Arduino Opta RS485
Unleash the power of Opta—the ultimate micro PLC for flexible, connected automation. Buy now and get 3 months of Arduino Cloud Enterprise for free!
Overview
Arduino Opta is a secure, easy-to-use micro PLC with Industrial IoT capabilities.
Designed in partnership with Finder – leading industrial and building automation device manufacturer – Opta allows professionals to scale up automation projects while leveraging the Arduino ecosystem. Supporting both Arduino sketch and standard PLC languages, including LD (Ladder Logic Diagram) and FBD (Function Block Diagram), it was designed with PLC engineers in mind.
Its powerful STM32H747XI dual-core Cortex®-M7 +M4 MCU allows users to perform real-time control, monitoring and implement predictive maintenance applications.
Secure and durable by design, it supports OTA firmware updates and ensures data security from the hardware to the Cloud thanks to the onboard secure element and X.509 Standard compliance. In addition, Opta undergoes regular assessments to uphold and improve its cybersecurity posture.
All while maintaining Arduino Pro’s signature easy deployment in production thanks to a vast range of readily available software libraries and Arduino sketches.
Last but not least, various connectivity options make keeping everything under control effortless via real-time dashboards combined with the intuitive Arduino Cloud (or third-party services).
Opta comes in three variants so you can choose the best option for your project. Opta RS485 features Ethernet onboard and USB-C programming ports and RS485 half duplex connectivity interface.
Need Wi-Fi/Bluetooth® Low Energy connectivity? Opta WiFi is the best variant for you.
Happy with just Ethernet and USB-C? Check out Opta Lite.
Program it with the Arduino PLC IDE!
The Arduino PLC IDE makes PLC programming easy. Choose any of the 5 programming languages defined by the IEC 61131-3 standard (Ladder, Functional Block Diagram, Structured Text, Sequential Function Chart or Instruction List) and quickly code PLC applications or port existing ones to Arduino Opta.
Key benefits include:
- Easy and fast software development, starting from ready-to-use Arduino sketches, tutorials and libraries
- Support for standard IEC 61131-3 PLC languages
- Fieldbus integration via Modbus TCP (ethernet) and Modbus RTU (serial RS485)
- Real-time remote monitoring via intuitive Arduino Cloud dashboards (or third-party services)
- Security at the hardware level thanks to onboard secure element and X.509 Standard compliance
- Secure OTA firmware updates and Cloud device management
- High-power relay switching (4 x 2.3 kW)
- Reliable by design, thanks to industrial certifications and Finder’s expertise in switching technology
- Easy to install, with DIN rail compatibility
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Plus, during Arduino Days, purchase the Opta RS485 and receive 3 months of free access to the Arduino Cloud Enterprise Plan—unlocking advanced features like OTA updates, data retention, and role-based access control to fully empower your industrial automation systems. Learn more in our Terms and Conditions page.
How to redeem your 3 months of Cloud access
After purchasing the Opta of your choice, you'll receive a voucher code via email from cloud@arduino.cc
To redeem it, follow the instructions provided by the email on our digital store. After purchasing the plan, you'll receive a confirmation email.
Opt in to industrial automation
Integrate a solid and reliable micro PLC with your existing machines, devices and production lines – also in combination with other elements in the modular and versatile Arduino ecosystem, from small and smart sensor-packed modules to SOMs to gateways, for end-to-end solutions that can be customized to meet any need.
Quality by design
Arduino Pro partnered with Finder, a leader in the field of electromechanical and electronic components with 65+ years of excellence and expertise to its name, to create a product with high-quality production specs for even the most demanding work conditions in industrial environments.
Need Help?
Check the Arduino Forum for questions about the Arduino Language, or how to make your own Projects with Arduino. If you need any help with your product, please get in touch with the official Arduino User Support as explained in our Contact Us page.
Warranty
You can find your product warranty information here.
Tech specs
| Input | 8x configurable digital / analog (0-10V) input |
| Processor | STM32H747XI Dual ARM® Cortex®:
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| Connectivity | Support 10/100 Ethernet (TCP/IP or Modbus TCP) USB-C RS485 half duplex |
| Memory | 1MB RAM (programming) 2MB internal + 16MB Flash QSPI |
| RTC | Typical 10 days power retention at 25°C NTP sync available through ethernet |
| IP protection | IP20 |
| Output | 4x relays (250 V AC - 10 A) |
| Programming languages |
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| Security | ATECC608B Secure element |
| Supply voltage | 12…24 V DC |
| Operating Temperature | -20 °C to +50 °C (-4°F to 122°F) |
| Certifications | cULus listed, ENEC, CE |
Resources for Safety and Products
Manufacturer Information
The production information includes the address and related details of the product manufacturer.
Arduino S.r.l.
Via Andrea Appiani, 25
Monza, MB, IT, 20900
https://www.arduino.cc/
Responsible Person in the EU
An EU-based economic operator who ensures the product's compliance with the required regulations.
Arduino S.r.l.
Via Andrea Appiani, 25
Monza, MB, IT, 20900
Phone: +39 0113157477
Email: support@arduino.cc
Documentation
Learn more
Get Inspired
In a world where industrial automation is rapidly advancing, education often struggles to keep pace. This disconnect leaves a big gap in practical, industry-relevant skills among graduates. Addressing this critical need, we’re excited to introduce the Arduino PLC Starter Kit. Powered by the robust Arduino Opta mini PLC and backed by the intuitive Arduino PLC IDE, this kit is set to revolutionize programmable logic control education. Continue reading to find out more about the PLC Starter Kit. What is the Arduino PLC Starter Kit? Before we delve into the details of this exciting new offering, let’s explain exactly what a PLC is. A Programmable Logic Controller (PLC) is a type of industrial computer that’s used to automate, control and coordinate a wide range of manufacturing processes and machinery. The Arduino PLC Starter Kit isn’t just another educational tool; it's a comprehensive solution designed to bridge the gap between theoretical knowledge and practical application in industrial automation — a powerful simulation tool specifically created for vocational and university students considering a career in manufacturing. Here’s what this groundbreaking kit offers: 20 hours of in-depth lessons — Explore the world of programmable logic control with the 'Explore PLC' course. The course has been created by educators and covers all the essential contents including the history of programmable logic controllers, Modbus RS-485 communications, and how PLCs integrate with industrial simulated systems. Arduino Opta WiFi — Built with industrial IoT capabilities, our versatile and easy-to-use micro PLC offers real-time control, monitoring, and predictive maintenance for a variety of applications. Based on the existing Arduino Opta WiFi, it includes the STM32H747XI dual-core Arm® Cortex®-M7 +M4 MCU, making it exceptionally reliable and robust for your classroom.Digital input and output simulators – The kit’s custom-designed
