140CPU42402 140CPU42402C

The Schneider Electric 140CPU42402 is a robust CPU processor module from the Modicon Quantum series, engineered to support high‑performance industrial automation and control tasks. Built for environments that require reliable execution and flexible communication, this CPU delivers a balance of memory, networking capabilities, and expandability suited for distributed systems and legacy installations. Its design ensures durability, scalability, and broad compatibility with Quantum I/O components.

Technical Specifications

Parameter	Specification
Product Type	PLC CPU Processor Module
Platform	Modicon Quantum
Processing Type	2M CPU
User Logic Capacity	64K Words
Discrete Memory	64K Words
Register Capacity	57K
Extended Register Capacity	96K
Communication Interfaces	1 × Modbus Serial (RS‑232), 2 × Modbus Plus Network Ports
Maximum Remote Drops	Up to 31
Networks per System	Up to 3 Distributed I/O Networks
Max I/O Words per Network	500 In / 500 Out
I/O Words per Node	30 In / 30 Out
Battery Backup	3V Lithium
Watchdog Timer	250 ms (software adjustable)
Operating Temperature	0 °C to 60 °C
Storage Temperature	-40 °C to 85 °C
Power Consumption	Approx. 5W
Bus Current Required	Approx. 400 mA
Dimensions (H×W×D)	102 × 254 × 51 mm (4.0″ × 10.0″ × 2.0″)
Weight	Approx. 0.6 kg (1 lb 4 oz)

This configuration makes the 140CPU42402 an effective processor for applications with distributed I/O, networked systems, and moderate logic sizes.

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Application Scenarios

The 140CPU42402 is widely used across industrial sectors requiring stable and expandable PLC control:

Manufacturing automation and material handling
Process control in energy, chemical, and water treatment systems
Distributed I/O architectures in large facilities
Legacy system upgrades where Modbus‑based networking is present
Infrastructure and utilities requiring reliable control performance

Key Advantages

The 140CPU42402 distinguishes itself with reliable processing capacity and a communication architecture that supports multiple distributed I/O networks. Its support for up to 31 remote drops and multiple network ports provides flexibility for complex automation layouts.

Despite being part of a legacy platform, this CPU remains valuable in environments where compatibility with existing infrastructure and proven reliability are priorities. The 3 V lithium battery helps preserve critical data in power interruptions, while its adjustable watchdog timer enhances operational safety and consistency.

Technical FAQs

What memory capacities does the 140CPU42402 provide?
It offers 64K words of user logic and discrete memory, plus 57K register and 96K extended register capacity.
Which communication interfaces are available?
One Modbus RS‑232 serial port and two Modbus Plus network ports are provided.
What is the maximum number of distributed networks?
Up to 3 networks per system are supported.
How many remote drops can be connected?
Up to 31 remote drops are supported.
What backup power does the CPU use?
A 3 V lithium battery maintains data integrity during power loss.
What are the physical dimensions?
102 mm (H) × 254 mm (W) × 51 mm (D).
What is the operating temperature range?
0 °C to 60 °C; storage range –40 °C to 85 °C.
Is it suitable for modern automation systems?
It is ideal for legacy or hybrid systems requiring Modbus connectivity and distributed control.
How does the battery affect uptime?
The battery preserves memory and system states in the event of power interruptions.
What software is typically used with this CPU?
Existing Schneider tools such as Concept are commonly used for programming and diagnostics.