{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SR2E121FU","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"SR2E121FU","canonicalUrl":"https://aoctrl.com/schneider/SR2E121FU","factsUrl":"https://aoctrl.com/api/mcp/products/SR2E121FU","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Zelio Logic SR2E121FU compact smart relay, 100...240 V AC supply, 8 discrete inputs, relay outputs, real-time clock with 10-year backup.","salesMarkdown":"The SR2E121FU is a compact smart relay from Schneider's Zelio Logic range. Out here in the grease you'll see these tucked into panels running pumps, fans, and simple conveyor interlocks. It packs 8 discrete inputs rated for 100...240 V AC, so you can wire it straight to line-voltage pushbuttons or limit switches without a step-down transformer. Outputs are relay contacts good for 10 million mechanical cycles — the kind of life you expect from a panel that's running every shift. ## Clock and timing The built-in real-time clock holds its time for 10 years at 25 °C on the internal backup — so after a power outage you don't come back to a scrambled schedule. Drift runs about 12 minutes per year over the full 0...55 °C operating range, or 6 seconds per month at 25 °C. That's tight enough for daily on/off schedules and basic time-of-day logic. The relay also checks program memory on each power-up, so corruption from a brownout doesn't slip through. ## Ruggedness for the plant floor This smart relay is built to IEC 61131-2 and passes IEC 61000-4-2/4/5/6 Level 3 EMC tests, so it'll sit right next to a VFD or contactor without locking up. Pollution degree 2 and IP20 on the terminals (IP40 front) mean it's right at home in a standard enclosure out in the grease. Cycle time runs 6 to 90 ms depending on the program size — adequate for relay logic and basic process control.","metaTitle":"Schneider SR2E121FU Zelio Logic Smart Relay, 100-240 VAC, 8","metaDescription":"Active-production Zelio Logic smart relay with real-time clock and 8 AC inputs. Compliant with IEC 61131-2. Sourced to order. RFQ for availability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":[],"specifications":{"Clock":"With","Checks":"Program memory on each power up","Category":"US1000I22378","Standards":"IEC 60068-2-6 Fc IEC 61000-4-11 IEC 61000-4-4 level 3 IEC 61000-4-2 level 3 IEC 61000-4-12 IEC 61000-4-6 level 3 IEC 61000-4-5 IEC 60068-2-27 Ea IEC 61000-4-3","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":"Without","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":"8","Mechanical durability":"10000000 cycles relay output","Nbr. of units in pkg.":"1","Supply voltage limits":"85...264 V","Discrete input current":"0.6 mA","Discrete input voltage":"100...240 V AC","Maximum supply current":"30 mA 240 V without extension) 80 mA 100 V 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","Power consumption in VA":"7 VA without extension","Discrete input frequency":"57...63 Hz 47...53 Hz","Product or Component Type":"Compact smart relay","[Us] rated supply voltage":"100...240 V AC","Current state 0 guaranteed":"= 10 mA 12 V relay output)","Maximum altitude transport":"10000 ft (3048 m)","Voltage state 0 guaranteed":"= 0.17 mA discrete input)","Voltage state 1 guaranteed":">= 79 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":"$64.77","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ebae4c26daa7542f33b002ffac66db32.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/SR2E121FU/alternatives.json"},"ai":{"faq":[{"question":"What is the clock feature?","answer":"The SR2E121FU includes a real-time clock with 10-year backup at 25°C. Clock drift is 12 minutes per year at 0-55°C and 6 seconds per month at 25°C."},{"question":"What compliance standards does it meet?","answer":"It conforms to IEC 61131-2, IEC 61000-6-2/3/4, and passes EMC tests at Level 3 for immunity standards including IEC 61000-4-2, IEC 61000-4-4, IEC 61000-4-5, and IEC 61000-4-6."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/SR2E121FU","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/SR2E121FU 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}}