140CPU11303C

The Schneider Electric 140CPU11303C is an enhanced CPU processor module within the Modicon Quantum family, designed to deliver higher memory capacity and improved performance for more demanding industrial automation applications. Compared to entry-level Quantum CPUs, this model provides expanded processing resources, making it ideal for systems requiring more complex logic and greater data handling.

With integrated Modbus Plus and Modbus serial communication, the 140CPU11303C ensures flexible connectivity across legacy and distributed control architectures. Its proven reliability and long operational lifecycle make it a trusted solution for both system upgrades and maintenance of existing Quantum installations.

Technical Specifications

Parameter	Specification
Product Type	PLC CPU Processor Module
Platform	Modicon Quantum
Processor	80186
Clock Speed	20 MHz
Internal Memory	368 kB RAM
User Logic Capacity	Up to 16K Instructions
Communication Ports	1 × Modbus Plus, 1 × Modbus RS-232
Distributed I/O Capacity	Up to 500 Inputs / 500 Outputs
Remote I/O Drops	Up to 63
Execution Time	0.3 – 1.4 ms per 1K instructions
Watchdog Timer	250 ms
Battery Type	Lithium (Approx. 10-year life)
Bus Current Requirement	790 mA
Operating Temperature	0 to 60°C
Dimensions (H×W×D)	40 × 100 × 250 mm
Weight	Approx. 0.50 – 0.55 kg

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Application Scenarios

The 140CPU11303C is widely used in applications requiring enhanced control capability and stable communication:

Medium-scale manufacturing and assembly lines
Material handling and packaging systems
Water treatment and utility automation
Process control in chemical and energy industries
Legacy Quantum system expansion and modernization

Key Advantages

The 140CPU11303C delivers a significant upgrade in memory and processing capability compared to lower-tier CPUs, enabling more complex control strategies without compromising system stability.

Its dual communication interfaces provide flexibility for integrating both modern and legacy networks, reducing the need for additional modules. The long battery life ensures data retention and minimizes maintenance frequency, while its robust industrial design guarantees reliable operation in harsh environments.

Additionally, its compatibility with established programming platforms such as Concept and ProWORX 32 simplifies engineering and reduces training requirements.

Technical FAQs

What is the main function of the 140CPU11303C?
It acts as the central processor controlling logic and communication in a Quantum PLC system.
How much memory does this CPU provide?
It includes approximately 368 kB of internal RAM.
What communication ports are available?
It supports Modbus Plus and Modbus RS-232 communication.
What is the execution speed?
It processes 1K instructions in approximately 0.3 to 1.4 ms.
How many I/O points can it handle?
It supports up to 500 distributed I/O points.
What is the processor type?
It uses an 80186 processor running at 20 MHz.
Is it suitable for new projects?
It is mainly used in legacy or upgrade projects but remains highly reliable.
What software is used for programming?
Concept and ProWORX 32 are commonly used.
What is the watchdog timer value?
The watchdog timer is set to 250 ms.
Is this product still in production?
It has been discontinued but is still widely available and supported in aftermarket channels.