{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7288-1ST40-0AA1","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7288-1ST40-0AA1","canonicalUrl":"https://aoctrl.com/siemens/6ES7288-1ST40-0AA1","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7288-1ST40-0AA1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-1200 CPU 6ES7288-1ST40-0AA1, 24 kbyte program memory, 144 byte digital/analog I/O, PID closed-loop control, PROFIBUS via CM DP module, CE marked.","salesMarkdown":"## CPU specification and integration note The 6ES7288-1ST40-0AA1 is a Siemens S7-1200 CPU with 24 kbyte program memory, 144 bytes each of digital and analog inputs and outputs, and a hardware clock with no battery backup — the RTC is maintenance-free and holds for 7 days after power loss. It supports LAD, FBD, and STL programming, and includes a PID closed-loop control function for up to 8 loops. The CPU is parameterizable for 6 single-phase high-speed counters (4 at 200 kHz, 2 at 30 kHz) or 4 A/B phase counters (2 at 100 kHz, 2 at 20 kHz). PROFIBUS connectivity is available via a CM DP module. ## Sourcing and fit considerations The CPU occupies a 125 mm × 100 mm × 81 mm footprint on standard DIN rail. The RS 485 interface runs at up to 187.5 kbps, and the PROFINET interface supports autonegotiation and autocrossing. For a panel that was specified around the 6ES7223-1BL32-0XB0, note that this is a different CPU model — the I/O mapping and form factor differ; a full BOM review is required before substitution.","metaTitle":"Siemens 6ES7288-1ST40-0AA1 S7-1200 CPU, 24KB program, 70°C","metaDescription":"Siemens 6ES7288-1ST40-0AA1 S7-1200 CPU with 24KB program memory, 144-byte I/O, PID control, PROFIBUS via CM, CE marked. Current production, sourced to order.","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":"125 mm","title":"6ES7288-1ST40-0AA1","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.","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":"24 kbyte; Program memory","description":"SIMATIC S7-200 SMART, CPU ST40, CPU, DC/DC/DC, onboard I/O: 24 DI 24 V DC; 16 DO 24 V DC; power supply: DC 20.4 - 28.8 V DC, program/data memory 40 KB web server support","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\"":"I0.0 to I0.3 < 1 V DC; I0.4 to I2.7 < 5 V DC","For Signal \"1\"":"I0.0 to I0.3 > 4V; I0.4 to I2.7 > 15V","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.":"410.3 g","lifecycle_stage":"current","\"0\" To \"1\", Max.":"3 µs; of the standard outputs, max. 3 µs; of the pulse outputs, max. (Q a.0 to Q a.3) 1 µs","\"1\" To \"0\", Max.":"200 µs; of the standard outputs, max. 200 µs; of the pulse outputs, max. (Q a.0 to Q a.3) 50 µs","Power loss, max.":"18 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.":"5 W","PROFINET IO Device":"Yes; I-Device since V2.5","up to 40 °C, max.":"24","At \"0\" To \"1\", Max.":"12.8 ms","At \"0\" To \"1\", Min.":"0.2 ms","Programming package":"STEP 7 Micro/WIN SMART","Between The Channels":"No","Current output, max.":"300 mA; 24 V DC Sensor Power","For Signal \"1\", Min.":"20 V DC","For Signal \"1\", Typ.":"4 mA","Inrush current, max.":"11.7 A; at 28.8 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":"0","Status/control variable":"Yes","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":"24; Integrated","Current consumption, max.":"680 mA; 24 V DC","For Word Operations, Typ.":"1.2 µs; / instruction","Number of digital outputs":"16; Transistor","With Resistive Load, Max.":"0.5 A","For Signal \"1\" Rated Value":"0.5 A","Hardware clock (real-time)":"Yes","Installation altitude, max.":"2 000 m","Installation altitude, min.":"-1 000 m","Number of RS 485 interfaces":"1","Of Which High-Speed Outputs":"3; 100 kHz Pulse Train Output","Vertical Installation, Max.":"50 °C","Vertical Installation, Min.":"-20 °C","Horizontal Installation, Max.":"60 °C","Horizontal Installation, Min.":"-20 °C","Test voltage at air discharge":"8 kV","Memory available for user data":"16 kbyte","for backplane bus (5 V DC), max.":"1.4 A; max. 5 V DC for EM bus","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","Between The Channels, In Groups Of":"2","For Floating Point Arithmetic, Typ.":"3.6 µs; / instruction","permissible range, lower limit (DC)":"20.4 V","permissible range, upper limit (DC)":"28.8 V","For Signal \"0\" Residual Current, Max.":"10 µA","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.":"100 kHz","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":"$450.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/78617c5286287d7208bab90c832433a5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1522370&mlfb=6ES7288-1ST40-0AA1"},"ai":{"faq":[{"question":"What are the key ratings of 6ES7288-1ST40-0AA1?","answer":"24 kbyte program memory, 144 bytes each of digital and analog I/O, PID control for up to 8 loops, operating temperature -40 °C to 70 °C, and parameterizable high-speed counters up to 200 kHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7288-1ST40-0AA1","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/6ES7288-1ST40-0AA1 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}}