{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SR2B201B","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"SR2B201B","canonicalUrl":"https://aoctrl.com/schneider/SR2B201B","factsUrl":"https://aoctrl.com/api/mcp/products/SR2B201B","rawCanonicalId":null},"summary":{"shortDescription":"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.","salesMarkdown":"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.","metaTitle":"SR2B201B Zelio Logic Smart Relay, 24 V AC, Clock","metaDescription":"Schneider SR2B201B compact smart relay, 12 inputs, real-time clock, battery backup 10 years, current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":[],"specifications":{"Clock":"With","Checks":"Program memory on each power up","Category":"US1000I22378","Standards":"IEC 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","Cycle time":"6...90 ms","Backup time":"10 years 77 °F (25 °C)","Clock drift":"12 min/year 32...131 °F (0...55 °C) 6 s/month 77 °F (25 °C)","Local display":"With","Response time":"50 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","Protection Type":"Against inversion of terminals (control instructions not executed)","lifecycle_stage":"current","Pollution degree":"2 IEC 61131-2","Range of Product":"Zelio Logic","Supply frequency":"50/60 Hz","Isolation voltage":"1780 V","Relative Humidity":"95 % without condensation or dripping water","Tightening Torque":"4.4 lbf.in (0.5 N.m)","Operating altitude":"6561.68 ft (2000 m)","Operating rate in Hz":"0.1 Hz at Ie)relay output 10 Hz no load)relay output","Overvoltage category":"III conforming to IEC 60664-1","Discrete input number":"12","Mechanical durability":"10000000 cycles relay output","Nbr. of units in pkg.":"1","Supply voltage limits":"20.4...28.8 V","Discrete input current":"4.4 mA","Discrete input voltage":"24 V AC","Maximum supply current":"233 mA without extension)","Connections - terminals":"Screw 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","IP degree of protection":"IP20 IEC 60529 terminal block) IP40 IEC 60529 front panel)","Immunity to microbreaks":"10 ms repeated 20 times","Power consumption in VA":"6 VA without extension","Discrete input frequency":"57...63 Hz 47...53 Hz","Product or Component Type":"Compact smart relay","[Us] rated supply voltage":"24 V AC","Current state 0 guaranteed":"= 10 mA 12 V relay output)","Maximum altitude transport":"10000 ft (3048 m)","Voltage state 0 guaranteed":"= 2 mA discrete input)","Voltage state 1 guaranteed":">= 14 V discrete input","Environmental characteristic":"EMC 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 lines":"0...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","[Uimp] rated impulse withstand voltage":"4 kV EN/IEC 60947-1 and EN/IEC 60664-1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$113.03","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0ede493899ac900a435a265155f6733d.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/SR2B201B/alternatives.json"},"ai":{"faq":[{"question":"Does the SR2B201B include a real-time clock?","answer":"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."},{"question":"What program memory self-test does it perform?","answer":"The SR2B201B checks program memory on each power-up to ensure integrity before executing the logic."},{"question":"What compliance standards does the SR2B201B meet?","answer":"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."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/SR2B201B","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/SR2B201B when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:21:01.794Z","lastPublished":"2026-09-02T08:21:01.794Z","indexable":true}}