{"product_id":"fanuc-from-sram-module-for-16i-18i-21i-a20b-3900-0183","title":"Fanuc FROM\/SRAM module for 16i\/ 18i\/ 21i A20B-3900-0183","description":"\u003cp data-start=\"76\" data-end=\"409\"\u003eThe \u003cstrong data-start=\"80\" data-end=\"104\"\u003eFANUC A20B-3900-0183\u003c\/strong\u003e is a \u003cstrong data-start=\"110\" data-end=\"132\"\u003ememory card\/module\u003c\/strong\u003e used inside industrial \u003cstrong data-start=\"156\" data-end=\"188\"\u003eFANUC CNC controller systems\u003c\/strong\u003e. It combines \u003cstrong data-start=\"202\" data-end=\"222\"\u003eFlash ROM (FROM)\u003c\/strong\u003e and \u003cstrong data-start=\"227\" data-end=\"248\"\u003eStatic RAM (SRAM)\u003c\/strong\u003e on a single board — providing both permanent storage for firmware and a reservoir for runtime data and machine parameters. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"411\" data-end=\"428\"\u003e📌 What It Is\u003c\/h3\u003e\n\u003cul data-start=\"429\" data-end=\"762\"\u003e\n\u003cli data-start=\"429\" data-end=\"464\"\u003e\n\u003cp data-start=\"431\" data-end=\"464\"\u003e\u003cstrong data-start=\"431\" data-end=\"447\"\u003ePart Number:\u003c\/strong\u003e A20B-3900-0183\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"465\" data-end=\"532\"\u003e\n\u003cp data-start=\"467\" data-end=\"532\"\u003e\u003cstrong data-start=\"467\" data-end=\"476\"\u003eType:\u003c\/strong\u003e \u003cstrong data-start=\"477\" data-end=\"506\"\u003eFROM + SRAM memory module\u003c\/strong\u003e (printed circuit board)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"533\" data-end=\"762\"\u003e\n\u003cp data-start=\"535\" data-end=\"562\"\u003e\u003cstrong data-start=\"535\" data-end=\"560\"\u003eMemory Configuration:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"565\" data-end=\"762\"\u003e\n\u003cli data-start=\"565\" data-end=\"643\"\u003e\n\u003cp data-start=\"567\" data-end=\"643\"\u003e\u003cstrong data-start=\"567\" data-end=\"593\"\u003e32 MB Flash ROM (FROM)\u003c\/strong\u003e — stores essential firmware and system programs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"646\" data-end=\"762\"\u003e\n\u003cp data-start=\"648\" data-end=\"762\"\u003e\u003cstrong data-start=\"648\" data-end=\"663\"\u003e512 KB SRAM\u003c\/strong\u003e — battery-backed memory for parameters and runtime variables \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"764\" data-end=\"805\"\u003e🧠 Function in a FANUC CNC Controller\u003c\/h3\u003e\n\u003cp data-start=\"806\" data-end=\"943\"\u003eThis module sits inside the controller electronics alongside CPU cards, servo\/axis modules, and other memory boards. Its roles include:\u003c\/p\u003e\n\u003cul data-start=\"944\" data-end=\"1486\"\u003e\n\u003cli data-start=\"944\" data-end=\"1064\"\u003e\n\u003cp data-start=\"946\" data-end=\"1064\"\u003e💾 \u003cstrong data-start=\"949\" data-end=\"970\"\u003eFirmware Storage:\u003c\/strong\u003e Holding the CNC’s operating software and control routines that the system loads at startup.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1065\" data-end=\"1289\"\u003e\n\u003cp data-start=\"1067\" data-end=\"1289\"\u003e⚡ \u003cstrong data-start=\"1069\" data-end=\"1090\"\u003eParameter Memory:\u003c\/strong\u003e Storing machine settings, configuration parameters, and other runtime information that must be retained even when the controller is powered off — supported by a backup battery on the SRAM portion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1290\" data-end=\"1486\"\u003e\n\u003cp data-start=\"1292\" data-end=\"1486\"\u003e⚠️ \u003cstrong data-start=\"1295\" data-end=\"1327\"\u003eController Boot \u0026amp; Operation:\u003c\/strong\u003e Without a functioning memory module like this, a FANUC CNC controller may fail to boot or throw memory\/parameter errors. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1488\" data-end=\"1516\"\u003e📋 Typical Compatibility\u003c\/h3\u003e\n\u003cp data-start=\"1517\" data-end=\"1704\"\u003eMemory modules from the \u003cstrong data-start=\"1541\" data-end=\"1561\"\u003eA20B-3900 series\u003c\/strong\u003e are used in a variety of FANUC controller families that employ modular memory cards, including older “B” and Series 20 CNC controls such as:\u003c\/p\u003e\n\u003cul data-start=\"1705\" data-end=\"1881\"\u003e\n\u003cli data-start=\"1705\" data-end=\"1724\"\u003e\n\u003cp data-start=\"1707\" data-end=\"1724\"\u003e\u003cstrong data-start=\"1707\" data-end=\"1722\"\u003eFANUC 16i-B\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1725\" data-end=\"1744\"\u003e\n\u003cp data-start=\"1727\" data-end=\"1744\"\u003e\u003cstrong data-start=\"1727\" data-end=\"1742\"\u003eFANUC 18i-B\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1745\" data-end=\"1881\"\u003e\n\u003cp data-start=\"1747\" data-end=\"1881\"\u003e\u003cstrong data-start=\"1747\" data-end=\"1762\"\u003eFANUC 21i-B\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JJAutomation","offers":[{"title":"New","offer_id":44838609223816,"sku":"A20B-3900-0183","price":0.0,"currency_code":"INR","in_stock":true},{"title":"Used \/ Refurbished","offer_id":46109847355528,"sku":"A20B-3900-0183","price":0.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/1903\/3224\/files\/WhatsAppImage2025-10-18at1.47.49PM-2026-02-25T125445.528.jpg?v=1772004294","url":"https:\/\/jjautomation.in\/products\/fanuc-from-sram-module-for-16i-18i-21i-a20b-3900-0183","provider":"JJAutomation","version":"1.0","type":"link"}