In transmission substations, the GE D20 EME transforms single-slot D20 RTUs into TCP/IP-capable nodes by plugging into the VME backplane, enabling Modbus TCP or IEC 60870-5-104 protocols over 10Base-T/FL networks while doubling event buffer capacity for high-resolution disturbance recording. Deploying the GE D20 EME with Media Interface Cards (MICs) creates daisy-chained Ethernet segments across bay-level controllers, reducing copper cabling costs while preserving compatibility with existing D20ME main boards and WESDAC I/O. The GE D20 EME hot-swappable design supports field upgrades without RTU downtime, ideal for NERC CIP-compliant substation modernization projects.

Model D20 EME (Ethernet/Memory Expansion)

Product Type VME/Eurocard expansion for D20/D200 RTUs

Ethernet 10Base-T/2/FL via MIC (RJ45/BNC/ST)

Memory Expansion 8/16 MB battery-backed SRAM

Power Supply 5 V DC from chassis backplane

Operating Temp −20°C to +60°C (−40°C to +85°C storage)

Dimensions 160 × 100 × 20 mm, 0.2 kg

Protocols Modbus TCP, PPP/TCP/IP, DNP3 over IP

Compliance CE, RoHS, NERC CIP, IEC 61850-9-2 compatible

Chassis Compatibility D20 single-slot, D200 multi-slot VME

Chassis verification

Confirm D20/D200 power supply capacity supports GE D20 EME additional load before installation.

Slot preparation

Power down RTU; insert GE D20 EME into designated VME expansion slot.

MIC connection

Install Media Interface Card (10Base-T/FL) and route internal interconnect cable within chassis.

Network wiring

Connect Ethernet cable to GE D20 EME MIC port; verify termination and shielding.

Configuration

Update RTU firmware to access GE D20 EME via WESMAINT; set IP parameters.

Route GE D20 EME interconnect cable inside chassis only to prevent EMI radiation.

Verify D20ME main board CCU firmware supports GE D20 EME VME access.

Use ESD protection when handling GE D20 EME to protect SRAM and Ethernet PHY.

Separate Ethernet from power cabling by 300 mm minimum near GE D20 EME.

Confirm chassis fan operation before powering GE D20 EME in enclosed panels.

Monthly: Monitor GE D20 EME Ethernet link LEDs and event buffer usage via WESMAINT.

Quarterly: Check GE D20 EME battery voltage; replace every 3-5 years.

Annually: Test GE D20 EME TCP/IP connectivity with SCADA master pings.

Clean GE D20 EME edge connectors during RTU maintenance intervals.

Log GE D20 EME memory overflow events for database capacity planning.

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How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.