Schneider Electric 140CPS11420 Modicon Quantum Power Supply Module | Replacement, Equivalent & Selection Guide
The Schneider Electric 140CPS11420 is a standard AC power supply module for the Modicon Quantum PLC platform, delivering stable 3.3 V / 5 V / 24 VDC bus power to the backplane. Designed for demanding industrial environments, it accepts a wide-range 115/230 VAC input and provides reliable power for both local and remote I/O racks. At Konmask.com, we supply genuine, tested units with full traceability — ideal for MRO replacement, system expansion, and new builds.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 140CPS11420 |
| Brand / Manufacturer | Schneider Electric (Modicon) |
| Series | Modicon Quantum |
| Module Type | AC Power Supply Module |
| Input Voltage | 100–120 VAC / 200–240 VAC (auto-ranging) |
| Input Frequency | 47–63 Hz |
| Output — 3.3 VDC Bus | Up to 10 A |
| Output — 5 VDC Bus | Up to 8 A |
| Output — 24 VDC Bus | Up to 0.8 A |
| Total Output Power | ≈ 65 W |
| Backplane Slots Required | 1 slot (left-most position) |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | −40 °C to +85 °C |
| Relative Humidity | 5–95 % (non-condensing) |
| Protection Class | IP20 |
| Certifications | UL, CE, cUL |
| Weight | 580 g |
| Dimensions (H × W × D) | Quantum standard single-slot form factor |
Compatible Replacement & Equivalent Models
When the 140CPS11420 is unavailable or end-of-life, the following models are commonly evaluated as replacements. Always verify electrical ratings and firmware compatibility before substitution.
| Model | Brand | Input | Output Power | Notes |
|---|---|---|---|---|
| 140CPS11420 | Schneider Electric | 115/230 VAC | ~65 W | Original — recommended |
| 140CPS12420 | Schneider Electric | 115/230 VAC | ~100 W | Higher-power upgrade; same form factor |
| 140CPS21400 | Schneider Electric | 24 VDC | ~65 W | DC-input variant; different wiring |
| 140CPS22400 | Schneider Electric | 24 VDC | ~100 W | DC-input, higher power |
| 140CPS11420C | Schneider Electric | 115/230 VAC | ~65 W | Conformal-coated version for harsh environments |
⚠ Third-party or generic replacements are not recommended for Quantum backplanes due to proprietary bus communication protocols.
Why Choose the Original 140CPS11420
- Guaranteed bus compatibility — engineered specifically for Modicon Quantum backplane voltage rails and communication handshake.
- Proven MTBF — Schneider Electric’s industrial-grade components deliver long service life in 24/7 production environments.
- Firmware & diagnostics support — integrates with Unity Pro / EcoStruxure Control Expert for real-time power monitoring and fault diagnostics.
- Regulatory compliance — UL 508 / CE marked, meeting global panel-builder and machine-safety requirements.
- Warranty & support — backed by Schneider Electric’s global service network and spare-parts availability.
Typical Applications
- Oil & gas — DCS/PLC power distribution in remote terminal units (RTUs) and wellhead controllers
- Water & wastewater — SCADA-connected pump station and treatment plant automation
- Power generation & utilities — substation automation and turbine control panels
- Automotive manufacturing — body-shop and paint-line PLC racks requiring high uptime
- Food & beverage — hygienic-area control panels with IP20 enclosure integration
- Building automation — large-scale HVAC and BMS controller power infrastructure
System Compatibility
- Backplane: Modicon Quantum 6-, 10-, 16-slot local racks (140XBP0060x, 140XBP01000, 140XBP01600)
- CPUs: All Modicon Quantum CPU modules (140CPU311, 140CPU434, 140CPU651, etc.)
- Remote I/O: Compatible with Quantum RIO drops when used in local rack; remote drops use dedicated RIO power supplies
- Software: Unity Pro v2.x and above; EcoStruxure Control Expert v14.x and above
- Not compatible with: Modicon M340, M580, Premium, or Momentum platforms (different form factor and bus)
Selection Guide
Use the decision tree below to select the correct Quantum power supply:
-
Input power source?
- AC mains (115/230 V) → 140CPS114xx series
- DC bus (24 V) → 140CPS214xx series
-
Total I/O module current draw?
- ≤ 65 W → 140CPS11420 (this model)
- 65–100 W → 140CPS12420 (upgrade)
-
Harsh / corrosive environment?
- Yes → 140CPS11420C (conformal coat)
- No → standard 140CPS11420
- Redundant power required? → Add a second PSU in an adjacent slot with a 140CPS11420 + redundancy module 140CRP93200.
Quality Assurance & Sourcing
- ✅ Genuine OEM units — sourced directly from Schneider Electric authorized distributors and certified resellers.
- ✅ Pre-shipment testing — each unit is powered-on and output voltages verified before dispatch.
- ✅ Traceability — date code, serial number, and country of origin documented per shipment.
- ✅ Anti-counterfeit inspection — holographic labels, PCB markings, and firmware version cross-checked.
- ✅ Packaging — shipped in original or equivalent ESD-safe packaging with foam protection.
How to Order
- Click Add to Cart or Request a Quote above.
- For bulk orders (> 5 units) or urgent MRO needs, email [email protected] for priority pricing.
- Provide your PO number, delivery address, and required delivery date.
- Lead time: in-stock units ship within 1–3 business days; ex-stock orders within 5–10 business days.
- Export documentation (CO, packing list, commercial invoice) available on request.
Replacement & Compatibility FAQ
Q: Can I replace 140CPS11420 with 140CPS12420 without any configuration change?
A: Yes — the 140CPS12420 is a drop-in, higher-power replacement. No firmware or configuration change is required; it occupies the same slot.
Q: Is the 140CPS11420 compatible with Modicon M580 racks?
A: No. The M580 uses a different backplane bus and requires the BMXCPS series power supplies.
Q: Can two 140CPS11420 modules be used for redundancy?
A: Yes, with the addition of the 140CRP93200 redundancy module. Both PSUs must be identical models.
Q: What happens if the PSU fails during operation?
A: The CPU will detect a power fault and log a diagnostic event. In non-redundant configurations, the rack will de-energize. Redundant setups allow bumpless switchover.
Q: Do you supply refurbished units?
A: We supply new and factory-reconditioned units. Condition is clearly stated on the product listing and invoice.
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