140CPU43412AC

The Schneider Electric 140CPU43412AC is a robust CPU processor module designed for the Modicon Quantum automation platform, engineered to deliver reliable logic execution, distributed I/O capability, and flexible networking in demanding industrial environments. Featuring a 486‑series processor and 896 kB of RAM, this CPU supports both traditional Modbus Plus networking and multiple serial communications, making it ideal for legacy systems as well as mid‑to‑large scale automation projects requiring both performance and compatibility.

Technical Specifications

Parameter	Specification
Product Type	PLC CPU Processor Module
Platform	Modicon Quantum
Processor	80486 Core
Clock Speed	~66 MHz
Internal RAM	~896 kB
Communication Interfaces	1 × Modbus Plus, 2 × RS‑232
I/O Capacity	Up to 64 In / 64 Out (local)
Distributed I/O Support	500 In / 500 Out per Network
Max Remote Drops	31 Remote
Networks per System	Up to 3 Distributed
Watchdog Timer	~250 ms
Battery Type	Lithium, ~10‑year life
Bus Current Requirement	~1250 mA
Programming Support	Concept / ProWORX 32
Operating Temperature	0 °C to 60 °C
Storage Temperature	–40 °C to 85 °C
Mounting	Standard Quantum Backplane
Dimensions (H × W × D)	Approx. 250 × 110 × 50 mm
Weight	Approx. 0.50 kg (500 g)

This CPU meets the demands of distributed control architectures while maintaining compatibility with existing Modicon I/O and programming tools.

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Application Scenarios

The 140CPU43412AC is commonly found in industrial automation systems where stable processing and versatile communication are required:

Distributed and remote I/O architectures
Complex manufacturing and assembly lines
Process control in water, chemical, and energy sectors
Material handling systems
Legacy Modicon Quantum upgrades

Key Advantages

Balanced Performance: Combines substantial onboard RAM with a 486‑series CPU for dependable logic processing.
Versatile Communication: Built‑in Modbus Plus and multiple RS‑232 ports enable flexible integration with both legacy and modern devices.
Scalable I/O Support: Handles local and distributed I/O expansions with support for multiple networks and an extensive number of remote drops.
Industrial Durability: Designed for harsh environments with long battery life for retention of critical data.
Ease of Integration: Compatible with established Schneider programming environments (Concept / ProWORX 32), simplifying deployment and maintenance.

Technical FAQs

What processor does the 140CPU43412AC use?
It employs an 80486 core running at approximately 66 MHz.
How much memory is onboard?
It features approximately 896 kB of internal RAM.
Which communication interfaces are supported?
One Modbus Plus port and two RS‑232 serial ports provide flexible connectivity.
What I/O capacity can it support?
Up to 64 In / 64 Out locally and up to 500 In / 500 Out per distributed network.
How many remote drops can be connected?
Up to 31 remote drops across networks.
What are its physical dimensions?
Approximately 250 mm (H) × 110 mm (W) × 50 mm (D).
What is the weight?
Roughly 0.50 kg (500 g).
What temperature ranges does it support?
0 °C to 60 °C for operation, and –40 °C to 85 °C for storage.
What programming software is used?
It’s compatible with Concept and ProWORX 32.
Where is this CPU typically used?
In distributed control systems, legacy Quantum upgrades, and industrial automation installations requiring reliable PLC performance.