Description:

The Fanuc A20B-2902-0390 Drive Circuit Main Board is used in CNC servo and spindle drive systems for motion control and power regulation. Commonly installed in Fanuc Alpha i series spindle drives (PSM-15 to PSM-37) used in CNC machining centers, lathes, and automated production equipment. Maintenance teams, OEMs, and system integrators use this board for drive repair, replacement, and CNC system restoration.

Applications:

The Fanuc A20B-2902-0390 drive circuit board is used in industrial CNC systems to control and regulate spindle and servo drive operations. It is widely applied in CNC lathes, machining centers, and automated manufacturing systems where stable motor control, power distribution, and precise motion performance are critical for machining accuracy and system reliability.

Technical Specifications:

• Manufacturer Part Number (MPN): A20B-2902-0390
• Product Type: Drive Circuit Main Board / PCB
• Brand: Fanuc
• Function: Spindle and servo drive control
• System Type: CNC drive and motion control systems
• Compatible Drives: Alpha i Power Supply Modules (PSM-15 to PSM-37)
• Power Range: 15 kW to 37 kW spindle systems
• Board Type: Driver module / PCB assembly
• Application: CNC spindle and servo drive control
• Mounting: Integrated within drive unit
• Compatibility: Fanuc CNC machines and automation systems
• Construction: Industrial-grade PCB for high-reliability operation
• Status: Discontinued by manufacturer (support via surplus/repair channels)

Common Replacements:

• Fanuc A20B-2902-0550
• Fanuc A20B-2902-0374
• Fanuc A20B-2902-0420