Schneider Electric 140CPS11420 AC Power Supply: Reliable 24V DC for Modicon Modules

Technical Specifications

Main Features and Advantages

The Schneider Electric 140CPS11420​ excels through its versatility, robustness, and system-focused design. Its standout feature is automatic input voltage sensing, which allows it to operate seamlessly on either 115V or 230V AC supplies without the need for manual jumpers, switches, or hardware reconfiguration. This plug-and-play capability drastically reduces installation time, eliminates configuration errors, and ensures the module can be deployed globally without requiring region-specific variants. The power supply delivers a stable and well-regulated 24V DC output, which is critical for the noise-sensitive electronics of the CPU and analog I/O modules, ensuring measurement accuracy and processing reliability.Built for demanding industrial duty, the Schneider Electric 140CPS11420​ incorporates comprehensive multi-stage protection. It features internal input fusing and inrush current limiting to prevent nuisance tripping of upstream circuit breakers during power-up. On the output side, it is equipped with overvoltage protection (OVP) and overcurrent protection (OCP) to safeguard connected modules in the event of a fault. Its high efficiency minimizes heat generation within the control cabinet, enhancing the longevity of all components. The module provides clear visual diagnostics via two LED indicators: one for AC power presence and one for healthy 24V DC output, enabling quick status checks. Furthermore, the Schneider Electric 140CPS11420​ is designed for redundancy. Two units can be installed in a rack with an optional redundancy interface module, allowing for hot-swap maintenance and zero-downtime operation in critical applications. This combination of intelligent features, protective circuitry, and high availability design makes it an indispensable and reliable power foundation for any Quantum-based control system.

Application Field

The Schneider Electric 140CPS11420​ AC power supply is a universal component found in virtually every industry that utilizes the Modicon Quantum platform for automation and control. In manufacturing and process industries, it provides the vital DC power for PLC racks controlling automotive assembly lines, food and beverage processing machinery, and chemical batch reactors. Its stable output ensures precise control of servos, variable frequency drives, and complex sequencing logic. For critical infrastructure, this module is fundamental. In water and wastewater treatment plants, the Schneider Electric 140CPS11420​ powers the Quantum systems that manage pump controls, chemical dosing, and filtration processes, where power continuity is essential for public health and environmental compliance.Within the oil and gas sector, from upstream extraction to midstream pipelines and downstream refining, the Schneider Electric 140CPS11420​ is deployed in both standard and redundant configurations. It powers safety instrumented system (SIS) controllers, fire and gas systems, and compressor control panels, where its reliability in harsh electrical environments is paramount. In the power generation industry, it is used in turbine control, burner management, and balance-of-plant systems for coal, gas, and hydroelectric plants. Here, the module’s ability to handle a wide input voltage range accommodates fluctuations in plant auxiliary power. The Schneider Electric 140CPS11420​ is also a workhorse in material handling and logistics, powering the PLCs that orchestrate conveyor systems, automated storage and retrieval systems (AS/RS), and shipping port cranes. Its role is consistent: to be the utterly dependable power conversion heart of the control rack, enabling the Quantum system to perform its tasks with unwavering reliability.