Description
Description:
The FANUC A20B‑3300‑0312 is a Pentium‑based CPU module printed circuit board designed for use in FANUC CNC controller systems, especially the 21i‑B and 210i‑SB series. It serves as the central processing board that handles control logic and execution of programs within these controllers.
🧠 Key Details
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Type: CPU module / control PCB – core processing board for a CNC system.
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Processor & Memory: Uses a Pentium architecture with 16 MB DRAM memory (soldered on board rather than removable).
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Compatibility: Typically used with FANUC 21i‑B and 210i‑SB series controllers — common on industrial milling and turning machines controlled by FANUC hardware.
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Function: Executes CNC control software, manages machine motion control tasks, logic processing, and communications with other PCB modules (I/O, display, axis controllers).
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Installation: Mounted inside the CNC controller rack; replacing it usually requires restoring backed‑up machine settings afterward.
🛠️ Use Case:
This board is a critical part of the controller’s “brain” — without it, the CNC system will not initialize or run programs. It’s commonly sourced as new, refurbished, or tested used modules from FANUC parts suppliers.
✅ Summary:
The A20B‑3300‑0312 is a CPU board with 16 MB DRAM for FANUC 21i‑B/210i‑SB CNC controllers, responsible for processing machine control logic and programs in industrial settings.