Product Core Brief
- Part Number: 2400-21004
- Brand: GE (GE Energy / GE Digital)
- Series: GE D20 / D200 RTU
- Core Function: D20 EME (Ethernet/Memory Expansion) board that adds Ethernet communication and/or global memory expansion to GE D20/D200 remote terminal units.
- Product Type: D20/D200 Ethernet & Memory Expansion Board
- Key Specs: Ethernet expansion | global memory expansion | D20/D200 RTU compatible | VME chassis support | self-configuring board | works with MIC media interface cards
- Condition: New Original / New Surplus
Product Introduction
GE D20 EME 2400-21004 is an Ethernet/Memory Expansion (EME) board for the GE D20/D200 remote terminal unit family. The D20 EME family is used to add expanded global memory and/or Ethernet capability to D20 and D200 RTU systems, which are widely deployed in substation automation, distribution automation, and industrial RTU applications.
The D20 EME board is described in the GE D20/D200 Installation and Operations Guide as a self-configuring product: the main board has no jumpers or switches to define VME interrupts, Ethernet bus address, or similar parameters. When used for Ethernet expansion, it typically requires a Media Interface Card (MIC) such as 10BASE-T, 10BASE-FL, or 10BASE2 to provide the physical network interface.
The exact configuration of 2400-21004 — whether it is memory-only, Ethernet-only, or combined Ethernet/memory — should be confirmed from the board label, revision, and installed MIC before commissioning.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | GE (GE Energy / GE Digital) |
| Part Number | 2400-21004 |
| Product Type | D20/D200 Ethernet & Memory Expansion Board |
| Series | GE D20 / D200 RTU |
| Typical Application | Substation automation, distribution automation, industrial RTU |
| Function | Ethernet communication expansion and/or global memory expansion |
| Compatible Chassis | D20 horizontal-slot chassis, D200 vertical-slot chassis |
| Ethernet Interface | Via MIC media interface card (type to be confirmed) |
| Configuration | Self-configuring; no jumper-defined Ethernet/VME parameters |
| Status | Legacy / Obsolete |
Note: Public documentation confirms the D20 EME family and its role in D20/D200 systems, but the exact memory size, Ethernet interface type, revision, and supported MIC cards for 2400-21004 should be verified from the board label and the GE D20/D200 Installation and Operations Guide before use.
Quality Control Process (DYNAMIC GENERATION)
- Visual and connector inspection. We check the board, VME edge connector, MIC slot, Ethernet ports, LEDs, batteries, and mounting hardware for damage or corrosion.
- Continuity and insulation check. Key power paths, VME bus pins, and MIC connectors are verified for correct continuity and no short circuits.
- System compatibility check. The part number, revision, and board type are matched against the D20/D200 chassis, D20ME/D20ME II processor board, and existing MIC cards.
- Power-up and diagnostic check. Where a compatible D20/D200 test setup is available, the board is checked for proper power-up, memory recognition, and Ethernet/MIC link status.
- Final packaging. After passing inspection, the board is anti-static bagged and foam-packed for shipment.
Replacement Pitfall Guide (DYNAMIC GENERATION)
❗ Confirm whether this board is memory, Ethernet, or combined. D20 EME kits were offered in multiple variants; 2400-21004 must match the original function.
❗ Check the required MIC card. Ethernet expansion requires the correct Media Interface Card; the EME board alone may not provide the physical network port.
❗ Verify chassis compatibility. D20 EME boards are used in D20/D200 VME-compatible chassis; they are not interchangeable with PACSystems RX3i, PAC8000, or Series 90 modules.
❗ Do not confuse D20 EME with a power supply or I/O module. The EME board provides Ethernet/memory expansion, not field I/O or power conversion.
❗ Match processor board and firmware. The D20ME/D20ME II processor board, BootROM type, and Config Pro settings must support the installed EME configuration.
❗ Handle as ESD-sensitive equipment. Always use anti-static handling procedures during removal, installation, and storage.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| GE D20 EME 2400-21004 | GE D20 EME 2400-21004 | Direct | Same part number; verify revision, memory/Ethernet function, and MIC card. |
| GE D20 EME 2400-21004 | Other D20 EME variants | Needs Adaptation | Memory size, Ethernet interface, and MIC requirements may differ. |
| GE D20 EME 2400-21004 | D20ME / D20ME II processor board | Not Compatible | Processor board and EME expansion board serve different functions. |
| GE D20 EME 2400-21004 | PACSystems / PAC8000 modules | Not Compatible | Different platform, backplane, and RTU architecture. |
Benchmark highlights
- D20 EME expansion board for GE D20/D200 RTU systems.
- Adds Ethernet communication and/or global memory expansion.
- Self-configuring board with no jumper-defined Ethernet/VME parameters.
- Requires MIC media interface card for Ethernet physical layer.
- Suitable for substation automation, distribution automation, and industrial RTU maintenance.
- Legacy product; best suited for existing D20/D200 system upgrades and like-for-like replacement.
