Overview
The Fanuc A20B-2000-0411/04A is an I/O Module Link Connector Board engineered for FANUC CNC control systems. This PCB adapter serves as the interface between discrete I/O modules and the main control architecture, enabling reliable signal routing and module communication. As a used unit in working condition, it represents a cost-effective solution for machine builders and retrofit applications requiring functional I/O connectivity without premium OEM pricing.
Key Features
- Dedicated I/O module link connector adapter for FANUC CNC controls
- PCB-level I/O interface for modular I/O expansion
- Direct drop-in compatibility with FANUC A20B series control platforms
- Used, tested condition—functionally verified for reliable operation
- Economical alternative to new OEM replacement units
Technical Specifications
- Part Number: A20B-2000-0411/04A
- Manufacturer: FANUC
- Product Type: I/O Module Link Connector Board / PCB Adapter
- Series: A20B (FANUC Control Circuit Boards)
- Condition: Used, Tested
- Application: CNC Control I/O Interface
- Origin: Japan
Typical Applications
- FANUC CNC machine tool retrofit and repair
- I/O module replacement in existing FANUC control systems
- Machine builders integrating modular I/O expansion
- Spindle and servo control system I/O interconnection
- Industrial automation system upgrades and maintenance
Compatibility & Replacements
Compatible With
- FANUC Series CNC Control Systems
- FANUC A20B-series control architectures
- FANUC I/O module expansion platforms
- Discrete and modular I/O systems in FANUC CNCs
Replaces / Drop-In Replacement For
- Original equipment A20B-2000-0411 units
- A20B-2000-0411/04A revision boards
- Verify compatibility with your system integrator before ordering for specific machine models.
Works With
- FANUC control software and legacy CNC programming platforms
- FANUC industrial I/O module standards
- Standard CNC machine tool configurations using A20B connector interfaces





