Procure now the A20B-2101-0224 — Atlantechdrives provides this FANUC Servo Amplifier Power Circuit Board, the second internal power PCB within the FANUC A06B-6107-H001 6-Axis Servo Amplifier for R-J3iC and R-30iA robot controllers. A critical spare for high-payload FANUC robot maintenance teams. Worldwide express delivery with 12-month warranty.
What Is the A20B-2101-0224?
The A20B-2101-0224 is a Servo Amplifier Power Circuit Board manufactured by FANUC Ltd. (Japan), installed as one of the two power PCBs inside the FANUC A06B-6107-H001 6-Axis Servo Amplifier. It works in tandem with the A20B-2101-0234 power board and the A16B-3200-0610 control board to form the complete internal PCB assembly of the A06B-6107-H001. The distinction between the A20B-2101-0224 and the A20B-2101-0234 lies in their axis assignments within the 6-axis amplifier architecture — each power board manages a specific group of axes within the 6-axis output stage, enabling the amplifier to drive the high-torque servo motors of robots such as the R-2000iB/200T, M-900iA/260L, M-900iA/350, M-410iB, and M-900iA/600. The A06B-6107-H001 is rated for 3-phase 200–240 VAC input, 5.6 kW total output power, and a maximum combined output current of 125 A across all six axes. A notable detail: in the successor amplifier variant A06B-6107-H001#B, the A20B-2101-0224 is replaced by the updated A20B-2101-0221 — confirming that the #B variant is not fully interchangeable at PCB level with the original A06B-6107-H001. When sourcing individual replacement boards, it is essential to match the exact PCB part number to the amplifier revision installed in the robot cell.
Key Technical Specifications
- Part Number: A20B-2101-0224
- Board Type: Servo Amplifier Power Circuit Board (internal PCB)
- Parent Unit: FANUC A06B-6107-H001 6-Axis Servo Amplifier (original, not #B)
- Compatible Controllers: FANUC R-J3iC, FANUC R-30iA
- Input Voltage (parent unit): 3-phase 200–240 VAC
- Single-phase Control Power: 200–240 VAC
- Total Output Power (parent unit): 5.6 kW
- Maximum Output Current (parent unit): 125 A combined
- Successor Board (in #B variant): A20B-2101-0221
- Companion Boards in Same Unit: A20B-2101-0234 (power board 1), A16B-3200-0610 (control board)
- Communication Interface: Optical fiber FSSB via A16B-3200-0610
- Manufacturer: FANUC Ltd., Oshino-mura, Yamanashi, Japan
- Status: Discontinued — available as surplus/replacement part
Robot Model Compatibility and Deployment Context
The A06B-6107-H001 amplifier — and therefore the A20B-2101-0224 — is specific to FANUC’s heaviest payload robot models of the R-2000iB and M-900iA generations, used primarily in automotive body assembly, press-tending, heavy stamping, and large-scale palletising applications. These installations typically involve multi-robot cells with tightly coupled production sequences, where unplanned downtime for a single robot has a disproportionate impact on overall line output. In automotive plants running continuous production schedules, even a 2–4 hour servo amplifier repair window represents significant production loss, which drives demand for pre-positioned spare PCBs at plant level. Maintenance engineers responsible for these cells typically hold spare sets of A20B-2101-0234, A20B-2101-0224, and A16B-3200-0610 as a matched board set, allowing rapid swap-out without waiting for parts delivery. Atlantechdrives can supply all three boards individually or as a matched set, with express shipping to minimise robot downtime.
Installation Advice
The A20B-2101-0224 and A20B-2101-0234 are both installed inside the A06B-6107-H001 amplifier enclosure and are accessible after removing the amplifier front cover. Before opening the unit, isolate the R-30iA controller from mains power and allow a minimum of 5 minutes for the DC bus capacitors to discharge — verify with a voltmeter that bus voltage is below 30 VDC before touching any internal component. The two power boards are connected to the amplifier chassis via edge connectors and multiple signal harness connectors; photograph all connections before removal. When installing the replacement A20B-2101-0224, ensure all connector locking tabs are fully engaged — a partially seated connector on a power board will cause intermittent servo faults that are extremely difficult to diagnose without re-opening the amplifier. Note that the A20B-2101-0224 is not compatible with the A06B-6107-H001#B variant, which uses the A20B-2101-0221 instead — always verify the amplifier’s serial number plate and order code before purchasing the replacement board. After installation, power up the robot controller with the robot in emergency stop and verify that all six axes show normal servo ready status on the R-30iA teach pendant before releasing the system to automatic operation.
Frequently Asked Questions
Q: What is the difference between the A20B-2101-0224 and the A20B-2101-0234, and can they be swapped?
A: Both are power circuit boards within the A06B-6107-H001, but they serve different axis groups within the 6-axis output stage and are not interchangeable. Each board has a dedicated position and connector assignment within the amplifier. Installing the A20B-2101-0224 in the slot designated for the A20B-2101-0234 (or vice versa) will cause immediate servo faults and potential hardware damage.
Q: Can I use an A20B-2101-0221 as a replacement for the A20B-2101-0224?
A: The A20B-2101-0221 is the updated power board used in the A06B-6107-H001#B (revised) amplifier variant and is not guaranteed to be a drop-in replacement for the A20B-2101-0224 in the original A06B-6107-H001. FANUC revised the internal PCB set when releasing the #B variant. Always use the exact part number matching your installed amplifier revision to ensure compatibility and avoid warranty or reliability issues.
Q: How can I confirm which amplifier variant I have — A06B-6107-H001 or A06B-6107-H001#B — before ordering?
A: Check the order specification label on the side or rear of the amplifier unit. The original variant will show order code A06B-6107-H001 without any suffix, while the revised variant shows A06B-6107-H001#B. The internal PCB set also provides a visual confirmation: the original unit contains A20B-2101-0224 + A20B-2101-0234 + A16B-3200-0610, while the #B unit contains A20B-2101-0221 + A20B-2101-0234 + A16B-3200-0610.
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