A413016 | Metso Valmet NCU2 Local Controller Processor Board NSFP Refurbished

Description

At-A-Glance Executive Brief

• Model: A413016
• Brand: Valmet (Formerly Metso Automation)
• Part Type: NCU2 (Network Control Unit) local distributed controller / processor board for Damatic XDi DCS
• Lifecycle status: EOL legacy pulp & paper DCS critical spare; stocked for brownfield pulp, paper and fiber line Damatic XDi cabinet maintenance
• System compatibility: Metso Damatic XDi distributed control system; functions as local control node, scans I/O modules, executes regulatory and sequence control logic, communicates over X-bus to operator stations and higher-level supervisory nodes
• Weight: ~0.52 kg

Technical Introduction

Failure of A413016 NCU2 disables the local control node. I/O scanning, closed-loop regulation, interlock logic and X-bus network communication will stop for the associated process section. Paper machine speed, basis weight, digester or fiber line control loops are lost, triggering process upset, web breaks, unplanned mill downtime and risk to process safety interlocks.

Valmet A413016 is the NCU2 Network Control Unit processor board for Metso Damatic XDi DCS, widely deployed in pulp and paper mills. This distributed control node plugs into the Damatic XDi rack backplane and directly interfaces with local I/O modules. It executes real-time function block control, sequence logic and fault diagnostics locally, reducing dependency on a central controller. The PCB is conformal coated for dust and high humidity resistance typical in pulp/paper control rooms. It communicates with other NCU nodes and operator HMI via the proprietary X-bus highway. It manages continuous process regulation, alarm generation and event logging for paper machines, digesters, bleach plants and fiber processing lines. Pulp & paper reliability teams stock A413016 to restore local autonomous control and network communication for Damatic XDi process sections.

• Best Suited For
  • Metso Damatic XDi DCS racks in pulp, paper and fiber processing plants
  • Distributed local control node, closed-loop regulation, sequence control and X-bus network communication
  • Direct drop-in replacement for existing Valmet A413016 NCU2 Network Control Unit hardware

Core Technical Specifications

Field Engineer’s Tech Notes

• Confirm full part revision, Damatic XDi firmware version, node address, control application program and rack I/O mapping before replacement; revision mismatch or incorrect node addressing causes boot failure or loss of process control.
• Implement full process safety bypass for all control loops and safety interlocks before removing the NCU2 board. Loss of this node will disable all associated regulatory and sequence control.
• Inspect X-bus network cables, terminators, rack backplane connectors and cabinet air filters; dust buildup, moisture and improperly terminated X-bus are common causes of intermittent NCU communication faults.
• After installation, verify 24VDC power-up, board boot sequence, X-bus network registration, I/O module detection and application program download. Test closed-loop control response, alarm generation and HMI data exchange, clear faults and remove safety bypass before returning the process section online.
• ESD protection required while handling PCB assembly.
• Backup NCU application logic and perform X-bus network health checks during mill DCS preventative maintenance.

Adaptive QA & Testing Protocol

Each A413016 NCU2 processor board is bench tested on Damatic XDi test rack. We verify 24VDC power boot, X-bus network communication, I/O backplane scanning, application logic execution, alarm and diagnostic LED operation. PCB, edge connector, conformal coating and solder joints are visually inspected for burn marks, corrosion or thermal damage. Full test reports are available upon request.

Buyer’s FAQ

Q: What is Valmet A413016 used for? A: It is the NCU2 Network Control Unit local processor board for Damatic XDi DCS, acting as a distributed control node to run process control logic, scan local I/O and communicate over X-bus in pulp and paper mill systems.

Q: What warranty applies for refurbished and NSFP A413016? A: Refurbished and NSFP units carry a 12-month hardware warranty. Coverage excludes ESD damage, moisture corrosion, firmware/application mismatch, X-bus termination errors and improper safety bypass.

Q: What lead time should I expect? A: Stocked units ship 3–7 business days. If inventory depleted, we source surplus Valmet A413016 NCU2 boards.

Q: Can A413016 be hot swapped? A: Not hot-swappable. Rack 24V control power must be isolated before removal. All critical control and interlock loops require safety bypass before replacement.

Q: Is A413016 still in production? A: No, Damatic XDi series including A413016 NCU2 is end-of-life legacy DCS hardware.