A02B-0281-K802 is a spare part used in FANUC CNC control systems.
Main Information
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Part Number: A02B-0281-K802
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Type: CNC backup / memory interface unit or cable kit
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Used With: FANUC 16i / 18i / 21i series controls
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Purpose:
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Connects the memory backup device to the CNC controller
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Used for saving and restoring CNC data
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What it is used for
Technicians use this part when they need to backup or restore:
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CNC parameters
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PMC ladder
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offsets
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NC programs
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system configuration
This is especially important before:
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Battery replacement
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Main board replacement
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Control upgrade or repair
Typical Service Situation
Example in maintenance:
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Connect A02B-0281-K802 to the controller.
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Attach a backup unit or memory device.
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Save all machine data to prevent data loss.
Simple explanation
👉 A02B-0281-K802 = FANUC CNC backup interface / cable used for saving machine data.
If you want, I can also show you the difference between:
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A02B-0281-K801
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A02B-0281-K802
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A87L-0001-0173 memory boards (#32MBA / #48MBA / #64MB / #96MB)
These parts usually work together in the same FANUC control system, and understanding them helps a lot when troubleshooting CNC memory problems. 🔧


