{"product_id":"fanuc-a20b-3900-0074-4m-from-memory-module","title":"FANUC A20B-3900-0074 4M FROM Memory Module","description":"\u003cp style=\"margin: 0 0 14px;\"\u003eThe \u003cstrong\u003eFANUC A20B-3900-0074\u003c\/strong\u003e is a \u003cstrong\u003e4M FROM system memory module\u003c\/strong\u003e for compatible FANUC i-Series CNC controls. Installed in a dedicated DIMM socket on the CNC motherboard, it provides non-volatile storage for CNC and servo system software.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 14px;\"\u003eSome parts listings describe it as a 4MB program memory card or Program Memory C. FANUC maintenance documentation identifies its formal hardware type as a FROM module, which is different from the adjacent SRAM module used for system data.\u003c\/p\u003e\n\u003ch4 style=\"margin: 32px 0 14px;\"\u003eA20B-3900-0074 Product Information\u003c\/h4\u003e\n\u003ctable cellpadding=\"10\" style=\"width: 100%; border-collapse: collapse; margin: 0 0 18px;\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"width: 34%;\"\u003e\n\u003ccol\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f7f7f7;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFANUC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel \/ MPN\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA20B-3900-0074\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f7f7f7;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eOfficial Module Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFROM module \/ plug-in memory module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDocumented Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4M, commonly listed as 4MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f7f7f7;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNon-volatile storage for CNC system and servo system software\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDocumented CNC Family\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFANUC Series 16i, 18i, 21i and 20i Model A configurations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f7f7f7;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDedicated DIMM module socket on the CNC motherboard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelated 4M Specification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA20B-3900-0014; verify compatibility before substitution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f7f7f7;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew, refurbished, or used 90% new; subject to stock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTesting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100% tested before shipping; test video available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f7f7f7;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eHandling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNormally 1–2 business days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShipping \/ ETA\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDHL, UPS, or FedEx worldwide; typically 3–7 business days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f7f7f7;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 year for new\/refurbished; 3 months for used 90% new\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eService \/ Packing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFree technical support; anti-static reinforced packing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4 style=\"margin: 32px 0 14px;\"\u003eFROM Module Function\u003c\/h4\u003e\n\u003cp style=\"margin: 0 0 14px;\"\u003eA20B-3900-0074 stores the installed CNC and servo system files required by the matching control configuration. It should not be confused with an SRAM module, DRAM module or removable operator program card. A correctly sized module without the correct system software may not start or operate the machine correctly.\u003c\/p\u003e\n\u003ch4 style=\"margin: 32px 0 14px;\"\u003eCompatibility and Software Checks\u003c\/h4\u003e\n\u003cp style=\"margin: 0 0 14px;\"\u003eConfirm the complete \u003cstrong\u003eA20B-3900-0074\u003c\/strong\u003e number, module revision, motherboard, CNC series and installed software version. FANUC also documents A20B-3900-0014 in the 4M FROM category, but matching capacity alone does not prove direct interchangeability. Confirm the machine builder's software package and option configuration before replacement.\u003c\/p\u003e\n\u003ch4 style=\"margin: 32px 0 14px;\"\u003eTesting and Installation Notes\u003c\/h4\u003e\n\u003cp style=\"margin: 0 0 14px;\"\u003eREACO CNC checks the label, contacts, PCB condition, module recognition and system startup under an applicable test setup. Back up all accessible CNC parameters, programs, offsets, PMC data and machine-builder files before replacement. Installation should be performed with CNC power isolated and proper ESD protection.\u003c\/p\u003e\n\u003cp style=\"margin: 0;\"\u003eRelated resources: \u003ca href=\"\/es\/collections\/fanuc-pcbs\"\u003eFANUC PCB boards\u003c\/a\u003e, \u003ca href=\"\/es\/collections\/fanuc-controls\"\u003eFANUC CNC controls\u003c\/a\u003e and \u003ca href=\"\/es\/products\/fanuc-mitsubishi-cnc-robot-parts-repair\"\u003eFANUC CNC repair services\u003c\/a\u003e.\u003c\/p\u003e","brand":"FANUC","offers":[{"title":"New","offer_id":67919402729687,"sku":"A20B-3900-0074-new","price":248.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/3784\/4183\/files\/fanuc-a20b-3900-0074-from-memory-main.webp?v=1793265909","url":"https:\/\/reacocnc.com\/es\/products\/fanuc-a20b-3900-0074-4m-from-memory-module","provider":"REACO CNC","version":"1.0","type":"link"}