SCHNEIDER 140CPU43412 Quantum CPU Controller – Modicon Quantum Series
When a Quantum CPU module fails mid-shift, the consequences are immediate and measurable: production lines halt, SCADA systems lose their master controller, and every downstream I/O rack goes dark. In process-critical environments — water treatment, oil & gas pipelines, power distribution — an unplanned CPU outage can trigger safety shutdowns that take hours to recover from. The 140CPU43412 is the component that keeps this from happening. It is not a peripheral; it is the decision-making core of the entire Quantum rack system.
Within the Modicon Quantum family, the 140CPU43412 occupies the mid-to-high performance tier — positioned above entry-level 140CPU31110 units and below the hot-standby 140CPU67160 redundancy platforms. It supports up to 64K words of user memory and handles both local and remote I/O via the Quantum backplane, making it the preferred choice for standalone process controllers and distributed control architectures across manufacturing and infrastructure projects worldwide.
Technical Specifications
Electrical
- Supply Voltage: 5 VDC (supplied via backplane)
- Power Consumption: ≤ 3.5 W (backplane draw)
- Communication Ports: Modbus Plus (MB+) × 2, RS-232 Modbus × 1
- Ethernet: Not onboard (requires 140NOE module for Ethernet)
Processing & Memory
- User Memory: 64K words (expandable via memory card)
- Executive Memory: Flash EEPROM
- Data Memory: Battery-backed RAM
- Scan Time: Typically 1–10 ms per 1K instructions (application-dependent)
- Programming Languages: Ladder Diagram (LD), Function Block Diagram (FBD), Instruction List (IL) — IEC 61131-3 compliant
Mechanical
- Form Factor: Single-slot Quantum backplane module
- Weight: 580 g
- Connector: DIN rail-mounted via Quantum rack (140XBP series)
- Slot Position: Slot 1 (mandatory CPU slot)
Environmental
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: −40 °C to +85 °C
- Relative Humidity: 5% to 95% non-condensing
- Vibration Resistance: IEC 60068-2-6
- Shock Resistance: IEC 60068-2-27
Certifications
- CE Marking (EMC Directive 2014/30/EU)
- UL Listed (UL 508)
- CSA Certified
- IEC 61131-2 (Programmable Controllers — Equipment Requirements)
All specifications conform to IEC 61131-2 and are verified against Schneider Electric reference documentation 840USE10100.
Key Features & Benefits
- Dual Modbus Plus Ports — Enables peer-to-peer communication between up to 32 Quantum nodes on a single MB+ network without an additional bridge module, reducing BOM cost by eliminating one 140NOM21100 per node.
- 64K Word User Memory — Supports complex ladder programs with up to 64,000 words of application data, sufficient for most mid-scale process control applications without requiring external memory expansion.
- Battery-Backed RAM Retention — Program and data memory are preserved through power loss events; typical battery life exceeds 3 years under normal operating conditions, reducing unplanned maintenance cycles.
- IEC 61131-3 Multi-Language Programming — Fully compatible with Unity Pro and Concept software, allowing engineers to reuse existing function blocks across Quantum and Premium platforms without rewriting logic.
- Hot-Swap Compatible Rack Architecture — The Quantum backplane supports module replacement without full rack power-down in qualified configurations, reducing mean time to repair (MTTR) in live production environments.
- Wide Thermal Operating Range (0–60 °C) — Meets IEC 60068-2-1/2 environmental testing, qualifying the module for installation in non-climate-controlled electrical cabinets in foundry, cement, and outdoor substation applications.
Industry & Equipment Applications
- Oil & Gas — Pipeline SCADA: Acts as the master controller for remote terminal units (RTUs) monitoring pressure, flow, and valve position across pipeline segments; communicates upstream to DCS via Modbus Plus gateway.
- Water & Wastewater — Pump Station Control: Manages variable-speed drive (VSD) sequencing, level sensor polling, and alarm relay logic for municipal lift stations requiring 24/7 unattended operation.
- Power Generation — Auxiliary Control Panels: Controls cooling water pumps, lube oil systems, and generator excitation auxiliaries in thermal and hydroelectric power plants where deterministic scan times are mandatory.
- Automotive Manufacturing — Transfer Line Control: Coordinates multi-station transfer lines with up to 2,048 discrete I/O points via remote Quantum I/O drops, synchronizing part indexing and tooling actuation.
