Zelio Logic smart relay
In today’s fast-paced world of industrial automation, simplicity, flexibility, and reliability are more crucial than ever—especially when it comes to small-scale control systems. That’s where Zelio Logic smart relays by Schneider Electric step in: a compact, intelligent, and cost-effective solution engineered to make automation smarter, easier, and more efficient from the ground up.
Whether you’re designing basic control panels, automating lighting systems, managing HVAC operations, or controlling pumps and motors, Zelio Logic relays offer the perfect balance between functionality and affordability. With an intuitive programming environment (compatible with both ladder logic and function block diagrams), and a clear LCD display, these smart relays are accessible to both seasoned engineers and newcomers alike.
Zelio Logic relays come packed with built-in timers, counters, analog and digital I/O, and communication ports (including Modbus support)—delivering PLC-like capabilities at a fraction of the cost. They’re built tough to withstand industrial environments, making them ideal for OEMs, panel builders, electricians, facility managers, and even educational institutions looking for an affordable entry into automation.
Installation is a breeze thanks to modular design, DIN rail mounting, and plug-and-play connectivity. The compact size saves valuable panel space, while flexible expansion modules allow your system to grow as your needs evolve. Remote diagnostics and monitoring are also possible with communication-ready models—giving you real-time insight and control.
Backed by Schneider Electric’s global legacy of innovation and reliability, Zelio Logic relays help you reduce wiring complexity, cut down installation time, minimize downtime, and enhance overall operational efficiency.
If you’re on the hunt for a modern, scalable, and smart automation solution that doesn’t compromise on control or quality, Zelio Logic smart relays are your go-to choice for mastering automation simply and affordably.
What Is a Smart Relay?
A smart relay is a compact, programmable control device designed for automating basic to moderately complex industrial and commercial systems. Ideal for applications like lighting control, water pump systems, HVAC, automatic gates, conveyor belts, and small machines, a smart relay merges the functions of traditional relays, timers, counters, and logic control into a single, easy-to-use unit. It acts as a mini programmable logic controller smart relay vs PLC, providing essential automation features without the complexity or cost of a full-scale PLC system.
Smart relays are known for their user-friendly interfaces, often with LCD displays and simple programming software, making them accessible even to non-programmers. They support a variety of input/output configurations and can be programmed for custom logic operations, such as on/off control, sequential tasks, and timed operations. Thanks to their compact size, energy efficiency, and versatile functionality, smart relays are a popular choice in building automation, industrial control panels, agricultural systems, and even DIY automation projects.
In short, if you’re looking for a cost-effective, reliable, and easy-to-install automation solution, smart relays provide the perfect balance of intelligence and simplicity for a wide range of applications.
Zelio Logic at a Glance
Zelio Logic automation is Schneider Electric’s innovative range of smart relays, specifically engineered for simple and cost-effective automation applications. Designed to bridge the gap between traditional control relays and full-fledged smart relay vs PLC, Zelio Logic provides a compact, powerful, and user-friendly solution for a wide variety of control needs. Whether you’re working on building automation, small-scale machinery, energy management systems, or infrastructure projects, Zelio Logic smart relays are your reliable partner for achieving flexible and efficient automation.
With features like intuitive programming via Zelio Soft software, support for multiple I/O configurations, and an integrated LCD screen for real-time monitoring, Zelio Logic automation makes control system design both smart and simple. It offers reliable performance, fast commissioning, and easy integration into existing panels or new installations. These smart relays are ideal for applications such as lighting control, irrigation systems, HVAC control, gate automation, and more.
Built with Schneider Electric’s global quality standards, Zelio Logic automation ensures long-term durability, scalability, and energy-efficient operation. Whether you’re an OEM, system integrator, or facility manager, Zelio Logic automation is the go-to automation solution for anyone looking to streamline operations without the complexity of a full smart relay vs PLC system.
Key Features of Zelio Logic Smart Relays
Zelio Logic by Schneider Electric is packed with intelligent features that make it the ideal choice for simple automation tasks in both industrial and commercial environments. Here’s a closer look at what makes it stand out:
- Modular Design: Zelio Logic is available in both compact and modular versions, giving users the flexibility to choose the right form factor for their specific control panel or machinery layout. Its modularity allows for easy expansion and customization.
- I/O Flexibility: With models supporting up to 40 inputs and outputs (I/Os), Zelio Logic adapts effortlessly to a wide range of automation requirements. This makes it perfect for everything from lighting and HVAC control to conveyor belts and pump systems.
- Easy Programming: The relay is programmed using Zelio Soft software, supporting Ladder Logic and Function Block Diagram (FBD) languages. This makes configuration quick and simple even for users with minimal programming experience.
