{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7288-1SR20-0AA1","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7288-1SR20-0AA1","canonicalUrl":"https://aoctrl.com/siemens/6ES7288-1SR20-0AA1","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7288-1SR20-0AA1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-1200 CPU, 6ES7288-1SR20-0AA1, 12 kB program memory, 144-byte I/O image, 4 ms PROFINET update, RS485, PID up to 8 loops, DIN rail mount.","salesMarkdown":"## What this CPU delivers on a high-speed line The Siemens 6ES7288-1SR20-0AA1 is an S7-1200 CPU that packs 12 kbyte of program memory and a 144-byte I/O image (256 bits digital plus 56 words analog each way) into a 90 x 100 x 81 mm DIN-rail footprint. It runs LAD, FBD, or STL, and the minimum PROFINET update time is 4 ms — that 4 ms is the cycle floor for deterministic IO exchange, so it holds takt time on a body-shop weld line where every millisecond counts. The RTC keeps time for 7 days without battery backup, which means a power loss over a long weekend loses the clock; plan for a time-sync at startup if your process timestamps matter. ## IO and fieldbus — what connects where Built-in RS485 runs at up to 187.5 kbps, shielded max 500 m. PROFIBUS is available via a CM DP module, not on-board. PROFINET IO with autocrossing and autonegotiation handles up to 128 bytes input and 128 bytes output per device. The CPU supports both client and server roles. For high-speed counting, six single-phase HSCs are configurable: four at 200 kHz and two at 30 kHz; in A/B phase mode, two at 100 kHz and two at 20 kHz. That covers encoder feedback for conveyor positioning without an extra module. Transformer-isolated power supply with 1500 V AC isolation, accepting 120 V AC or 230 V AC. CE marked. No UL or CSA listing in the record; confirm with your local inspector if the job requires it.","metaTitle":"Siemens 6ES7288-1SR20-0AA1 S7-1200 CPU, 12 kB program, 4 ms","metaDescription":"Siemens 6ES7288-1SR20-0AA1 S7-1200 CPU with 12 kB program memory, 144 byte I/O image, 4 ms PROFINET update, RS485, PID up to 8 loops. DIN rail mount, -40 to 70 °C. CE marked. Sourc","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["DIN Rail Power Supplies"],"specifications":{"FBD":"Yes","LAD":"Yes","RAM":"Yes","STL":"Yes","Max.":"70 °C","Min.":"-40 °C","Type":"Hardware clock, no battery backup","Depth":"81 mm","Flash":"Yes","Width":"90 mm","title":"6ES7288-1SR20-0AA1","Height":"100 mm","Inputs":"144 byte; 256 bit of digital inputs & 56 words of analog inputs","RS 485":"Yes","TCP/IP":"Yes","CE mark":"Yes","Forcing":"Yes","Outputs":"144 byte; 256 bit of digital outputs & 56 words of analog outputs","Present":"Yes; Maintenance free, RTC requires 7 days.","120 V AC":"Yes","230 V AC":"Yes","Isolated":"Yes; Transformer isolated, 1,500V AC","PROFIBUS":"Yes; Via CM DP module","As Client":"Yes","As Server":"Yes","Supported":"Yes","Backup time":"7 d","Memory size":"12 kbyte; Program memory","description":"SIMATIC S7-200 SMART, CPU SR20, CPU, AC/DC/relay, onboard I/O: 12 DI 24 V DC; 8 DQ relay 2A; power supply: AC 85 - 264 V AC at 47-63 Hz, 77 to 138 V DC program/data memory 20 KB","Autocrossing":"Yes","Inputs, max.":"128 byte; Per device","Outputs, max.":"128 byte; Per device","Rail mounting":"Yes; Standard - DIN rail","Updating time":"4 ms; The minimum value of the update time also depends on the communication component set for PROFINET IO, on the number of IO devices and the quantity of configured user data.","For Signal \"0\"":"5 V DC at 1 mA","For Signal \"1\"":"15 V DC at 2.5 mA","Interface type":"RS 485 (max. 187.5 kbps)","PID controller":"Yes; PID closed-loop control function: Continuous controller outputs, binary controller outputs, automatic/manual mode, max. 8 loops","Shielded, Max.":"500 m","Type of memory":"DDR","Autonegotiation":"Yes","Parameterizable":"Yes; 6 Single phase: 4 HSCs at 200 kHz; 2 HSCs at 30 kHz 4 A/B phase: 2 HSCs at 100 kHz; 2 HSCs at 20 kHz","Weight, approx.":"367.3 