FANUC CNC Controller A02B-0338-B500

What A02B-0338-B500 is

A02B-0338-B500 is a complete CNC controller — the control unit at the centre of a FANUC-controlled machine. It reaches this catalogue through the seller's shop, whose listing describes it as an original FANUC CNC controller under this exact number. That provenance matters for how the page is written: the identity claimed here is the listing's identity, a genuine FANUC controller unit, stocked and sold by an independent seller.

Within the controls family, this number sits beside the catalogue-named A02B-0319-B502 and the 0i Mate unit. The three are different units with different numbers; the A02B table keeps their roles side by side so a buyer holding any one of them lands on the right page.

Where A02B-0338-B500 works

A controller's working neighbourhood is the whole cabinet: its boards, its I/O, its display and the drive chain underneath. A controller is ordered when the control itself has failed or when a machine is being rebuilt around a known control; in the first case the symptom history matters, because a controller replaced for a fault that actually lives in a satellite board inherits the same stop a week later.

The desk therefore treats a controller inquiry as a system inquiry. Expect the answer to ask what has already been ruled out — power supply, boards, display — not as a delay, but because those answers are what make a controller shipment the end of the fault rather than another step in it.

Condition of A02B-0338-B500 as listed

The shop listing describes this controller as an original unit. Original is the seller's condition word for a genuine FANUC unit; it is not a promise that the unit is new, and this page does not upgrade it into one. Whether the current shelf unit is new-surplus or used is stated when the inquiry is answered, and the buyer who needs one specific condition should name it in the first message.

The condition framework is the same one the used FANUC parts page lays out: stated condition, a test before dispatch, a test video on request, and the seller's warranty standing behind the sold unit — 3 months on a used unit, in the seller's own terms.

Testing A02B-0338-B500 before dispatch

Controllers are powered and booted on the bench before dispatch; a control that cannot be brought to a ready screen does not ship as a tested unit. That bench check is the seller's standard goods test, the same one described on the test bench page, and a test video can be requested so the boot state is on record before the unit travels.

A buyer's own failed A02B-0338-B500 can travel the other way: the repair service accepts control units, and diagnosis there separates a dead controller from a controller with one dead board inside it — a distinction that decides whether the repair is priced at board level or unit level.

Ordering A02B-0338-B500

Quote the number in full — A02B-0338-B500 — with the machine builder, the machine model and the control generation shown on the machine's own documentation. If the number was read from a listing or a parts book rather than from the fitted unit, say so; numbers copied through paperwork pick up transcription errors, and the desk would rather reconcile a doubtful digit at the inquiry stage than after a shipment.

Related pages

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  FANUC CNC Controls

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  FANUC A02B Numbers