SR2B121FU: Schneider 12 I/O Smart Relay with Clock
| Brand | Schneider |
| Product Type | Programmable Logic Controller (PLC) |
| Product | SR2B121FU |
Schneider 12 I/O Smart Relay with Clock SR2B121FU Technical Specifications:
| Specification | Value |
|---|---|
| Cycle time | 6…90 ms |
| Isolation voltage | 1780 V |
| Supply voltage limits | 85…264 V |
| Discrete input frequency | 47...53 Hz57...63 Hz |
| Maximum supply current | 30 mA at 240 V (without extension)80 mA at 100 V (without extension) |
| Electrical durability | AC-12: 500000 cycles at 230 V, 1.5 A for relay output conforming to IEC 60947-5-1AC-15: 500000 cycles at 230 V, 0.9 A for relay output conforming to IEC 60947-5-1DC-12: 500000 cycles at 24 V, 1.5 A for relay output conforming to IEC 60947-5-1DC-13: 500000 cycles at 24 V, 0.6 A for relay output conforming to IEC 60947-5-1 |
| Power consumption in VA | 7 VA without extension |
| Output voltage limits | 5...30 V DC (relay output)24...250 V AC |
| Switching capacity in mA | >= 10 mA at 12 V (relay output) |
| Product or component type | Compact smart relay |
| Counting Frequency | - |
| Protection type | Against inversion of terminals (control instructions not executed) |
| [Us] rated supply voltage | 100...240 V AC |
| Input impedance | 350 kOhm for discrete input |
| Discrete input current | 0.6 mA |
| Operating rate in Hz | 0.1 Hz (at Ie) for relay output10 Hz (no load) for relay output |
| Connections - terminals | Screw terminals, 1 x 0.2...1 x 2.5 mm² (AWG 25...AWG 14) semi-solidScrew terminals, 1 x 0.2...1 x 2.5 mm² (AWG 25...AWG 14) solidScrew terminals, 1 x 0.25...1 x 2.5 mm² (AWG 24...AWG 14) flexible with cable endScrew terminals, 2 x 0.2...2 x 1.5 mm² (AWG 24...AWG 16) solidScrew terminals, 2 x 0.25...2 x 0.75 mm² (AWG 24...AWG 18) flexible with cable end |
| Discrete input type | - |
| Range of product | Zelio Logic |
| Overvoltage category | III conforming to IEC 60664-1 |
| Current state 1 guaranteed | >= 0.17 mA (discrete input) |
| Number of outputs | 4 relay |
| Reverse polarity protection | - |
| Ambient air temperature for operation | -20…40 °C in non-ventilated enclosure conforming to IEC 60068-2-1 and IEC 60068-2-2-20…55 °C conforming to IEC 60068-2-1 and IEC 60068-2-2 |
| Power dissipation in W | - |
| Output thermal current | 8 A for all 4 outputs for relay output |
| Supply frequency | 50/60 Hz |
| Operating altitude | 2000 m |
| Input compatibility | - |
| Net weight | 0.25 kg |
| Discrete input voltage | 100...240 V AC |
| Tightening torque | 0.5 N.m |
The Schneider SR2B121FU offers a rated supply voltage of 100–240V AC with a broad operating range from 85V to 264V, making it suitable for global voltage conditions. Its 12 I/O configuration and integrated real-time clock enable scheduled automation tasks, ideal for lighting control, pump cycling, and energy-saving operations. The smart relay consumes 7 VA without extension and supports 4 relay outputs with a combined thermal current of 8A.
It delivers an output voltage range of 5–30V DC and 24–250V AC, with a switching capacity of ≥10 mA at 12V. Built for precision, the SR2B121FU operates with a cycle time of 6 to 90 ms, and an input impedance of 350 kΩ supporting discrete AC input signals between 100 to 240V. It features an isolation voltage of 1780V and withstands operating temperatures from -20°C to +55°C. Its electrical durability is rated at 500,000 cycles per relay output under IEC 60947-5-1 conditions. The smart relay is designed for altitudes up to 2000 meters and includes protection against terminal inversion, ensuring safety and longevity in industrial automation environments.
The SR2B121FU Smart Relay is ideal for automated lighting systems, water pump sequencing, basic building management, and standalone industrial automation tasks. With 12 input/output channels and a built-in clock, it helps users implement time-based operations without external timers or controllers.
Electricians and maintenance engineers can use the SR2B121FU to easily replace traditional relay logic circuits. The relay’s screw terminal design and compact footprint simplify installation in control cabinets. Junior engineers and students benefit from its intuitive logic programming and real-world application for building reliable industrial control sequences.
Backed by Schneider Electric’s Zelio Logic ecosystem, the SR2B121FU offers proven durability, global compliance, and unmatched versatility for small-scale automation. For ladder logic diagrams, installation manuals, or complete configuration tools, access the official SR2B121FU datasheet or contact IndMALL for expert support and exclusive pricing.
