Introduction

The Schneider SR3B261FU Modular Smart Relay Module is a powerful control solution from the Zelio Logic family, designed for automation applications requiring increased I/O capacity and reliable programmable operation. With 26 I/O points, 100 to 240 V AC power supply compatibility, integrated display, and clock functionality, it delivers an efficient solution for industrial equipment, machine control, and building automation projects.

Built for OEM manufacturers, system integrators, and industrial engineers, the SR3B261FU combines simple programming with advanced smart relay functionality. Its modular structure allows flexible system expansion while maintaining a compact footprint, making it an effective choice for applications where reliability, scalability, and easy maintenance are required.

Technical Specifications

Parameter	Specification
Brand	Schneider Electric
Model Number	SR3B261FU
Product Type	Modular Smart Relay Module
Product Range	Zelio Logic
Module Type	Smart Relay Module
Power Supply Voltage	100...240 V AC
Supply Voltage Range	85...264 V AC
Total I/O Points	26
Number of Inputs	16 Discrete Inputs
Number of Outputs	10 Relay Outputs
Programming Method	Ladder Logic / Function Block Diagram
Display	Integrated Display
Clock Function	Available
Memory Type	EEPROM Backup Memory
Program Capacity	Up to 240 Ladder Lines / 500 FBD Lines
Cycle Time	6...90 ms
Mounting Type	DIN Rail Mounting
Operating Temperature	0...55°C
Dimensions (W × H × D)	124.6 × 90 × 59.5 mm
Weight	Approx. 400 g

Recommended Companion Models

Model	Product Name
SR3B261BD	Schneider Zelio Logic Modular Smart Relay Module 24 V DC
SR3B101FU	Schneider Zelio Logic Modular Smart Relay Module
SR2MEM02	Schneider Zelio Logic EEPROM Memory Module
SR2USB01	Schneider Zelio Logic USB Programming Cable

Frequently Selected Alternatives

Model	Product Name
SR3B262BD	Schneider Zelio Logic Modular Smart Relay Module
SR3B261B	Schneider Zelio Logic Modular Smart Relay Module 24 V AC
SR2E201FU	Schneider Zelio Logic Compact Smart Relay Module
SR2B201FU	Schneider Zelio Logic Compact Smart Relay Module

Where It Excels in Industrial Use

• Expanded Machine Automation Control
The SR3B261FU provides a flexible programmable control solution for industrial machines, production equipment, and OEM systems requiring more I/O capacity than standard compact smart relays.

• Building Automation Management
Suitable for lighting control, HVAC automation, pumping systems, and facility applications where scheduled operation and reliable logic control are essential.

• Customized OEM Equipment Solutions
Designed for machine manufacturers that need a compact controller with integrated display, programmable logic, and expansion capability for customized equipment designs.

• Industrial Control System Upgrades
Helps replace traditional relay-based control circuits with a programmable automation solution that improves flexibility, troubleshooting efficiency, and system maintainability.

Key Strengths at a Glance

• High-Capacity Smart Relay Platform
The SR3B261FU provides 26 I/O points, including 16 discrete inputs and 10 relay outputs, making it suitable for more complex automation applications within the Zelio Logic range.

• Flexible Programming Capability
Supports ladder logic and function block diagram programming, allowing engineers to create customized automation sequences with efficient development workflows.

• Integrated Display and Clock Functions
The built-in display and clock functions provide convenient local monitoring, parameter adjustment, and time-based automation control.

• Reliable Program Backup Function
Built-in EEPROM memory backup helps retain application programs and supports fast recovery after power interruptions, improving operational continuity.

Technical FAQs

1. What type of product is the Schneider SR3B261FU?
The Schneider SR3B261FU is a Zelio Logic modular smart relay designed for programmable automation control applications.

2. What power supply voltage does the SR3B261FU require?
The SR3B261FU operates with a 100 to 240 V AC power supply suitable for industrial automation environments.

3. How many inputs and outputs are available on the SR3B261FU?
The SR3B261FU provides 16 discrete inputs and 10 relay outputs, offering a total of 26 I/O points for control applications.

4. Which programming methods are supported by the SR3B261FU?
The SR3B261FU supports ladder logic and function block diagram programming methods through compatible Zelio Logic software.

5. Does the SR3B261FU include a local display?
Yes, the SR3B261FU features an integrated display that allows local monitoring and configuration operations.

6. Can the SR3B261FU retain user programs after power loss?
Yes, the smart relay includes non-volatile memory backup capability to preserve application programs during power interruptions.

7. Can the SR3B261FU be expanded with additional modules?
Yes, the modular Zelio Logic architecture supports compatible expansion modules to increase system functionality.

8. What software is used to program the SR3B261FU?
The SR3B261FU can be programmed using Schneider Electric Zelio Soft programming software.

9. What type of outputs does the SR3B261FU provide?
The SR3B261FU uses relay outputs designed for switching control loads in industrial automation systems.

10. How does the SR3B261FU improve automation system efficiency?
The SR3B261FU combines programmable logic, expanded I/O capacity, and integrated monitoring functions to simplify control system development and maintenance.

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