The Schneider Electric SR2B201B is a Zelio Logic compact programmable relay offering 20 I/O for small machine and building automation. Powered by 24 V AC, it combines 12 digital inputs and 8 relay outputs with an integrated real-time clock and built-in display for local programming and monitoring.

Technical specifications:

• Commercial reference: SR2B201B
• Manufacturer: Schneider Electric
• EAN: 3389110549713
• Series / range: Zelio Logic
• Product type: Compact programmable relay
• Rated supply voltage: 24 V AC
• Supply voltage range: 20.4…28.8 V
• Supply frequency: 50/60 Hz
• Maximum supply current: 233 mA (without extension)
• Power consumption: 6 VA (without extension)
• Digital inputs: 12, rated 24 V AC, 4.4 mA
• Analog inputs: 0
• Relay outputs: 8 x NO contact, 8 A thermal current
• Output voltage range: 5…30 V DC / 24…250 V AC
• Relay electrical endurance: 500,000 cycles (AC-12: 230 V, 1.5 A)
• Relay mechanical endurance: 10,000,000 cycles
• Programming: Ladder up to 240 lines / FBD up to 500 blocks
• Cycle time: 6…90 ms
• Memory retention: 10 years at 25C
• Clock drift: 12 min/year at 0…55C
• Rated impulse withstand voltage [Uimp]: 4 kV (IEC 60947-1 / IEC 60664-1)
• Isolation voltage: 1780 V
• Connection: Screw terminals, 0.2…2.5 mm (AWG 25…AWG 14)
• Tightening torque: 0.5 N.m
• Overvoltage category: III (IEC 60664-1)
• IP rating: IP20 (connection block) / IP40 (front panel) – IEC 60529
• Operating temperature: -20…55C
• Storage temperature: -40…70C
• Relative humidity: 95% without condensation
• Maximum operating altitude: 2000 m
• Pollution degree: 2 (IEC 61131-2)
• Certifications: GL, UL, CSA, C-Tick, GOST
• Weight: 0.38 kg

Features and benefits:

• Built-in display and real-time clock enable local parameter setting and time-based programs without a PC
• Supports both Ladder (240 lines) and FBD (500 blocks) programming for flexible logic development
• 8 relay outputs with NO contacts rated at 8 A, compatible with AC (24…250 V) and DC (5…30 V) loads
• Protection against connection inversion prevents instruction execution on incorrect wiring
• 10-year program memory retention at 25C ensures data is preserved during extended power outages

Applications:

• Small machine and equipment automation in light industrial environments
• Building automation for lighting control, HVAC switching, and access management
• Pump and motor start/stop sequences with time-based or logic-triggered control

Compliant with IEC 61131-2, IEC 61000-6-2, IEC 61000-6-3, IEC 61000-6-4, IEC 60947-1, and IEC 60664-1. Part of the Schneider Electric Zelio Logic range.

Also known as: Schneider SR2B201B, Schneider Electric SR2B201B, Zelio Logic smart relay 20 I/O.