GE D20 EME 27-APR-13 | Ethernet/Memory Expansion Module | D20/D200 RTU

GE D20 EME 27-APR-13 Ethernet/Memory Expansion Module

The GE D20 EME is a VME-based Ethernet/Memory Expansion module for the GE D20/D200 substation RTU platform. GE documentation states that the D20EME combines Ethernet support with global memory expansion and is available in Ethernet-only, memory-only, and combined Ethernet-and-memory configurations.

The “27-APR-13” portion appears to be a date marking associated with the specific unit, rather than the D20 EME catalog number. It should not be treated as a separate GE model number without confirming the physical nameplate.

Technical Specifications

GE’s current D20/D200 cross-reference confirms the multiple D20 EME configurations and their legacy catalog numbers.

GE D20 EME 27-APR-13

Product Overview

The D20 EME (Ethernet/Memory Expansion) is designed to extend the communications and memory capabilities of a GE D20 or D200 RTU. GE describes it as a VME-based module that allows D20/ systems to connect directly to a 10 MB Ethernet-based network.

The module is available in several hardware configurations. GE’s spare-parts cross-reference identifies:

Therefore, “D20 EME” alone does not identify the memory capacity or exact hardware configuration.

Application

The D20 EME is used in substation automation and SCADA/RTU systems where D20 or controllers require Ethernet connectivity and/or expanded global memory. GE documentation describes the D20/ platform as a substation controller family for collecting field data, processing information, and communicating with supervisory systems.

The EME can be used for:

• Ethernet connectivity for legacy D20/ systems
• Global memory expansion
• D20/ modernization and upgrade projects
• Replacement of an existing Ethernet/memory expansion assembly

Compatibility and Replacement

The exact EME configuration should be confirmed before ordering a replacement. GE documents specifically note that upgrading a D20 VME or from an earlier Ethernet card to an Ethernet EME can require software reinstallation in the D20ME/D20ME II processor. GE also notes that adding Ethernet to an existing D20 VME requires checking whether the D20 power supply can handle the additional load.

For replacement procurement, verify:

Important Identification Note

For the specific entry “GE D20 EME 27-APR-13,” I recommend recording it in inventory as:

GE D20 EME Ethernet/Memory Expansion Module — Date Marking: 27-Apr-2013

The date should not be described as a firmware version unless the unit’s label explicitly identifies it as such. A third-party listing claims that 27-Apr-2013 is a firmware/batch date, but this is not corroborated by the GE documentation I found. GE’s official documentation instead defines D20 EME by its hardware configuration and legacy catalog numbers.

Lifecycle Considerations

The D20 EME belongs to the legacy D20/ RTU platform. GE continues to publish D20/ technical and spare-parts documentation, including cross-references from legacy part numbers to newer catalog numbering.

For an installed D20/ system, an exact EME spare should be matched by configuration, memory option, Ethernet capability, and processor/software environment, rather than by the generic “D20 EME” description.

FAQ

What is GE D20 EME?
It is a D20/ Ethernet/Memory Expansion module based on VME technology.

What does EME mean?
EME refers to Ethernet/Memory Expansion.

What Ethernet speed does it support?
GE’s technical overview describes the D20 EME as providing connectivity to 10 MB Ethernet networks.

Does every D20 EME have the same memory capacity?
No. GE documents 0 MB, 8 MB, and 16 MB configurations, including variants without Ethernet.

What does 27-APR-13 mean?
It appears to be a unit-specific date marking. It should not be interpreted as the model or confirmed firmware version without checking the label.

Is D20 EME a CPU module?
No. It is an Ethernet/memory expansion module; D20ME or II provides the processor function in the D20/ architecture.