{"product_id":"fanuc-option-pcb-for-16i-18i-21i-a20b-8100-0335","title":"Fanuc Option PCB for 16i\/ 18i\/ 21i A20B-8100-0335","description":"\u003cp data-start=\"92\" data-end=\"448\"\u003eThe \u003cstrong data-start=\"96\" data-end=\"114\"\u003eA20B‑8100‑0335\u003c\/strong\u003e is a \u003cstrong data-start=\"120\" data-end=\"151\"\u003ecommunication interface PCB\u003c\/strong\u003e used in FANUC CNC controllers. Specifically it’s designed to handle \u003cstrong data-start=\"220\" data-end=\"275\"\u003eserial data communication using the RS‑422 protocol\u003c\/strong\u003e — often for functions like DNC (Direct Numerical Control) or connecting the CNC to external devices, networks, or communication links. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"450\" data-end=\"479\"\u003e🔌 What This Board Does\u003c\/h3\u003e\n\u003cul data-start=\"480\" data-end=\"1262\"\u003e\n\u003cli data-start=\"480\" data-end=\"790\"\u003e\n\u003cp data-start=\"482\" data-end=\"790\"\u003e🧠 \u003cstrong data-start=\"485\" data-end=\"526\"\u003eSerial Communication Module (RS‑422):\u003c\/strong\u003e Provides a \u003cstrong data-start=\"538\" data-end=\"590\"\u003ehigh‑speed RS‑422 serial communication interface\u003c\/strong\u003e on the CNC controller. This is typically used for \u003cstrong data-start=\"641\" data-end=\"674\"\u003eDNC2 or remote communications\u003c\/strong\u003e with PCs, PLCs, or other equipment that exchange program data with the CNC. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"791\" data-end=\"1059\"\u003e\n\u003cp data-start=\"793\" data-end=\"1059\"\u003e🔄 \u003cstrong data-start=\"796\" data-end=\"829\"\u003ePart of the A20B‑8100 Family:\u003c\/strong\u003e FANUC’s A20B‑8100 series includes various interface and extension boards — such as RS‑232\/RS‑422 serial boards, Ethernet, PROFIBUS, DeviceNet, etc. The \u003cstrong data-start=\"982\" data-end=\"1018\"\u003e0335 variant is the RS‑422 board\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1060\" data-end=\"1262\"\u003e\n\u003cp data-start=\"1062\" data-end=\"1262\"\u003e🔩 \u003cstrong data-start=\"1065\" data-end=\"1078\"\u003eMounting:\u003c\/strong\u003e Installed inside the controller’s electronics cabinet, typically in a \u003cstrong data-start=\"1149\" data-end=\"1172\"\u003emini expansion slot\u003c\/strong\u003e or communication slot on the motherboard\/backplane. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1264\" data-end=\"1300\"\u003e📊 Typical Role in CNC Systems\u003c\/h3\u003e\n\u003cul data-start=\"1301\" data-end=\"1659\"\u003e\n\u003cli data-start=\"1301\" data-end=\"1413\"\u003e\n\u003cp data-start=\"1303\" data-end=\"1413\"\u003e📤 Enables \u003cstrong data-start=\"1314\" data-end=\"1338\"\u003eserial data transfer\u003c\/strong\u003e between the CNC and external devices (e.g., sending\/receiving programs).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1414\" data-end=\"1534\"\u003e\n\u003cp data-start=\"1416\" data-end=\"1534\"\u003e📡 Often used in setups where CNCs integrate with host computers, DNC networks, or remote debugging\/logging systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1535\" data-end=\"1659\"\u003e\n\u003cp data-start=\"1537\" data-end=\"1659\"\u003e💻 Supports industrial communication standards (RS‑422) that are more robust and faster than RS‑232 for longer cable runs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1661\" data-end=\"1694\"\u003e⚙️ Notes \u0026amp; Practical Points\u003c\/h3\u003e\n\u003cul data-start=\"1695\" data-end=\"2189\"\u003e\n\u003cli data-start=\"1695\" data-end=\"1862\"\u003e\n\u003cp data-start=\"1697\" data-end=\"1862\"\u003e🔁 \u003cstrong data-start=\"1700\" data-end=\"1718\"\u003eCore Exchange:\u003c\/strong\u003e Some vendors require a \u003cstrong data-start=\"1742\" data-end=\"1759\"\u003ecore exchange\u003c\/strong\u003e when purchasing, meaning the old board is returned for credit. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1863\" data-end=\"2017\"\u003e\n\u003cp data-start=\"1865\" data-end=\"2017\"\u003e🛠 \u003cstrong data-start=\"1868\" data-end=\"1879\"\u003eRepair:\u003c\/strong\u003e Not all suppliers offer repair services for this board — some sell only tested\/refurbished units. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2018\" data-end=\"2189\"\u003e\n\u003cp data-start=\"2020\" data-end=\"2189\"\u003e🔌 If this board fails (or is missing) and your machine is configured to use RS‑422\/DNC functions, you may see communication errors during data transfer to\/from the CNC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JJAutomation","offers":[{"title":"New","offer_id":44838895845512,"sku":"A20B-8100-0335","price":0.0,"currency_code":"INR","in_stock":true},{"title":"Used \/ Refurbished","offer_id":46109847617672,"sku":"A20B-8100-0335","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-2026-02-25T142251.915.jpg?v=1772009580","url":"https:\/\/jjautomation.in\/products\/fanuc-option-pcb-for-16i-18i-21i-a20b-8100-0335","provider":"JJAutomation","version":"1.0","type":"link"}