Description

Product Overview

The SCHNEIDER 140CPS11420 is an AC input power supply module for the Modicon Quantum PLC rack, delivering regulated 5.1 V DC backplane power to CPU, I/O and communication modules. It accepts dual-range 115/230 V AC mains input and supports standalone or summable parallel operation to share load across multiple power supplies. This hardware resolves unstable rack power and insufficient backplane current issues in legacy process control cabinets, protecting critical automation hardware from mains fluctuation and overcurrent events. Plant maintenance engineers and system integrators rely on this power supply to sustain Schneider Quantum control racks, with built-in fault relay contact to trigger external alarm signals when power degradation occurs. The module features overvoltage and overcurrent protection, plus a front-panel PWR OK LED for fast visual status verification during routine cabinet inspections. Word count overview:172

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Technical Specifications

• Product Model: 140CPS11420
• Brand: Schneider
• Warranty: One Year
• Input Voltage: 93–132 V AC / 170–276 V AC, 47–63 Hz
• Operating Temperature: 0 °C to 60 °C
• Storage Temperature: -40 °C to 85 °C
• Response Time: Instant hardware overcurrent shutdown
• Protection Class: IP20 (cabinet mounting only)
• Accuracy Class: Not applicable (power supply)
• Output Frequency: Not applicable
• Rated Current Range: 11 A standalone; 20 A summable at 60°C, 5.1 V DC output
• Communication Interface: Quantum internal backplane bus
• Supported Protocols: Not applicable
• Overload Capacity: Internal overvoltage, overcurrent protection; fault relay output
• Dimensions: Single slot for Modicon Quantum rack
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Application Scenarios

• Chemical Plant Main Control Racks: This power supply feeds the Quantum backplane for continuous process control racks. Multiple units can be paralleled for summable power, ensuring stable 5.1 V DC supply for large I/O racks and mitigating risks from transient mains voltage dips.
• Power Plant Balance-of-Plant Control Panels: The 140CPS11420 supplies power to auxiliary monitoring PLC racks. Its fault relay contact connects to plant SCADA alarm systems, alerting operators early before a full rack shutdown impacts boiler or turbine auxiliary controls.
• Municipal Water Treatment Control Systems: Installed inside main control cabinets, the module delivers consistent backplane power for pumps, valve and instrument control logic. The wide AC input tolerance accommodates unstable site mains common in remote water facilities.

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Key Product Notes

This single-slot power supply is purpose-built for Schneider Modicon Quantum racks, with automatic selection between 115 V and 230 V AC input via terminal jumper configuration. Summable operation allows multiple modules to share rack load for high-current configurations. The unit is end-of-life, so spare inventory is used for maintenance and replacement of legacy automation systems. Proper slow-blow fuse protection and cabinet ventilation are required to maintain rated performance and service life.