Why the 140CPS11420C Belongs in Your Spares Strategy
Downtime on a Modicon Quantum rack rarely comes from the controller itself. It comes from the power supply feeding it. The Schneider Electric 140CPS11420C is the module that keeps that rack alive, and keeping one ready-to-ship is one of the cheapest insurance policies in industrial automation.
This is a modular power supply built for the Modicon Quantum series. It accepts 115 or 230 VAC input and delivers a regulated 5.1 VDC output at up to 11 A. For plants running legacy Quantum systems, that combination is the difference between a controlled shutdown and an unplanned outage.
What the Numbers Actually Cost You
Spec sheets are easy to skim. The cost implications are not. Here is how the key ratings translate into real money on the plant floor.
| Specification | Value |
|---|---|
| Input Voltage | 115/230 VAC |
| Output Voltage | 5.1 VDC |
| Output Current | 11 A |
| Input Current | 1300 mA at 115 V / 750 mA at 230 V |
| Inrush Current | 38 A at 115 V / 19 A at 230 V |
| Rated Power | 130 VA |
| Relay Contact | Normally closed, 220 VAC 6 A / 30 VDC 5 A |
| Operating Temperature | 0 to 60 °C |
| Dimensions (W x H x D) | 40 x 250 x 104 mm |
| Weight | 1.5 kg (3.3 lbs) |
Dual Input Voltage Keeps Sourcing Simple
The 140CPS11420C runs on either 115 or 230 VAC. In practice, that means one part number covers both North American and European panel standards. You stock one module instead of two, which cuts carrying cost and reduces the chance of pulling the wrong spare during a call-out.
11 A Output Headroom Protects the Rack
An 11 A output at 5.1 VDC gives the Quantum backplane meaningful headroom. Running a supply near its ceiling shortens its life and stresses every downstream module. Headroom is cheaper than replacing a rack.
Inrush Current and Your Breaker Budget
Startup draw reaches 38 A at 115 V and 19 A at 230 V. That is normal for this class of supply, but it matters when several units share a circuit. Plan breaker coordination around it, and you avoid nuisance trips that look like power supply failures but are not.
Relay Contact for Status and Control
The normally closed relay contact is rated 220 VAC at 6 A or 30 VDC at 5 A. It gives you a hard-wired path for status signalling or interlocking without adding external hardware. Fewer components means fewer failure points and lower installed cost.
Where This Module Earns Its Keep
Oil and gas control rooms. Quantum racks still run compressor stations, metering skids, and pipeline logic. A failed supply stops the whole rack. Holding a 140CPS11420C on the shelf turns a multi-day wait into a same-day swap.
Water and wastewater plants. These sites often run 24/7 with thin maintenance crews. The 0 to 60 °C operating range suits most control rooms, and the compact 40 mm width fits dense panels where space is already tight.
Legacy line upgrades. When a Quantum system stays in service because the process works, the power supply is the component most likely to age out first. Replacing it on a planned basis costs far less than an emergency call-out.
Installation Notes That Save Time
The module measures 40 x 250 x 104 mm and weighs 1.5 kg, so one technician can handle it without rigging. Mount it in the Quantum rack per the manufacturer’s documentation, confirm the input tap matches your supply voltage, and verify the relay contact wiring before energising. Keep airflow clear around the module, since the 0 to 60 °C rating assumes adequate ventilation.
Getting the Right Part, Fast
Before ordering, confirm your rack series, input voltage configuration, and whether you need the relay contact wired for status or interlock duty. If you are unsure, our team can help you match the module to your existing Quantum setup. Oil AutoTech supplies industrial automation spares for oil, gas, and process applications, with fast dispatch, worldwide. Contact Oil AutoTech today for pricing and availability.
Please verify current lifecycle status and availability with Oil AutoTech before ordering.
