EquipVector
Evidence-backed decisions for obsolete industrial parts

Schneider Electric · Modicon Quantum · PLC CPU · Quantum Unity processor (768kB; Modbus Plus)

Schneider Electric 140CPU65150

Discontinued

Analysis reviewed: September 12, 2026

What should replace this part?

The verified replacement is BMEP582040 (Modicon M580 standalone). This is a migration, not a drop-in swap.

Move the Quantum CPU to the M580 BMEP582040 — the Unity program survives, the rack does not

Your options

BMEP582040 — the manufacturer-named M580 processor
A standalone M580 processor with 8MB memory, 61 Ethernet devices, and 8 remote I/O racks of X80. The Quantum rack, power, and I/O still migrate around it.
New-in-box surplus bridge
A surplus dealer lists new-in-box 140CPU65150 units near $5,366. Use it to hold a running line while the M580 migration is engineered, and recheck stock and price before counting on it.

What will need to change?

HardwareThe Quantum chassis, power supply, and backplane leave for the M580 rack sized to the BMEP582040 scope of 8MB memory and 8 remote I/O racks. Re-lay the panel around the new rack dimensions.
SoftwareThe Unity application imports into the M580 engineering environment with the OEM conversion utilities. Revalidate task structure, memory partitioning, and any LL984 sections on the bench.
CommunicationsModbus Plus links on the 65150 re-architect onto Ethernet on the M580, which supports 61 Ethernet devices. Map every drop, gateway, and SCADA poll before cutover.
I/OQuantum I/O modules give way to X80 modules in the new rack. Re-address the I/O and check wiring, commons, and fusing against the X80 modules.

For anything not listed here, check the replacement manual against your existing configuration.

Need help confirming this replacement?

Send us the part number and current setup for 140CPU65150. We'll help determine whether you need a replacement, repair, original-stock sourcing, or a migration.

Request a replacement review

Can I still buy the original?

Repair — Not confirmed for this exact modelUsed — Units availableRefurbished — Not confirmed for this exact model

Lifecycle

Status: Discontinued

Discontinuation date: December 31, 2018

Lifecycle source · se.com

Technical evidence

The recommendation above is based on the sources listed here. OEM source means the manufacturer published it; third-party source means a distributor, repair company or reseller states it. Confidence reflects how directly those sources support the recommendation: High — directly supported by manufacturer documentation. Medium — supported by family-level, secondary, or otherwise less-direct evidence. Low — limited or indirect evidence; verify independently before ordering.

OEM / manufacturer sources

OEM source Confidence: High Schneider Electric (product page)
Schneider's product page discontinues the 140CPU65150 Unity processor on December 31, 2018, ends standard service on December 18, 2025, names the BMEP582040 as its replacement, and shows non-stock availability.
Source excerpt“Discontinued on: Dec 31, 2018 ... End-of-service on: Dec 18, 2025 ... 140CPU65150 is replaced by: ... BMEP582040”
View source · Note: Exact order-code page, opened and read.
OEM source Confidence: Medium Schneider Electric (support FAQ FA381441) · 2019-08-23
Schneider's support FAQ keeps Unity Quantum controllers of the 140CPU6xxx class programmable under actively sold EcoStruxure Control Expert, while Concept and 984LL software is obsolete.
Source excerpt“While this controller is obsolete, it can still be programming using the active sale EcoStruxure Control Expert programming software. Unity Controller part numbers are 140CPU6”
View source · Note: Class-level statement covering the 65150.
OEM source Confidence: Medium Schneider Electric Limited (life cycle letter PB1802.1LETTER) · 2018-02
Schneider's lifecycle letter ends Quantum CPU and communications commercialization on December 1, 2018, with the M580 as replacement and service to December 1, 2026.
Source excerpt“Quantum CPU and comms (140CPU, 140NO, 140CRP) 01/12/2018 June 2018 Modicon M580 01/12/2026”
View source · Note: Family-level dates differ from the exact-model page; the exact-model page governs.

Third-party sources

Third-party source Confidence: Low Automation Warehouse (surplus dealer)
A surplus dealer lists new-in-box 140CPU65150 units at $5,366.
Source excerpt“140CPU65150 Schneider Electric 140cpu65150 New In Box ... Sale price $5,366.00 USD”
View source · Note: Listing snapshot only; stock and price change without notice.

Limitation: The family lifecycle letter gives a later end-of-service date than the exact-model page; the exact-model page governs. The surplus listing is a snapshot, and the X80 rack layout needs a check against the M580 catalog before ordering.

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