{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SR3B261FUSP002","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"SR3B261FUSP002","canonicalUrl":"https://aoctrl.com/schneider/SR3B261FUSP002","factsUrl":"https://aoctrl.com/api/mcp/products/SR3B261FUSP002","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Zelio Logic modular smart relay, SR3B261FUSP002, 16 discrete AC inputs (100–240 V), built-in real-time clock, cycle time 6…90 ms.","salesMarkdown":"## Key Features That Matter for Fit The SR3B261FUSP002: Built-in real-time clock with 10-year backup at 25 °C, drift of 6 s/month at 25 °C (12 min/year over 0…55 °C). That means it holds time through power loss and is usable for time-controlled sequences without an external RTC module. Checks program memory on each power up — no silent corruption when the line bounces. If the program is bad, it won't run, which beats a mystery fault later. 16 discrete inputs, 100…240 V AC. Supply voltage 85…264 V AC. Input current 0.6 mA. Relay outputs: mechanical durability 10 million cycles. Maximum switching rate 0.1 Hz at rated current, 10 Hz unloaded. That's fine for valve or contactor coils; don't plan on fast pulse trains. ## Where It Fits – And Where It Doesn't This is the 16-input, relay-output workhorse for standalone or networked small machines. The cycle time runs 6…90 ms — ladder runs faster than FBD. Good for bin-fill, pump sequencing, or lighting schedules. Not a motion controller; you want a PLC for servo loops.","metaTitle":"Schneider Zelio Logic SR3B261FUSP002 Smart Relay, 16 AC Inpu","metaDescription":"Schneider Zelio Logic modular smart relay SR3B261FUSP002. Current production. Real-time clock, program memory check on power up. 16 discrete AC inputs 100-240V. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Digital Output Modules"],"specifications":{"Clock":"With","Checks":"Program memory on each power up","Standards":"EN/IEC 61000-4-3 EN/IEC 61000-4-6 level 3 EN/IEC 60068-2-27 Ea EN/IEC 61000-4-4 level 3 EN/IEC 61000-4-5 EN/IEC 61000-4-12 EN/IEC 60068-2-6 Fc EN/IEC 61000-4-2 level 3 EN/IEC 61000-4-11","Cycle time":"6...90 ms","Backup time":"10 years at 25 °C","Clock drift":"12 min/year at 0...55 °C 6 s/month at 25 °C","Local display":"With","Response time":"50 ms with ladder programming (from state 0 to state 1) for discrete input 50 ms with ladder programming (from state 1 to state 0) for discrete input 50...255 ms with FBD programming (from state 0 to state 1) for discrete input 50...255 ms with FBD programming (from state 1 to state 0) for discrete input 10 ms (from state 0 to state 1) for relay output 5 ms (from state 1 to state 0) for relay output","Protection type":"Against inversion of terminals (control instructions not executed)","lifecycle_stage":"current","Pollution degree":"2 conforming to EN/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":"0.5 N.m","Operating altitude":"2000 m","Operating rate in Hz":"0.1 Hz (at Ie) for relay output 10 Hz (no load) for relay output","Overvoltage category":"III conforming to EN/IEC 60664-1","Discrete input number":"16","Mechanical durability":"10000000 cycles for relay output","Supply voltage limits":"85...264 V","Discrete input current":"0.6 mA","Discrete input voltage":"100...240 V AC","Maximum supply current":"100 mA at 100 V (without extension) 50 mA at 240 V (without extension) 60 mA at 240 V (with extensions) 80 mA at 100 V (with extensions)","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 (terminal block) conforming to IEC 60529 IP40 (front panel) conforming to IEC 60529","Immunity to microbreaks":"10 ms","Power consumption in VA":"12 VA without extension 17 VA with extensions","Discrete input frequency":"57...63 Hz 47...53 Hz","Product or component type":"Modular smart relay","[Us] rated supply voltage":"100...240 V","Current state 0 guaranteed":"= 10 mA at 12 V (relay output)","Maximum altitude transport":"3048 m","Voltage state 0 guaranteed":"= 0.17 mA (discrete input)","Voltage state 1 guaranteed":">= 79 V for discrete input","Environmental characteristic":"EMC directive conforming to EN/IEC 61000-6-2 EMC directive conforming to EN/IEC 61000-6-3 EMC directive conforming to EN/IEC 61000-6-4 EMC directive conforming to EN/IEC 61131-2 zone B Low voltage directive conforming to EN/IEC 61131-2","Disturbance radiated/conducted":"Class B conforming to EN 55022-11 group 1","Number or control scheme lines":"0...500 with FBD programming 0...240 with ladder programming","Ambient air temperature for storage":"-40...70 °C","Ambient air temperature for operation":"-20...40 °C in non-ventilated enclosure conforming to IEC 60068-2-1 and IEC 60068-2-2 -20...55 °C conforming to IEC 60068-2-1 and IEC 60068-2-2","[Uimp] rated impulse withstand voltage":"4 kV conforming to EN/IEC 60947-1 and EN/IEC 60664-1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://www.se.com/be/en/product/SR3B261FUSP002/modular-smart-relay-zelio-logic-26-i-o-100-240-vac-clock-display/","alternativesUrl":"https://aoctrl.com/api/mcp/products/SR3B261FUSP002/alternatives.json"},"ai":{"faq":[{"question":"What is the real-time clock specification?","answer":"The SR3B261FUSP002 includes a built-in clock with a backup time of 10 years at 25 °C. Clock drift is 6 seconds per month at 25 °C, or 12 minutes per year across the full 0…55 °C operating range."},{"question":"Does it check program memory on startup?","answer":"Yes, it performs a program memory check on each power up. This ensures the stored program is valid before the relay begins operating."},{"question":"What compliance documentation is available?","answer":"The unit meets EN/IEC 61000-6-2 and EN/IEC 61000-6-3 (EMC), EN/IEC 61131-2 (low voltage directive), and is marked for environmental conformity with RoHS and REACH via Schneider's declaration. Specific certificates can be requested with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/SR3B261FUSP002","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/SR3B261FUSP002 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}