GE D20 EME Ethernet & Memory Expansion Board

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

The GE D20 EME (Ethernet & Memory Expansion) board is an expansion module built for the GE WESDAC D20 and D200 substation controller platforms. In power transmission and distribution substations, the D20 main chassis acts as a data concentrator, protocol converter, and SCADA gateway. Installing the D20 EME module upgrades the controller’s processing capabilities by expanding Global system memory and adding native Ethernet networking options (including fiber-optic 10BASE-FL for high-noise electrical environments).

As utilities continue to rely on long-life legacy D20/D200 RTU architectures while modernizing network backbones, sourcing verified New Surplus D20 EME boards is essential. Choosing factory-sealed New Surplus over worn second-hand components protects against common aging risks, such as degraded memory retention, failed Ethernet PHY transceivers, and backplane pin oxidation. Maintaining ready-to-deploy buffer stock on-site ensures immediate restoration of critical substation SCADA telemetry without risking unmonitored power grid outages.

D20 EME

D20 EME

Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

1. Lock-Out/Tag-Out (LOTO): Isolate and disconnect control power to the D20 / D200 main chassis before handling or swapping internal boards.
2. Media Card Verification: Confirm the correct Media Interface Card (MIC) for your media physical layer (10BASE-T copper, 10BASE-FL fiber, or 10BASE2 coax) is properly installed on the D20 EME daughterboard.
3. ESD Protection: Wear a grounded anti-static wrist strap when inserting the board to prevent static damage to memory logic.

Stage 2: Removal

1. Unplug external Ethernet communications cabling (RJ45, ST fiber, or BNC) from the module interface.
2. Loosen the top and bottom retaining thumbscrews on the existing D20 EME card front plate.
3. Slide the board straight out of the chassis guide slots using the card ejector handles.

Stage 3: Installation (Clone & Seat)

1. Set any required hardware jumper configuration switches on the replacement D20 EME board to match the original unit.
2. Align the board edges with the chassis guide rails and slide the module smoothly into the backplane connectors until firmly seated.
3. Tighten the retaining screws and reconnect the network communication lines.

Stage 4: Power-On & Testing

1. Re-apply power to the D20 main chassis and observe the diagnostic startup cycle.
2. Verify system LEDs indicate normal board initialization and active Ethernet link integrity.
3. Access the controller via GE WESDAC / ConfigPro software to confirm expanded memory recognition and verify active SCADA IP communications (DNP3 over IP or IEC 60870-5-104).

Firmware/Software Versions & Upgrade Notes

• Configuration Utility: Configured and managed using GE’s ConfigPro or SG32 software suites for D20/D200 RTU systems.
• Protocol Stack: Enables high-speed LAN/WAN telemetry protocols, including DNP3 TCP/UDP, Modbus TCP, and IEC 60870-5-104.
• System Redundancy: Compatible with dual-CPU D20/ main chassis setups for automated main/standby hot-failover switching.

Frequently Asked Questions (FAQ)

Is this D20 EME unit guaranteed to be New Surplus and not refurbished?

Yes. This module is 100% Brand New Surplus stock in original OEM factory protective packaging. It has never been racked into a live substation chassis, subjected to field power surges, or repaired.

What is the primary purpose of adding a D20 EME board to a D20 RTU?

The D20 EME board serves two key purposes: it expands the internal memory capacity (allowing the RTU to process larger data tables and protocol configurations) and adds dedicated Ethernet interface connections for modern IP-based SCADA integration.

Which Ethernet media types are supported by the D20 EME board?

Depending on the attached Media Interface Card (MIC), the D20 EME supports 10BASE-T (twisted pair RJ45), 10BASE-FL (fiber optic for high EMI immunity), or 10BASE2 (coaxial).

Do I need to re-program the whole D20 controller when replacing a D20 EME board?

If you are performing a 1-to-1 hardware replacement with identical jumper settings and MIC options, the main CPU will re-initialize communication over the EME board upon bootup. However, backing up the chassis system configuration via ConfigPro prior to maintenance is always recommended.

What warranty protection comes with this New Surplus module?

We support this GE D20 EME New Surplus expansion board with a comprehensive 1-year replacement warranty. Every board undergoes strict physical checks, connector inspection, and anti-static packaging before shipping.