Product Name:

Schneider SR3B261BD – Modular Smart Relay
Series: Zelio Logic SR3
Inputs/Outputs: 26 I/O
Power Supply: 24V DC
Features: Built-in Display and Real-Time Clock (RTC)

1. General Description:

The Schneider SR3B261BD is a high-capacity modular smart relay from the Zelio Logic SR3 series. It is designed for advanced yet compact automation tasks, offering 26 inputs/outputs, 24V DC power supply, a built-in display, and an integrated real-time clock for time-based operations.

This relay is programmable, user-friendly, and ideal for replacing complex relay-based systems or small PLCs.

2. Key Features:

3. Inputs and Outputs Configuration:

• Inputs:
  Typically 16 digital inputs, accepting 24V DC signals from sensors, push buttons, or control switches.

• Outputs:
  10 relay outputs, each capable of switching loads such as contactors, indicator lamps, or small motors.

(Note: Actual input/output split may vary slightly. Confirm with wiring diagram if exact count needed.)

4. Functionality:

• Logic Control:
  Ideal for small to medium automation tasks with customizable logic such as:

  • Start/stop sequences

  • Timing and delay functions

  • Alarm control

  • Interlocking and toggling

  • Count-based actions

• Real-Time Clock (RTC):
  Enables daily/weekly scheduling (e.g. turn system ON at 8:00 AM, OFF at 5:00 PM). Useful for lighting, HVAC, and time-based process control.

• Onboard Display:
  LCD screen shows:

  • Live status of I/Os

  • System parameters

  • Error messages and diagnostics

  • Basic programming and manual controls

• Programming Options:

  • Zelio Soft (PC software – ladder diagram or function block logic)

  • On-device buttons for simple programming/editing

5. Applications:

This model is well-suited for:

• Industrial automation (small machines, conveyors)

• Building management systems (lighting, ventilation, gates)

• Irrigation and pump control systems

• Energy-saving and access systems

• Water treatment or tank level control

• Any automation task requiring many I/Os but not a full PLC

6. Advantages:

• Compact but powerful – 26 I/Os in one device

• Integrated clock – for scheduled control without extra hardware

• Relay outputs – for direct load control

• Modular and expandable – can be combined with extension modules

• User-friendly programming – no need for deep PLC expertise

• Clear front display – for real-time operation visibility

7. Summary:

The Schneider SR3B261BD is a versatile and modular smart relay with 26 I/Os, 24V DC supply, relay outputs, built-in real-time clock, and an LCD display. It is ideal for small-to-medium automation projects requiring time-based logic, multiple inputs/outputs, and reliable control, all in a compact and easy-to-program format.