{"product_id":"fanuc-from-sram-module-for-16i-18i-21i-a20b-3900-0182","title":"Fanuc FROM\/SRAM module for 16i\/ 18i\/ 21i A20B-3900-0182","description":"\u003cp data-start=\"79\" data-end=\"361\"\u003eThe \u003cstrong data-start=\"83\" data-end=\"107\"\u003eFANUC A20B-3900-0182\u003c\/strong\u003e is a \u003cstrong data-start=\"113\" data-end=\"130\"\u003ememory module\u003c\/strong\u003e used in industrial \u003cstrong data-start=\"150\" data-end=\"182\"\u003eFANUC CNC controller systems\u003c\/strong\u003e. It combines \u003cstrong data-start=\"196\" data-end=\"216\"\u003eFlash ROM (FROM)\u003c\/strong\u003e for firmware\/program storage and \u003cstrong data-start=\"250\" data-end=\"258\"\u003eSRAM\u003c\/strong\u003e for parameter\/runtime data needed by the controller electronics. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"363\" data-end=\"380\"\u003e📌 What It Is\u003c\/h3\u003e\n\u003cul data-start=\"381\" data-end=\"758\"\u003e\n\u003cli data-start=\"381\" data-end=\"416\"\u003e\n\u003cp data-start=\"383\" data-end=\"416\"\u003e\u003cstrong data-start=\"383\" data-end=\"399\"\u003ePart Number:\u003c\/strong\u003e A20B-3900-0182\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"417\" data-end=\"484\"\u003e\n\u003cp data-start=\"419\" data-end=\"484\"\u003e\u003cstrong data-start=\"419\" data-end=\"428\"\u003eType:\u003c\/strong\u003e \u003cstrong data-start=\"429\" data-end=\"458\"\u003eFROM + SRAM memory module\u003c\/strong\u003e (printed circuit board)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"485\" data-end=\"758\"\u003e\n\u003cp data-start=\"487\" data-end=\"514\"\u003e\u003cstrong data-start=\"487\" data-end=\"512\"\u003eMemory Configuration:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"517\" data-end=\"758\"\u003e\n\u003cli data-start=\"517\" data-end=\"611\"\u003e\n\u003cp data-start=\"519\" data-end=\"611\"\u003e\u003cstrong data-start=\"519\" data-end=\"545\"\u003e32 MB Flash ROM (FROM)\u003c\/strong\u003e — holds the CNC controller’s core firmware and system programs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"614\" data-end=\"758\"\u003e\n\u003cp data-start=\"616\" data-end=\"758\"\u003e\u003cstrong data-start=\"616\" data-end=\"631\"\u003e256 KB SRAM\u003c\/strong\u003e — battery-backed memory used for storing runtime data, machine parameters, and settings. \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=\"760\" data-end=\"800\"\u003e🧠 Function in FANUC CNC Controllers\u003c\/h3\u003e\n\u003cp data-start=\"801\" data-end=\"933\"\u003eThis module sits inside the controller’s electronics alongside CPU boards and other control modules. Its role is critical because:\u003c\/p\u003e\n\u003cul data-start=\"934\" data-end=\"1229\"\u003e\n\u003cli data-start=\"934\" data-end=\"1027\"\u003e\n\u003cp data-start=\"936\" data-end=\"1027\"\u003e\u003cstrong data-start=\"936\" data-end=\"985\"\u003eFROM stores the firmware and control software\u003c\/strong\u003e that the CNC needs to boot and operate.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1028\" data-end=\"1229\"\u003e\n\u003cp data-start=\"1030\" data-end=\"1229\"\u003e\u003cstrong data-start=\"1030\" data-end=\"1100\"\u003eSRAM retains configuration data, parameters, and runtime variables\u003c\/strong\u003e, often backed by a battery so this information isn’t lost when the machine is powered off. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1231\" data-end=\"1394\"\u003eIf this memory module fails or is missing, the CNC controller may \u003cstrong data-start=\"1297\" data-end=\"1319\"\u003efail to initialize\u003c\/strong\u003e, lose saved machine parameters, or throw memory-related alarms at startup.\u003c\/p\u003e\n\u003ch3 data-start=\"1396\" data-end=\"1423\"\u003e⚙️ Installation \u0026amp; Notes\u003c\/h3\u003e\n\u003cul data-start=\"1424\" data-end=\"1861\"\u003e\n\u003cli data-start=\"1424\" data-end=\"1659\"\u003e\n\u003cp data-start=\"1426\" data-end=\"1659\"\u003eWhen replacing the A20B-3900-0182 module, \u003cstrong data-start=\"1468\" data-end=\"1552\"\u003eall FROM files, parameters, and programs must generally be reloaded from backups\u003c\/strong\u003e after installation to restore the controller to correct operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1660\" data-end=\"1861\"\u003e\n\u003cp data-start=\"1662\" data-end=\"1861\"\u003eIt’s part of the broader \u003cstrong data-start=\"1687\" data-end=\"1707\"\u003eA20B-3900 series\u003c\/strong\u003e of FANUC memory modules, which come in various combinations of FROM and SRAM sizes for different controller models.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JJAutomation","offers":[{"title":"New","offer_id":44838576652424,"sku":"A20B-3900-0182","price":0.0,"currency_code":"INR","in_stock":true},{"title":"Used \/ Refurbished","offer_id":46109847322760,"sku":"A20B-3900-0182","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-2026-02-25T125309.739.jpg?v=1772004198","url":"https:\/\/jjautomation.in\/products\/fanuc-from-sram-module-for-16i-18i-21i-a20b-3900-0182","provider":"JJAutomation","version":"1.0","type":"link"}