system board A20B-8200-0396 A2OB-82OO-O396 A20B82000396

A20B-8200-0396 | FANUC Zero-i Mate-C (0i Mate Model C) Main PCB — LCD-Mounted / FSSB / A02B-0311-B5xx Systems

Zero-i Mate-C — Economy CNC With i-Generation Capabilities

The FANUC Zero-i Mate-C (Series 0i Mate Model C) is the compact, economy variant of the 0i-C platform. The "Mate" suffix identifies this as the reduced-configuration system within the 0i family — optimised for simpler machine tools (2 to 3 axis lathes, compact machining centres, and basic drilling machines) where the full 0i-C's axis count and I/O complement exceed what the application needs.

Within the 0i Mate-C generation, the A20B-8200-0396 main PCB is the master board — the physical foundation of the control unit on which all option modules, CPU cards, and memory modules are mounted. Every function of the 0i Mate-C CNC — axis motion control, spindle speed regulation, PMC machine sequence logic, operator display, and communication — depends on this board being intact and functional.

Key Specifications

0i Mate-C vs 0i-C — Compact Platform, Same Architecture

The 0i Mate-C shares the same hardware generation as the 0i-C (using the same A20B-8200 series main boards), but with differences in configuration:

Fewer axes: The 0i Mate-C typically supports 2 to 3 controlled axes, compared to the 0i-C's higher maximum.

Reduced I/O: The Mate configuration provides sufficient I/O for simple machine tools without the extended I/O capacity of the full 0i-C.

Smaller module complement: The Mate control unit is physically more compact, with fewer board slots and a smaller total module count.

The A20B-8200-0396 is the master board for the Mate variant — its specific connector layout and slot configuration match the 0i Mate-C control unit rather than the full 0i-C.

Application Scenarios

0i Mate-C CNC main board failure: A lathe with a FANUC 0i Mate-C CNC fails to start — the display shows no content and the system makes no response on power-on. After confirming the power supply is correct, the A20B-8200-0396 is identified as the failed main board. Fitting the replacement, reinstalling the original memory modules, and restoring from parameter backup returns the lathe to production.

0i Mate-C control unit refurbishment: An older 0i Mate-C CNC control unit is refurbished for reuse. The A20B-8200-0396 is replaced to reset the main board's service life, ensuring the refurbished unit starts with reliable hardware.

FAQ

Q1: What is the difference between A20B-8200-0395 and A20B-8200-0396?

Both are Zero-i Mate C Main PCBs in the A20B-8200-039x range. Adjacent part numbers in this range represent either hardware revisions of the same board or variants serving slightly different 0i Mate-C configurations (different machine type variants or option module configurations). Confirm the target system's exact controller designation (A02B-0311-B5xx) against the spare parts list to determine which main board variant is correct for that specific controller.

Q2: Do I need to reload the CNC system software after replacing the A20B-8200-0396?

If the FROM (Flash ROM) modules are transferred intact from the original main board to the replacement, the CNC system software is preserved. The FROM modules are plug-in items — they are not soldered to the main board — so they can be moved to the replacement board. If the FROM modules are not transferred (or if they were damaged), the CNC system software must be reloaded from the original installation media.

Q3: How is the SRAM battery backup affected when the A20B-8200-0396 is replaced?

SRAM modules are battery-backed to retain parameters and programmes during power-off. The battery for SRAM backup may be on the main board itself or on a separate battery unit, depending on the specific 0i Mate-C configuration. Confirm the battery location before replacement. If the SRAM battery is on the main board and the old board is removed, the SRAM modules may lose power — perform a full parameter and programme backup before starting the main board replacement.

Q4: What does the FSSB/graphics combined card do, and is it transferred during main board replacement?

The FSSB/graphics combined card plugs into the main board and performs two functions: FSSB generates the servo communication fibre optic signals for the connected servo amplifiers; graphics generates the video signal for the LCD display. This card plugs into the main board's dedicated slot. During main board replacement, remove this card from the old main board and reinstall it in the same slot on the A20B-8200-0396 replacement. It does not need to be replaced unless it is also damaged.

Q5: What CNC data backup is essential before replacing the A20B-8200-0396?

Before replacement: back up all CNC parameters (ALL IO backup), all stored part programmes, tool offset data, work offset data, PMC ladder programme, and mastering data (absolute encoder position data). Without a complete parameter backup, restoring the machine after main board replacement requires obtaining the original machine builder's parameter file — a process that can cause extended downtime if those files are not readily available.