Schneider Zelio Logic SR2B121BD Smart Relay

Schneider Zelio Logic SR2B121BD Compact Smart Relay – 12 I/O, 24V DC, with Clock and Display

The Zelio Logic SR2B121BD is a compact and user-friendly smart relay designed by Schneider Electric for simple automation tasks. With 12 digital inputs/outputs, integrated 24V DC power supply, built-in real-time clock, and an LCD display, it’s perfect for applications requiring reliable control with minimal complexity.

Ideal for both beginners and experienced users, this smart relay features simple ladder programming, making it accessible for non-specialists. The included Zelio Soft software offers an intuitive interface that simplifies programming and allows fast commissioning and diagnostics.

Key Features:

• Easy ladder logic programming – No advanced knowledge required

• Discovery package with Zelio Soft – Learn and program quickly

• Built-in EEPROM flash memory – Retains data up to 10 years without power

• Integrated display and navigation buttons – View and diagnose directly on the device

• DIN rail mountable – Compact design for efficient panel space usage

• Reverse polarity protection – Ensures long-term electrical reliability

Specifications:

• Supply Voltage: 24V DC (range: 19.2–30V)

• Inputs/Outputs: 8 digital inputs, 4 digital outputs

• Display: LCD with integrated buttons

• Programming: Ladder logic (up to 240 lines) / FBD (up to 500 blocks)

• Backup Time: Up to 10 years at 25°C

• Cycle Time: 6 to 90 ms

• Mounting Type: DIN rail

• Power Consumption: 3W

• Input Type: 24V DC resistive (4mA input current)

• Counting Frequency: 1 kHz

• Standards Compliance: IEC 61131-2

Whether you’re building a small automation project or adding smart control to your equipment, the Zelio Logic SR2B121BD delivers the simplicity, reliability, and flexibility you need — all from a trusted name in industrial control.