Schneider Electric SR2B121BD Zelio Logic SR2 12 I/O 24 V DC with Display 4 Relay Outputs Logic Module

The Schneider Electric SR2B121BD is a Zelio Logic SR2 compact smart relay with 8 discrete inputs (4 configurable as analogue) and 4 relay outputs rated 8 A each, powered from 24 V DC. Its built-in LCD display and navigation buttons, with a real-time clock, let you program, monitor, and diagnose simple automation tasks directly on the unit.

Technical Specifications

Certifications & Standards

• GL
• CSA
• UL
• GOST
• C-tick
• IEC 61000-4-12
• IEC 61000-4-4
• IEC 61000-4-5
• IEC 61000-4-11
• IEC 61000-4-2
• IEC 60068-2-6 Fc
• IEC 61000-4-6
• IEC 60068-2-27 Ea
• IEC 61000-4-3

Selection Notes

The SR2B121BD is the 24 V DC member of the 12-I/O Zelio Logic SR2 compact range, with a built-in real-time clock for time-based control such as scheduled lighting or pump cycling and 4 of its inputs configurable as 0-10 V analogue channels for simple threshold or setpoint monitoring. Where fewer or more I/O points are needed, the 10-I/O and 20-I/O SR2 variants in the same family cover the range without changing the programming environment.