- LCD Display Interface: Select models feature an integrated LCD screen, enabling users to monitor system status, view active logic operations, and make basic parameter adjustments directly on-site no external tools required.
- Advanced Communication: Certain models are equipped with Modbus communication capabilities, allowing seamless integration with other smart relay vs PLC systems, HMIs, and SCADA platforms for centralized control and monitoring.
- Non-Volatile Memory Backup: Zelio Logic includes reliable memory backup, ensuring that programs, settings, and parameters are safely retained during power failures or unexpected shutdowns minimizing downtime and troubleshooting.
- Built-in Timer and Counter Functions: With predefined logic blocks for tasks like on/off delays, pulse generation, event counting, and more, Zelio Logic simplifies the development of automation sequences without the need for additional components.
These features make Zelio Logic smart relays an excellent solution for applications in industrial control panels, building management systems, energy-saving installations, and more. If you’re looking for a smart, efficient, and scalable relay solution, Zelio Logic checks all the boxes.
Applications of Zelio Logic Smart Relays
Zelio Logic is the ideal choice for automation scenarios where a full-scale smart relay vs PLC might be excessive or cost-prohibitive. This compact smart relay delivers reliable performance in a variety of control and monitoring applications, helping users achieve automation efficiency without complexity. Here’s where Zelio Logic truly shines:
Building Automation:
- Zelio Logic is widely used in commercial and residential automation systems, offering simplified control over:
- Lighting control systems for energy efficiency and scheduling
- HVAC (Heating, Ventilation, and Air Conditioning) systems for temperature and environment regulation
- Automatic gates, blinds, and shutters, enabling smarter access and ambient control
- These applications not only boost comfort and security, but also contribute to sustainable energy usage in smart buildings.
Industrial Applications:
- In small-scale industrial automation, Zelio Logic offers a robust alternative to traditional relays and smart relay vs PLC:
- Control of small machines and standalone production equipment
- Conveyor system management for packaging, assembly, and logistics
- Pump and water treatment automation in agriculture, manufacturing, and municipal projects
- Its compact footprint and modularity make it ideal for tight panel spaces and retrofit projects.
Energy Management Systems:
- Zelio Logic supports smarter energy usage and fault diagnostics:
- Load shedding and load management during peak hours
- Power factor correction control, helping to maintain optimal system performance
- Monitoring, alarms, and system fault detection, reducing downtime and improving safety
- These features are crucial in commercial facilities, energy plants, and infrastructure systems aiming to improve energy efficiency and reduce operational costs.
Programming Made Easy with Zelio Soft
Gone are the days of complex coding! Zelio Soft—the dedicated software for programming Zelio Logic smart relays—makes the process of configuring automation quick, intuitive, and accessible to both beginners and professionals.
Whether you’re a technician, system integrator, or DIY enthusiast, Zelio Soft offers:
- Drag-and-drop Function Block Diagram (FBD) programming for fast logic creation
- Traditional Ladder Logic programming for experienced users
- A graphical, user-friendly interface that minimizes learning curves
- Simulation tools to test and troubleshoot programs before deployment
- Real-time monitoring and diagnostics, improving on-site performance and reducing commissioning time
- Zelio Soft supports Windows OS and allows offline program development, making it the perfect tool for flexible work environments.
Features of Zelio Soft – Your Smart Automation Programming Tool
Zelio Soft is the powerful and intuitive programming software developed by Schneider Electric specifically for Zelio Logic smart relays. It provides a seamless experience for configuring, testing, and monitoring your automation logic—no advanced coding skills required. Here’s a deeper look at the standout features that make Zelio Soft a go-to tool in the automation world:
Simulation Mode: One of the most valuable features for automation professionals, simulation mode lets you test your logic program virtually before deploying it to the actual hardware. This reduces errors, saves time during commissioning, and improves overall system reliability.
User-Friendly Graphical Interface: Zelio Soft offers an easy-to-use, drag-and-drop interface that supports both Function Block Diagram (FBD) and Ladder Logic programming. This visual programming environment makes it simple for beginners to learn and for experienced users to work quickly and efficiently.
Flexible Upload/Download Options: Depending on your model, you can upload and download programs via USB, Ethernet, or serial connections. This enhances connectivity and makes it easy to update logic on-site or remotely, especially useful for multi-location control systems.
Real-Time Monitoring & Diagnostics: View live data, monitor input/output status, and identify issues instantly. This real-time feedback helps with troubleshooting, system optimization, and ensures faster problem resolution during maintenance.
Offline Programming Capability: Zelio Soft allows you to create and edit automation programs offline, meaning you can work from anywhere and upload your logic when you’re back on-site.
