The METSO A413654 is a specialized industrial control component, specifically identified as an NCU2 (Network Control Unit) or Central Control Module.

It is used within the Valmet/Metso DNA automation systems, which are common in heavy industries like mining, pulp & paper, and power generation.

1. Product Description

The METSO A413654 (NCU2) is a high-performance central control module designed to manage data communication and logic execution within a Distributed Control System (DCS).

It acts as a “brain” or a critical communication bridge between various I/O modules and the higher-level monitoring system.

Manufacturer: Valmet / Metso Automation (often branded as Neles/Valmet)

Part Type: Central Control Module / NCU2 Processor Board

Function: Handles system-level communication, diagnostic processing, and interface management for industrial automation networks.

2. Technical Data Sheet (Specifications)

Parameter	Specification
Model Number	A413654
Designation	NCU2 (Network Control Unit 2)
Input Voltage	System bus-powered (typically 24V DC environment)
Weight	Approx. 1.7 kg
Indicator Lights	Front-panel LEDs for Power, Run, Fault, and Link status
Communication	High-speed Ethernet and proprietary Metso fieldbus support
Environment	Operating temp 0°C to +50°C; non-condensing humidity
Country of Origin	Finland

3. Related Models

The A413654 is part of a modular family. It is frequently seen alongside:

A413110 (TIU6): Terminal Interface Unit often paired with this control module.

A41365x Series: Various iterations of processor and communication boards.

IOP345: Digital Input Modules that feed data into the NCU2.

Valmet DNA AC800M: Larger scale controllers that may integrate with these legacy boards.

A413654

4. Application Cases

Mining & Aggregates: Monitoring and controlling Metso Lokotrack® mobile crushing plants and Nordberg® NP Series impactors.

Pulp & Paper: Managing process logic in Valmet-controlled paper mills, where high-speed synchronization is required for the web press.

Oil & Gas: Integrating safety systems and process automation for Neles valve assemblies in offshore or refinery settings.

Power Generation: Used in DCS systems for coal-fired or renewable power plants to monitor turbine and generator parameters.

5. Product Features and Advantages

Real-time Diagnostics: Provides immediate feedback via onboard LEDs, allowing technicians to identify network or power faults instantly.

High Reliability: Designed for “always-on” industrial environments where system downtime can cost thousands of dollars per hour.

Network Stability: The NCU2 architecture is optimized for stable data throughput even in high-interference (EMI) industrial zones.

Backward Compatibility: Often used as a drop-in replacement or upgrade for older NCU units, extending the life of existing Metso DNA systems.

6. Other Models in the Same Series

A413651 / A413652: Earlier versions or specific variants of the NCU processor series.

A413100: Basic interface cards.

Valmet I/O Series: Analog and digital modules that share the same backplane and control logic architecture.