Schneider SR3B261BD Smart Relay Module

Product Overview

The Schneider SR3B261BD is a Zelio Logic SR3 modular smart relay designed for small-scale industrial automation and control applications. It integrates digital inputs, analog inputs, relay outputs, LCD display, and programmable logic functions in a compact DIN rail-mounted controller.

This smart relay is commonly used as a simple PLC replacement for machine control, building automation, pump control, lighting control, and monitoring systems.

Main Specifications

• Manufacturer: Schneider Electric
• Model: SR3B261BD
• Series: Zelio Logic SR3
• Product Type:
  • Smart Relay Module
  • Programmable Logic Controller (Compact PLC)
  • Modular Control Relay
• Supply Voltage: 24 V DC
• I/O Points: 26 I/O
• Display: Built-in LCD display
• Output Type: Relay outputs
• Programming:
  • Ladder Logic
  • Function Block Diagram (FBD)

Technical Specifications

Power Supply

• Rated Supply Voltage: 24 V DC
• Voltage Range: 19.2–30 V DC
• Current Consumption:
  • Approx. 190 mA (without extension)
  • Approx. 300 mA (with extensions)
• Reverse Polarity Protection: Yes

Input Specifications

• Digital Inputs: 16 channels
• Input Voltage: 24 V DC
• Input Type: IEC 61131-2 Type 1 compatible
• Input Current: Approx. 4 mA
• High-Speed Counting Frequency: Up to 1 kHz
• Analog Inputs: 6 channels
• Analog Input Range:
  • 0–10 V
  • 0–24 V
• Analog Resolution: 8 bits

Output Specifications

• Relay Outputs: 10 channels
• Output Type: Electromechanical relay
• Contact Capacity: Suitable for general industrial control loads

Programming Functions

Supports:

• Ladder programming
• Function Block Diagram (FBD)
• Timers
• Counters
• Comparators
• Clock functions
• Scheduling functions
• Logic operations
• Analog processing

Programming software:

• Schneider Zelio Soft

Mechanical Specifications

• Mounting:
  • DIN rail mounting
  • Panel mounting
• Display:
  • Integrated LCD screen
• Dimensions:
  • Approx. 124.6 × 107.6 × 59.5 mm
• Operating Temperature:
  • -20 °C to +55 °C

Features & Advantages

• Original Schneider Zelio Logic smart relay
• Compact design with integrated display
• Easy programming without advanced PLC knowledge
• Combines relay control and PLC functions
• Supports digital and analog signal processing
• Suitable for standalone automation applications
• Expandable with additional modules
• Reliable DIN rail installation

Applications

Used in:

• Industrial machine control
• Pump and motor control
• Building automation
• Lighting control systems
• HVAC systems
• Small production equipment
• Access control systems

Typical applications:

• Automatic door control
• Water level control
• Conveyor control
• Time-based switching systems
• Small automated machines