Metso D201505R (ACN C20 Series)
The Metso D201505R (often associated with the ACN C20 series) is a high-performance Network Controller / Processor Module within the Metso DNA (now Valmet DNA) Distributed Control System.
It is an industrial-grade “Automation Cloud Node” designed to serve as a central communication and control hub.
1. Introduction
The D201505R is a robust Network Controller that bridges the gap between field-level I/O and the supervisory DNA network.
The “R” in the model name typically indicates Redundancy support, meaning this module is specifically engineered to work in a pair for mission-critical applications where downtime is not an option.
It executes real-time control logic, manages data traffic, and provides stable power distribution to peripheral sensors and actuators.
2. Technical Parameter Table
| Parameter | Specification |
| Model Number | D201505R (ACN C20 Series) |
| Input Voltage | 100–240V AC (Wide voltage design) |
| Output Voltage | 24V DC (Max 2A output for field devices) |
| Processor | High-performance multicore industrial CPU |
| Communication | PROFIBUS, Modbus, Ethernet/IP, and DNA Network |
| Safety Standard | Complies with IEC 61131-2 |
| Operating Temp | -10°C to +50°C |
| Protection | Industrial-grade vibration and dust resistance |
| Redundancy | 1:1 Hot-standby capability |
3. Related Models
The D201505R is part of the modern ACN (Automation Cloud Node) family:
D201505: The non-redundant version of the C20 controller.
D201463: A closely related network controller often used in similar rack architectures.
ACN C20: The broader series name for this generation of compact, powerful controllers.
D201376 / D201380: Larger ACN RT/MR nodes for plant-wide control.
4. Application Cases
Petrochemical Process Control: Managing temperature regulation in reaction kettles and fluid flow in complex refineries.
Energy Industry: Monitoring boiler pressure and steam flow in power plants, as well as automatic substation monitoring.
Manufacturing & Packaging: Driving robotic arms and multi-axis conveyor belts in high-speed assembly lines.
Water Treatment: Coordinating pump stations and valve openings while providing remote monitoring via Modbus.
Mining & Metallurgy: Controlling heavy-duty crushers (like Metso Nordberg series) where extreme vibration resistance is required.
| EMERSON | A6740 |
| EMERSON | KJ2221X1-BA1 |
| EMERSON | KJ4001X1-BE1 12P0818X072 REV:L |
| EMERSON | KJ4001X1-NA1 12P3373X012 REV:C |
| EMERSON | KJ4001X1-NB1 12P3368X012 REV:E |
| EMERSON | 5X00273G01 |
| EMERSON | CSI3125 A3125/022-020 |
| Emerson | KJ4110X1-BA1 |
| EMERSON | 1C31113G01 |
| EMERSON | 5X00846G01 |
5. Product Advantages and Features
Integrated Power Supply: Unlike standard CPUs that require a separate power module, the D201505R can provide 24V DC (up to 2A) directly to its local loops.
High Availability: The redundant “R” design allows for seamless failover, ensuring that a hardware fault in one controller does not stop the process.
Advanced Control Algorithms: Built-in support for high-precision PID loops and complex logic synchronization.
Robust Hardware: Encased in a solid industrial shell, it is rated for high-impact and humid environments common in pulp, paper, and mining.
Global Compatibility: The wide-range AC input allows it to be used in any region without needing specialized transformers.
6. Other Models in the Same Series
Within the ACN / Valmet DNA architecture, you will also find:
D201134: 16-channel Analog Input module.
D201135: Analog Output module.
AIF4V / AIF4E: Specialized vibration monitoring units (API 670 compliant) often used alongside C20 controllers.
D202275: Communication gateway for advanced IIoT and cloud connectivity.