{"product_id":"ge-wesdac-d20me-vme-main-processing-module","title":"GE WESDAC D20ME VME Main Processing Module","description":"\u003cp\u003eThe \u003cstrong\u003eGE WESDAC D20ME\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eD20ME\u003c\/strong\u003e Processing Module, operates as a central processing unit for data concentration, high-speed protocol translation, and real-time automation logic execution within VMEbus-based industrial and power 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\u003eD20ME\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGE (General Electric \/ Wescom)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eWESDAC \/ D20 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUnited States (US)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eStandard VME slot-enclosure allocation metrics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e19\" rack-mount chassis configuration \/ Single-slot VME profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to +55 deg C (+32 to +131 deg F) functional window\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +70 deg C (-40 to +158 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e5% to 95% relative humidity, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration Resistance\u003c\/td\u003e\n\u003ctd\u003e5 to 2,000 Hz at peak acceleration of 5 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShock Threshold\u003c\/td\u003e\n\u003ctd\u003e10 g, half-sine wave, over an 11 ms duration interval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirements\u003c\/td\u003e\n\u003ctd\u003eInput options: 20-60 VDC, 100-300 VDC, or 85-264 VAC source rails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e2 MB flash application memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSRAM\u003c\/td\u003e\n\u003ctd\u003e1.5 MB static random-access memory (volatile)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNVRAM\u003c\/td\u003e\n\u003ctd\u003e512 KB non-volatile random-access memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBootROM\u003c\/td\u003e\n\u003ctd\u003e1 MB integrated boot read-only memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Interfaces\u003c\/td\u003e\n\u003ctd\u003e7 RS-232\/485 serial ports \/ 1 RS-232 maintenance port (dedicated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Bus Interface\u003c\/td\u003e\n\u003ctd\u003e2 D.20 Link HDLC ports for localized peripheral expansion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eGE Industrial Control and Backplane Execution\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Bus Communication Velocity Licences:\u003c\/strong\u003e The main processing module synchronizes peripheral tracking loops over parallel VMEbus lines and dual High-Level Data Link Control (HDLC) D.20 Link ports. It acts as a real-time data concentrator, capturing field telemetry inputs from downstream boards and updating the central system database within deterministic sub-millisecond execution cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfinet \/ EtherNet\/IP Deterministic Networks:\u003c\/strong\u003e Outfitted with an integrated network configuration layer, the D20ME supports the PROFIBUS DP protocol to accelerate high-speed fieldbus productivity. The 32-bit computing architecture translates raw asynchronous serial data streams from its 7 onboard ports into structured, deterministic network packets equipped with advanced system diagnostic hooks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What self-diagnostic steps does the D20ME perform to safeguard program integrity?\u003c\/p\u003e\n\u003cp\u003eA: The module runs continuous automated background checks, including memory checksum verifications across the 2 MB flash application space, runtime read\/write validation tests inside the 1.5 MB SRAM, and strict user configuration file audits. If a memory cell corruption or parity exception manifests, the module flags a diagnostic fault to prevent corrupt logic from executing.\u003c\/p\u003e\n\u003cp\u003eQ: Can peripheral I\/O lines connected to the D.20 Link ports be modified while the D20ME is actively processing substation logic?\u003c\/p\u003e\n\u003cp\u003eA: No. Modifying physical interface lines while the HDLC ports are actively scanning will disrupt serial synchronization loops, cause immediate communication timeouts, and inject bad data attributes into the active database. Always place dependent logic blocks into test mode or isolate the module's power supply before altering signal wiring.\u003c\/p\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":47894165815486,"sku":"WESDAC D20ME","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-06-29_16-04-03_0535fd8b-0e17-46a1-b120-4005932437b6.png?v=1782722872","url":"https:\/\/www.autooiltech.com\/ar\/products\/ge-wesdac-d20me-vme-main-processing-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}