Description
The Schneider Electric 140CPU43412A is a high-performance central processing unit (CPU) module belonging to the Modicon Quantum automation platform. It is designed to manage complex, large-scale industrial control tasks that require rapid instruction execution and robust communication. Powered by an 80486 processor, it provides a stable environment for discrete and analog process control in industries such as water treatment, oil and gas, and heavy manufacturing.
Product Parameters (Datasheet)
The following specifications define the core hardware and operational limits of the 140CPU43412A:
SCHNEIDER 140CPU43412A
| Feature | Specification |
| Processor Type | Intel 80486 (486 Controller) |
| Clock Frequency | 66 MHz |
| Mathematical Coprocessor | Integrated |
| Internal RAM | 896 kB (Standard) / up to 1056 kB (Model dependent) |
| Instruction Execution Time | 0.1 to 0.5 ms per 1k LL984 instructions |
| Communication Ports | 1 x Modbus Plus, 2 x Modbus RS-232 |
| Bus Current Requirement | 1250 mA |
| Power Dissipation | 4.5 W |
| Battery Type | 3V Lithium (1.2 Ah) |
| Battery Life | 10 years (Typical) |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Weight | 0.85 kg (1.87 lbs) |
Technical Features & Functional Description
- Deterministic Control: The module provides precise execution of logic cycles, which is critical for time-sensitive automation tasks.
- Dual-Software Support: It is natively compatible with Concept and ProWORX 32 programming software. Additionally, units with a Product Version (PV) of 04 or higher can be upgraded to Unity Pro (now Control Expert) through a firmware migration.
- Network Expandability: The 140CPU43412A can support up to six optional network modules (Ethernet, Profibus, or additional Modbus Plus) to interface with distributed I/O and SCADA systems.
- Integrated Security: It features a physical Key Switch on the front panel to protect against unauthorized memory changes or accidental program stops while the process is active.
- Memory Management: The 896 kB of RAM is partitioned to store user logic, configuration data, and system diagnostics, with the lithium battery ensuring data retention during power outages.
Country of Origin
- Primary Origin: France (FR).
Installation & Maintenance Guidelines
- Chassis Mounting: The module is designed for the Modicon Quantum backplane. It is secured by hanging the module onto the top rail of the backplane and fastening the bottom screws to ensure mechanical and electrical stability.
- Addressing: Node addresses for Modbus Plus and Modbus ports are set via dual rotary switches located on the rear or side of the module before insertion.
- Battery Maintenance: To prevent memory loss, replace the lithium battery while the system is powered on if the “BAT LOW” LED is active.
- Cabling: Standard 9-pin serial cables are used for Modbus RS-232 connections, typically for local programming or HMI interfacing.
Recommended Related Schneider (Modicon) Products
To complete or expand a Quantum control system, the following related modules are frequently utilized:
- 140CPS11420: A standard 115/230 V AC Power Supply module.
- 140CHS11000: Hot Standby module for high-availability redundant architectures.
- 140NOE77101: Ethernet TCP/IP communication module for plant-wide networking.
- 140DDI35300: 32-channel 24 V DC Discrete Input module.
- 140DAI75300: 32-channel 115 V AC Discrete Input module.
- 140ACI03000: 8-channel Analog Input module (0-20mA / 4-20mA).
- 140XBP01600: 16-slot backplane for housing the CPU and associated I/O.
