A20B-2101-0013 Fanuc PCB New And Original A20B-2101-0013/05R A20B21010013 A2OB-21O1-OO13

A20B-2101-0013 | FANUC βi SVSP-20/20/40-11 Servo Control PCB — A06B-6134 / Three-Axis Combined Servo-Spindle / BiSVSP

A06B-6134 BiSVSP — BETA i Combined Servo-Spindle Amplifier

The FANUC BiSVSP (BETA i Series Servo-Spindle Pack) designation identifies a unique product concept: a single compact amplifier unit that simultaneously controls multiple servo axes AND the spindle motor — eliminating the separate spindle amplifier required in standard drive system configurations.

The A20B-2101-0013 is the three-axis servo control PCB for the βi SVSP-20/20/40-11 configuration:

• Three servo axis channels: 20A + 20A + 40A peak current capacity
• One spindle channel: 11kW class spindle motor control
• One compact unit: All four channels — three servo + one spindle — in a single A06B-6134 drive

This combined approach is particularly valuable in compact CNC machine tools where cabinet space is at a premium and the machine's axis and spindle power requirements are within the BiSVSP's capacity range.

Key Specifications

Compatible β Series Servo Motors

The βi SVSP-20/20/40-11 configuration with A20B-2101-0013 is confirmed to work with:

β.2/5000 to β22/2000 servo motors: The BETA i series servo motor range — compact motors for cost-effective CNC machine tools including small machining centres, turning centres, and multi-function machines where the BiSVSP's combined servo-spindle capability provides the most space-efficient drive solution.

The absolute pulsecoder on some β series motors does not include a standard backup capacitor — the control power must be maintained during battery replacement on systems with absolute encoders to preserve position data.

Application Scenarios

βi BiSVSP servo control fault: A FANUC CNC machine with a BiSVSP A06B-6134 combined drive develops servo alarms on one or more axes. After verifying the servo motors and encoders, the A20B-2101-0013 control board is identified. Replacement restores three-axis servo and spindle control.

BiSVSP spindle control fault: The spindle function of a BiSVSP drive fails while servo axis control continues partially. The A20B-2101-0013 control board's spindle channel is identified as the fault.

FAQ

Q1: What is the BiSVSP, and how does it differ from separate servo and spindle amplifiers?

A standard FANUC drive system uses separate amplifiers — individual SVM or SVU servo drives for each axis group, plus a separate spindle amplifier (SPMC or SVS) for the spindle. The BiSVSP (BETA i Servo-Spindle Pack) combines servo and spindle amplifier functions into one unit. This reduces the number of drive units, simplifies cabinet wiring, and saves cabinet space — at the cost of flexibility, since all channels must be replaced as one unit if the drive fails.

Q2: Is A20B-2101-0013 compatible with other βi SVSP configurations beyond the 20/20/40-11?

A20B-2101-0013 is confirmed for the βi SVSP-20/20/40-11 configuration. Other BiSVSP configurations (such as the 40/40/40-15 which uses A20B-2101-0012 as the control board) use different control PCBs. The current rating and configuration of the installed drive determines the correct control board. Always confirm from the drive's nameplate and the installed board's part number label.

Q3: What happens to the spindle if only the servo axis control is faulted on A20B-2101-0013?

On the A06B-6134 BiSVSP, the servo and spindle channels share the same control board (A20B-2101-0013). A fault on the control board typically affects all channels — servo and spindle — since they share the same control PCB. Unlike a system with separate amplifiers (where a servo drive fault does not affect the spindle amplifier), a BiSVSP control board failure disables the complete unit.

Q4: Does replacing A20B-2101-0013 require servo parameter adjustment?

Servo and spindle parameters reside in the CNC's parameter memory. Replacing A20B-2101-0013 does not affect stored parameters. After fitting the replacement, the CNC downloads all relevant parameters during power-on initialisation. For absolute encoder systems: verify absolute position reference after any servo drive board replacement before resuming production.

Q5: What safety precautions apply before accessing A20B-2101-0013 inside the A06B-6134?

Power down and lock out the mains supply. The BiSVSP drive's DC bus retains charge after mains power removal — verify the DC bus is below 30V using a calibrated voltmeter before opening the drive enclosure. Handle A20B-2101-0013 with a grounded anti-static wrist strap on an ESD-safe surface.