Arduino Opta RS485 Micro PLC 12-24VDC (Ethernet & Modbus RTU) | Najoom Al Falah KSA
Industrial Automation Powered by Arduino, Upgraded for Legacy Systems The Arduino Opta RS485 (AFX00001) builds upon the solid, secure foundation of the Opta micro PLC series by integrating a dedicated RS485 port. Developed in partnership with industrial leader Finder, this variant bridges the gap between modern Industrial IoT (IIoT) capabilities and established industrial protocols. By featuring RS485 half-duplex connectivity, this PLC allows professionals to seamlessly interface with legacy machinery, variable frequency drives (VFDs), smart meters, and standard Modbus RTU networks. It retains the powerful STM32H747XI dual-core MCU, enabling rapid, real-time control and predictive maintenance. Users can program the unit utilizing traditional Arduino sketches or standard IEC 61131-3 PLC languages (such as Ladder Logic and Function Block Diagram) via the Arduino PLC IDE. Designed for secure, uninterrupted operations, it features an onboard ATECC608B crypto chip for hardware-level security and secure Over-The-Air (OTA) firmware updates.
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Specifications
Category | Specification Details |
Brand | Arduino PRO |
Model/SKU | Opta RS485 (AFX00001) |
Supply Voltage | 12…24 V DC |
Processor | STM32H747XI Dual ARM® Cortex® (M7 & M4) |
Inputs | 8x Configurable Digital / Analog (0-10V) Inputs |
Outputs | 4x Relays (Normally Open, 250 V AC - 10 A max per relay) |
Connectivity | RS485 (Half-Duplex), 10/100 Ethernet (RJ45), USB-C® |
Memory | 1MB RAM, 2MB Internal Flash + 16MB Flash QSPI |
Security | ATECC608B Secure Element |
Operating Temperature | -20 °C to +50 °C (-4°F to 122°F) |
IP Protection Rating | IP20 |
Certifications | cULus listed, ENEC, CE |
Additional Details
Key Features & Advantages
Enhanced Connectivity: Features an onboard RS485 port for Modbus RTU communication, alongside a 10/100 Ethernet port (TCP/IP or Modbus TCP) and a USB-C® port.
Dual-Core Processing Power: Powered by the STM32H747XI Dual ARM® Cortex® (M7 up to 480 MHz and M4 up to 240 MHz) for high-speed, real-time industrial control.
Versatile Programming: Fully compatible with the Arduino IDE and Arduino PLC IDE (supporting Ladder, FBD, ST, SFC, and IL).
High-Power Actuation: Equipped with 4 robust electromechanical relays (Normally Open) capable of switching up to 250 VAC at 10 A each (4 x 2.3 kW).
Hardware-Level Security: The integrated ATECC608B secure element ensures safe data transfer to the Cloud and secure OTA updates.
DIN Rail Ready: Compact, industry-standard form factor designed for immediate integration into control panels.
Related Products
The Ultimate Wireless Solution for Industrial IoT (IIoT) The Arduino Opta WiFi (AFX00002) is the most advanced model in the Opta micro PLC lineup, delivering unparalleled wireless connectivity for modern industrial automation. Co-designed with automation experts Finder, this programmable logic controller perfectly bridges the gap between the flexible Arduino ecosystem and demanding industrial environments. By integrating onboard Wi-Fi (802.11 b/g/n) and Bluetooth® Low Energy (BLE) alongside standard Ethernet and an RS485 port, the Opta WiFi enables seamless, over-the-air monitoring and control without the need for complex network cabling. Driven by the robust STM32H747XI dual-core processor, it easily handles real-time control, data logging, and predictive maintenance. Automation engineers can rapidly deploy logic using standard IEC 61131-3 PLC languages (such as Ladder and FBD) via the Arduino PLC IDE. Equipped with a dedicated ATECC608B hardware crypto chip, it guarantees secure boot, secure Over-The-Air (OTA) firmware updates, and safe data transmission to the Arduino Cloud or third-party dashboards.
Industrial IoT Automation Powered by Arduino and Finder The Arduino Opta Lite (AFX00003) is a secure, easy-to-use micro Programmable Logic Controller (PLC) designed with Industrial IoT capabilities. Developed in a strategic partnership with Finder - a leading manufacturer of industrial and building automation devices - the Opta Lite allows professionals to scale up automation projects while leveraging the open and widely known Arduino ecosystem. Designed with PLC engineers in mind, it supports both traditional Arduino sketches and standard IEC 61131-3 PLC languages, including Ladder Logic (LD) and Function Block Diagram (FBD). At its core is a powerful STM32H747XI dual-core MCU, enabling users to perform real-time control, monitoring, and predictive maintenance. Secure and durable by design, it supports Over-The-Air (OTA) firmware updates and ensures data security from the hardware level to the Cloud via an onboard ATECC608B secure element. The "Lite" variant is highly agile, featuring onboard 10/100 Ethernet and a USB-C® port for fast programming and data logging.