{"product_id":"fanuc-from-sram-module-for-16i-18i-21i-a20b-3900-0165","title":"Fanuc FROM\/SRAM module for 16i\/ 18i\/ 21i A20B-3900-0165","description":"\u003cp data-start=\"268\" data-end=\"624\"\u003eThe \u003cstrong data-start=\"291\" data-end=\"309\"\u003eA20B-3900-0165\u003c\/strong\u003e is a \u003cstrong data-start=\"315\" data-end=\"332\"\u003ememory module\u003c\/strong\u003e used inside FANUC CNC controller systems. It combines non-volatile \u003cstrong data-start=\"400\" data-end=\"420\"\u003eFlash ROM (FROM)\u003c\/strong\u003e and \u003cstrong data-start=\"425\" data-end=\"461\"\u003ebattery-backed Static RAM (SRAM)\u003c\/strong\u003e on a small circuit card that plugs into the controller’s main electronics board to store essential firmware and system data. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"626\" data-end=\"652\"\u003e\u003cstrong data-start=\"626\" data-end=\"650\"\u003eKey Characteristics:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"653\" data-end=\"1701\"\u003e\n\u003cli data-start=\"653\" data-end=\"775\"\u003e\n\u003cp data-start=\"655\" data-end=\"775\"\u003e💾 \u003cstrong data-start=\"658\" data-end=\"674\"\u003eMemory Type:\u003c\/strong\u003e FROM + SRAM module — \u003cstrong data-start=\"696\" data-end=\"715\"\u003e32 MB Flash ROM\u003c\/strong\u003e plus \u003cstrong data-start=\"721\" data-end=\"734\"\u003e3 MB SRAM\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"776\" data-end=\"1119\"\u003e\n\u003cp data-start=\"778\" data-end=\"796\"\u003e🧠 \u003cstrong data-start=\"781\" data-end=\"794\"\u003eFunction:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"799\" data-end=\"1119\"\u003e\n\u003cli data-start=\"799\" data-end=\"920\"\u003e\n\u003cp data-start=\"801\" data-end=\"920\"\u003eThe \u003cstrong data-start=\"805\" data-end=\"813\"\u003eFROM\u003c\/strong\u003e portion holds the controller’s core firmware and system programs that the CNC needs to boot and operate.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"923\" data-end=\"1119\"\u003e\n\u003cp data-start=\"925\" data-end=\"1119\"\u003eThe \u003cstrong data-start=\"929\" data-end=\"937\"\u003eSRAM\u003c\/strong\u003e portion holds runtime data and machine parameters, often backed by battery power so settings aren’t lost when the controller is powered down. \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\u003cli data-start=\"1120\" data-end=\"1270\"\u003e\n\u003cp data-start=\"1122\" data-end=\"1270\"\u003e🔌 \u003cstrong data-start=\"1125\" data-end=\"1142\"\u003eInstallation:\u003c\/strong\u003e Plugs into a designated memory socket on the controller’s main PCB or memory backplane. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1271\" data-end=\"1492\"\u003e\n\u003cp data-start=\"1273\" data-end=\"1492\"\u003e🛠️ \u003cstrong data-start=\"1277\" data-end=\"1285\"\u003eUse:\u003c\/strong\u003e Commonly found in FANUC \u003cstrong data-start=\"1310\" data-end=\"1338\"\u003ei-Series “B” controllers\u003c\/strong\u003e such as \u003cem data-start=\"1347\" data-end=\"1372\"\u003e16i-B, 18i-B, and 21i-B\u003c\/em\u003e, where FROM\/SRAM modules are required as part of the system’s core electronics. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1493\" data-end=\"1701\"\u003e\n\u003cp data-start=\"1495\" data-end=\"1701\"\u003e📦 \u003cstrong data-start=\"1498\" data-end=\"1509\"\u003eStatus:\u003c\/strong\u003e This part is typically \u003cstrong data-start=\"1533\" data-end=\"1558\"\u003ediscontinued by FANUC\u003c\/strong\u003e but remains widely available through aftermarket suppliers as new surplus, refurbished, or tested units. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1703\" data-end=\"1727\"\u003e🧩 Practical Notes\u003c\/h3\u003e\n\u003cul data-start=\"1728\" data-end=\"2167\"\u003e\n\u003cli data-start=\"1728\" data-end=\"1957\"\u003e\n\u003cp data-start=\"1730\" data-end=\"1957\"\u003eWithout a working memory module like this, a FANUC controller may \u003cstrong data-start=\"1796\" data-end=\"1818\"\u003efail to initialize\u003c\/strong\u003e, lose saved parameters, or be unable to run properly because it lacks essential firmware and data. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1958\" data-end=\"2167\"\u003e\n\u003cp data-start=\"1960\" data-end=\"2167\"\u003eWhen replacing this module, it’s important to \u003cstrong data-start=\"2006\" data-end=\"2048\"\u003erestore machine parameters and backups\u003c\/strong\u003e after installation so the controller retains correct configuration and programs. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JJAutomation","offers":[{"title":"New","offer_id":44837680152712,"sku":"A20B-3900-0165","price":0.0,"currency_code":"INR","in_stock":true},{"title":"Used \/ Refurbished","offer_id":46109847257224,"sku":"A20B-3900-0165","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-2026-02-25T115838.602.jpg?v=1772000926","url":"https:\/\/jjautomation.in\/products\/fanuc-from-sram-module-for-16i-18i-21i-a20b-3900-0165","provider":"JJAutomation","version":"1.0","type":"link"}