METSO A413665 Active Control Unit (ACU) / Processor Module

The METSO A413665 is a critical electronic module within the Valmet / Metso DNA (formerly Metso Automation) system. 

 It is specifically categorized as an ACU (Active Control Unit) or a high-level Processor/Communication Board used to manage sophisticated industrial automation tasks.

1.  Product Description

The METSO A413665 serves as a core processing component in the Metso DNA distributed control system.

  It is designed to execute complex control algorithms and manage high-speed data exchange between field devices and the operator interface.

Type: Active Control Unit (ACU) / Processor Module.

Manufacturer: Metso Automation (now Valmet).

Role: Acts as the primary logic controller or communication hub for a specific segment of the industrial process.

Form Factor: Industrial-grade PCB mounted within a ruggedized housing for rack installation.

2.  Technical Data Sheet (Specifications)

3.  Related Models

The A413665 is often found in systems alongside these common components:

A413654 (NCU2): Often works in tandem with Network Control Units for wider system connectivity.

A413110 (TIU6): Used for terminal interface and I/O routing.

Neles ND9000: Intelligent valve controllers that communicate with the A413665.

Metso I/O Modules: Analog (AI/AO) and Digital (DI/DO) cards that report directly to this control unit.

4.  Application Cases

Mining & Metal Refining: Used in the control loops of large-scale grinding mills and flotation cells where precise timing is essential.

Pulp & Paper Processing: Managing the high-speed "Wet End" control and "Dry End" quality monitoring in Valmet paper machines.

Chemical & Petrochemical: Controlling safety-critical sequences and maintaining pressure/temperature stability in reactor vessels.

Power Plant Automation: Managing burner control systems and steam turbine monitoring in combined-cycle power plants.

5.  Product Features and Advantages

High Processing Speed: Capable of handling hundreds of PID loops and logic sequences simultaneously with minimal latency.

Industrial Hardening: Specifically designed to resist electromagnetic interference (EMI) and vibration commonly found in heavy industrial plants.

Hot-Swap Capability: In redundant configurations, these modules can often be replaced without shutting down the entire control process.

Advanced Diagnostics: Provides deep-level system logs that can be accessed remotely for predictive maintenance.

Scalability: Allows for the expansion of the Metso DNA system by simply adding more units to the network.

6.  Other Models in the Same Series

The Metso/Valmet A413xxx series includes several specialized boards:

A413660 / A413662: Alternative processor or memory variants within the ACU family.

A413000 Series: Various power supply and bus-coupling modules.

DCN / ACN Series: Active Control Nodes that represent the modern evolution of the A413 series architecture.