{"product_id":"ge-d20-eme-ethernet-and-memory-expansion-module","title":"GE D20 EME Ethernet and Memory Expansion Module","description":"\u003cp\u003eThe \u003cstrong\u003eGE D20 EME\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eD20 EME\u003c\/strong\u003e Ethernet and Memory Expansion Module, operates as a dedicated hardware component for localized processing scaling and network medium conversion within D20 substation automation platforms.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eD20 EME\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGE (General Electric)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eStandard Rack Component Weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e19.0\" wide x 5.25\" high x 8.1\" deep\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 - 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eBase Power Input Dependent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply Options\u003c\/td\u003e\n\u003ctd\u003e20-60 VDC \/ 100-300 VDC \/ 85-264 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMedia Types Supported\u003c\/td\u003e\n\u003ctd\u003e10Base-T, 10Base-2, 10Base-FL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Options\u003c\/td\u003e\n\u003ctd\u003e0 MB, 8 MB, or 16 MB battery-backed SRAM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Ports\u003c\/td\u003e\n\u003ctd\u003e7 RS-232\/485 serial, 1 RS-232 maintenance, 2 D.20 Link HDLC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards Compliance\u003c\/td\u003e\n\u003ctd\u003eEN 61000-6-2 (Immunity), EN 61000-6-4 (Emissions)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eD20 EME\u003c\/strong\u003e: Base module architecture denoting Ethernet and Memory Expansion capability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Matrix Configurations\u003c\/strong\u003e: Discrete factory assembly profiles specify onboard battery-backed volatile memory retention capacities, coded explicitly as 0 MB, 8 MB, or 16 MB SRAM layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply Matrix Codes\u003c\/strong\u003e: Base designations correlate to internal power board installation profiles, differentiating low-voltage direct current (20-60 VDC) from universal high-voltage ranges (100-300 VDC \/ 85-264 VAC).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFirmware Flash Compatibility and Serial-to-Ethernet Processing\u003c\/h3\u003e\n\u003cp\u003eThe processing architecture handles data packet routing between legacy HDLC peripheral networks and external substation links. Serial-to-Ethernet translation rates match localized timing blocks to prevent data truncation over asynchronous connections. To ensure the integrity of diagnostic logging and prevent memory parity failures within the volatile SRAM banks, node integration relies entirely on verifying exact firmware flash compatibility rules across the active D20 master controller baseplate.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the D20 EME module support live backplane insertion or hot-swap remediation?\u003c\/p\u003e\n\u003cp\u003eA: No. The internal logic connections and shared address lines of the high-speed processing bus lack active electrical isolation boundaries. The chassis power bus must be locked out before seating the unit to prevent hardware latch-up.\u003c\/p\u003e\n\u003cp\u003eQ: How is memory mapping managed if the battery-backed SRAM configuration is upgraded?\u003c\/p\u003e\n\u003cp\u003eA: Changing the memory configuration requires setting physical jumpers on the circuit board and applying a matching firmware flash compatibility script. This procedure ensures that the D20 operating system recognizes the expanded memory address spaces during boot initialization.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Rack Alignment:\u003c\/strong\u003e Slide the 19\" module smoothly into the designated sub-rack guide rails, tightening all four front-panel thumbscrews to the frame to ensure uniform grounding continuity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiber Optic Optical Connection:\u003c\/strong\u003e Clean all 10Base-FL ST connectors prior to insertion, verifying that fiber bend radii remain above 30 mm to prevent structural signal degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial Comm Line Shielding:\u003c\/strong\u003e Ground all external RS-485 network drain wires at the chassis entry point only, suppressing local common-mode noise across the seven active communication ports.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":53114686013749,"sku":"D20 EME","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/D20EME1.png?v=1783675074","url":"https:\/\/www.5gplc.com\/products\/ge-d20-eme-ethernet-and-memory-expansion-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}