Description
Part Number: A20B‑2100‑0784
Category: PANEL i Terminal Interface Main CPU PCB
Manufacturer: FANUC
Product Family: A20B‑2100 series (internal PCBs for CNC control/operator panels)
📋 What It Is
The A20B‑2100‑0784 is a main CPU/interface printed circuit board (PCB) used inside a FANUC PANEL i terminal or operator display module. It acts as the central logic board that links the operator panel (display and keys) to the CNC controller’s internal electronics.
⚙️ Key Functions
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🧠 PANEL i Terminal ‘Main CPU’ interface: Processes and routes communication between the operator panel’s display and input devices (e.g., LCD, soft keys, touch elements) and the CNC controller’s core logic.
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🔌 Internal control electronics: Part of the A20B‑2100 PCB family that supports CNC control system functionality at the interface layer.
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⚙️ Industrial application: Designed for use in machine tool control cabinets or operator pendant housings where FANUC controllers are installed.
📦 Typical Use
This board is typically installed inside the operator panel or display console of a FANUC CNC system (often in older or modular controllers) as part of the PANEL i terminal. It doesn’t function as a standalone component but works in conjunction with other internal boards and the main CNC controller backplane to provide the human‑machine interface.

