Schneider Electric · Modicon Quantum · PLC CPU

Schneider Electric 140CPU43412A

DiscontinuedMEDIUM

What should replace this part?

Your options

Our analysisMigrate to Modicon M580

End of commercialization with dated change notice; executive conversion plus rack and program export.

Our analysisSource refurbished / used original

Refurbished in-box and surplus units listed for the exact model; a bridge while migration is scoped.

Our analysisRepair the original

Modicon service-center repair capability listed for the exact model.

Replacement analysis

Original: 140CPU43412A (Quantum 43412A Unity CPU)

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Replacement: Modicon M580 family

Relationship: Modern platform migration (not a swap) MEDIUM

Migration / engineering work required — not a drop-in. This is not presented as a drop-in replacement.

Analyst note: OEM family EOL explicit (CN RAL21AM0001). Exact CPU mapping unverified; repair/refurb/used Tier C exact.

What changes?

Software	Concept / ProWORX / Unity executive converts to EcoStruxure Control Expert.
Hardware	Quantum rack converts to M580 X80 rack; firmware and executive convert via Unity Loader.
Programming	Program export in XEF format; conversion scope must be validated per application.

Anything not listed here is unknown — the evidence does not establish it.

Can I still buy the original?

Repair: Verified — see evidenceUsed: Verified — see evidenceRefurbished: Verified — see evidence

New-original availability is not claimed unless evidence supports it. Availability is never implied by the existence of a listing alone.

Lifecycle

Status: Discontinued

Discontinuation date: 2022-12-31

Lifecycle source

Evidence

Every important claim traces to a source below. OEM source means the manufacturer published it; third-party source means a distributor, repair company or reseller states it; our analysis connects them — and is labeled as such.

OEM / manufacturer sources

OEM source MEDIUM Schneider Electric · Tier A · 2021-01-21

All remaining Quantum refs removed from active sale Dec 31 2022

“All remaining Quantum part numbers will be removed from active sale Dec 31, 2022. Obsolescence ... ranges from 1/15/2023 through 12/31/2023.”

Establishes: modern_platform_migration · View source · Note: Doc landing page; PDF not opened

OEM source MEDIUM Schneider Electric · Tier A

Transition to Modicon M580 via Unity M580 Application Converter

“transition to Modicon M580 systems ... Unity M580 Application Converter Tool”

Establishes: modern_platform_migration · View source · Note: Family-level

Third-party sources

Third-party source LOW Automation Planet UK · Tier C

Refurbished in box like new + in-stock surplus $1968 + Modicon repair center listing

“140CPU43412A Refurbished in box like new”

Establishes: refurbished_same_unit · View source · Note: Exact model; availability only

Why you might be searching this

Quantum CPU fault after end-of-sale; refurb bridge or M580 migration?

Related replacement analyses

Schneider Electric TSX P57 4634M — Same plc cpu line

Need help deciding between repair, replacement, or migration?

Request a replacement review for 140CPU43412A — repair assessment, sourced original, replacement quote, or migration scoping.

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Research status: done. Confidence MEDIUM reflects the evidence above, not marketing. Commercial paths: Refurbished unit · Repair service · Modicon M580 quote. No search-volume, pricing or revenue claims are made on this page.