Schneider Electric 140CPS12400 | 115‑230V AC 5.1VDC Backplane Power Unit Spec Sheet Data

Description

Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.

Product Introduction

When critical process racks suffer single‑point power failure, unplanned downtime cascades across whole plant zones. This 140CPS12400 mounts to the Quantum backplane, feeding stable logic power to CPU, I/O, and communication cards within the chassis.

Paired with an identical unit, it runs in redundant summable mode so one unit can carry full rack load if its partner fails. Heat buildup inside enclosed cabinets accelerates internal component aging (‑though your mileage may vary depending on cabinet air flow and annual maintenance cycles).

140CPS12400

140CPS12400

140CPS12400

140CPS12400

Key Technical Specifications

Field Application & Technical Pitfalls (The Engineer’s Guide)

Critical Industrial Scenarios

1. Continuous‑run chemical processing PLC racks, where any full‑rack shutdown triggers costly safety interlock sequences.
2. Municipal water and wastewater control houses, running redundant Quantum racks for pump station and valve bank automation.
3. Paper mill machine control cabinets, where brief power glitches cause web breaks and multi‑hour production reset cycles.

Technical Pitfalls (Bold Warnings)

• ⚠️ Mismatched redundant PSU pairing: Always deploy two identical 140CPS12400 units. Mixing different CPS model numbers breaks load sharing; one supply will absorb nearly all rack current and overheat prematurely.
• ⚠️ Backplane current oversubscription: Even with redundant power, total rack I/O and CPU draw cannot exceed 8 A rating. Redundancy provides fault tolerance, it does not raise total available backplane amperage.
• ⚠️ Connector seating oversight: The second terminal block from the left carries AC mains input. Partial insertion creates high‑resistance joints that heat under load without tripping internal supply protection.

A real‑world field anecdote: A process facility installed two surplus power supplies for their Quantum hot‑standby rack. Staff paired the 140CPS12400 with an older 140CPS11420 to cut spare‑part expense. The system powered up and showed solid green PWR‑OK lights on both modules. After seven weeks of heavy I/O cycling, the 140CPS12400 overheated and failed. The mismatched hardware forced it to carry 92 % of total rack load, a stress no visual alarm flagged before component burnout.

Quality Control (QC) SOP & Transparency

1. Inbound Verification: Match unit label part number, serial number and OEM packing documentation. Inspect edge connector gold plating for wear, abrasion or re‑pinning marks. Check casing for sanding traces that signal re‑marked counterfeit assemblies.
2. Live Rig Testing: Insert module inside a populated Modicon Quantum test rack. Apply both 120 V AC and 230 V AC nominal input voltages, confirm green PWR‑OK LED activates consistently across both ranges. Validate backplane handshake to CPU.
3. Parameter Testing: Perform insulation resistance check on AC input terminals. Run resistive load testing up to rated output amperage; monitor output voltage drift and temperature rise across the full load range. Reject units showing excessive voltage sag.
4. Final QA & Packaging: Wipe module housing with static‑safe cloth. Seal unit inside conductive anti‑static bag. Apply internal QC‑passed sticker with test date and inspector ID, pack within rigid shock‑absorbent shipping carton.

Frequently Asked Questions (FAQ)

Can I hot‑swap this power supply inside a running redundant Quantum rack? Yes, strictly when configured with a second identical working power supply. Remove AC input power to the unit being replaced before extraction. Never pull the module while mains voltage remains connected.

Will this unit fit any Modicon Quantum rack chassis? Well, technically it fits standard Quantum backplanes. Some special compact rack variants restrict PSU slot placement. Cross‑check chassis hardware manual before purchase.

What warranty terms apply to this discontinued new‑surplus power supply? Twelve‑month standard warranty coverage applies. Damage stemming from mismatched redundant pairing, over‑current rack loading, cabinet over‑temperature, or wiring errors sits outside warranty scope.

How do I tell genuine OEM surplus apart from refurbished rebuilt copies? Genuine new‑surplus units show crisp unaltered serial labels, scratch‑free edge connector pins, and no residue from re‑soldering on internal circuit boards. Refurbished examples often bear faint discoloration around input connector solder points.

Does redundancy automatically give me higher total rack output current? No. Redundant summable mode provides fault tolerance. Maximum safe backplane draw stays capped at 8 A. If your total rack current exceeds that threshold you need a higher‑capacity power‑supply variant.

What fuse specification should I use on the AC input side? Follow OEM guidance for a 2 A slow‑blow fuse. Fast‑acting fuse types risk nuisance tripping from the unit’s high inrush current on power‑on.

What sourcing risk comes with this end‑of‑life part? Original manufacturing has stopped. No new factory production runs will happen. Once existing surplus stock depletes, procurement options narrow to previously reconditioned used hardware.