Description
Schneider Electric 140CPU43412A Processor Module
The Schneider Electric 140CPU43412A also cataloged as the 140CPU43412A processor module operates as a dedicated hardware component for executing cyclic logic processing and distributed I/O control within Modicon Quantum automation platforms.
Configured for deterministic PLC scan execution in Modicon Quantum architectures,the Schneider Electric 140CPU43412A (140CPU43412A Processor Module) provides direct physical/electrical execution through backplane-based CPU scheduling and Modbus Plus communication handling.
SuffixBreakdown & Model Matrix
No validated suffix decomposition is defined for 140CPU43412A within the provided dataset. The identifier is treated as a single fixed ordering code.
Hardware Specifications
| Parameter |
Specification |
| ModelBrand |
Schneider Electric 140CPU43412A |
| Origin |
France |
| Weight |
0.85 kg |
| Dimensions |
Not specified |
| OperatingTemp |
0 to 60 degC |
| PowerConsumption |
1250 mA bus current requirement |
| CPU Clock |
66 MHz |
| Memory |
896 kB internal RAM |
| Communication Interfaces |
1 Modbus Plus, 2 Modbus RS232 |
| Instruction Execution Time |
0.1 to 0.5 ms (LL984) |
| Watchdog Timer |
250 ms |
| Battery |
Lithium 1.2 Ah, 10-year life |
PLC Backplane Execution & Deterministic Bus Scheduling
Backplane bus communication velocity and firmware execution model
The 140CPU43412A implements Modicon Quantum backplane arbitration for cyclic task execution, where CPU scan timing is governed by fixed interrupt scheduling and deterministic memory access cycles. Backplane communication latency is constrained by internal bus timing and distributed I/O refresh windows.
Firmware compatibility is aligned with Concept and ProWORX 32 programming environments, supporting legacy LL984 execution models without runtime translation layers. This ensures stable scan-cycle behavior during firmware flash or configuration download sequences, provided backplane synchronization is maintained.
Frequently Asked Questions
Q: Does the 140CPU43412A support hot-swap of CPU modules?
A: CPU hot-swap is not supported. Removal of the processor interrupts backplane cycle execution and halts distributed I/O refresh.
Q: What is the effect of watchdog timeout on system state?
A: A 250 ms watchdog timeout forces CPU reset or halt state depending on configured fault handling logic within Modicon Quantum system settings.
Q: Can Modbus Plus and RS232 operate simultaneously?
A: Yes. Modbus Plus operates on a dedicated network port while RS232 channels function independently for serial communication tasks.
Field Installation Guidelines
The module shall be installed into a powered-off Modicon Quantum rack. Backplane connector alignment must be verified before insertion to prevent pin misalignment. Shielded communication cables for Modbus Plus should maintain continuous grounding at cabinet entry points to minimize common-mode noise coupling. RS232 wiring shall be limited in length according to standard serial communication constraints and routed away from high-voltage conductors. Battery replacement must be performed with system power maintained when supported by configuration to preserve memory retention.
