Schneider Electric 140CPU43412 Quantum PLC CPU Module

Product Description

The 140CPU43412 processor module is part of Schneider Electric’s Modicon Quantum series, developed for demanding automation systems that require consistent scan performance and flexible communication integration. Based on an Intel 80486 architecture, this CPU is designed for deterministic control and supports legacy programming platforms such as Concept and ProWORX32.

With a balanced combination of memory capacity, execution speed, and modular communication, this unit is well suited for medium to large installations where system uptime and predictable task execution are critical.

Compared to entry-level Quantum CPUs, the 140CPU43412 provides expanded memory resources and improved processing efficiency, making it appropriate for applications with higher logic density and communication demands.

Key Technical Specifications

Processor & Execution Performance

• CPU Type: Intel 80486-based controller
• Clock Frequency: 66 MHz
• Logic Execution Rate: 0.1–0.5 ms per 1K instructions (LL984)
• Watchdog Timer: 250 ms (system protection)

Memory Architecture

• Total Memory: up to 2 MB SRAM (expanded configuration)
• User RAM (typical allocation): approx. 896 kB
• Memory Retention: Battery-backed SRAM
• Battery Type: Lithium
• Battery Capacity: 1.2 Ah
• Estimated Battery Life: up to 10 years (typical industrial conditions)

System & I/O Integration

• Platform: Modicon Quantum
• I/O Support: Local, remote, and distributed architectures
• Compatible with Quantum racks and distributed I/O networks
• Designed for large-scale control strategies and multi-rack configurations

Communication Interfaces

• Built-in Ports:
  • 2 × Modbus serial communication ports
• Additional Features:
  • Integrated Modbus key switch interface (KYSW)
• Expandability:
  • Supports additional communication modules via Quantum backplane

Electrical & Environmental

• Bus Current Consumption: approx. 400 mA
• Power Consumption: approx. 5 W
• Operating Temperature Range: 0°C to 60°C
• Storage Temperature Range: -40°C to 85°C
• Weight: 0.64 kg

Application Scenarios

The 140CPU43412 is typically deployed in environments requiring stable and predictable PLC operation:

• Continuous process industries such as chemical and oil & gas
• Power generation and utility management systems
• Large manufacturing lines with distributed control requirements
• Infrastructure automation including water treatment and transport systems

FAQ

Q: Which programming software is compatible with this CPU? A: The module supports Concept and ProWORX32 programming environments, commonly used in legacy Quantum systems.

Q: Does this CPU include Ethernet connectivity? A: No integrated Ethernet port is available; Ethernet communication requires an additional module.

Q: How is memory retained during power loss? A: The SRAM is backed by a lithium battery, ensuring long-term data retention even when the system is powered down.

Q: What distinguishes this model from Unity-based Quantum CPUs? A: Unlike Unity processors, this model is designed for legacy platforms and programming tools, making it ideal for maintaining or upgrading existing systems rather than deploying new Unity-based architectures.