Description
At-A-Glance Executive Brief
- Model: D201776 (ACN PO DC)
- Brand: Valmet (Formerly Metso Automation)
- Part Type: ACN (Application Controller Node) Process Operator industrial embedded controller / control server for Metso / Valmet DNA DCS
- Lifecycle status: EOL legacy pulp, paper and mining DCS critical spare; stocked for brownfield Valmet DNA cabinet maintenance
- System compatibility: Metso / Valmet DNA distributed control system; serves as application controller node, executes supervisory control, manages process historian data, handles redundant Ethernet communications between I/O controllers, field devices and operator HMI stations
- Weight: ~2.1 kg
Technical Introduction
Failure of D201776 ACN PO DC disables supervisory data management and high-level application control for the DNA DCS system. HMI visualization, process trending, alarm logging and inter-node data exchange will stop. Operators lose real-time plant visibility, and advanced sequence / batch control functions become unavailable, triggering operational blind spots, process upset risk and unplanned downtime for pulp, paper or mineral processing plants.
Valmet D201776 ACN PO DC is a rack-mounted embedded control server designed for the Metso DNA DCS platform. This ACN node runs supervisory and application-level automation functions, acts as a high-speed gateway between distributed local controllers and operator workstations. Equipped with redundant 10/100/1000Mbps Ethernet ports, it ensures resilient network communication for large process plants. It handles alarm management, continuous data trending, event archiving and batch recipe execution. Built for 24/7 continuous operation in industrial control rooms, it supports redundant deployment to maximize system availability. Pulp, paper and mineral processing reliability teams stock D201776 to restore supervisory control, data logging and HMI communication for legacy Valmet DNA systems.
- Best Suited For
- Metso / Valmet DNA DCS rack systems in pulp, paper and mineral processing plants
- Supervisory application control, redundant network gateway, alarm & trend data management
- Direct drop-in replacement for existing Valmet D201776 ACN PO DC control server hardware
Core Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | D201776 (ACN PO DC) |
| Manufacturer | Valmet (Metso Automation) |
| Product Type | ACN PO DC Application Controller Node / Industrial Control Server |
| Compatible Platform | Metso / Valmet DNA DCS |
| Primary Function | Supervisory application control, alarm/event logging, trending, redundant network routing, HMI data server |
| Network Interface | Redundant 10/100/1000 Mbps Ethernet |
| Processor | Industrial embedded CPU |
| Control Supply | 24 VDC |
| Mounting | Cabinet rack mount |
| Operating Temperature | 0℃ ~ +55℃ |
| Humidity | 5–95% RH non-condensing |
| Weight | ~2.1 kg |
| Environmental Details | Please refer to Valmet DNA hardware manual for full EMC, shock and vibration specifications for pulp & paper and mining environments. |
Field Engineer’s Tech Notes
- Confirm full part revision, DNA firmware version, network IP addressing, redundant network setup and application configuration backup before replacement; revision mismatch or incorrect network settings can cause loss of HMI connection and supervisory data.
- Implement process safety bypass for all critical control loops and safety interlocks before unit removal. Loss of ACN node will disable plant-wide trending, alarms and supervisory control functions.
- Inspect redundant Ethernet cables, network switches, cabinet cooling fans and dust filters; overheating, failed network ports and loose connections are common causes of intermittent ACN communication faults.
- After installation, verify 24VDC power-up, boot sequence, Ethernet link status, redundant network failover test, controller node communication, alarm and trend data collection. Validate HMI data display, clear faults and remove safety bypass before returning the system online.
- ESD protection required while handling the unit.
- Backup ACN configuration and perform redundant network failover testing during DCS preventative maintenance.
Adaptive QA & Testing Protocol
Each D201776 ACN PO DC control server is bench tested on Valmet DNA test rack. We verify 24VDC power boot, embedded system startup, redundant Ethernet connectivity, communication with DNA controller nodes, alarm and trend data transmission, and diagnostic status indicators. PCB, connectors and internal components are visually inspected for burn marks, corrosion or thermal damage. Full test reports are available upon request.
Buyer’s FAQ
Q: What is Valmet D201776 used for? A: It is the ACN PO DC Application Controller Node for Valmet (Metso) DNA DCS, functioning as supervisory control server, redundant network gateway and data historian node for pulp, paper and mining process automation.
Q: What warranty applies for refurbished and NSFP D201776? A: Refurbished and NSFP units carry a 12-month hardware warranty. Coverage excludes ESD damage, network surge damage, overheating, firmware/configuration mismatch 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 D201776 ACN controller units.
Q: Can D201776 be hot swapped? A: Not hot-swappable. 24V DC control power must be fully isolated before removal. Critical control loops and safety interlocks require safety bypass before replacement.
Q: Is D201776 still in production? A: No, Valmet DNA ACN series including D201776 is end-of-life legacy DCS hardware.
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