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Schneider Electric SR2B201B

SR2B201B Zelio Logic Smart Relay, 24 V AC, Clock

MPNSR2B201B
Active

Schneider Electric Zelio Logic compact smart relay, SR2B201B, 24 V AC, 12 discrete inputs, relay outputs, built-in display, real-time clock with battery backup.

$113.03Ref. price · indicative, final on quote
Schneider Electric SR2B201B datasheet (PDF)
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MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

SR2B201B key specifications
ParameterValue
Protection typeAgainst inversion of terminals (control instructions not executed)
Range of productZelio Logic
Product or component typeCompact smart relay
Isolation voltage1780 V
Supply voltage limits20.4...28.8 V
Discrete input voltage24 V AC
Supply voltage24 V AC
Voltage state 0 guaranteed= 2 mA discrete input)
Voltage state 1 guaranteed>= 14 V discrete input
[Uimp] rated impulse withstand voltage4 kV EN/IEC 60947-1 and EN/IEC 60664-1
Discrete input current4.4 mA
Maximum supply current233 mA without extension)

All specifications

SR2B201B additional specifications
ParameterValue
Current state 0 guaranteed= 10 mA 12 V relay output)
Power consumption in6 VA without extension
Supply frequency50/60 Hz
Operating rate in0.1 Hz at Ie)relay output 10 Hz no load)relay output
Discrete input frequency57...63 Hz 47...53 Hz
IP degree of protectionIP20 IEC 60529 terminal block) IP40 IEC 60529 front panel)
Connections - terminalsScrew terminals, 1 x 0.2...1 x 2.5 mm² AWG 25...AWG 14) semi-solid Screw terminals, 1 x 0.2...1 x 2.5 mm² AWG 25...AWG 14) solid Screw terminals, 1 x 0.25...1 x 2.5 mm² AWG 24...AWG 14) flexible with cable end Screw terminals, 2 x 0.2...2 x 1.5 mm² AWG 24...AWG 16) solid Screw terminals, 2 x 0.25...2 x 0.75 mm² AWG 24...AWG 18) flexible with cable end
Response time50 ms ladder from state 0 to state 1)discrete input 50 ms ladder from state 1 to state 0)discrete input 50...255 ms FBD from state 0 to state 1)discrete input 50...255 ms FBD from state 1 to state 0)discrete input 10 ms from state 0 to state 1)relay output 5 ms from state 1 to state 0)relay output
Pollution degree2 IEC 61131-2
Relative humidity95 % without condensation or dripping water
Operating altitude6561.68 ft (2000 m)
Maximum altitude transport10000 ft (3048 m)
Mechanical durability10000000 cycles relay output
StandardsIEC 61000-4-4 level 3 IEC 61000-4-3 IEC 60068-2-27 Ea IEC 61000-4-11 IEC 61000-4-5 IEC 61000-4-12 IEC 61000-4-2 level 3 IEC 60068-2-6 Fc IEC 61000-4-6 level 3
ClockWith
ChecksProgram memory on each power up
CategoryUS1000I22378
Cycle time6...90 ms
Backup time10 years 77 °F (25 °C)
Clock drift12 min/year 32...131 °F (0...55 °C) 6 s/month 77 °F (25 °C)
Local displayWith
Tightening torque4.4 lbf.in (0.5 N.m)
Overvoltage categoryIII conforming to IEC 60664-1
Discrete input number12
Immunity to microbreaks10 ms repeated 20 times
Environmental characteristicEMC directive conforming to IEC 61000-6-2 EMC directive conforming to IEC 61000-6-3 EMC directive conforming to IEC 61000-6-4 EMC directive conforming to IEC 61131-2 zone B Low voltage directive conforming to IEC 61131-2
Disturbance radiated (conducted)Class B EN 55022-11 group 1
Number or control scheme lines0...240 ladder 0...500 FBD
Ambient air temperature for storage-40...158 °F (-40...70 °C)
Ambient air temperature for operation-4...104 °F (-20...40 °C) in non-ventilated enclosure IEC 60068-2-1 and IEC 60068-2-2 -4...131 °F (-20...55 °C) IEC 60068-2-1 and IEC 60068-2-2

Product details

The Schneider SR2B201B is a compact smart relay from the Zelio Logic series, designed for standalone logic control in small automation cells. It includes a real-time clock (battery-backed for 10 years at 25 °C) and performs a program memory check on each power-up.

IP20 on the terminal block, IP40 on the front panel—enough for a ventilated enclosure. Mounting to DIN rail or panel, tighten to 0.5 N·m. The unit's immunity to microbreaks (10 ms repeated 20 times) and compliance with IEC 61000-4-2/3/4/5/6/11/12 level 3 mean it holds normal operation through typical industrial line disturbances. Conducted and radiated emissions meet EN 55022 Class B, so it's suitable for both industrial and residential zones.

Frequently asked questions

Does the SR2B201B include a real-time clock?

Yes, it has a built-in real-time clock with a battery backup time of 10 years at 25 °C. Clock drift is 6 s/month at 25 °C and 12 min/year over 0–55 °C.

What program memory self-test does it perform?

The SR2B201B checks program memory on each power-up to ensure integrity before executing the logic.

What compliance standards does the SR2B201B meet?

It complies with IEC 61000-4-2/3/4/5/6/11/12 level 3, IEC 60068-2-6/27, IEC 61131-2, and EN 55022 Class B for EMC. It also meets low-voltage directive requirements per IEC 61131-2.

MPN
SR2B201B