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.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 140CPS11420 |
| Platform | Modicon Quantum PLC |
| Input Voltage | 93–132 VAC (115V nominal) / 170–276 VAC (230V nominal) |
| Input Frequency | 47 Hz to 63 Hz |
| Rated VA | 130 VA |
| Input Current | 1.3 A @115 VAC, 0.75 A @230 VAC |
| Output Voltage | 5.1 V DC |
| Output Current | 11 A (standalone, 60°C); 20 A (summable parallel, 60°C) |
| Protection | Internal overvoltage, overload protection |
| Alarm Contact | 1 Normally Closed, 6 A @220 VAC fault relay output |
| Status Indicator | Green PWR OK LED |
| Recommended Fuse | 2 A slow-blow |
| Operating Temperature | 0°C to +60°C rated |
| Storage Temperature | -40°C to +85°C |
| Weight | 0.65 kg |
| Mounting | Standard Modicon Quantum rack slot |
| Status | End-of-life original production, maintained as spare inventory |
Product Introduction
The Schneider Electric 140CPS11420 is a dedicated backplane power supply for the Modicon Quantum PLC platform. It converts universal AC line voltage into stable 5.1 VDC power to feed the rack backplane for CPU, discrete I/O, analog modules and communication adapters.
Its standout feature is summable parallel capability: multiple 140CPS11420 units can be installed in one rack to share total load and boost available backplane current. It provides a hardwired fault alarm relay for remote monitoring, and a front-panel green LED to confirm healthy output. This legacy Quantum power supply is widely stocked for plant maintenance, since original manufacturing has ceased. It is not a direct drop-in replacement for newer Modicon X80 racks.
140CPS11420
140CPS11420
140CPS11420
Application Scenarios & Field Experience
Modicon Quantum systems are still widely deployed in industrial sites that have delayed full migration.
- Water & wastewater treatment: Pump control, valve sequencing, chemical dosing PLC racks.
- Oil & gas upstream and midstream: Compressor control, pipeline emergency shutdown logic.
- Manufacturing and material handling: Conveyor systems, packaging lines, batch control.
- Power auxiliary systems: Balance of plant auxiliary control and interlock racks.
Field note: A wastewater treatment plant experienced a 140CPS11420 failure on its main process rack, dropping all analog and discrete I/O. Operators transferred to manual local control. After fitting a tested replacement unit, the technician verified PWR OK status, checked backplane voltage stability, and confirmed all CPU and I/O modules booted correctly without program loss. Process automation was restored quickly.
Standard Operating Procedure (SOP) for Quality Control
- Visual & Part Verification: Confirm marking 140CPS11420, inspect casing, terminal block, PCB for burn marks, swelling capacitors or connector damage.
- Input/Output Bench Test: Apply 115 VAC and 230 VAC separately, verify steady 5.1 VDC output under rated load.
- Alarm Contact Test: Trigger simulated overload condition, confirm fault relay changes state correctly.
- Summable Compatibility Check: Verify matching hardware revision if the site uses parallel power supply configuration.
- Load Cycling Test: Run extended soak test under full rated current to validate thermal stability.
- ESD Packaging: Static shielding bag, fitted foam insert, rigid carton with ESD warning labels.
Frequently Asked Questions (FAQ)
Q1: What is summable operation? A: Summable means multiple 140CPS11420 supplies can share the rack load in parallel. Two working units together deliver up to 20 A total backplane current.
Q2: Can this module be hot-swapped while the rack is powered? A: Hot swap is supported in Quantum racks, but removing the active supply will drop power to the entire rack if no other summable supply is online. Always lock out critical interlocks before service.
Q3: Is this unit compatible with Modicon X80 PLC racks? A: No. It is built exclusively for Modicon Quantum racks. The recommended migration platform is Modicon X80 with BMXCPS4002 power supply.
Q4: What warranty is provided? A: Standard 12-month warranty. Warranty excludes damage from incorrect AC input voltage, overloading, short circuit on backplane, surge and poor cabinet ventilation.
Q5: Can I mix different Quantum power supply models in the same summable rack? A: Mixing different CPS model codes is not recommended. Mismatched units may cause uneven current sharing, premature failure and backplane voltage drift.
