# Schneider Electric Zelio Logic SR2B121BD Programmable Relay 24V DC

**URL:** https://aio.lv/en/product--schneider-electric-sr2b121bd--12469118
**Data updated:** 2026-05-18 09:44 (EEST)
**Category:** Control Systems
**Manufacturer:** Schneider Electric
**Manufacturer code:** SR2B121BD
**EAN:** 3389110547542
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Schneider Electric Zelio Logic SR2B121BD is a compact programmable relay designed for small automation systems. Operating at 24V DC, this controller features 12 I/O points, providing reliable logic control for industrial and building automation tasks. It is ideal for simple control applications, offering easy programming and integration into various electrical control panels.

## Long description

The Schneider Electric Zelio Logic SR2B121BD is a compact and efficient programmable relay engineered for small-scale automation systems. Operating on a 24V DC power supply, this controller provides 12 I/O points to facilitate precise logic control in various industrial and building automation environments. Its robust design ensures reliable performance, making it a dependable choice for managing electrical control panels and automated processes.
Advantages
This programmable relay stands out due to its compact footprint, which allows for space-saving installation in crowded control cabinets. The device is designed for intuitive programming, significantly reducing the time required for setup and configuration. Its reliable operation under 24V DC conditions ensures consistent performance in demanding environments, while the integration of 12 I/O points provides sufficient flexibility for a wide range of basic automation tasks.
Suitable for
Small-scale industrial automation systems
Building automation and lighting control
HVAC system management
Simple machine control applications
Access control and security systems
When it may not be suitable
This device is not intended for complex automation tasks that require high-speed processing, extensive memory capacity, or a large number of input and output points. It is also not suitable for applications requiring advanced communication protocols or high-level motion control functionality.
Key specifications
Supply voltage: 24V DC
Total I/O points: 12
Compact modular design
Programmable logic control functionality
DIN rail mounting compatibility
How to use
To use the Zelio Logic relay, mount the unit onto a standard DIN rail within your electrical control panel. Connect the 24V DC power supply to the designated terminals, ensuring correct polarity. Wire your input sensors and output actuators to the respective I/O terminals according to your specific wiring diagram. Use the compatible programming software to develop your logic, then transfer the program to the relay via the appropriate connection cable to begin automated operations.
What to consider before purchase
Verify that your system power supply is 24V DC
Ensure the 12 I/O points are sufficient for your project requirements
Check the physical dimensions to ensure it fits your control panel
Confirm that your programming environment supports this specific relay model
Usage recommendations
Always ensure that the power supply is disconnected before performing any wiring or maintenance tasks. Follow all local electrical safety regulations and ensure proper grounding of the control panel to prevent interference and equipment damage.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Schneider Electric products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Schneider Electric service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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