Description
Key Technical Specifications
- Processor Speed: 133 MHz
- Data Capacity: 120 KB
- Operating Voltage: 12 Volts DC
- Communication Interface: 10BASE-T Ethernet
- Environmental Rating: -20°C to 60°C Operating Temp
- Humidity Tolerance: 0-95% Non-condensing
- Physical Dimensions: 4.4 cm x 48 cm
- Weight: 1.5 kg
- Certifications: UL Listed
- Kit Components: Main board, optional memory daughter board, Media Interface Card (MIC), interconnect cable
Product Introduction
Upgrading legacy substation infrastructure without replacing the entire control architecture requires targeted expansion modules. The GE D20-EME serves as an Ethernet and Memory Expansion kit designed specifically for GE D20 and D200 substation controllers. It acts as a critical upgrade path, adding global memory and 10BASE-T Ethernet connectivity to support modern SCADA host protocols and IED integration.
This module operates at 133 MHz with a 120 KB data capacity, providing the necessary processing overhead for complex local automation logic and data concentration. It functions as a protocol converter and data concentrator, consolidating information from intelligent electronic devices and reporting upstream to master stations. Bottom line — it’s a cost-effective way to breathe modern network communication into existing D20/D200 hardware without a full panel retrofit.
QA/QC Transparency SOP
We validate these expansion modules to ensure they meet substation reliability standards:
- Intake & Origin Verification: We inspect the main board and MIC card to verify authentic GE manufacturing and check for physical damage or EMI routing violations.
- Live Functional Testing: The D20-EME is installed in a test chassis to verify successful boot-up, Ethernet link establishment, and memory recognition.
- Electrical Parameter Tests: We verify the 12V DC power draw and test the interconnect cable continuity between the main board and MIC card.
- Firmware/Config Verification: We read the module to log the current firmware revision, ensuring it is compatible with the target D20ME/ME II processor.
- Final QC & Anti-Static Packaging: The module is sealed in anti-static shielding and packed with rigid foam to protect the MIC interconnect pins during transit.
Field Engineer Gotchas
- Chassis Compatibility: Not all D20 VME chassis support the EME kit. Fix: Always check the chassis part number against the GE compatibility table before ordering. Part numbers like 500-0305 are strictly incompatible.
- Firmware Requirements: Upgrading from a GreenSpring Ethernet card to an EME card requires re-installing software into the D20ME/ME II processor. War Story: I’ve seen a tech rack the new EME card, power up, and get a blank console because they assumed it was a plug-and-play hardware swap. Always have the correct firmware image ready before starting the upgrade.
- EMI Cable Routing: The interconnect cable linking the EME main board to the MIC card MUST be routed inside the chassis. Fix: Routing this cable outside the enclosure will cause excessive EMI radiation and can interfere with the controller’s operation. Keep it strictly internal.
GE-D20-EME
Application Scenarios
- Substation Automation Upgrades: Adding Ethernet connectivity to legacy D20 controllers to integrate with modern SCADA and EMS systems without replacing the entire panel.
- Data Concentration: Consolidating data from multiple field relays and meters, converting protocols, and reporting upstream to a master station.
- Local Distribution Automation: Executing complex local logic for capacitor bank control, feeder resource optimization, and outage prevention programs.
FAQ
Q: Will this EME module work in my older D20 VME chassis?
It depends entirely on the chassis part number. Chassis 500-0280 (with or without the 953-3061 MX sub-assembly) and 500-0305 are NOT compatible. You must verify your exact chassis P/N against the GE compatibility list before purchasing.
Q: Do I need to update the firmware on my existing processor?
Yes. If you are upgrading from a GreenSpring Ethernet card to an EME card, you must re-install the software/firmware into the D20ME/ME II processor. Memory-only upgrades may only require a configuration change, but Ethernet upgrades mandate a firmware reload.
Q: Can I add memory to an existing EME card that doesn’t have memory installed?
No. The memory expansion daughter board cannot be used to add memory to a main card that was originally manufactured without memory. You must purchase a main board that already includes the base memory.
Q: What power supply requirements should I check before installing?
Verify that your existing D20 power supply can handle the additional load of the EME module. If the power supply is already near its maximum capacity, adding Ethernet and memory expansion could cause brownouts. Contact GE or your supplier for assistance if you are unsure about your power budget.
Q: Does this module support Gigabit Ethernet?
While some marketing literature mentions gigabit capabilities, the specific 10BASE-T variant (D20 EME 10BASE-T) is designed for standard 10 Mbps Ethernet communication. Verify your network infrastructure matches the module’s native 10BASE-T specification.
