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

Key Technical Specifications

Note: The marking “27-APR-13” is typically a manufacturing date or hardware/firmware revision identifier rather than the commercial model number. Compatibility should be verified using the complete part number and installed firmware revision.

Product Introduction & Supply Chain Strategy

The GE D20 EME 27-APR-13 is an Ethernet and Memory Expansion module developed for the GE D20 and D200 Remote Terminal Unit (RTU) platforms. It enhances substation automation systems by adding Ethernet networking capabilities and expanded global memory, enabling higher-performance SCADA communications, larger event storage, and improved multi-processor operation.

Because the D20/D200 platform remains widely deployed in electric utilities while OEM production has become limited, maintaining New Surplus inventory is an effective strategy for reducing Total Cost of Ownership (TCO). Critical substations should maintain 1–2 units of buffer stock, monitor lead time variability, and evaluate last-time-buy opportunities before genuine inventory becomes increasingly difficult to obtain.

Installation & Configuration Guide

Stage 1 – Pre-Installation (Preparation & Safety)

1. Perform Lock-Out/Tag-Out (LOTO).
2. De-energize the D20/D200 chassis.
3. Wear a grounded ESD wrist strap.
4. Back up the RTU configuration and firmware.
5. Record network settings and photograph all cable connections.

Stage 2 – Removal

1. Remove the chassis cover.
2. Disconnect the Media Interface Card (MIC) cable if installed.
3. Release the retaining hardware.
4. Carefully remove the EME board from the VME backplane.
5. Inspect the backplane connectors for contamination or bent pins.

Stage 3 – Installation

1. Verify the replacement module matches the original hardware option.
2. Install the board into the designated VME slot.
3. Connect the MIC interconnect cable correctly.
4. Confirm battery condition and daughter memory board installation if applicable.
5. Secure all mounting hardware.

Stage 4 – Power-On & Testing

1. Restore chassis power.
2. Verify successful RTU startup.
3. Confirm Ethernet link status.
4. Verify SCADA communication.
5. Test global memory operation and event logging before returning the RTU to service.

D20 EME 27-APR-13

D20 EME 27-APR-13

Firmware / Software Versions & Upgrade Notes

• Record the existing D20ME firmware version before replacing the EME module.
• Ethernet upgrades on older D20/D200 systems may require firmware reinstallation or configuration updates.
• Memory-only upgrades generally require configuration verification rather than firmware replacement.
• Confirm compatibility between the EME board, D20ME processor, chassis revision, and Media Interface Card.
• Avoid performing firmware upgrades and hardware replacement during the same maintenance outage unless fully validated.

Frequently Asked Questions (FAQ)

Q1. Is this a New Original product?

Yes. This product should be supplied as New Original / New Surplus. It is not used, repaired, or refurbished. Each module should undergo serial number verification, electrical inspection, and functional testing before shipment.

Q2. What does the D20 EME module do?

The D20 EME provides Ethernet communication capability and expands global memory for GE D20 and D200 RTU systems, improving SCADA communications, data storage, and multi-processor performance.

Q3. What does “27-APR-13” mean?

This marking generally represents a manufacturing date, firmware build date, or hardware revision code, not the official commercial model number. The exact replacement should be verified using the complete assembly or part number.

Q4. Can the module be hot-swapped?

No. GE recommends powering down the D20/ chassis before installing or removing the EME module to prevent communication failures or hardware damage.

Q5. Does the EME module require jumper configuration?

No. The D20 EME is designed as a self-configuring module and does not require manual jumper or switch settings for Ethernet addressing or memory configuration.

Q6. What warranty is appropriate for New Surplus inventory?

Qualified industrial automation suppliers typically provide a 12 month warranty, including incoming inspection, functional verification, serial number validation, and ESD-safe packaging.

Q7. What inventory strategy is recommended?

For utilities operating GE D20/ RTUs in transmission or distribution substations, maintain 1–2 New Surplus D20 EME modules as critical buffer stock. Because this platform is a mature legacy system, proactive vendor consolidation, lifecycle monitoring, and last-time-buy planning are recommended to minimize procurement risk and avoid extended outages.