{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7312-5AC82-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7312-5AC82-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7312-5AC82-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7312-5AC82-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-300 CPU 312, 6ES7312-5AC82-0AB0, 24 V DC, 6 KB integrated RAM, MPI interface, end-of-life stage.","salesMarkdown":"## CPU 312 — panel fit and memory ceiling The Siemens 6ES7312-5AC82-0AB0 is an S7-300 CPU 312 with 6 kbyte integrated RAM (2 K instructions, where 1 instruction averages 3 bytes). It runs on 24 V DC and draws a typical power loss of 9 W including the integrated I/O. The MPI interface is present, supporting S7 communication as server. The CPU fits a single rack (max. 1 rack) and measures 80 mm wide by 125 mm high by 130 mm deep — it occupies one standard S7-300 slot width on the DIN rail. ## Temperature range and environmental limits The lower limit accommodates unheated storage or cold-start conditions; the 60 °C ceiling is typical for enclosed panels without forced cooling — above that, derating applies. ## Lifecycle — end-of-life stage For a BOM freeze or replacement project, confirm the required memory and interface profile — the S7-300 family offers CPUs with larger work memory and PROFINET interfaces that may serve as functional replacements. ## Integrated memory and retentivity The 6 kbyte integrated RAM includes a retentive area of 72 bytes (memory bits, times, counters, data) that holds without battery. The software clock is present; a battery option is not required for retentivity of that 72-byte block. The command set covers binary logic, bracketed operations, arithmetic (fixed and floating point), counting, shifting, rotating, and block calls — sufficient for medium-complexity machine control.","metaTitle":"Siemens 6ES7312-5AC82-0AB0 S7-300 CPU, 6 KB RAM, MPI, EOL","metaDescription":"Siemens 6ES7312-5AC82-0AB0 S7-300 CPU with 6 KB integrated RAM, MPI interface, 24 V DC. End-of-life stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"MPI":"Yes","Max.":"60 °C","Min.":"-25 °C","Depth":"130 mm","Width":"80 mm","Height":"125 mm","Inputs":"64 byte","Number":"64","Preset":"150 ms","STEP 7":"Yes; V5.0 SP1","via CP":"1; CP 342-5","Outputs":"64 byte","As Server":"Yes","Supported":"No","Adjustable":"Yes","Integrated":"6 kbyte; 2 K instructions RAM (integrated); 1 instruction means 3 bytes on average","Size, max.":"6 kbyte","Command set":"Binary logic operations, bracketed operations, result allocation, saving, counting, loading, transferring, comparing, shifting, rotating, complementation, calling blocks, fixed point arithmetic, floating point arithmetic, jump functions","Description":"see instruction list","Lower Limit":"1 ms","Racks, max.":"1","Upper Limit":"6 000 ms","Number, max.":"128 byte","2-Wire Sensor":"Yes","For Signal \"0\"":"-3 to +5V","For Signal \"1\"":"+15 to +30 V","Nesting levels":"8","Shielded, Max.":"1 000 m","Software clock":"Yes","Of Which Static":"4","Weight, approx.":"450 g","Without Battery":"Yes; 72 bytes: memory bits, times, counters, data","lifecycle_stage":"eol_hot","Of Which Dynamic":"4","Power loss, typ.":"9 W; incl. integrated inputs/outputs","Rated value (DC)":"24 V","S7 communication":"Yes","Unshielded, Max.":"600 m","Number of counters":"1; 1 counter with 4 inputs, counter frequency 10 kHz; 32 bit (incl. sign); 2 direction-dep. comparators","Per Priority Class":"8","Program processing":"free cycle (OB 1), interrupt-controlled (OB 40), startup (OB 100)","Retentivity preset":"MB 0 to MB 15","up to 40 °C, max.":"3 A","up to 60 °C, max.":"3 A","At \"0\" To \"1\", Max.":"50 µs","PG/OP communication":"Yes","For Signal \"1\", Min.":"L+ (-0.8 V)","For Signal \"1\", Typ.":"7 mA; Min. 2 mA","Inrush current, typ.":"8 A","Program organization":"Linear, structured","integrated RAM, max.":"20 kbyte","Frequency measurement":"Yes; 1 channel to max. 10 kHz; measurement times 0.1 s, 1 s, 10 s; meas. procedure: calculation of pulse number per meas. time","Number of nodes, max.":"32; PG/PC, OP, additional S7-300/400, C7; max. 4 static and 2 dynamic connections per CPU","Retentivity available":"Yes; MB 0 to MB 127","Modules per rack, max.":"8","S7 basic communication":"Yes","System functions (SFC)":"Interrupt and error processing, copy data, clock functions, diagnostic functions, module parameterization, operating mode transitions","Transmission rate, max.":"187.5 kbit/s; Distance between two neighboring nodes, max. - with 10 repeaters in series: 9100 m; via fiber optic cable: 23.8 km (with 16 star hubs or OLMs)","integrated FEPROM, max.":"20 kbyte","For Bit Operations, Max.":"1.2 µs","For Bit Operations, Typ.":"0.6 µs","Number of digital inputs":"10; of which 4 channels can be used for process alarms or integrated functions","Short-circuit protection":"Yes; Clocked electronically","For Word Operations, Typ.":"2 µs","Global data communication":"Yes","Number of digital outputs":"6","With Inductive Load, Max.":"0.5 Hz","With Resistive Load, Max.":"100 Hz","Address space per module, max.":"128 byte; 128 bytes/128 bytes","Number of expansion units, max.":"0","For Fixed Point Arithmetic, Typ.":"3 µs","Counting frequency (counter) max.":"10 kHz","Current consumption (rated value)":"800 mA; 0.8 A + 0.5 A per fully loaded output","Between The Channels, In Groups Of":"6","For Timer/Counter Operations, Typ.":"15 µs","Of Which Retentive Without Battery":"0 to 576 (M 0.0 to M 71.7, adjustable)","For Floating Point Arithmetic, Typ.":"60 µs","For Signal \"1\" Minimum Load Current":"5 mA","connectable programming devices/PCs":"PGs/PCs with STEP 7 connectable via MPI interface","permissible range, lower limit (DC)":"20.4 V","permissible range, upper limit (DC)":"28.8 V","For Signal \"0\" Residual Current, Max.":"0.5 mA","Between The Channels And Backplane Bus":"No","Limitation of inductive shutdown voltage to":"30 V","User program protection/password protection":"Yes","Number of modules per DP slave interface, max.":"8","Permissible Quiescent Current (2-Wire Sensor), Max.":"1.5 mA","for signal \"1\" permissible range for 0 to 60 °C, max.":"500 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$318.90","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=370310&mlfb=6ES7312-5AC82-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7312-5AC82-0AB0/alternatives.json"},"ai":{"faq":[{"question":"What is the exact replacement for 6ES7312-5AC82-0AB0?","answer":"No official direct replacement is recorded in the lifecycle data. For a functional upgrade, consider S7-300 CPUs with larger work memory and PROFINET interfaces — verify the I/O count and communication profile against your application."},{"question":"Can 6ES7312-5AC82-0AB0 be used in high temperature environments?","answer":"The maximum operating ambient temperature is 60 °C. For enclosures exceeding that, forced cooling or a CPU with a wider temperature range would be needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7312-5AC82-0AB0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/6ES7312-5AC82-0AB0 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}}