a02b-0319-b502
FANUC Control Unit A02B-0319-B502
A02B-0319-B502 is a FANUC control unit that the seller names in its own catalogue — one of the few control units listed by number rather than by family. This page records what the catalogue states about it and how a replacement order for this number is handled.
What A02B-0319-B502 is
A02B-0319-B502 is a complete FANUC control unit: the central unit of a FANUC CNC, the part of the cabinet that runs the machine's control system and that the boards, I/O, display and drive chain all serve. The seller's primary storefront names it directly in its controls family, which makes it one of the anchor items of the controls catalogue — most control units here are stocked by series and answered on inquiry, while this number is published outright.
As with every number on this site, A02B-0319-B502 is a FANUC part number identifying a genuine FANUC unit. It is not a house model number, and nothing about the unit's origin is changed by it passing through a stockist's shelf.
Where A02B-0319-B502 sits in the machine
A control unit is replaced as a unit, but it is diagnosed as a system. The boards that plug into it — CPU, axis, memory and graphics — live in the PCBs family; the I/O units wire it to the machine; the display shows its state to the operator. A machine whose control is suspected has usually shown a symptom in one of those satellites first, and the desk will ask about them, because swapping a control unit to cure a board fault is the expensive version of the same stop.
The A02B numbers page places this unit beside the other named A02B controls and displays, and the Series 0i generation pages carry the context of the control lines the number belongs with.
Condition options for A02B-0319-B502
The catalogue names this unit without fixing one condition word to it, so the condition of the unit on the shelf is stated on inquiry rather than assumed here. Control units reach the shelf in the seller's usual conditions — original units, new-surplus or used — and the answer for this number names which of those the current unit is, so the buyer prices the actual unit and not a category.
The used FANUC parts page explains the condition ladder and the checks a buyer can ask for on any unit. For a control, the meaningful checks are that the unit powers up on the bench, that its boards are complete as fitted, and that the buyer's existing backup arrangements are thought through before the swap.
Testing A02B-0319-B502 before dispatch
A control unit is tested as a unit before it leaves: powered, booted, and run through the seller's standard goods test, with a test video available on request as it is across the service. The test bench page describes how diagnosis works when a buyer's own failed control comes in instead — the same bench culture that tests shelf units is the one that finds faults in returned ones.
If the failed unit being replaced is itself an A02B-0319-B502, it is also a repair candidate: send its number and its symptom with the replacement inquiry, and the answer can cover both the shelf unit and the bench route for the old one.
Ordering A02B-0319-B502
Order by the full number, A02B-0319-B502, exactly as printed on the fitted unit's label, and add the machine builder and model it serves. If the machine's control generation is recorded anywhere in its paperwork, include that too — generation context is what lets the desk flag a mismatch between the number ordered and the machine described, before anything ships. Quantities for control units are normally one; say so plainly if a second unit is wanted as a shelf spare.
Related pages
Send an inquiry
Send the part numbers you need, or the number of a unit you want assessed, with the machine each belongs to. One desk answers for the shelves and the bench.
Open the inquiry form