Digital guide
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FANUC A20B-3400-0020
Product Name: FANUC Series 30i/31i-B Main CPU Board
Product Introduction: The FANUC A20B-3400-0020 is a high-performance multi-axis master CPU board designed for FANUC Series 30i/31i/32i-B CNC control architectures. It executes high-speed NC software, path interpolation, and PMC machine logic for advanced multi-axis machining centers.
Detailed content
Technical Specifications:
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Parameter
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Value
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|---|---|
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Manufacturer
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FANUC
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Part Number
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A20B-3400-0020
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Compatible Series
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FANUC Series 30i-B, 31i-B, 32i-B
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Board Type
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Master CPU / Motherboard PCB
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Memory
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32 MB SDRAM
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Mounting Style
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Controller Backplane Slot-Mount
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Cooling Method
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Natural Convection / Cabinet Airflow
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Operating Temperature
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0°C to 45°C
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Protection Rating
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IP20
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Functional Features:
- Executes high-speed NC software and path interpolation
- Manages multi-path kinematics for synchronized axis control
- Handles PMC (machine ladder logic) execution
- Supports complex high-speed machining algorithms
Installation Requirements:
- Controller backplane slot mounting
- Ensure stable regulated power supply
- Maintain pristine cabinet climate control
Usage Notes:
- Board is exceptionally vulnerable to electrostatic discharge
- Always use certified grounded ESD wrist strap
- Handle PCB strictly by edges or frame brackets
- Complete full system image backup (FROM/SRAM) via CF card or Ethernet before replacement
- Never force card into rack slot; align multi-pin edge connector carefully
- Verify all sub-boards, graphic cards, and memory modules are seated securely
- Model A and Model B architectures are not directly interchangeable
