-covered waters, this function can reduce vessel track deviation by 40%. It supports joystick control mode, automatic heading mode, position hold mode (optional), and autopilot mode (optional). The joystick mode enables manual control of vessel position and heading via a 3-axis joystick; the automatic heading mode maintains a preset heading automatically; the position hold mode, when used with a GNSS interface, achieves precise positioning of vessels or offshore platforms; and the autopilot mode allows automatic vessel navigation along predefined headings. Additionally, it supports three-level controller gain settings (low, medium, high), enabling flexible adjustment of control precision according to actual operating conditions.
(II) Fault Diagnosis and Self-Healing Capabilities
The product is equipped with a comprehensive fault diagnosis and self-healing mechanism to ensure stable system operation. It features a built-in self-test (BIST) system that performs real-time computer diagnostics and fault identification during startup and operation, promptly detecting issues such as sensor anomalies, communication interruptions, and module failures, and feeding back fault information to the operator station via an error reporting system. With an enhanced watchdog timer and hardware monitoring module, it provides fail-safe functionality and system status output, monitoring module temperature, power supply status, and other parameters in real time. When abnormalities occur, it triggers a preset recovery process to minimize downtime. It also supports online remote diagnosis and firmware upgrades, facilitating remote troubleshooting and system updates for users while reducing maintenance costs.
(III) Protocol Compatibility and Data Interaction Functions
The RCU 502i is compatible with a variety of mainstream communication protocols, enabling seamless connection with diverse systems, including Modbus (serial and TCP), NMEA 0183, PROFIBUS/PROFIsafe, CAN/DeviceNet, among others. Customized protocols for third-party manufacturers can also be developed to meet user requirements. Leveraging its extensive protocol support, the product acts as a navigation sensor integrator for data acquisition and integration of various navigation equipment. It can also be integrated into process control systems and safety systems to realize real-time data interaction and sharing, providing flexible adaptability for system integration.
(IV) Human-Machine Interaction and Configuration Functions
The product is fitted with a user-friendly human-machine interface, featuring a 5.7-inch color LCD display (800×480 pixel resolution) that supports multilingual display (over 15 languages) and 20 graphic symbols. It presents system status, fault information, control parameters, and other key data, allowing crew or operators to quickly access critical information. Equipped with 8 programmable function keys and a heading selector wheel, it supports customized operational functions to streamline workflows, reducing emergency shutdown response time to 3 seconds. It accommodates up to 60 user-designed screens, enabling users to customize display content and operation interfaces based on actual needs. It also supports plug-in connections and a 3-bit address switch for convenient installation and configuration, allowing new users to master operations rapidly and cutting crew training time by 50%.
Application Scenarios
- Shipbuilding and Marine EngineeringAs a core component of ship automation systems, it is widely used in container ships, oil tankers, LNG carriers, research vessels, naval vessels and other types of ships, realizing centralized monitoring and remote control of main engines, auxiliary engines, steering gears and thrusters. It can be integrated into Dynamic Positioning Systems (DPS) to control the position and movement of offshore platforms, ships, submersibles and other equipment, ensuring they maintain a fixed position. It can also be used to control marine detection equipment such as sonar, underwater robots and side-scan sonar, enabling precise control of underwater operations. It plays an important role in Antarctic scientific research, offshore oil and gas development and other scenarios.
- Industrial AutomationSuitable for petroleum and natural gas, chemical, energy, manufacturing and other industries, it can be integrated with process control systems and safety systems to achieve comprehensive monitoring and automated management of production processes. It can be used to monitor and control various digital equipment, traffic signals, navigation beacons and so on, ensuring safe equipment operation and reliable traffic flow. It can also be applied in water treatment, environmental protection, building automation, pharmaceuticals and other fields to meet diverse remote control requirements.
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