GE Grid Solutions D20-EME-27-APR-13 – Ethernet Communications Module for D20/D200 RTU Platforms

The D20-EME-27-APR-13 is part of the GE D20/D200 family, used widely in substations and utility automation. It functions as an Ethernet communications module for the D20 rack, allowing the controller to speak modern IP-based protocols to SCADA, protection, or asset management systems. One thing I appreciate is how it integrates into existing D20 installations with minimal disturbance—typically a straightforward swap if you’re maintaining a fleet of legacy D20s.

Company’s Order Placement Process and Guarantees

• Warranty period: 365 days
• Delivery time: 1 week for in‑stock; no more than one month at the latest
• Payment: 50% advance payment, full payment prior to delivery
• Express delivery: FedEx, UPS, DHL

Key Features

• Ethernet enablement for D20/D200 – Typically adds a 10/100Base‑TX RJ45 interface to connect the RTU to station LANs.
• Utility SCADA protocol support – Commonly used with DNP3 over TCP, IEC 60870‑5‑104, and Modbus TCP (as licensed on the host D20).
• Backplane-powered module – No external power input; draws from the D20 rack for cleaner wiring.
• Fleet sustainment – Ideal as a spare or upgrade for long‑running D20 installations where a full platform change isn’t practical.
• Stable performance in substations – Designed for utility environments, typically supporting wide ambient temperatures and electrical noise immunity.

Technical Specifications

Application Fields

From my experience, this module is used where D20 RTUs need a clean IP interface to the station network:

• Substation SCADA gateways (transmission and distribution)
• Feeder automation, recloser and switch control panels
• Generation plant auxiliary systems monitoring
• IEC 60870‑5‑104 or DNP3/TCP integration to control centers
• Life‑extension programs for legacy GE D20 fleets

Advantages & Value

• Reliability – The D20 ecosystem is proven in utility substations; this module typically runs for years with minimal attention.
• Compatibility – Designed for D20/D200 racks; keeps protocol behavior consistent with existing SCADA configurations.
• Cost control – A targeted spare often avoids a full RTU replacement, saving engineering time and re‑commissioning costs.
• Supportable – Works with established D20 configuration workflows, making it easier for maintenance teams to manage.

Installation & Maintenance

• Panel/cabinet – Mount the D20 rack in a ventilated IEC/ANSI cabinet. Maintain clearance for cable bend radius and airflow.
• Power & grounding – Follow the D20 grounding scheme; ensure shielded Ethernet cabling where station EMI is present.
• Handling – ESD precautions are a must. From my experience, powering down the rack before card swaps avoids backplane stress.
• Network setup – Assign IP address, subnet, and gateway; enable protocols (e.g., DNP3/TCP or IEC‑104) in your D20 configuration tool; document MAC/IP for asset records.
• Routine care – Periodically check connectors, clean dust, verify time sync and protocol sessions, and update firmware where applicable and approved by your standards.

You might notice that crews value how quickly it goes back into service. A utility maintenance team told us they swapped an EME card and restored comms in under 15 minutes because the configuration was already standardized across their sites.

Quality & Certifications

• Manufacturer quality standards: typically CE compliant; UL/cUL or CSA listings are common on D20 assemblies
• RoHS status may vary by hardware revision; confirm for the exact build code if required by your site standards
• Warranty: 12 months (365 days)

Related Compatible Components (for planning)

• GE D20CPU / D20MX controller cards
• GE D20C backplane and power supply modules
• I/O cards such as D20AIO, D20K, D20S for analog/discrete expansion
• Managed substation Ethernet switches for redundant station LANs