{"product_id":"fanuc-power-supply-unit-for-16i-18i-21i-a20b-8100-0720-copy","title":"Fanuc PCB Backup Unit for 16i\/ 18i\/ 21i A20B-2100-0820","description":"\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-69a540f7-3498-8323-9c7b-e146c3e09ccd-5\" data-testid=\"conversation-turn-26\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"0097729a-71fd-416b-905b-33e39389dcaf\" dir=\"auto\" data-message-model-slug=\"gpt-5-3\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003cp data-start=\"0\" data-end=\"162\"\u003e\u003cstrong data-start=\"0\" data-end=\"18\"\u003eA20B-2100-0820\u003c\/strong\u003e is a \u003cstrong data-start=\"24\" data-end=\"87\"\u003ePrinted Circuit Board (PCB) – Servo\/Control interface board\u003c\/strong\u003e used in CNC systems manufactured by \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eFANUC\u003c\/span\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003ch3 data-start=\"164\" data-end=\"182\"\u003e📌 Description\u003c\/h3\u003e\n\u003cul data-start=\"183\" data-end=\"424\"\u003e\n\u003cli data-start=\"183\" data-end=\"218\"\u003e\n\u003cp data-start=\"185\" data-end=\"218\"\u003e\u003cstrong data-start=\"185\" data-end=\"201\"\u003ePart Number:\u003c\/strong\u003e A20B-2100-0820\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"219\" data-end=\"264\"\u003e\n\u003cp data-start=\"221\" data-end=\"264\"\u003e\u003cstrong data-start=\"221\" data-end=\"234\"\u003eCategory:\u003c\/strong\u003e \u003cstrong data-start=\"235\" data-end=\"262\"\u003eControl \/ interface PCB\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"265\" data-end=\"303\"\u003e\n\u003cp data-start=\"267\" data-end=\"303\"\u003e\u003cstrong data-start=\"267\" data-end=\"278\"\u003eSeries:\u003c\/strong\u003e A20B-2100 board family\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"304\" data-end=\"424\"\u003e\n\u003cp data-start=\"306\" data-end=\"424\"\u003e\u003cstrong data-start=\"306\" data-end=\"322\"\u003eApplication:\u003c\/strong\u003e Used inside the \u003cstrong data-start=\"339\" data-end=\"359\"\u003eCNC control unit\u003c\/strong\u003e for communication and signal processing between control modules.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"426\" data-end=\"446\"\u003e⚙️ Main Function\u003c\/h3\u003e\n\u003cp data-start=\"447\" data-end=\"495\"\u003eThis board typically performs functions such as:\u003c\/p\u003e\n\u003cul data-start=\"497\" data-end=\"707\"\u003e\n\u003cli data-start=\"497\" data-end=\"579\"\u003e\n\u003cp data-start=\"499\" data-end=\"579\"\u003eProcessing \u003cstrong data-start=\"510\" data-end=\"577\"\u003econtrol signals between the CNC main CPU and peripheral modules\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"580\" data-end=\"628\"\u003e\n\u003cp data-start=\"582\" data-end=\"628\"\u003eSupporting \u003cstrong data-start=\"593\" data-end=\"626\"\u003eservo interface communication\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"629\" data-end=\"707\"\u003e\n\u003cp data-start=\"631\" data-end=\"707\"\u003eManaging \u003cstrong data-start=\"640\" data-end=\"707\"\u003edata exchange between internal boards of the CNC control system\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"709\" data-end=\"736\"\u003e🧩 Typical Installation\u003c\/h3\u003e\n\u003cp data-start=\"737\" data-end=\"830\"\u003eThe \u003cstrong data-start=\"741\" data-end=\"768\"\u003eA20B-2100 series boards\u003c\/strong\u003e are installed in the \u003cstrong data-start=\"790\" data-end=\"810\"\u003eCNC control rack\u003c\/strong\u003e and connected with:\u003c\/p\u003e\n\u003cul data-start=\"832\" data-end=\"900\"\u003e\n\u003cli data-start=\"832\" data-end=\"851\"\u003e\n\u003cp data-start=\"834\" data-end=\"851\"\u003eMain CPU boards\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"852\" data-end=\"876\"\u003e\n\u003cp data-start=\"854\" data-end=\"876\"\u003eI\/O interface boards\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"877\" data-end=\"900\"\u003e\n\u003cp data-start=\"879\" data-end=\"900\"\u003eServo control modules\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"902\" data-end=\"955\"\u003eThese boards are commonly found in CNC controls like:\u003c\/p\u003e\n\u003cul data-start=\"957\" data-end=\"1008\"\u003e\n\u003cli data-start=\"957\" data-end=\"974\"\u003e\n\u003cp data-start=\"959\" data-end=\"974\"\u003eFANUC \u003cstrong data-start=\"965\" data-end=\"972\"\u003e16i\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"975\" data-end=\"992\"\u003e\n\u003cp data-start=\"977\" data-end=\"992\"\u003eFANUC \u003cstrong data-start=\"983\" data-end=\"990\"\u003e18i\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"993\" data-end=\"1008\"\u003e\n\u003cp data-start=\"995\" data-end=\"1008\"\u003eFANUC \u003cstrong data-start=\"1001\" data-end=\"1008\"\u003e21i\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1010\" data-end=\"1024\"\u003e🧠 Summary\u003c\/h3\u003e\n\u003cp data-start=\"1025\" data-end=\"1211\"\u003e\u003cstrong data-start=\"1025\" data-end=\"1211\"\u003eA20B-2100-0820 = Control\/servo interface PCB used inside FANUC CNC control systems to manage communication and signal processing between the main control unit and peripheral modules.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1213\" data-end=\"1399\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eIf you want, I can also help you with \u003cstrong data-start=\"1251\" data-end=\"1327\"\u003ea quick reference table of FANUC board prefixes (A02B, A08B, A13B, A20B)\u003c\/strong\u003e so you can \u003cstrong data-start=\"1339\" data-end=\"1398\"\u003eidentify the type of part just by looking at the number\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e","brand":"JJAutomation","offers":[{"title":"New","offer_id":44865919451272,"sku":"A20B-2100-0820","price":0.0,"currency_code":"INR","in_stock":true},{"title":"Used \/ Refurbished","offer_id":46109849813128,"sku":"A20B-2100-0820","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-2026-03-05T173925.960.jpg?v=1772712573","url":"https:\/\/jjautomation.in\/products\/fanuc-power-supply-unit-for-16i-18i-21i-a20b-8100-0720-copy","provider":"JJAutomation","version":"1.0","type":"link"}