In 1968, the industrial world changed forever when Dick Morley and his team at Bedford Associates invented the Modicon 084—the world’s first Programmable Logic Controller (PLC). Since then, Schneider Modicon has remained the undisputed pioneer of industrial automation.
Whether you are managing a high-output manufacturing line or a sprawling infrastructure project, the Modicon name represents the gold standard for ruggedness, logic execution, and long-term reliability. As a specialized supplier of industrial automation spare parts, we provide the authentic Schneider Modicon processors, I/O modules, and power supplies required to sustain your facility’s "prime mover" logic.
The Modicon ecosystem is vast, ranging from the legendary Quantum 140 series—the backbone of heavy industry for decades—to the modern Modicon M580 ePAC (Electronic Programmable Automation Controller). The M580 represents the next evolution in automation, featuring native Ethernet embedded right into the backplane for unparalleled data transparency and cybersecurity.
For mid-range applications, the Modicon M340 offers a compact yet powerful solution for stand-alone machines and distributed I/O. We specialize in the entire lifecycle of these systems, ensuring that your facility—whether involved in oil and gas, metallurgy, petrochemicals, or municipal water treatment—has access to the precise hardware needed to keep the wheels of industry turning.
In an era where "planned obsolescence" is all too common, we take a different approach. We understand that a plant-wide migration from legacy Modicon Momentum or Quantum hardware to the newer M580 platform is a massive undertaking involving significant capital expenditure and potential downtime.
We bridge this gap by leveraging a global network of world-renowned PLC and DCS maintenance service providers. This allows us to source, verify, and deliver hard-to-find legacy Schneider Modicon modules that the original manufacturer may no longer support. By providing these critical spares, we help you extend the ROI of your existing assets while you plan your modernization on your own terms.
From CNC machinery and automobile manufacturing to energy transmission and distribution, the reliability of your control system is paramount. By choosing us as your supplier, you are securing a partner who understands that "uptime" is the only metric that truly matters.
We provide the hardware solutions that protect your production targets and environmental protection systems, ensuring your facility remains as efficient and safe as the day its first logic rung was written.
1. What is the main difference between a traditional PLC and the Modicon M580 ePAC?
The "e" in ePAC stands for Ethernet. While older PLCs like the Schneider Modicon Quantum use a specialized backplane for communication, the M580 features a native Ethernet backplane. This allows for significantly higher data throughput, better diagnostic capabilities, and "on-the-fly" configuration changes without stopping the processor, making it the ideal choice for IIoT-ready facilities.
2. Can I use my existing Quantum 140 I/O modules with a newer M580 controller?
Yes. Schneider Electric designed the M580 to be "backward compatible" with certain Quantum I/O drops via the 140CRP31200 Ethernet Remote I/O head. This allows you to upgrade your "brain" (the CPU) to a modern ePAC while keeping your existing field wiring and I/O racks intact, drastically reducing the cost of modernization.
3. Our Modicon processor is showing a "HALT" or "ERR" LED. What should we do?
A HALT state typically indicates a serious system error or a watchdog timer timeout. This can be caused by a software logic loop, a hardware failure in the backplane, or an internal memory corruption. We recommend pulling the diagnostic buffer through EcoStruxure Control Expert (formerly Unity Pro). If the hardware is non-responsive, we can provide a verified Schneider Modicon replacement module for immediate dispatch.
4. How does Modbus communication relate to the Modicon brand?
Modicon literally invented Modbus in 1979. It was designed specifically for PLC communication and has since become the most widely used open protocol in industrial automation. Whether you are using serial (Modbus RTU) or Ethernet (Modbus TCP), your Schneider Modicon hardware is natively designed to communicate with almost any third-party drive, sensor, or HMI on the market.
5. How do we ensure our legacy Modicon Momentum or Quantum systems stay supported through 2026?
The key is a proactive spare parts strategy. As these systems move toward "End of Life," authentic parts become harder to find. By partnering with us, you gain access to a strategic global inventory of verified Schneider Modicon modules. We help you stockpile critical CPUs, power supplies, and communication adapters to ensure you aren't forced into an emergency upgrade during a component failure.