{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TM251MDESE","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"TM251MDESE","canonicalUrl":"https://aoctrl.com/schneider/TM251MDESE","factsUrl":"https://aoctrl.com/api/mcp/products/TM251MDESE","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Modicon M251 processor module, TM251MDESE, 24 V DC, 64 MB RAM, dual Ethernet, real-time clock, battery backup, 3.5 x 2.1 x 3.5 in.","salesMarkdown":"The Modicon M251 TM251MDESE is a 24 V DC processor module with dual Ethernet for Modbus TCP and OPC UA. It measures 3.5 x 2.1 x 3.5 in and draws up to 45 W. ## Integration Notes The processor mounts on a TH35-15 or TH35-7.5 DIN rail, or on a plate using a fixing kit. The power supply connects via a removable screw terminal block (3.81 mm pitch). Up to 16 GB SD card can be inserted for program storage or data logging. The 128 MB built-in flash backs up user programs, and system memory is 64 MB RAM. The module includes eight status LEDs (PWR, RUN, ERR, I/O, SD, BAT, SL, TM4 bus fault). For communication service, Modbus TCP client/server and NTP client are built in; OPC UA server enables MES/SCADA connectivity.","metaTitle":"Schneider TM251MDESE Modicon M251 Processor Module","metaDescription":"Schneider Modicon M251 processor module, 24 V DC, 64 MB RAM, dual Ethernet, RTC, SD card slot. Active production. UL 508, CSA, CE. Order to RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":[],"specifications":{"Depth":"3.5 in (90 mm)","Width":"2.1 in (54 mm)","Height":"3.5 in (90 mm)","Marking":"CE","Category":"US1PC1522555","Standards":"ANSI/ISA 12-12-01 CSA C22.2 No 142 CSA C22.2 No 213 EN/IEC 61131-2 UL 508","Backup time":"2 years 77 °F (25 °C)","Clock drift":"<= 60 s/month 14...122 °F (-10...50 °C)","Battery type":"BR2032 lithium non-rechargeable 4 year(s)","Port Ethernet":"Ethernet 10BASE-T/100BASE-TX - 2 copper cable","Data backed up":"128 MB built-in flash memory backup of user programs","Realtime clock":"With","Memory capacity":"64 MB system memory RAM","Surge withstand":"1 kV shielded cable common mode EN/IEC 61000-4-5 1 kV power lines common mode EN/IEC 61000-4-5 0.5 kV power lines differential mode EN/IEC 61000-4-5","lifecycle_stage":"current","Local signalling":"1 LED (green) for PWR 1 LED (green) for RUN 1 LED (red) for module error (ERR) 1 LED (red) for I/O error (I/O) 1 LED (green) for SD card access (SD) 1 LED (red) for BAT 1 LED (green) for SL 1 LED (red) for bus fault on TM4 (TM4)","Mounting support":"Top hat type TH35-15 rail IEC 60715 Top hat type TH35-7.5 rail IEC 60715 plate or panel with fixing kit","Pollution degree":"2","Range of Product":"Modicon M251","Shock resistance":"15 gn 11 ms","Storage altitude":"0...9842.5 ft (0...3000 m)","Relative humidity":"10...95 %, without condensation in operation) 10...95 %, without condensation in storage)","Operating altitude":"0...6561.68 ft (0...2000 m)","Vibration resistance":"3.5 mm 5...8.4 Hz symmetrical rail 1 gn 8.4...150 Hz symmetrical rail 3 gn 8.7...150 Hz panel mounting","Communication service":"Modbus TCP client Modbus TCP server OPC UA server NTP client","Electrical connection":"removable screw terminal block power supply pitch 3.81 mm)","Nbr. of units in pkg.":"1","Supply voltage limits":"19.2...28.8 V","Data storage equipment":"<= 16 GB SD card optional)","Power consumption in W":"45 W with max number of I/O expansion module)","IP degree of protection":"IP20 with protective cover in place","Immunity to microbreaks":"10 ms","Electromagnetic emission":"Conducted emissions 120...69 dBµV/m QP power lines)10...150 kHz IEC 61000-6-4 Conducted emissions 63 dBμV/m QP power lines)1.5...30 MHz IEC 61000-6-4 Radiated emissions 40 dBμV/m QP class A 10 m)30...230 MHz IEC 61000-6-4 Conducted emissions 79...63 dBμV/m QP power lines)150...1500 kHz IEC 61000-6-4 Radiated emissions 47 dBμV/m QP class A 10 m)230...1000 MHz IEC 61000-6-4","Product or Component Type":"Processor module","[Us] rated supply voltage":"24 V DC","Integrated connection type":"USB port mini B USB 2.0 Non isolated serial link serial RJ45 RS232/RS485 Dual-port Ethernet 1 2 RJ45 Ethernet port Ethernet 2 RJ45","Resistance to fast transients":"2 kV EN/IEC 61000-4-4 power lines) 1 kV EN/IEC 61000-4-4 Ethernet line) 1 kV EN/IEC 61000-4-4 serial link)","Ambient Air Temperature for Storage":"-40...158 °F (-40...70 °C)","Resistance to conducted disturbances":"10 V 80...1000 MHz EN/IEC 61000-4-3 3 V 1.4 GHz...2 GHz EN/IEC 61000-4-3 1 V 2 GHz...3 GHz EN/IEC 61000-4-3","Resistance to electromagnetic fields":"9.1 V/m (10 V/m) 80 MHz...1 GHz EN/IEC 61000-4-3 2.7 V/m (3 V/m) 1.4 GHz...2 GHz EN/IEC 61000-4-3 0.9 V/m (1 V/m) 2 GHz...3 GHz EN/IEC 61000-4-3","Ambient air temperature for operation":"14...95 °F (-10...35 °C) vertical installation) 14...131 °F (-10...55 °C) horizontal installation)","Resistance to electrostatic discharge":"8 kV in air EN/IEC 61000-4-2 4 kV on contact EN/IEC 61000-4-2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f889afd97551ff15c711da0a1df01dbe.pdf","sourceUrl":"https://www.se.com/au/en/product/TM251MDESE/dpac-module-modicon-m251/","alternativesUrl":"https://aoctrl.com/api/mcp/products/TM251MDESE/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions and panel space requirements?","answer":"The module is 3.5 x 2.1 x 3.5 inches (90 x 54 x 90 mm). It fits on a top-hat TH35 rail or can be plate-mounted."},{"question":"What certifications and standards does it meet?","answer":"It is UL 508 listed, CSA C22.2 No 142 and No 213, EN/IEC 61131-2, ANSI/ISA 12-12-01, and carries CE marking."},{"question":"What are the power supply requirements?","answer":"Rated supply voltage is 24 V DC, with limits 19.2 to 28.8 V. Maximum power consumption is 45 W with full I/O expansion."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/TM251MDESE","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/TM251MDESE 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}}