New Fanuc Board A20B-8200-0847 A20B82000847 A2OB-82OO-O847

A20B-8200-0847 | FANUC Series 0i-D Main PCB A3 — Central Motherboard / CPU Integration / A20B-8200 Series / 0i-D CNC Platform

Series 0i-D — FANUC's Most Widely Deployed CNC

The FANUC Series 0i-D is the fourth model generation in the 0i CNC family. The 0i product line has been FANUC's highest-volume CNC platform since its introduction — the choice for general-purpose machine tools worldwide where the full capability of the Series 16i/18i/21i is not required, but reliable, modern CNC performance is.

The 0i-D brought a hardware generation step from the 0i-C (described elsewhere in this session) — with updated architecture, improved servo performance, and expanded I/O connectivity for modern machine tools.

Key Product Information

A20B-8200 — The 0i-D Main PCB Series

The A20B-8200 series is the primary main PCB family for FANUC 0i-D CNC systems. Multiple variants in this series serve different 0i-D configurations:

• A20B-8200-0847: 0i-D MAIN PCB A3 — this product
• Other A20B-8200 boards serve related 0i-D configurations or functional variants within the same platform

The series designation A20B-8200 itself identifies the 0i-D generation mainboard platform — distinguishing it from the 0i-C generation (which used the A20B-8100 series boards) and the earlier generations.

Application Scenarios

0i-D CNC main board failure: A FANUC 0i-D machining centre or turning centre develops CNC-level system faults — boot failure, persistent system alarms, or total CNC unresponsiveness. Backup of all SRAM data is performed, and the A20B-8200-0847 is replaced. SRAM data is reloaded and CNC operation is restored.

0i-D control system refurbishment: A 0i-D CNC system showing age-related intermittent failures is refurbished with a replacement A20B-8200-0847 main PCB.

FAQ

Q1: What does "A3 Main PCB" mean in the A20B-8200-0847 designation?

The "A3" is the hardware type designation for this specific main PCB within the 0i-D platform. FANUC uses these letter-number combinations (A3, A4, A5) to distinguish different hardware generations or configurations of main boards for the same CNC platform family. The A3 designation identifies A20B-8200-0847's specific board variant for the 0i-D CNC.

Q2: Must SRAM data be backed up before replacing A20B-8200-0847?

Yes. All CNC parameters, PMC programme, part programmes, and tool/work data stored in SRAM must be backed up before replacing the main PCB. After fitting A20B-8200-0847, the SRAM data must be reloaded.

Q3: Is A20B-8200-0847 compatible with 0i-C systems?

No. The A20B-8200 series is specific to the 0i-D platform. The 0i-C generation used the A20B-8100 series main PCBs (e.g., A20B-8100-0770 and related boards). The 0i-D and 0i-C use different hardware architectures — boards from these two generations are not interchangeable.

Q4: What does "fully populated" mean and how does it affect sourcing A20B-8200-0847?

Industrial Automation Co notes: "flat rate pricing does not apply if fully populated" for A20B-8200-0847. "Fully populated" refers to a main PCB with all available option connectors, headers, or components fitted — as opposed to a base configuration with only the standard connectors. When sourcing a replacement, confirm whether the installed board is standard or fully populated to ensure the replacement matches the machine's wiring configuration.

Q5: What is the 0i-D's position in the 0i model family history?

The FANUC 0i model progression: 0i-A → 0i-B → 0i-C → 0i-D → 0i-F (current). Each generation brought updated hardware, improved servo performance, and expanded CNC capabilities.