{"product_id":"fanuc-option-pcb-for-16i-18i-21i-a20b-8100-0381","title":"Fanuc Option PCB for 16i\/ 18i\/ 21i A20B-8100-0381","description":"\u003cp data-start=\"58\" data-end=\"381\"\u003eThe \u003cstrong data-start=\"62\" data-end=\"80\"\u003eA20B‑8100‑0381\u003c\/strong\u003e is a \u003cstrong data-start=\"86\" data-end=\"147\"\u003ecommunication\/logic interface printed circuit board (PCB)\u003c\/strong\u003e used in industrial \u003cstrong data-start=\"167\" data-end=\"199\"\u003eFANUC CNC controller systems\u003c\/strong\u003e — and specifically it’s part of the \u003cstrong data-start=\"236\" data-end=\"256\"\u003eA20B‑8100 series\u003c\/strong\u003e of controller PCBs that handle I\/O link and data communications inside the controller. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"383\" data-end=\"412\"\u003e🔌 What This Board Does\u003c\/h3\u003e\n\u003cul data-start=\"413\" data-end=\"1360\"\u003e\n\u003cli data-start=\"413\" data-end=\"648\"\u003e\n\u003cp data-start=\"415\" data-end=\"648\"\u003e\u003cstrong data-start=\"415\" data-end=\"444\"\u003eI\/O LINK‑II Save B Board:\u003c\/strong\u003e It’s designated as an \u003cstrong data-start=\"467\" data-end=\"493\"\u003eI\/O Link‑II Save B PCB\u003c\/strong\u003e, meaning it’s used in conjunction with FANUC’s \u003cstrong data-start=\"541\" data-end=\"563\"\u003eI\/O LINK‑II system\u003c\/strong\u003e (a distributed I\/O communications protocol). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"649\" data-end=\"1146\"\u003e\n\u003cp data-start=\"651\" data-end=\"967\"\u003e\u003cstrong data-start=\"651\" data-end=\"660\"\u003eRole:\u003c\/strong\u003e Works as part of the I\/O communications infrastructure, typically in \u003cstrong data-start=\"730\" data-end=\"773\"\u003eI\/O Link‑II master\/slave configurations\u003c\/strong\u003e — for example in modular CNC controls that use an I\/O Link‑II bus to communicate between the controller and auxiliary I\/O or junction interface hardware. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-start=\"970\" data-end=\"1146\"\u003e\n\u003cli data-start=\"970\" data-end=\"1146\"\u003e\n\u003cp data-start=\"972\" data-end=\"1146\"\u003eIn this system, “Save B” indicates the board’s position or role (often referenced with other I\/O Link‑II cards like \u003cem data-start=\"1088\" data-end=\"1104\"\u003eA20B‑8100‑0380\u003c\/em\u003e). \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=\"1147\" data-end=\"1360\"\u003e\n\u003cp data-start=\"1149\" data-end=\"1360\"\u003e\u003cstrong data-start=\"1149\" data-end=\"1164\"\u003eConnection:\u003c\/strong\u003e It plugs into the controller’s electronics rack\/backplane and interfaces with other PCBs, carrying I\/O signals and link data within the control architecture. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1362\" data-end=\"1389\"\u003e🛠️ Practical Context\u003c\/h3\u003e\n\u003cul data-start=\"1390\" data-end=\"1990\"\u003e\n\u003cli data-start=\"1390\" data-end=\"1615\"\u003e\n\u003cp data-start=\"1392\" data-end=\"1615\"\u003eThis board doesn’t perform core CNC processing (that’s done by CPU boards), nor motion control (servo\/axis boards), but \u003cstrong data-start=\"1512\" data-end=\"1551\"\u003eenables advanced I\/O communications\u003c\/strong\u003e for integrated systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1616\" data-end=\"1825\"\u003e\n\u003cp data-start=\"1618\" data-end=\"1825\"\u003eIf it fails, the controller might show errors related to \u003cstrong data-start=\"1675\" data-end=\"1736\"\u003eI\/O link communication or distributed input\/output issues\u003c\/strong\u003e, especially where I\/O Link‑II networks are used. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1826\" data-end=\"1990\"\u003e\n\u003cp data-start=\"1828\" data-end=\"1990\"\u003e\u003cstrong data-start=\"1828\" data-end=\"1861\"\u003eCore exchange may be required\u003c\/strong\u003e when purchasing replacements and available repair\/refurbishment services vary by supplier. \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":44838947750024,"sku":"A20B-8100-0381","price":0.0,"currency_code":"INR","in_stock":true},{"title":"Used \/ Refurbished","offer_id":46109847748744,"sku":"A20B-8100-0381","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-2026-02-25T145058.178.jpg?v=1772011265","url":"https:\/\/jjautomation.in\/products\/fanuc-option-pcb-for-16i-18i-21i-a20b-8100-0381","provider":"JJAutomation","version":"1.0","type":"link"}