A20B-2101-0012/03B
May 22, 2026

A20B-2101-0012/03B

Model: A20B-2101-0012/03B Type: Spindle & servo amplifier control board Version: 03B hardware revision Function: IGBT drive control, speed/current closed loop, encoder signal processing, FSSB communication, fault alarm detection Weight: Approx 0.57kg Condition: Discontinued product

Description

Technical Parameters

Power Input: DC 5V, DC 24V, DC 200-400V high voltage
Interface: FSSB optical communication port
Operating Temperature: 0°C ~ 55°C
Storage Temperature: -20°C ~ 85°C
Humidity: 5% - 95% RH, non-condensing
Protection: Overcurrent, overvoltage, overheat, short circuit and encoder fault protection

Compatible Devices

Matching Amplifier: A06B-6111, A06B-6114 series
Applicable CNC: FANUC 0i, 16i, 18i, 21i, 30i-B series
Applicable Motor: αi series servo and spindle motors

Safety Instructions

  1. Power off fully and wait 5 minutes for electricity discharge before maintenance.

  2. Use anti-static protective gear to avoid circuit damage.

  3. Do not plug cables while power is on.

  4. No unauthorized circuit modification allowed.

Installation Procedure

  1. Cut off total machine power supply.

  2. Install the board into designated slot and fasten screws.

  3. Connect optical fiber, encoder and power wires properly.

  4. Confirm all connectors are firmly locked.

  5. Switch on power and test normal operation.

Maintenance

  1. Remove surface dust regularly.

  2. Inspect connectors for looseness and aging periodically.

  3. Check component temperature during running.

  4. Keep cabinet dry and free of oil mist.

Fault Troubleshooting

  1. Amplifier alarm: Check power voltage and board assembly status.

  2. Communication failure: Reconnect FSSB optical cable.

  3. Abnormal motor running: Examine encoder wiring and signals.

  4. Overheat alert: Clean cooling fan and ventilation channel.


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