A02B-0281-K801 is a FANUC CNC spare part.
It is specifically a backup unit cable used with FANUC CNC controllers.
Details
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Part Number: A02B-0281-K801
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Type: Cable for backup unit
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Function: Connects the backup memory unit to the CNC control system.
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Typical Use:
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Backing up CNC parameters
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Backing up programs (NC programs)
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Restoring data if the control loses memory
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Where it is used
This cable is used in FANUC control systems, commonly with:
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Series 16i / 18i / 21i and similar CNC controls
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Maintenance or service when connecting an external backup device.
Practical example
Technicians use this cable when they:
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Save machine parameters
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Save ladder / PMC data
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Backup CNC programs before battery change or board replacement.
✅ In short:
A02B-0281-K801 = FANUC backup unit cable for CNC data backup.
If you want, I can also explain the other part numbers you sent earlier (like A87L-0001-0173#32MBA / #48MBA / #64MB / #96MB) and how they work together in the FANUC control system.