GE D20 EME 2400-21004 Substation Automation Communication Board

The GE D20 EME 2400-21004 Substation Automation Communication Board is an Ethernet/memory expansion module for the GE D20 and D200 substation controller (RTU) platform, adding 10BASE-T Ethernet communication to D20 series remote terminal units. It supports high-speed data exchange with SCADA master stations, intelligent electronic devices (IEDs) and other control systems, with 10BASE-T (RJ-45) interface, plus optional 10BASE-2 (BNC) and 10BASE-FL (fiber) variants and battery-backed SRAM expansion options. Built for the substation automation and distribution automation environments where D20 RTUs operate.

Key Specifications:

• Brand: GE
• Model: D20 EME
• Order Reference: 820-0474 (10BASE-T version)
• Type: Ethernet / Memory Expansion Module
• System: GE D20 / D200 substation controller (RTU)
• Ethernet Interface: 10BASE-T (RJ-45); 10BASE-2 (BNC) and 10BASE-FL (fiber) variants available
• Data Rate: 10 Mbps
• Memory Option: Battery-backed SRAM, 0 / 8 / 16 MB (per sources)
• Application: Substation automation, distribution automation, SCADA / IED communication
• Country of Origin: USA

GE D20 EME 2400-21004 Substation Automation Communication Board is the module that gives a D20 RTU a direct Ethernet window to the rest of the substation: it links the RTU to SCADA masters and IEDs over standard 10BASE-T copper (with BNC or fiber variants for longer or more isolated runs), while the optional battery-backed SRAM expands onboard data storage for events and records. As part of the D20/D200 platform, it upgrades communication bandwidth without replacing the existing RTU. A practical networking spare for installed D20 substation automation systems.