
Arduino Pro Opta Ext D1608E
The snap-on expansion module to enhance Arduino Opta’s applications with the addition of 16 programmable voltage inputs and 8 electromechanical relays.
Overview
Arduino Pro Opta Ext D1608E enhances your Arduino Opta’s real-time control, monitoring and predictive maintenance applications with the addition of 16 programmable voltage inputs and 8 electromechanical relays 250 VAC 6A to operate your machines.
Just snap on the module to extend your system’s capabilities flexibly and quickly, and manage the new I/Os from the Opta base unit seamlessly, taking advantage of the open and widely known Arduino ecosystem or PLC IDE IEC 61131-3 programming environment.
Key benefits:
- Flexible inputs: 16 new voltage inputs for your applications per each expansion added, programmable as digital or analog.
- Powerful outputs: 8 electromechanical relays offering 250 VAC for 6A each.
- Up to 5 snap-on modules can be managed to multiply and mix a set of I/Os with seamless detection: snap them right next to your Opta base module and use the I/Os as native Opta resources.
- Extend your hardware capabilities while keeping programming accessible, by using the Arduino IDE with its wide range of ready-to-use sketches, tutorials and libraries.
- Put your new I/Os easily to work with the PLC IDE for IEC 61131-3 PLC languages, taking advantage of its low-code approach and pre-mapped resources.
- Extend the Opta’s benefits of real-time remote monitoring via intuitive Arduino Cloud dashboards and secure communication to a wider set of connected devices.
- Reliable by design, thanks to industrial certifications and Finder’s expertise in electronic devices.
- Easy DIN rail installation.
Applications
Opta’s digital expansions are ideal to increase the number of real-time control points in the manufacturing sector and in any building automation project.
The Opta Ecosystem is compatible with all major cloud providers – but choosing the simplicity of Arduino Cloud can really make a difference, for anyone who wants to build, customize and remotely manage their own dashboards.
Looking for a similar option?
Check out the Arduino Pro Opta Ext D1608S, to add 8 solid-state relays 24 VDC 2A to your Opta-based solution.
Conformities
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
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Get Inspired

Save the date on May 28th-30th, Arduino will be back at SPS Italia in Parma, showcasing how our open-source solutions are revolutionizing the industrial sector with high performance and accessibility. At Arduino’s booth #C020, hall 7, we’ll be presenting the latest additions to our ecosystem, designed to help companies of all sizes embrace digital transformation and the Industrial IoT. Here’s a sneak peek at what’s in store: Opta: the “Swiss Army knife” of industrial automation Opta is our versatile micro PLC: reliable, secure, and open-source, it avoids vendor lock-in and is the ideal choice for both newcomers and seasoned professionals. Opta can be programmed with standard IEC 61131-3 languages or within Arduino’s environment, offering unmatched flexibility. “With Opta, we aim to support companies looking for increased visibility into their processes through IoT retrofitting, breaking down barriers to industrial automation, and those that produce machinery, seeking a ready-to-use controller for IoT and edge AI. Opta offers high performance, secure connectivity, and unprecedented programming flexibility at an affordable price,” says Arduino’s CEO Fabio Violante. Opta Expansion Modules to boost your projects New expansion modules allow you to enhance Opta’s capabilities: the Arduino Pro Opta Ext D1608E, Arduino Pro Opta Ext D1608S, and Arduino Pro Opta Ext A0602 provide additional programmable inputs, relay outputs, and analog I/O options for diverse data acquisition and control needs. Live demos for a hands-on experience Explore live demonstrations of Opta and other key products from our Portenta and Nicla families. Discover how these solutions can be applied to industrial automation, remote monitoring, predictive maintenance, and more! A strategic partnership with Melchioni Electronics We’re excited to collaborate with Melchioni Electronics, enhancing our reach and support for Arduino’s innovative solutions.