Schneider

Rabwellplc stocks Schneider Modicon PLC platforms across the entire active and legacy lineup — Modicon Quantum, M580, M340, Premium, M258, M238, M221, M218, M208, Twido, plus TM2/TM3/TM5 expansion — for plants, OEMs, and integrators who need to replace failed processors, expand existing racks, or keep an installed Modicon base running while a long-term migration is planned. Schneider's installed base in North American water/wastewater, building HVAC, packaging machinery, and process plants is huge, and many of those plants still rely on Quantum and Premium PLCs that left current production years ago. We focus inventory there.

Product Lines We Stock

Modicon Quantum (140 series) — high-end legacy CPUs (140CPU11302, 43412A, 53414A/B, 65150, 65160, 65260), HotStandby (140CHS11000), Ethernet (140NOE77101), ControlNet (140NOC), ASCII serial (140ESI06210), and CRP/CRA remote I/O drops (140CRP31200, 140CRA31200). For plants on Concept, ProWORX 32, or Unity Pro, we keep both new and tested surplus.

Modicon M580 — current ePAC platform on EcoStruxure Control Expert. CPUs BMEP581020, BMEP582040, BMEH586040 (HotStandby), BMEP58CPROS3 (Safety), with BMEXBP1200 12-slot X80 backplane.

Modicon M340 — mid-range PLC. CPUs BMXP3420302, BMXP342000; analog input BMXAMM0600, BMXAMI0410; analog output BMXAMO0210, BMXAMO0802; digital I/O BMXDDI1602H, BMXDDM3202K, BMXDDM16022, BMXDRA1605; communication BMXNOM0200/0200H Modbus, BMXPRA0100; power supply BMXCPS2010, BMXCPS3020; rack BMXXBP0600.

Modicon Premium (TSX) — installed-base platform on Unity Pro. P57 family (TSXP57103M, 57104M, 57202, 57204M, 57303M, 57454M, 572623M, 572823M), I/O (TSXAEY414, TSXDMY28FK), motion (TSXCAY33), Ethernet (TSXETY4103), memory cards (TSXMRPC01M7, TSXMFPP224K, TSXMRPP128K/224K/384K), TSX Micro 3710 racks, fiber port (TSXFPP20).

Modicon M258 / M238 / M221 / M218 (machine controllers) — TM258LF42DT4L, TM258LF66DT4L, TM218LDA24DRHN, TM218LDA24DRN, TM218LDA40DRHN, TM218LDA40DRPHN, TM218LDA40DRN, TM208LDA40DRN. Programmed in EcoStruxure Machine Expert (formerly SoMachine).

TM2 / TM3 / TM5 expansion I/O — TM3DI8G, TM3DI32K, TM3DQ32UK, TM3DM8RG, TM3AM6G; TM2DDO8UT, TM2AMI8HT, TM2AMI2HTN, TM2AMI4HTN, TM2AMM3HT, TM2ALM3LT; TM5SAO2L, TM5NS31 EtherCAT interface; TMASD1 SD memory card.

Twido and Momentum legacy — TWDNAC485T Modbus expansion, 171CCS76000 Momentum processor adapter.

How to Choose

Anchor the decision in the engineering software the plant is committed to. Concept and ProWORX 32 lock you to Quantum 140 family; Unity Pro / EcoStruxure Control Expert covers Quantum, Premium, M340, and M580; EcoStruxure Machine Expert covers M221/M238/M251/M258/M262 machine PLCs. Mixed-fleet plants standardise on Control Expert plus M580 for control rooms and Machine Expert plus M2xx on the machines.

Then size to rack architecture. M580 and M340 use the X80 backplane (BMXXBP for M340, BMEXBP for M580) and share modules across both — meaning a plant migrating from M340 to M580 keeps the rack and most I/O. Quantum is on its own backplane; Premium is on TSX RKY backplanes; both are non-mixable.

For redundancy and safety, M580 HotStandby (BMEH586040) is the active path; Quantum HotStandby (140CHS11000) is the legacy in-place option. Safety needs M580 Safety (BMEP58CPROS3 or BMEH58S2040) on the SIL3-rated stack.

For machine controllers, throughput and I/O count drive selection: M221 for compact OEM machines (under 40 I/O), M238 for mid-size, M251 for distributed I/O via TM3, M258 for high-end with TM5 high-speed bus, M262 for motion and IIoT.

When cross-referencing legacy parts, always confirm firmware version and memory card content — Premium and Quantum CPUs of the same catalog number can differ in firmware enough to refuse a project download.

Buying from Rabwellplc

Stocked M340 and M580 CPUs, common BMX/BME I/O, M221/M218/M258 controllers, and Quantum 140 most-popular SKUs ship from US warehouse in 1–3 business days. Premium TSX, Quantum CPUs with rare firmware, and TM2/Twido legacy parts source in 5–15 business days. CPUs are powered up and verified bootable on Unity Pro / Control Expert / Concept before ship. Standard 12-month warranty. Project quotes for 10+ line BOMs return within 24 hours.

