Description
Product Model | DPU-MR
Manufacturer | Metso (now Valmet)
Product Category | Distributed Processing Unit (DCS Controller)
Processor | High-Performance Industrial CPU (Dual-Core)
System Memory (RAM) | Up to 1 GB DDR3
Program Storage | 512 MB Flash Memory
Communication Interfaces | Dual Gigabit Ethernet, RS-485 Port
Native Protocol | Metso DNA Network Protocol
Secondary Protocols | OPC UA, Modbus TCP/IP, IEC 60870-5-104
Redundancy Support | Hot Standby with Synchronization Cable
Operating Temperature | 0°C to 50°C (32°F to 122°F)
Humidity Tolerance | 5% to 95% RH, non-condensing
Installation Method | DIN-Rail or 19” Rack Mount in DNA Chassis
Product Overview
The DPU-MR is a high-performance distributed processing unit developed by Metso Automation (now part of Valmet following the 2020 merger) as a central control module within the Metso DNA™ distributed control system. Designed for demanding industrial environments, the DPU-MR serves as the computational backbone for real-time process control, data acquisition, and system coordination across large-scale automation infrastructures. As a key component in the Metso DNA architecture, the DPU-MR delivers deterministic execution of control logic, ensuring precise regulation of critical process variables in continuous and batch operations.
Engineered for mission-critical applications, the DPU-MR supports advanced control strategies including cascade loops, interlocks, and sequence-of-events (SOE) handling with millisecond-level accuracy. Its integration into the Metso DNA ecosystem enables seamless communication with I/O modules, operator stations, and engineering workstations through a secure, time-synchronized network. With support for IEC 61131-3 programming standards and robust diagnostics, the DPU-MR provides a scalable and future-ready platform for industries requiring high availability and long-term system stability. Whether deployed in pulp and paper mills, power plants, or mineral processing facilities, the DPU-MR ensures reliable, uninterrupted operation under the most challenging conditions.
DPU-MR METSO
Core Advantages and Technical Highlights
The DPU-MR stands out in industrial automation for its exceptional balance of processing power, redundancy capability, and seamless integration within the Metso DNA environment. One of its most significant strengths is native support for hot-standby redundancy, allowing two DPU-MR units to operate in parallel with continuous synchronization. In the event of a primary unit failure, the standby unit takes over within milliseconds—ensuring zero disruption to critical processes. This fault-tolerant design is essential for industries where unplanned downtime can result in significant financial or safety consequences.
High-speed processing and ample memory resources enable the DPU-MR to execute complex control algorithms across thousands of I/O points with minimal scan time. The dual Gigabit Ethernet ports provide high-bandwidth connectivity, supporting both control network traffic and enterprise-level data exchange via OPC UA. This dual-role capability allows the DPU-MR to act not only as a real-time controller but also as a data gateway for higher-level systems such as MES and ERP platforms. Its support for multiple communication protocols—including Modbus TCP and IEC 60870-5-104—ensures smooth interoperability with third-party devices and legacy systems.
Robust security and long-term maintainability further enhance the value of the DPU-MR. Firmware updates can be performed online without process interruption, and comprehensive diagnostic tools offer deep visibility into CPU load, memory usage, and network health. The DPU-MR is also designed for easy scalability, allowing engineers to expand control capacity by adding additional units or I/O racks within the same chassis. With its industrial-grade construction and compliance with electromagnetic compatibility standards, the DPU-MR delivers consistent performance even in electrically noisy environments. This combination of performance, resilience, and adaptability makes the DPU-MR a trusted choice for modernizing and future-proofing industrial control systems.
Application Field
The DPU-MR is extensively deployed in heavy process industries where operational continuity, precision control, and system integration are paramount. In pulp and paper manufacturing, the DPU-MR plays a central role in managing paper machine drives, steam and stock preparation systems, and chemical recovery processes. Its ability to synchronize high-speed actuators and regulate temperature and pressure with minimal latency ensures consistent product quality and maximizes production efficiency.
In power generation—particularly in biomass-fired and recovery boilers within integrated pulp mills—the DPU-MR controls combustion dynamics, steam drum levels, and emissions monitoring systems. Its integration of safety logic within the standard control framework reduces system complexity while enhancing response reliability. Similarly, in mining and mineral processing, the DPU-MR oversees slurry pumping, grinding circuits, and flotation cell operations, where robust control under variable feed conditions is essential for throughput optimization.
The DPU-MR is also well-suited for chemical and water treatment plants requiring batch processing and recipe-based control. Its support for IEC 61131-3 programming enables flexible implementation of complex sequences, while time-stamped event logging aids in compliance reporting and incident analysis. By serving as a central node in redundant DCS architectures, the DPU-MR ensures data integrity and high availability across enterprise-wide automation networks. Its proven reliability in harsh industrial environments makes the DPU-MR a preferred solution for operators who demand uninterrupted performance and long-term system sustainability.
Related Products
DPU-MH: A higher-capacity variant of the DPU series, ideal for central plant-wide controllers requiring maximum I/O density and processing throughput.
DPU-LR: A compact, cost-effective processing unit designed for localized control tasks with moderate I/O requirements.
DPU-SR: A standard-performance DPU model suitable for non-redundant or smaller-scale Metso DNA installations.
DNA-CP: Legacy central processor used in earlier Metso DNA systems, often upgraded to DPU-MR for improved performance and redundancy.
AI810 / DI810: Analog and digital input modules that seamlessly interface with the DPU-MR for field signal acquisition.
DNA-OP5000: High-performance operator station used alongside the DPU-MR for HMI, process visualization, and alarm management.
DNA-FW: Network firewall module that enhances cybersecurity in Metso DNA systems, commonly deployed in configurations with DPU-MR.
Redundancy Sync Cable Kit: Essential hardware for establishing high-speed synchronization between redundant DPU-MR units.
DPU-MR METSO
Installation and Maintenance Instructions
Installation preparation: Before installing the DPU-MR, ensure the control cabinet meets environmental specifications, including adequate ventilation, EMI shielding, and protection from moisture and dust. Verify that the 24 VDC power supply is stable, properly grounded, and supports redundant input. Confirm compatibility with the Metso DNA chassis and ensure all firmware versions across the network are synchronized. Use only certified Ethernet and fiber optic cables, and follow Metso’s recommended network topology to avoid communication delays. Clearly label all network and synchronization cables to simplify commissioning and troubleshooting.
Maintenance suggestions: Regularly monitor the status LEDs on the DPU-MR to verify normal operation, redundancy status, and network connectivity. Perform firmware updates through Metso DNA Studio only after creating full system backups. Conduct quarterly inspections of power supplies and cooling systems to prevent overheating. Utilize built-in diagnostic tools to review CPU utilization, memory allocation, and communication errors. For redundant setups, schedule annual failover tests to validate seamless switchover. Keep spare DPU-MR units on-site, pre-configured and calibrated, to minimize downtime during unexpected failures.
