Description
📌 FANUC A16B-3200-0495 — Main CPU PCB (0i-Mate / 0i-B Controller)
Description:
The FANUC A16B-3200-0495 is a main CPU printed circuit board (PCB) used as the central processing board for FANUC CNC controllers — most commonly in the 0i-Mate / 0i-B series control family. It serves as the core mainboard (motherboard) that runs the CNC system’s firmware, processes G-code, coordinates motion control, handles I/O communications, and interfaces with other control modules.
Key Features & Function:
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🧠 Main CPU Board: Acts as the brain of the FANUC CNC controller, executing CNC control logic and handling machine operations.
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📍 Controller Family: Typically used in FANUC 0i-Mate / 0i-B controllers — a popular controller type on many CNC mills, lathes, and machining centers.
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🔌 Integration: Interfaces with the controller’s memory modules, I/O modules, servo/spindle interfaces, and operator panel to form a complete CNC control system.
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⚙️ System Operation: Central board responsible for interpreting programs (G/M code), managing machine motion, coordinating axes, and executing system commands from operator input or program instructions.
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📦 Replacement Needs: When replacing this board, you’ll typically need to re-load machine parameters and program data from backups, as the board on its own usually doesn’t retain machine-specific data.
Application:
Commonly installed in the control cabinet of CNC machines using FANUC 0i-Mate or similar 0i control variants. It’s essential hardware — without it the controller cannot operate.