g","lifecycle_stage":"current","\"0\" To \"1\", Max.":"10 ms; max.","\"1\" To \"0\", Max.":"10 ms; max.","Power loss, max.":"14 W","RJ 45 (Ethernet)":"Yes","Rated value (DC)":"24 V","S7 communication":"Yes","Unshielded, Max.":"150 m","Fall height, max.":"0.3 m; five times, in product package","Micro Memory Card":"Yes; microSDHC Card (optional)","Source/sink input":"Yes","Number of counters":"6","On Lamp Load, Max.":"30 W; 30 W with DC, 200 W with AC","PROFINET IO Device":"Yes; I-Device since V2.5","up to 40 °C, max.":"12","At \"0\" To \"1\", Max.":"12.8 ms","At \"0\" To \"1\", Min.":"0.2 ms","Programming package":"STEP 7 Micro/WIN SMART","Current output, max.":"300 mA; 24 V DC Sensor Power","For Signal \"1\", Typ.":"4 mA","Inrush current, max.":"9.3 A; at 264 V","Type of input voltage":"DC","PROFINET IO Controller":"Yes; Since V2.4","Deviation per day, max.":"120 s; within 120s/month at 25 °C","Number of pulse outputs":"3","Number of relay outputs":"8","Storage/transport, max.":"1 080 hPa","Storage/transport, min.":"660 hPa","Transmission rate, max.":"100 Mbit/s","For Bit Operations, Typ.":"150 ns; / instruction","Number of digital inputs":"12","Current consumption, max.":"290 mA; At 120 V AC","For Word Operations, Typ.":"1.2 µs; / instruction","Number of digital outputs":"8; Relays","With Resistive Load, Max.":"2 A","Hardware clock (real-time)":"Yes","Installation altitude, max.":"2 000 m","Installation altitude, min.":"-1 000 m","Number of RS 485 interfaces":"1","Vertical Installation, Max.":"45 °C","Vertical Installation, Min.":"0 °C","Horizontal Installation, Max.":"55 °C","Horizontal Installation, Min.":"0 °C","Test voltage at air discharge":"8 kV","Memory available for user data":"8 kbyte","Permissible Range, Lower Limit":"47 Hz","Permissible Range, Upper Limit":"63 Hz","for backplane bus (5 V DC), max.":"1.4 A; max. 5 V DC for EM bus","Current consumption (rated value)":"170 mA; at 240 V AC","Supports protocol for PROFINET IO":"Yes; RT Controller (since FW V2.4) & I-Device (since FW V2.5)","Test voltage at contact discharge":"4 kV","For Floating Point Arithmetic, Typ.":"3.6 µs; / instruction","permissible range, lower limit (AC)":"85 V","permissible range, lower limit (DC)":"77 V","permissible range, upper limit (AC)":"264 V","permissible range, upper limit (DC)":"138 V","Number of connectable IO Devices, max.":"8","Automatic Detection Of Transmission Rate":"Yes; 10/100 Mbit/s","Number of industrial Ethernet interfaces":"1","Limit class A, for use in industrial areas":"Yes; EN 61000-6-4, interference emission: Intended for use in industrial areas.","Operation at 25 °C without condensation, max.":"95 %","Of The Pulse Outputs, With Resistive Load, Max.":"1 Hz","Interference emission via line/AC current cables":"EN 61000-6-4, interference emission: Intended for use in industrial areas.","Of Which Inputs Usable For Technological Functions":"6; HSC (High Speed Counting)","For Signal \"0\", Max. (Permissible Quiescent Current)":"1 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$223.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9010525fd2e3c79c69f703f6ddc73e92.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1522364&mlfb=6ES7288-1SR20-0AA1"},"ai":{"faq":[{"question":"What's the closest functional second-source — 6ES7214-1BG31-0XB0?","answer":"The 6ES7214-1BG31-0XB0 is a different S7-1200 CPU variant; the evidence does not provide a direct cross-reference or substitution. Verify I/O count, memory, and firmware compatibility against your BOM before specifying."},{"question":"What are the key ratings?","answer":"12 kbyte program memory, 144-byte I/O image, 4 ms minimum PROFINET update, RS485 up to 187.5 kbps, PID up to 8 loops, six HSCs (four at 200 kHz), -40 to 70 °C, 1500 V AC isolation, 120/230 V AC supply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7288-1SR20-0AA1","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/6ES7288-1SR20-0AA1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}