GE WESDAC D20ME Substation Automation Controller

Description

Technical Specifications

Core Processing & Memory

• Processor: 32‑bit RISC processor (40 MHz)
• System Memory: 512 KB SRAM (volatile working memory)
• Non‑Volatile Storage: 2 MB Flash memory (for firmware, configuration, and critical data retention)
• Alternative Configuration: 1.5 MB SRAM + 2 GB Flash (high‑capacity variant)

I/O & Scalability

• I/O Capacity: Supports up to 4,000 expandable I/O points (digital, analog, RTD, and counter)
• I/O Compatibility: Seamless integration with GE D20/D200 series I/O modules (DI, DO, AI, AO, RTD)
• Chassis Compatibility: Designed for GE D20/D200 series modular chassis

Communication Interfaces

• Serial Ports: 7 × RS‑232/RS‑485 (configurable)
• Proprietary Links: 2 × D.20 Link HDLC (for peer‑to‑peer and I/O expansion)
• Supported Protocols:
  • Power industry: DNP3, IEC 60870‑5‑104, Modbus
  • Industrial: Modbus RTU/TCP, Profibus DP (optional)
• Networking: Ethernet/IP, Profinet, Modbus TCP (dual redundant Ethernet support)

Power & Physical

• Power Input: 24 VDC ±15% (dual redundant power input)
• Power Consumption: Typical 25 W, Maximum 35 W
• Form Factor: Modular rack‑mountable (compatible with D20 chassis)
• Dimensions: 230 mm × 160 mm × 80 mm
• Weight: Approx. 1.5 kg
• Mounting: DIN‑rail (35 mm) or bolt‑fixed installation
• Protection: IP20 (module‑level)

Environmental Ratings

• Operating Temperature: -25°C to +70°C
• Storage Temperature: -40°C to +85°C
• Relative Humidity: 5%–95% RH (non‑condensing)
• Vibration/Shock: Industrial‑grade ruggedization for high‑vibration environments
• EMC Compliance: EN 61000‑6‑2 (industrial immunity)

Certifications & Standards

• Safety: IEC 61508 (SIL 3), CE, UL
• Programming: IEC 61131‑3 compliant
• Power Industry: IEC 61850 (substation automation), DNP3, IEC 60870‑5

Key Features

• Real‑Time Deterministic Control: Sub‑millisecond control cycle for critical grid protection and automation
• Modular & Scalable Architecture: Supports large‑scale I/O expansion up to 4,000 points for system growth
• Multi‑Protocol Communication: Native support for power and industrial protocols ensures seamless SCADA and third‑party integration
• Redundancy Capabilities: Dual power and network redundancy for high‑availability operation
• Industrial Ruggedness: Wide temperature range and high EMC immunity for harsh substation and plant environments
• IEC 61131‑3 Programming: Supports standard languages (LD, FBD, ST) for flexible control logic development
• Built‑in Diagnostics: Comprehensive self‑test and health monitoring for proactive maintenance
• Long‑Term Support: Designed for legacy system sustainment and modernization projects

Application Scenarios

• Substation Automation: Primary controller for distribution and transmission substations, handling protection, control, and data acquisition
• Power Grid Monitoring: SCADA integration for real‑time grid status, fault detection, and load management
• Distribution Automation: Feeder control, recloser coordination, and smart grid automation
• Industrial Power Management: Plant power distribution, motor control centers (MCC), and critical load monitoring
• Renewable Energy: Wind and solar farm grid interconnection, power quality monitoring, and inverter control
• Oil & Gas: Pipeline monitoring, compressor station control, and remote terminal unit (RTU) applications
• Water & Wastewater: Pump station control, SCADA integration, and process automation
• Legacy System Modernization: Upgrading aging substation and industrial control systems with reliable, standards‑compliant hardware