A20B-2101-0581 Fanuc 200VAC CNC Power Supply Circuit Board

Description

Fanuc A20B-2101-0581 is a high-precision power supply circuit board measuring 200 mm by 150 mm, designed for regulated voltage distribution within CNC control systems. The unit features a multi-layer fiberglass epoxy substrate populated with high-grade electrolytic capacitors, surface-mount resistors, and integrated voltage regulation circuits. It utilizes high-density multi-pin connectors for secure interface with the backplane and peripheral modules. The hardware architecture ensures stable 5 VDC and 24 VDC output rails from a nominal 200 VAC input source, maintaining signal integrity across the control bus.

A20B-2101-0581 Specifications
Model: A20B-2101-0581
Brand: Fanuc
Category: CNC Power Supply Board
Compatibility: Fanuc Series 16i / 18i / 21i Model A/B
Input Voltage: 200 VAC to 240 VAC
Output Voltage 1: 5 VDC
Output Voltage 2: 24 VDC
Mounting Type: Slot-in / Plug-in
Dimensions: 200 mm x 150 mm x 30 mm
Weight: 0.45 kg
Substrate Material: FR-4 Fiberglass
Connector Type: Multi-pin High-density
Operating Temperature: 0 to 55 °C
Storage Temperature: -20 to 75 °C
Humidity: 10 to 90 % Non-condensing
Country of Origin: Japan

A20B-2101-0581 Applications
Primary applications include integration into Fanuc 16i, 18i, and 21i series CNC control cabinets for power distribution to main CPUs and I/O modules. Deployed within vertical machining centers, CNC lathes, and automated industrial milling systems requiring stable logic-level voltage regulation.