About Industrial Shields
Industrial Shields PLC Automation Controllers
Industrial Shields is a Spanish manufacturer of industrial-grade PLC (programmable logic controller) systems built on open-source Arduino platforms, bridging the gap between DIY maker electronics and mission-critical factory automation. Launched to democratize industrial automation by leveraging Arduino's massive developer ecosystem, Industrial Shields packages rugged, DIN-rail-mounted controllers with 24V DC digital I/O, analog inputs, Ethernet, and serial interfaces, all programmable in familiar Arduino IDE (C/C++), Python, or Node-RED environments rather than proprietary IEC 61131-3 ladder logic.
The M-Duino product line is Industrial Shields' flagship, offering Arduino-based controllers with configurable I/O counts: M-Duino 21+ features up to 21 I/Os (digital and analog mixed), Ethernet, USB, and 2G/3G cellular connectivity on select variants; M-Duino 58 R delivers up to 58 I/Os with Ethernet, RS-485, and expanded Modbus support; and the industrial-grade M-Duino PLC Arduino Industrial Ethernet reaches 58 mixed I/Os optimized for factory networking. The Ardbox series targets simpler applications with 16–20 I/O capacity in a compact DIN-rail enclosure. The newer ESP32 PLC 14 combines Wi-Fi, Ethernet, and RS-485 with 14 I/Os in an Arduino-compatible form factor.
Core hardware across the range employs 24V DC digital inputs/outputs (sinking/sourcing), analog inputs (0–10V, 4–20 mA), relay or solid-state transistor outputs, RS-232 and RS-485 serial communication, and Modbus RTU/TCP protocol support for integration with legacy industrial equipment and SCADA systems. All models are CE certified, feature DIN-rail mounting for standard control-cabinet installation, support daisy-chaining of multiple units via serial or Ethernet, and operate across industrial temperature ranges (-10°C to +50°C standard, extended variants available). Firmware updates are managed via USB or Ethernet OTA (over-the-air), and optional remote management modules enable cloud monitoring via MQTT or direct API calls.
Programming flexibility is a key differentiator: users can write control logic in Arduino IDE (leveraging millions of open-source libraries for sensor interfacing, data logging, and cloud connectivity), Python (for rapid prototyping and AI/ML integration), or visual block-based languages (Node-RED for non-programmers). This accessibility makes Industrial Shields ideal for small manufacturers, systems integrators, and service technicians who need to modify or repair automation logic without expensive consulting from proprietary PLC vendors, and enables rapid iteration for experimental production workflows.
Whether deploying a low-cost factory-floor data-collection node, upgrading a legacy relay-based machine controller to Modbus-networked automation, or building a custom IoT gateway that bridges analog sensors to cloud SCADA, Industrial Shields delivers industrial-grade reliability with open-source programmability and a fraction of the cost of Siemens S7, Allen-Bradley, or Omron equivalents. ChatMRO's industrial database surfaces the exact Industrial Shields model, I/O configuration, and communication interface for your automation need—simply describe your sensor/actuator count, required protocols (Modbus, RS-485, Ethernet), and programming preference, and our AI delivers matched controllers with real-time availability and pricing from verified automation distributors.
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Frequently asked questions
How does Industrial Shields' Arduino-based PLC differ from traditional Siemens, Allen-Bradley, or Omron PLC systems?
Industrial Shields uses open-source Arduino firmware and IDE, allowing programming in familiar C/C++, Python, or visual block languages instead of proprietary IEC 61131-3 ladder logic. This dramatically lowers the learning curve, enables reuse of millions of open-source sensor/actuator libraries, and eliminates expensive vendor lock-in for programming and support.
Can Industrial Shields controllers communicate with legacy Modbus RTU/TCP devices?
Yes—all M-Duino and Ardbox variants natively support Modbus RTU (over RS-485 serial) and Modbus TCP (over Ethernet), allowing immediate integration with 30+ years of installed industrial equipment without additional gateway hardware. Firmware libraries handle protocol parsing automatically.
What's the maximum I/O count, and can I expand beyond the controller's built-in I/Os?
M-Duino 58 R offers up to 58 mixed digital and analog I/Os built-in. For larger systems, multiple controllers can be daisy-chained via Modbus TCP over Ethernet or via RS-485, effectively supporting 100+ I/Os without additional modules.
Are Industrial Shields controllers suitable for hazardous or ATEX-classified environments?
Standard Industrial Shields controllers are not ATEX-certified; however, they can be housed in ATEX-compliant junction boxes and used as the logic element within a larger compliant system. For true hazardous-area-rated automation, consult with Industrial Shields integrators for certified enclosure and wiring approaches.
What programming languages are supported, and do I need specialized software licenses?
Arduino IDE (free, open-source), Python (free, via community-supported firmware), and Node-RED (free, visual block programming) are all supported. No proprietary software licenses are required—all development tools are freely available, though optional commercial support and training are available through Industrial Shields and its partners.