Description
Metso Automation A413016 NCU2 Circuit Board
Product Introduction
A controller fault in an older Metso automation installation does not always point to the main CPU. Network/interface circuitry can produce communication loss, rack-level alarms, or intermittent system behavior that initially looks like a software problem. Metso Automation A413016 is identified as an NCU2 circuit board assembly, with industrial spare-parts records associating the board with Metso/Valmet/Neles Automation systems.
Revision control matters with this part. Documented inventory examples include A413016 Rev. 08 and Rev. 09, while other records identify Ver. 12 hardware. One current industrial listing describes the A413016 NCU2 as a Network I/O Processor. These references establish the board identity, but they do not provide enough reliable information to publish a universal electrical specification for every revision.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | A413016 |
| Manufacturer / Brand | Metso Automation / Valmet Automation |
| Alternate Association | Neles Automation |
| Board Designation | NCU2 |
| Product Type | Circuit Board Assembly / PLC Board |
| System Function | NCU2 control/network interface |
| Revision Examples | Rev. 08, Rev. 09; other versions reported |
| System Application | Legacy Metso/Valmet automation and DCS environments |
| Product Status | Discontinued / legacy |
| Exact Supply Voltage | Verify from installed hardware documentation |
| Exact I/O Configuration | Verify against system configuration |
| Communication Interface | Verify by revision and system documentation |
| Operating Temperature | Verify against applicable hardware documentation |
Important specification note: public records consistently identify the A413016 as an NCU2 board, but the available sources do not provide a sufficiently authoritative common specification for voltage, I/O count, communications protocol, or environmental limits. Those values should not be assumed from another Metso board in the same A413xxx family.
Application Scenarios & Pain Points
The is primarily relevant to maintenance of installed legacy Metso/Valmet control systems rather than new control-system engineering.
- board replacement: Used when an installed circuit board develops a hardware fault or fails diagnostic testing.
- Legacy DCS maintenance: Supports continued operation of older Metso automation installations where a complete control-system migration is not yet scheduled.
- Communication fault investigation: Appropriate when troubleshooting system-level communication or network/interface symptoms associated with the hardware.
- Shutdown spare planning: A verified spare can be useful when an aging installation has limited replacement options.
Field Note
When an -related fault appears, do not immediately swap the board and declare the problem solved. First record the existing revision, board identifiers, connector condition, diagnostic indicators, and the exact system location. If the replacement revision differs, establish compatibility before applying power.
A413016
Related Products
The following Metso/Valmet components are useful reference points when reconstructing the surrounding legacy control architecture:
- A413001 — Metso/Valmet CPU board family; a processor-related component rather than an replacement.
- A413070 — Valmet Automation CPU central processor module; verify system generation before considering any relationship.
- A413082 — Valmet Automation CPU central processor module; different board function from .
- A413125 — AIU8 analog input board; field-input function rather than control/network circuitry.
- A413143 — BIU84 board; binary-input-related hardware in the same broader spare-parts family.
- A413171 — PIC board; another Metso/Valmet control-system board.
- A413187 — AIH8 analog input board.
- A413325 — IPU power-supply module; power hardware, not a direct substitute for .
These part numbers belong to related Metso/Valmet automation hardware families, but similar A413xxx numbering does not establish interchangeability. The installed system configuration and board revision remain the controlling factors.
Engineer’s Guide — Field Pitfalls to Avoid
1. Do not ignore the revision number
records show multiple revisions, including Rev. 08 and Rev. 09. Other listings show later version numbering.
Procurement rule: specify the complete identification as shown on the installed board, not simply “.”
2. Do not treat every A413xxx board as interchangeable
Metso used the A413xxx designation across many different circuit-board functions. An A413125 analog-input board, A413171 PIC board, or A413325 power-supply module cannot be selected simply because the base numbering looks similar.
Before ordering: photograph the complete board label and compare every visible identifier.
3. Verify the system role before removing the existing board
An board may participate in system-level control or network functions. Pulling the wrong board during an operating plant can create a larger outage than the original fault.
Maintenance practice: document rack position, cable routing, connector locations, and diagnostic status before removal.
4. Do not assume a later revision is automatically plug-compatible
A later revision may be electrically compatible, but that should be established from system documentation rather than assumed from the same base part number.
For a revision change: verify firmware requirements, configuration data, connector assignments, and commissioning procedure.
5. ESD handling matters
This is exposed electronic circuitry. Static discharge, contamination, and poor handling can create failures that are difficult to distinguish from an existing board fault.
Use: ESD-safe handling, appropriate packaging, and controlled bench testing before installation.
6. Verify the replacement board’s condition
Legacy inventory can appear as used, surplus, or refurbished hardware. One documented Rev. 09 listing specifically identifies the unit as used, while another listing describes an apparently unused unit.
Receiving inspection: confirm the exact revision, inspect edge connectors and PCB condition, check for corrosion or component damage, and request functional test evidence when available.
FAQ
What is Metso Automation ?
is identified as an circuit board assembly used in Metso/Valmet Automation systems. Industrial records classify it as a PLC/control-system board, and some listings identify the as a Network I/O Processor.
Is a CPU module?
It should not automatically be described as the main system CPU. The available records identify it specifically as an , while other A413xxx numbers are explicitly identified as CPU boards. Treating as a generic CPU replacement can lead to an incorrect procurement decision.
What revisions are available for ?
Public inventory records document at least Rev. 08 and Rev. 09, and other spare-parts records show a Ver. 12 . Because revision-specific technical information is limited, the revision on the installed unit should be captured before purchasing.
Is discontinued?
A major industrial parts database identifies as discontinued by the manufacturer and describes it as a circuit board assembly (). This means replacement sourcing should be handled as legacy-equipment procurement rather than assuming current factory availability.
Can another A413xxx board replace ?
Not on part-number similarity alone. A413xxx components perform different functions, including CPU, analog input, binary input, PIC, and power-supply functions. A confirmed replacement needs to match the system role and applicable hardware revision.
What information should I request before buying an ?
Request photographs of the complete part-number label, revision/version marking, PCB identifiers, connectors, and overall board condition. If the supplier claims compatibility with a different revision, ask for the specific compatibility basis rather than accepting a generic “replacement” statement.
Should a used be tested before installation?
Yes. For a legacy control board, visual condition is not enough. Where practical, verify the board through a controlled test process and confirm that the revision and configuration are appropriate for the target system before returning the plant to service.