Compatibility with Windows Operating Systems: Zelio Soft runs smoothly on various Windows platforms, making it accessible for most users without special system requirements.
Program Storage & Backup: Easily save and archive multiple projects, making version control and program re-use a breeze for repetitive or modular installations.
Whether you’re developing automation for building systems, industrial equipment, or energy management applications, Zelio Soft simplifies the process, enhances accuracy, and reduces deployment time. It’s a reliable companion to the Zelio Logic smart relay designed to empower professionals and streamline automation tasks with precision and ease.
Zelio Logic vs. PLC – What’s the Difference?
Feature Zelio Logic Traditional PLC
Complexity Low to Medium Medium to High
Programming Simple (Ladder/Blocks) Advanced (Ladder/ST/FB)
Cost Low Higher
Ideal For Small systems Large, complex systems
Expandability Limited High
Zelio Logic Product Range – Flexible Options for Every Automation Need
The Zelio Logic smart relay series from Schneider Electric is designed to offer flexible and scalable solutions for a wide variety of automation and control applications. With a focus on adaptability, performance, and ease of use, the product range is divided into two main formats to suit different project requirements:
Compact Models – SR2 Series
- The SR2 series features all-in-one compact smart relays with fixed input/output (I/O) configurations. These models are ideal for space-constrained control panels and small-scale automation systems where expansion isn’t required.
- Available with LCD display and navigation buttons for on-site control
- Predefined I/O combinations to streamline installation
- Perfect for simple applications like lighting control, HVAC, and irrigation systems
Modular Models – SR3 Series
- The SR3 series offers a more modular and expandable architecture, allowing users to customize their relay setup based on the specific I/O needs of the project.
- Supports additional I/O expansion modules, providing greater scalability
- Best suited for industrial automation, machine control, and multi-device systems
- Offers models with communication options like Modbus for system integration
Popular Models and Configurations
- Zelio Logic SR2 B121BD – Compact unit with display, 12 I/Os
- Zelio Logic SR2 B201BD – Compact with more I/Os and advanced timing features
- Zelio Logic SR3 B261BD – Modular model with extended I/O and communication support
- SR3 XT43BD – Digital I/O expansion module for modular systems
Whether you’re handling a standalone machine, a building control system, or a distributed energy management setup, Zelio Logic has a model tailored for your needs. With wide voltage range options (12V, 24V, 100–240V), relay/transistor output types, and LCD or non-LCD versions, there’s a Zelio Logic smart relay to match your exact automation task.
Why Choose Zelio Logic Smart Relays?
When it comes to choosing the right solution for basic to mid-level automation, Zelio Logic smart relays by Schneider Electric tick all the right boxes. They combine performance, reliability, and affordability in a compact and easy-to-deploy package. Here’s why professionals across industries trust Zelio Logic for their control needs:
Time-Saving Setup
Zelio Logic relays are designed for quick and hassle-free installation. With plug-and-play components, pre-configured logic blocks, and intuitive wiring layouts, they significantly reduce setup and commissioning time especially valuable for time-sensitive projects.
Easy Programming with Zelio Soft
Forget complicated smart relay vs PLC coding. Zelio Logic is programmed using Zelio Soft, a user-friendly software platform that supports both Ladder Logic and Function Block Diagram (FBD) programming. The drag-and-drop interface, simulation mode, and real-time monitoring make automation setup accessible to beginners and efficient for experts.
Cost-Effective Automation Solution
Zelio Logic provides the core features of a programmable logic controller (smart relay vs PLC) at a fraction of the cost. It’s the ideal choice for applications where a full-scale PLC would be overkill helping users save on both hardware and engineering resources.
Proven Schneider Electric Quality
Backed by Schneider Electric’s global reputation for innovation, safety, and quality, Zelio Logic offers dependable performance in even the most demanding environments. Built with industrial-grade components, it ensures long-term durability and minimal maintenance.
Perfect for OEMs, Panel Builders, and Facility Managers
Zelio Logic is a favorite among OEMs, control panel builders, and facility maintenance professionals due to its scalable design, versatile programming options, and broad range of models. Whether you’re automating a single machine or managing multiple systems across a site, Zelio Logic delivers simplicity without sacrificing control.
Wide Range of Applications
From building automation and energy management to machine control, pump systems, and lighting, Zelio Logic adapts effortlessly to diverse use cases. Its compact footprint and I/O flexibility make it suitable for everything from small enclosures to distributed control systems.
