GE D20 EME 27-APR-13 Substation Controllers
GE D20 EME 27-APR-13 Substation Controllers

GE D20 EME 27-APR-13 Substation Controllers

GE D20 EME 27-APR-13 Substation Controllers

Brand： General Electric

Product ID： D20 EME 27-APR-13

Condition： New / used

Terms of payment： Paypal、T/T 、Western Union

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Description

GE D20 EME 27-APR-13

I. Basic Information


Model: D20 EME | Production Date: 27-APR-13 (Original US factory release on April 27, 2013) | Part Number: 2400-21004Brand: GE General Electric (GE Energy, USA), belonging to WESDAC D20/D200 series of power RTU main control modules.EME stands for Ethernet + Memory Expansion main control board. It is the core communication CPU card for D20 rack systems, an in-stock industrial spare part manufactured in 2013 and specially used for renovation of legacy D20 systems in substations and power plants.
Installation: Plug-in installation via rear-side bus on standard D20 rack slots; Dimensions: 225×135×30mm, Net Weight ≈0.42kg. The PCB is coated with military-grade triple-proof conformal coating with IP20 protection for cabinet mounting, approved per UL and IEC standards for grid access.
Supporting Software: D20 Config & Toolbox configuration software with factory-default firmware version released in 2013, fully compatible with all D20 rack hardware variants.
Onboard Hardware: 10/100Mbps auto-adaptive RJ45 Ethernet port, RS232 + RS485 serial ports, dedicated D20 backplane parallel bus, tri-color RUN/FAULT/COM status LED indicators and fully populated onboard RAM/Flash memory chips.


II. Technical Specifications


1. Main Controller & Memory

32-bit dedicated industrial processor designed for power industry applications; Factory pre-configured with 8MB RAM + 16MB Flash, expandable up to maximum 16MB RAM / 32MB Flash via hardware upgrade (this 2013 batch is fully factory expanded).Logic scan cycle: 2~10ms; Minimum telemetry sampling cycle: 100ms, supporting four core remote functions of power automation: telesignalling, telemetry, remote control and remote regulation.Equipped with hardware watchdog, memory checksum verification and backplane short-circuit self-test; communication gets locked with front-panel fault indicator alarm upon hardware failure.


2. Communication Interfaces

  • RJ45 Ethernet: 10/100BASE-T, supporting IEC61850, Modbus TCP and DNP3.0 TCP for connection with dispatching SCADA and DCS platforms.
  • Serial Ports (RS232/RS485): Compatible with Modbus RTU, serial DNP3 and IEC 60870-5-101 for local connection with protection relays and smart field instruments.
  • D20 Backplane Bus: A single backplane supports up to 16 DI/DO/AI/AO I/O daughter cards to realize full-rack data exchange.


3. Electrical Parameters

Power Input: DC24V (wide operating range:18~32VDC), total power consumption ≤7W. Onboard galvanic isolation plus surge and Level-3 EMC protection to withstand intensive electromagnetic interference inside substation environments.


4. Environmental Ratings

Operating Temperature: -20℃ ~ +70℃; Storage Temperature: -40℃ ~ +85℃;Ambient Humidity: 5%~95% RH non-condensing; Vibration resistance: 5g (5~500Hz), compliant with national standards for power local control cabinet working conditions.


5. Maximum I/O Capacity with This EME Controller

  • AI: 64 channels (4~20mA / 0~10V, precision ±0.1% FS)
  • DI: 128 channels DC24V dry contact input with wire-break detection, response time ≤1ms
  • DO: 64-channel relay output (5A@250VAC contact rating)
  • Pulse Counter: 32 channels, max 1kHz input for energy pulse collection



III. Key Features


  1. Standard retrofit component for legacy D20 network upgrade: Original early-generation D20 CPUs have no onboard Ethernet; the 2013-version EME is the exclusive expansion card to add Ethernet and upgrade communication to IEC 60870-5-104 over TCP/IP.
  2. Large-capacity onboard storage for millisecond-timestamped SOE records, fault oscillography data and multi-group parameter setpoint backup.
  3. Multi-protocol gateway conversion: Serial IEC101 to Ethernet IEC104, cross conversion between Modbus and DNP3 to enable interconnection of heterogeneous power automation devices.
  4. Rack hot-swap capability: Spare card replacement without rack power outage at identical slots; supports online program download and live troubleshooting.
  5. Full-channel fault reporting: Wire-break faults on DI/AI and short-circuit faults on DO trigger local LED indication plus remote alarm upload to upper SCADA system.


IV. Operating Principle


DC24V rack supply powers the EME controller via backplane bus;Downstream acquisition: The controller polls DI and AI modules over backplane bus to collect field discrete status and analog process values, while onboard CPU executes interlock logic and over-limit alarm algorithms;Upstream transmission: Collected data is encapsulated per IEC104/DNP3 protocols and uploaded to dispatching SCADA via Ethernet or serial ports;Downstream remote control: Remote commands issued by dispatch center are parsed by EME, forwarded through backplane bus to DO cards to actuate on-site circuit breakers and field actuators.


V. Application Scenarios


  • Modernization renovation of D20-RTU equipment for 10kV/35kV distribution substations and switchyards (2013 batch widely used for upgrade projects of domestic substations commissioned between 2009~2014).
  • Auxiliary control of station service power and monitoring for high/low-voltage switch cabinets in thermal & hydropower plants.
  • SIS matching monitoring and UPS system upgrade for power substations inside chemical & oil/gas industrial parks.
  • Replacement spare for in-service D20 systems (27-APR-13 denotes mass-production batch from original factory in 2013, mainstream model for field spare replacement).

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