Schneider Electric Zelio Logic SR3B261FU Smart Relay (100-240V AC, 26 I/O)

Schneider Electric Zelio Logic SR3B261FU Smart Relay (100-240V AC, 26 I/O)

Product Description

The Schneider Electric (formerly Telemecanique) Zelio Logic SR3B261FU is a compact, highly reliable programmable smart relay designed for the automation of small-scale control systems and localized industrial processes. Serving as an ideal alternative to bulky conventional relay logic, timers, and counters, this modular controller significantly reduces electrical panel space, simplifies wiring, and lowers overall system costs.

The unit features a built-in backlit liquid crystal display (LCD) and navigational buttons, enabling maintenance personnel to perform on-site configuration, monitor channel states, and adjust parameters directly without needing a PC. For advanced logic development, it utilizes the free, intuitive Zelio Soft 2 software, supporting both LADDER (relay ladder logic) and FBD (functional block diagram) programming languages.

Technical Specifications

• Manufacturer: Schneider Electric (Telemecanique product line)

• Model / Part Number: SR3B261FU

• Supply Voltage: 100...240 V AC, 50/60 Hz

• Supply Voltage Limits: 85...264 V AC

• Power Consumption: 10.7 VA

• Total Number of Channels (I/O): 26

• Discrete Inputs: 16 channels (100...240 V AC)

• Output Type: 10 channels (Relay outputs with normally open NO contacts)

• Operating Current (Outputs Q1...Q8): 8 A per channel

• Operating Current (Outputs Q9...QA): 5 A per channel

• Switching Capacity: Up to 240 V AC / 24 V DC

• Integrated Display: Backlit LCD screen (4 lines, 18 characters each)

• Real-Time Clock (RTC): Built-in, with a lithium battery backup (up to 10-year service life)

• Mounting Options: 35 mm standard DIN rail or panel mounting via screw lugs

• Ingress Protection Rating: IP20 for terminal blocks, IP40 for the front panel

• Certifications: CE, UL, CSA, C-Tick, IEC 61131-2

Applications

The Zelio Logic SR3B261FU smart relay is widely deployed in commercial, residential, and industrial automation. In building management and HVAC systems, it efficiently controls indoor/outdoor lighting cycles, illuminated signage, automated ventilation, and air conditioning units. It is also an excellent solution for pump control groups (water supply, drainage, irrigation), automated gates, roller shutters, blinds, and traffic barriers. In manufacturing, the relay provides automation for small conveyer lines, mixers, dispensing systems, packaging machines, and localized assembly benches.