Pro Tips for Getting the Most Out of Zelio Logic Smart Relays
Whether you’re a seasoned automation engineer or just starting your journey with smart relays, following a few best practices can save time, reduce errors, and make your Zelio Logic experience smoother and more efficient. These expert tips will help you unlock the full potential of your Schneider Electric Zelio Logic smart relay:
Use Simulation Mode in Zelio Soft Before Going Live
Before deploying your program to a live system, always run it through the simulation mode in Zelio Soft. This feature allows you to test your logic sequences, verify timing, and detect errors early—saving you from costly mistakes and unnecessary downtime.
Label Inputs and Outputs Clearly
Organizing and labeling your I/Os in both the software and physical wiring can be a real lifesaver during troubleshooting and maintenance. A clear naming convention helps you and your team quickly identify signals, diagnose issues, and make updates without confusion.
Regularly Save and Backup Your Projects
Trust us always keep backups of your logic programs. Whether it’s for restoring after a power outage, moving projects between systems, or recovering from a corrupted file, having a backup can be a game-changer. Zelio Soft makes it easy to export and store multiple program versions.
Leverage Built-In Function Block Libraries
Zelio Soft comes loaded with a rich library of predefined function blocks timers, counters, set/reset logic, and more. These can dramatically reduce development time and make your automation sequences more reliable and easier to maintain.
Keep Firmware and Software Updated
Ensure your Zelio Soft software and Zelio Logic hardware firmware are updated to the latest versions. Schneider Electric frequently releases improvements and bug fixes that enhance performance, add new features, and improve compatibility with newer systems
Document Your Logic for Future Reference
Add comments and documentation within your program to explain how the logic works. This not only helps future maintenance but also makes handovers easier if someone else needs to work on the same system.
Start Simple, Scale as Needed
Zelio Logic is designed to be modular and scalable, so don’t feel pressured to create complex logic right out of the gate. Start with the basics, validate your functionality, then expand as your system grows or your needs evolve.
Conclusion
Zelio Logic smart relays by Schneider Electric prove that intelligent automation doesn’t have to be complex or expensive. Designed with flexibility and simplicity in mind, Zelio Logic is the perfect solution for small to medium-scale control applications across multiple industries.
Whether you’re automating a lighting system in a smart building, managing HVAC controls, operating a pump station, or controlling small machinery on the factory floor, Zelio Logic delivers powerful performance in a compact form. With its modular design, user-friendly programming via Zelio Soft, and robust reliability, it’s a favorite among OEMs, system integrators, panel builders, and facility managers.
Here’s why more professionals are choosing Zelio Logic for their automation needs:
- Simplified setup that saves time and effort
- Cost-effective smart relay solution with PLC-like capabilities
- Trusted Schneider Electric quality for long-term durability
- Scalable product range that adapts to your project size
- Easy-to-use programming interface that cuts learning curves
FAQs
1. What is Zelio Logic?
Zelio Logic is Schneider Electric’s range of smart relays designed for simple automation tasks. It combines the functionality of relays, timers, counters, and logic controllers in a compact, programmable unit.
2. How is a smart relay different from a PLC?
Smart relays like Zelio Logic are ideal for basic to mid-level automation, offering simplified programming and lower costs compared to traditional PLCs. smart relay vs PLC are more suitable for complex and large-scale control systems.
3. What industries use Zelio Logic smart relays?
Zelio Logic is used in building automation, HVAC control, energy management, agriculture, water treatment, and small machinery automation across various industries.
4. Can I program Zelio Logic without coding experience?
Yes! With Zelio Soft software, you can use drag-and-drop Function Block Diagrams (FBD) or Ladder Logic—making it super easy, even for beginners.
5. What types of applications is Zelio Logic suitable for?
Zelio Logic is great for lighting control, irrigation systems, HVAC systems, automatic gates, pump control, and small-scale industrial equipment.
6. What’s the difference between the SR2 and SR3 series?
SR2: Compact models with fixed I/Os—best for small applications.
SR3: Modular models with expandable I/Os and communication options like Modbus—ideal for larger, flexible systems.
7. What programming languages does Zelio Soft support?
Zelio Soft supports Ladder Logic and Function Block Diagram (FBD), making it versatile for different user preferences and experience levels.
8. Does Zelio Logic support Modbus communication?
Yes, certain models support Modbus RTU, allowing integration with SCADA systems, HMIs, and other smart relay vs PLC.
9. Can I simulate the logic before uploading it to the device?
Absolutely! Zelio Soft has a Simulation Mode that lets you test and validate your logic offline before applying it to your system.
10. What power supply voltages are available for Zelio Logic?
Zelio Logic is available in 12V, 24V, and 100–240V versions to suit different installation environments.
11. Is Zelio Logic suitable for OEMs and panel builders?
Yes! Its compact design, modularity, and easy programming make it a top pick for OEMs, system integrators, and panel builders.
Also Read: Introduction to Harmony SCU: Compact Control with Built-in HMI