Frequently Asked Questions

Q: What is your typical lead time for Schneider Modicon parts?

A: Stocked M340, M580, M258, and the most popular Quantum 140 CPUs and I/O ship in 1–3 business days from US stock. Premium TSX, legacy Quantum HotStandby pairs, and Twido / TM2 long-tail SKUs source in 5–15 business days. We confirm ETA on the quote per line.

Q: Are these new Schneider OEM original or compatible parts?

A: All Modicon, M580/M340/M258/M218, Premium, and Quantum hardware we sell is original Schneider Electric manufactured product. We carry factory-new sealed and tested surplus depending on availability per SKU; condition is stated in the listing. We do not sell pattern, clone, or counterfeit Modicon controllers.

Q: What warranty do you offer on Modicon parts?

A: 12-month warranty from invoice on new and tested surplus, covering manufacturing defect and DOA. Extended 24-month coverage on request for project orders. RMA must be initiated within 30 days for return-for-credit.

Q: Can a project archived in Concept / ProWORX 32 still load on the Quantum CPUs you sell?

A: Yes if firmware revision is matched. Quantum 140CPU firmware levels are not always backward-compatible to older project archives. Send the project archive screenshot or the controller's V/PV/RL/SV identifiers (visible on the listing photos for our stock) and we will confirm match before ship.

Q: Do M340 and M580 share I/O modules?

A: Yes — both platforms use the X80 backplane and most BMX-prefixed I/O modules are usable on both BMXXBP (M340) and BMEXBP (M580) racks. CPUs are not interchangeable, and a few high-density modules are M580-only. We can confirm the cross-platform compatibility per BMX SKU on request.

Q: Do the controllers ship with memory cards or do those need to be ordered separately?

A: Quantum CPUs with onboard EXEC do not need separate memory cards; Premium CPUs typically need TSXMRPP/TSXMFPP cards which we stock; M340 uses BMXRMS008/0128MPF; M580 uses BMEXCAUSBA. Memory cards ship blank and must be programmed via Control Expert / Unity Pro.

Q: Can you provide cross-reference for legacy Premium / Quantum to M580 migration?

A: Yes. Send the existing CPU and I/O catalog list and we will return the M580 equivalent CPU plus X80 I/O equivalents and a notes sheet on application code conversion (Concept-to-Control Expert and Unity-to-Control Expert paths differ).

Q: Do you offer documentation and datasheet support?

A: Every listing links to the Schneider product datasheet. We also forward Unity Pro / EcoStruxure Control Expert version compatibility tables and the original Schneider product certificates on request.

If you have more questions or need a custom solution, reach out today—let’s keep your operations running smoothly!

Frequently Asked Questions

Why should I buy from Rabwell PLC instead of the original manufacturer?

We specialize in providing cost-effective alternatives and replacements for industrial automation parts, often at lower prices than OEMs while maintaining high quality and compatibility. Unlike manufacturers, we offer a vast in-stock inventory (over 10,000 items) for immediate shipment, reducing your downtime. Plus, our global warehouses and express shipping options ensure faster delivery worldwide. Many customers choose us for our preferential discounts, personalized quotes, and reliable refurbished options that perform just as well as new parts.

Are your products genuine and reliable?

Yes, all our products are sourced from reputable suppliers and undergo quality checks to ensure they meet industry standards. We focus on compatible replacements and refurbished items that are fully tested for functionality. With our high reputation in the industrial automation field, we back every purchase with warranties and support. If you're unsure about compatibility (e.g., for Allen-Bradley 1734 series modules), our experts can guide you.

What payment methods do you accept?

We offer secure and convenient payment options including Visa, Mastercard, AMEX, Discover, JCB, PayPal, and Diners Club. All transactions are encrypted to protect your information, giving you peace of mind during checkout.

How long does shipping take, and where do you ship to?

Most in-stock orders ship within 2-3 business days from our warehouses in the US, Canada, or Hong Kong. Delivery times vary by location: 3-7 days for express options via UPS, DHL, or FedEx. We ship worldwide to the United States, South America, Europe, Southeast Asia, the Middle East, Africa, and beyond. Check our Shipping Policy for details on duties, tracking, and any restrictions.

Do you offer discounts or bulk pricing?

Absolutely! We provide preferential discounts for bulk orders, repeat customers, or custom quotes. Simply use our “Request Quote” form on product pages or contact our team—we’ll tailor pricing to your needs and respond within 24 hours.

What is your return and warranty policy?

We stand behind our products with a satisfaction guarantee. Most items come with a 30-day return window and a warranty period (typically 1-2 years, depending on the product). If there’s an issue, contact us for easy returns or replacements. Full details are in our Policy section.

How can I get help with product selection or technical questions?

Our team of specialists is available for expert advice. Use the “Contact Us” page, call us, or request a quote—we can recommend alternatives, confirm compatibility, or even provide troubleshooting tips based on your specific setup.

Is shopping on your site secure?

Yes, we use advanced encryption and secure protocols to protect your data. We never store sensitive payment information, and all transactions comply with industry standards for safe online shopping.