Description
Core Product Summary
The Metso D202593L (designated as the ACN CS G2 lacquered base controller unit) is a high-performance, multifunction embedded industrial controller engineered for deployment within Metso DNA and Valmet distributed control system (DCS) architectures. Built for demanding process control, fast machine automation, and multivariable control loops, the controller features a fanless, solid-state architecture utilizing passive heat-pipe cooling to maximize operational reliability in harsh industrial plants.
Equipped with robust processing capabilities, flexible PCIe expansion card slots, and integrated lacquered circuit protection for corrosive or humid environments, the D202593L handles complex system tasks while communicating natively across redundant Ethernet networks and fieldbus interfaces. It operates on a flexible DC power input window and supports 1:1 controller redundancy configurations to ensure uninterrupted availability in continuous production facilities such as power generation and pulp and paper plants.
Key Technical Specifications
| Parameter | Specification Details |
| Manufacturer | Metso / Valmet Automation |
| Model / Part Number | D202593L (ACN CS G2 Lacquered Base Unit) |
| Product Type | Embedded Industrial Process Controller Module |
| System Compatibility | Metso DNA / Valmet Distributed Control System (DCS) |
| Processor & Memory | Intel Celeron M440 processor, 2 GB DDR3 RAM (1333 MHz) |
| Storage Media | Removable 2 GB SD card slot |
| Expansion Slots | 2 × PCIe x4 expansion card slots |
| Communication Interfaces | 3 × Ethernet ports (10/100Base-T), 1 × RS-232 serial port, 4 × USB ports |
| Display / Aux Ports | 1 × DVI-I (VGA), 1 × alarm input |
| Input Voltage Range | +10 V to +32 V DC |
| Cooling Method | Fanless construction via massive heat sink and heat pipes |
| Dimensions (W × H × D) | 210 mm × 87 mm × 296 mm (8.27 in × 3.43 in × 11.65 in) |
| Weight | Approximately 4.5 kg (9.9 lbs) |
| Enclosure Rating | IP20 (with specialized lacquered coating variant for demanding environments) |
| Operating Temperature | 0 °C to +50 °C (+32 °F to +122 °F) |
Detailed Product Overview
The Metso D202593L ACN CS G2 controller functions as a central computing and network routing node within modern Valmet DNA industrial control hierarchies. Powered by an embedded Intel Celeron processor architecture running a deterministic real-time operating system, the module delivers fast control cycles—scaling down to 20 ms—making it suitable for rapid closed-loop regulation, sequential logic handling, and complex multi-variable control strategies.
Designed with a robust, fanless sheet-steel housing, the D202593L relies entirely on thermal heat pipes and external fins to dissipate heat, eliminating moving parts that are prone to mechanical wear. The “L” designation indicates a specialized lacquered finish applied to internal electronics, offering enhanced resistance against ambient moisture, chemical vapors, and dust prevalent in heavy industrial settings. Two PCIe expansion slots allow engineers to customize the node’s interface profile by inserting specialized communication cards, such as PROFIBUS DP, Foundation Fieldbus HSE, or additional serial communication modules.
Network connectivity is handled through multiple switched Ethernet ports configured for ring or star topologies, enabling seamless integration into redundant plant-wide automation loops. In the event of primary network or link degradation, the system triggers automatic changeovers to reserve data paths within milliseconds. Furthermore, the controller supports 1:1 redundancy configurations, pairing twin units to ensure zero downtime during maintenance cycles or unexpected component faults.
D202593L
D202593L
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
| Control System Platform | Metso DNA / Valmet ACN I/O and DCS architecture | Requires matching system software version and valid node base licenses. |
| Power Supply Input | +10 V to +32 V DC regulated supply rail | Must be sourced from an appropriately rated industrial power supply unit. |
| Cabinet Mounting | 19-inch rack mounting shelf or vertical panel plate | Requires secure screw fastening and vertical orientation for proper convective airflow. |
| Fieldbus / I/O Expansion | Valmet DNA EFC connection units, PROFIBUS DP, FF HSE | Installed via internal PCIe expansion cards depending on network topology. |
Dimensions, Mounting & Connection Notes
- Physical Dimensions: Measures 210 mm wide × 87 mm high × 296 mm deep (8.27 in × 3.43 in × 11.65 in).
- Weight: Weighs approximately 4.5 kg (9.9 lbs).
- Mounting Configuration: Can be installed vertically on a mounting plate using screws or positioned on a shelf inside a standard 19-inch industrial control cabinet.
- Thermal Management: Fanless design requires adequate vertical clearance above and below the heat sink fins to maintain unobstructed convective air circulation.
- Connection Layout: Front and back panel interfaces include power terminals, alarm inputs, three 100Mbit/s Ethernet ports, USB ports, a DVI-I display connector, and an RS-232 setup/redundancy link.
FAQ
What is the Metso D202593L?
The D202593L is an ACN CS G2 embedded industrial controller module manufactured for Metso DNA and Valmet distributed control systems.
What does the “L” designation signify on this model?
The “L” suffix denotes a lacquered circuit board variant designed to protect internal electronics against harsh, humid, or corrosive industrial environments.
What processor and operating system does the controller utilize?
The unit features an Intel Celeron M440 processor combined with 2 GB of DDR3 RAM, a removable 2 GB SD card, and a deterministic real-time operating system.
What power supply range does the D202593L require?
The controller operates on a DC voltage input window ranging from +10 V to +32 V DC.
How does the controller handle physical cooling without a fan?
It utilizes a fanless solid-state construction that transfers heat away from internal components using embedded heat pipes and a massive external aluminum heat sink.
Can the controller connect to external fieldbuses?
Yes, the module supports fieldbus integration (such as PROFIBUS DP and Foundation Fieldbus HSE) via its two internal PCIe expansion slots.
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