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Brand | Fanuc |
Status | NEW/USED |
Warranty | 12 months/3 months |
Type | Power PCB A20B-2101-0350 |
High-precision control | Use advanced algorithms to achieve precise speed and position control and improve equipment performance. |
Efficient heat dissipation design | Optimize heat dissipation structure to ensure long-term stable operation and reduce failure rate. |
Modular integration | Compact design, easy to install and maintain, and supports flexible system expansion. |
The Fanuc A20B-2101-0350 Circuit Board is a high-performance OEM control PCB engineered in Japan for precision signal processing, stable communication, and long-term reliability within Fanuc CNC systems. As an essential component for machine tool operation, this board facilitates accurate data exchange between the CPU, servo and spindle modules, operator panel interfaces, and external I/O devices.
Available in both brand-new and certified used conditions, the A20B-2101-0350 offers a flexible and cost-effective solution for maintenance teams looking to reduce downtime without sacrificing CNC performance or reliability.
Manufactured under Fanuc’s strict Japanese quality standards, this board features:
High-density multilayer PCB design for precision signal routing
Reinforced connectors and solder joints for vibration-heavy environments
Industrial-grade electronic components optimized for 24/7 machining
Stable operation even under thermal fluctuation and electrical noise
These characteristics ensure consistent CNC control performance during long production runs.
The A20B-2101-0350 provides:
Low-latency communication with servo/spindle amplifiers
Fast execution of control logic for complex machining programs
Reliable command synchronization across machine axes
Smooth machine response under high-speed or continuous load conditions
This directly supports productivity, machining precision, and reduced cycle times.
Common applications include:
Fanuc 0i Series
Fanuc 16i / 18i / 21i systems
Custom OEM control panels and automation platforms
Since compatibility may vary by machine builder and software version, a verification check is recommended prior to purchase.
Typical failure indicators include:
CNC system not powering up
Intermittent control freezing or unexpected shutdowns
Servo or spindle communication alarms (e.g., “SERVO NOT READY”)
Incorrect or unresponsive I/O signals
Burnt components, capacitor leakage, or overheating PCB areas
Such issues can be caused by electrical surges, aging components, coolant contamination, or damage to surrounding modules.
Before ordering, check:
Existing PCB part number printed on your current board
CNC control model and machine tool manufacturer
Presence of specific I/O expansions or PMC units
Necessary software or EPROM compatibility
We offer free compatibility validation—send us a clear photo of your existing board or control unit label.
Backup all machine parameters before removing old hardware
Inspect power supply units to prevent damage to the new board
Clean all connectors and check for oxidation or coolant residue
Ensure stable grounding to reduce electrical noise interference
After installation, run diagnostics and monitor servo/spindle behavior
Proper installation helps avoid recurring faults and ensures optimal CNC function.
It handles CNC logic processing, signal routing, and communication between key modules including CPU, servo amplifiers, spindle control, and machine I/O systems.
Yes—certified used boards offer a cost-effective alternative, especially for older machines. However, new boards provide longer lifespan and maximum reliability for high-production environments.
Check for:
Boot errors or sudden resets
Servo/spindle alarm codes
Overheated components
Faulty I/O or inconsistent signals
Fans, power supplies, and grounding issues that may contribute to failure
Typically, only parameter restoration is required. Some systems may require EPROM compatibility checks depending on machine configuration.
The most common reasons include:
Power fluctuations or surges
Coolant and oil mist contamination
Excessive heat in the CNC cabinet
Aging capacitors and solder fatigue
✔ 100% original Japan-made Fanuc parts
✔ Both new and used options with warranty
✔ Expert assistance for part identification and compatibility
✔ Fast worldwide shipping to reduce machine downtime
✔ Trusted by CNC repair centers, factories, and machine tool distributors
Weite Welcomes Your Inquiries for More Fanuc Parts