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Help CenterSchneider Electric 140CPS11100 – Modicon Quantum AC Power Supply for Backplane Power
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The Schneider Electric 140CPS11100 is the dedicated AC power supply for Modicon Quantum racks, designed to deliver stable 5 VDC backplane power to CPUs and I/O modules. It’s a straightforward, robust option for maintaining legacy Quantum systems that still run critical lines and utilities. In many cases, it’s the easiest way to keep a proven Quantum installation reliable without changing the rest of the control architecture.
Designed for Modicon Quantum backplanes – Slides into the standard power supply slot and feeds the 5 VDC backplane bus for CPUs, communication, and I/O modules.
Wide-range AC input – Typically supports 85–264 VAC at 47–63 Hz, suitable for global panels and mixed facility power.
Regulated 5 VDC output to the rack – Provides stable backplane power for standard Quantum configurations; load budgeting remains simple and predictable.
Front-panel status indication – You might notice clear LEDs for quick checks during commissioning or troubleshooting.
Ruggedized for industrial cabinets – From my experience, Quantum power supplies handle electrical noise well when properly grounded and ventilated.
No user I/O or networking – Pure power module; no programming or firmware handling required.
| Brand / Model | Schneider Electric Modicon Quantum / 140CPS11100 |
| Power Requirements | AC input, typically 85–264 VAC, 47–63 Hz (commonly used at 115/230 VAC) |
| Output to Backplane | Regulated 5 VDC backplane supply for Quantum modules (size your rack power budget accordingly) |
| Operating Temperature | Typically 0 to 60 °C (panel-dependent) |
| Signal I/O Types | N/A (power supply only; no discrete/analog I/O) |
| Communication Interfaces | None (no network ports) |
| Installation Method | Rack-mounted on Modicon Quantum backplanes (e.g., 140XBP series), power-supply slot |
Application FieldsThe 140CPS11100 is typically used in legacy Modicon Quantum systems across:
Water and wastewater plants – keeping existing PLC racks running without redesigning MCCs or control cabinets.
Oil & gas and petrochemical – where downtime costs are high and a stable backplane supply matters more than new features.
Power generation and utilities – long-lifecycle assets that still rely on Quantum CPU and I/O architecture.
Discrete manufacturing and heavy industry – packaging lines, material handling, and mill environments with proven Quantum programs.
A maintenance customer recently mentioned that swapping to a new 140CPS11100 stabilized intermittent rack resets they were seeing when loads peaked—no PLC code changes needed, just proper power budgeting and a clean install.
Drop-in compatibility – Works with standard Quantum racks and modules; avoids requalification of the whole control system.
Lower risk, faster turnaround – In most cases, a direct replacement can be done during a planned stop with minimal wiring changes.
Stable supply for legacy assets – A practical way to extend system life while planning migrations at your own pace.
Predictable TCO – Simple hardware, no firmware management, and readily understood diagnostics.
Cabinet and mounting – Install in a properly grounded enclosure meeting industrial panel standards. Keep clearance for airflow; avoid heat sources.
Wiring – Use the specified AC feed with proper overcurrent protection and an earth ground. Keep AC and low-voltage/control wiring segregated to reduce noise.
Power budgeting – Verify total 5 V backplane load of CPU, comms, and I/O modules; leave margin for peak conditions.
Safety – De-energize the panel before inserting/removing the power supply. This module is not intended for hot-swap.
Routine care – Periodically vacuum dust from vents/slots and check terminal tightness. Review status LEDs during PM rounds.
Firmware – None required for the 140CPS11100; no updates to manage.
Compliance – CE and UL recognized; typically also CSA. RoHS compliant in most regions.
Warranty – Manufacturer’s limited warranty, commonly 18 months from shipment (policies can vary by region and program).
If you’re standardizing spares or planning a staged migration from Quantum, this unit tends to be the safest first step—simple to validate, easy to stock, and dependable in day-to-day operation.
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