Schneider Electric 140CPU21304C High‑Performance Modicon Quantum PLC CPU Module with 768 KB RAM and Dual Communication Ports
Schneider Electric 140CPU21304C High‑Performance Modicon Quantum PLC CPU Module with 768 KB RAM and Dual Communication Ports
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Brand:Schneider PLC Item No.:Schneider 140CPU21304C Product Origin: USA Product Dimensions:45 × 110 × 250 mm Product Weight:0.60 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Schneider Electric 140CPU21304C is a powerful processor module from the Modicon Quantum PLC family, engineered to tackle mid‑complexity industrial control tasks with reliability and flexibility. Designed for robust performance in demanding automation environments, this CPU brings expanded memory, fast logic execution, and versatile communications to distributed control systems. It’s ideal for legacy and retrofit installations where high uptime, stable operation, and broad I/O support are essential.
Up to 3 Networks, 500 In/500 Out Words per Network
Watchdog Timer
250 ms (Software Adjustable)
Battery Backup
3 V Lithium, ~10‑year Life
Operating Temperature
0 °C to 60 °C
Mounting
Standard Rack Mounted
Dimensions (H×W×D)
Approx. 45 × 110 × 250 mm (est.)
Weight
Approx. 0.50 – 0.60 kg
This CPU module supports standard Quantum backplanes and delivers reliable control and communication performance for industrial automation.
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Application Scenarios
The 140CPU21304C excels in industrial automation and control scenarios where robust execution and flexible I/O connectivity are critical:
Manufacturing lines and material handling systems
Water and wastewater treatment control
Chemical and petrochemical process automation
Packaging and assembly machinery
Infrastructure and utility systems requiring distributed control
Key Advantages
The 140CPU21304C stands out thanks to its significant memory capacity and communication versatility. The 768 KB RAM delivers ample storage for complex logic and data structures, approaching higher‑end CPU capabilities within a compact Quantum platform module. This effectively reduces the need for external expansion and simplifies system architecture.
Dual communication ports—including Modbus Serial and Modbus Plus—enable seamless integration with both legacy and networked devices, enhancing connectivity with HMIs, drives, SCADA systems, and other PLCs. Its broad I/O support, including local, remote, and distributed configurations, provides the flexibility required for scalable automation solutions.
The conformal coating and industrial design ensure long‑term durability even in harsh conditions, while built‑in diagnostics and watchdog functions help maintain system stability and reduce unplanned downtime.
Technical FAQs
What is the memory capacity of the 140CPU21304C?
It features 768 KB of internal RAM for program and data storage.
Which communication protocols are supported?
It supports Modbus RS‑232 and Modbus Plus RS‑485 protocols.
How fast is the logic execution?
Typical logic solve times range from 0.3 ms/k to 1.4 ms/k.
Can it handle remote and distributed I/O?
Yes, it supports up to 31 remote drops and multiple distributed networks.
What kind of battery backup does it use?
A 3 V lithium battery provides long‑term retention of memory during power loss.
What operating environments is it suitable for?
It is designed for industrial environments with temperatures between 0 °C and 60 °C.
Is this module still in production?
It is a legacy Modicon Quantum model but remains widely available through aftermarket and refurbished markets.
What software can be used to program it?
It is typically programmed using Schneider Electric tools such as Concept or ProWORX.
How does it integrate into a Quantum rack?
It installs in slot 0 of a Quantum backplane and manages system logic and communications.
What is the key benefit of this CPU?
Its balanced combination of memory size, communications, and I/O flexibility makes it ideal for mid‑complexity industrial automation systems.