- Cement & Mining — Kiln Drive Control: Handles high-inertia drive sequencing and process interlocks in dusty, high-vibration environments where the module’s IEC 60068-2-6 vibration rating is a qualification requirement.
- Building Automation — Central Utility Plants: Serves as the primary controller for chiller plant sequencing, cooling tower fan staging, and BMS integration via Modbus serial in large commercial facilities.
System Integration & Compatible Parts
Required Upstream Components:
- Quantum Rack: 140XBP01600 (16-slot), 140XBP01000 (10-slot), 140XBP00600 (6-slot)
- Power Supply: 140CPS11420 (115/230 VAC) or 140CPS12420 (24 VDC)
- Programming Cable: TSXPCX3030 (USB-to-Modbus) or 990NAD23100 (MB+ tap)
Compatible Downstream I/O Modules:
- Digital Input: 140DAI54000, 140DDI35300
- Digital Output: 140DAO84000, 140DDO35300
- Analog Input: 140ACI04000, 140AII33000
- Communication: 140NOE77100 (Ethernet), 140NOM21100 (Modbus Plus bridge)
Functional Equivalents & Substitution Notes:
- 140CPU43412A — Revised hardware revision with identical firmware compatibility; direct drop-in replacement with no program changes required.
- 140CPU53414 — Higher-tier CPU with onboard Ethernet; suitable upgrade path when Ethernet connectivity is added to the architecture.
- 140CPU31110 — Lower-tier alternative; supports only 32K words of user memory — verify program size before substituting.
Our Quality Assurance Process
Every 140CPU43412 unit shipped from Konmask.com passes a documented 4-step inspection protocol:
- Visual & Physical Inspection: Housing integrity, connector pin condition, label legibility, and absence of corrosion or mechanical damage are verified against Schneider Electric’s OEM acceptance criteria.
- Firmware & Revision Verification: Hardware revision code and firmware version are confirmed and documented. Units with unknown or mismatched revisions are quarantined pending further investigation.
- Functional Power-On Test: Module is seated in a Quantum test rack and powered on. Self-diagnostic LEDs (RUN, ERR, MBP) are observed for normal startup sequence per the 140CPU43412 user manual.
- Packaging & ESD Protection: Units are packed in anti-static bags with foam cushioning and labeled with inspection date, technician ID, and test result before dispatch.
Available Documentation: Inspection report, firmware revision record, ESD packaging certificate, and — where available — original Schneider Electric test certificate of conformity.
How to Order
- Submit Your Inquiry: Email support@konmask.com or use the contact form on this page. Include your required quantity, delivery timeline, and destination country.
- Receive Quotation: Our technical team will confirm stock availability, lead time, and pricing within 24 hours on business days.
- Confirm & Ship: Upon order confirmation, we arrange export documentation, ESD-safe packaging, and dispatch via your preferred freight method.
Why Choose Konmask.com?
- Specialist Focus: We source and supply Schneider Electric Modicon Quantum components exclusively for industrial automation applications — not a generalist electronics distributor.
- Documented Inspection: Every unit is inspected and documented before shipment. You receive a traceable inspection record with your order.
- Technical Pre-Sales Support: Our team can advise on firmware compatibility, rack configuration, and substitution options before you commit to a purchase.
- Export Experience: We handle export documentation for shipments to Southeast Asia, the Middle East, and Europe, including commercial invoices and packing lists aligned with customs requirements.
- Responsive Communication: 24-hour response commitment on all inquiries received during business hours (UTC+8).
Frequently Asked Questions
Q: Is the SCHNEIDER 140CPU43412 compatible with Unity Pro programming software?
A: Yes. The 140CPU43412 is fully supported by Schneider Electric’s Unity Pro (all versions) and the legacy Concept software. You can import existing Concept projects and convert them to Unity Pro format without hardware changes.
Q: What is the difference between the 140CPU43412 and the 140CPU43412A, and can I use them interchangeably?
A: The 140CPU43412A is a later hardware revision of the same product with identical functional specifications and firmware compatibility. In most applications, they are direct drop-in replacements. We recommend confirming the revision with your system integrator if your application uses revision-specific firmware features.
Q: Can I source a replacement SCHNEIDER 140CPU43412 CPU module for an existing Quantum rack without reprogramming?
A: Yes, provided the replacement unit carries the same or compatible firmware revision. The application program is stored in battery-backed RAM and can be reloaded from a backup file via Unity Pro or Concept. We recommend maintaining an up-to-date program backup before any CPU replacement.
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Contact: support@konmask.com | +0086 19859288691
