140CPU43412A Schneider Modicon Quantum CPU Module
Manufacturer: Schneider
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Part Number: 140CPU43412
Condition：New with Original Package
Product Type: Central Processing Units
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Schneider Electric 140CPU43412A Modicon Quantum CPU Processor Module
The Schneider Electric 140CPU43412A is a central processing unit module engineered for the Modicon Quantum automation platform. Powered by a 66 MHz 486 controller with an integrated mathematical coprocessor, it handles real-time control, I/O processing, and system diagnostics across complex industrial applications. The module offers 2 MB of internal SRAM, supports up to 896 KB of IEC program memory, and features built-in communication interfaces comprising two Modbus RS-232 serial ports and one Modbus Plus port.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 140CPU43412A |
| Brand | Schneider Electric |
| Product Series | Modicon Quantum |
| Product Type | PLC Central Processing Unit |
| Processor Type | 486 controller (66 MHz) |
| Mathematical Coprocessor | Integrated |
| Internal SRAM | 2 MB |
| Maximum IEC Program Memory | 896 KB |
| 984 Ladder Logic Capacity | 64 K words |
| Discrete Reference Capacity | 64 K |
| Register Capacity | 57 K words |
| Extended Register Capacity | 96 K words |
| Logic Execution Time | 0.1 to 0.5 ms/K instructions |
| Watchdog Timer | 250 ms (software adjustable) |
| Modbus Serial Ports | 2x RS-232 (9-pin D-sub connectors) |
| Modbus Plus Ports | 1x RS-485 |
| Local I/O Capacity | 64 input words / 64 output words |
| Maximum Local Racks | 2 (requires rack expander) |
| Maximum Remote I/O Drops | 31 |
| Maximum Distributed Networks | 3 |
| Option Module Interfaces | Up to 6 |
| Backup Battery | 3 V Lithium (1200 mAh, ~10-year shelf life) |
| Real-Time Clock Accuracy | ±8 seconds/day |
| Operating Temperature | 0 to +60 deg C |
| Storage Temperature | -40 to +85 deg C |
| Relative Humidity | Up to 95% (non-condensing) |
| Mounting Type | Modicon Quantum backplane rack |
| Net Weight | 0.91 kg (2.00 lbs) |
Processing and Memory Capacity
The module runs on a 66 MHz 486 processor with a dedicated mathematical coprocessor to execute logic routines with processing speeds between 0.1 and 0.5 ms per thousand instructions. Memory architecture includes 2 MB of total SRAM, which allocates up to 896 KB for IEC program code, 64 K words for 984 ladder logic, 57 K words of register data, and 96 K words of extended registers.
Verification: Ensure that application program code and data tables stay within the 896 KB IEC memory limit and 64 K discrete reference boundary.
Data retention during power loss is maintained by a 3 V lithium battery rated at 1200 mAh with an estimated shelf life of 10 years. An adjustable 250 ms watchdog timer monitors system execution to trigger safe shutdown sequences upon program fault detection.
Networking and I/O Architecture
Communication capabilities are built into the module housing via two Modbus RS-232 serial ports on 9-pin D-sub connectors and one Modbus Plus RS-485 port. Network communication allows data exchange with local operator stations, programming software (such as Concept or ProWORX32), and host supervisory equipment.
Verification: Confirm that Modbus Plus drop addresses are properly assigned and terminated along the RS-485 network trunk line.
The processor controls up to two local racks via rack expanders, providing a local channel capacity of 64 input words and 64 output words. For distributed systems, it supports up to 31 Remote I/O drops and up to 3 Distributed I/O networks with capacity for up to 6 option modules in the backplane.
Frequently Asked Questions
Q: What communications ports are natively available on the 140CPU43412A module? A: The processor features two RS-232 Modbus serial ports (via 9-pin D-sub connectors) and one Modbus Plus RS-485 port built into the unit.
Q: How is memory backed up when backplane power is removed? A: Internal SRAM data and configuration state are preserved by an onboard 3 V lithium battery rated at 1200 mAh.
Q: How many remote I/O drops can be managed by this processor? A: The module supports system architectures configured for up to 31 Remote I/O drops and up to 3 Distributed I/O networks.