{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7288-1ST40-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7288-1ST40-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7288-1ST40-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7288-1ST40-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-1200 CPU, 6ES7288-1ST40-0AA0, 24 KB program memory, 144-byte I/O, PROFINET, RS-485, PID control, 8 high-speed counters, -40 to 70 °C.","salesMarkdown":"The Siemens 6ES7288-1ST40-0AA0 is an S7-1200 CPU with 24 KB program memory, 144 bytes each of process-image inputs and outputs, and a maintenance-free RTC with 7-day backup. It supports LAD, FBD, STL, and RAM programming, and includes PROFINET (TCP/IP) with autonegotiation and autocrossing, plus an RS-485 interface for Modbus or point-to-point links. ## I/O and memory map The CPU maps 144 bytes of inputs and 144 bytes of outputs, covering 256 bits of digital I/O and 56 words of analog I/O per device. Program memory is 24 KB, with DDR-type RAM and flash for backup. The process-image update time on PROFINET IO can go as low as 4 ms, depending on the IO device count and configuration. ## Communication and motion PROFINET interface supports TCP/IP, autonegotiation, and autocrossing. The RS-485 port runs up to 187.5 kbps, shielded to 500 m. PROFIBUS DP is available via an add-on CM DP module. For motion, the CPU has 6 single-phase high-speed counters (4 at 200 kHz, 2 at 30 kHz) and 4 A/B-phase counters (2 at 100 kHz, 2 at 20 kHz), all parameterizable. ## Control and isolation Built-in PID control supports up to 8 loops with continuous or binary outputs and auto/manual mode. The CPU is transformer-isolated at 1,500 V AC. Digital input thresholds are split: I0.0–I0.3 switch below 1 V DC for signal 0 and above 4 V for signal 1; I0.4–I2.7 use < 5 V DC for 0 and > 15 V for 1.","metaTitle":"Siemens 6ES7288-1ST40-0AA0 S7-1200 CPU, 24 KB program, 70 °C","metaDescription":"Siemens 6ES7288-1ST40-0AA0 S7-1200 CPU with 24 KB program memory, 144-byte I/O, PROFINET, RS-485, PID control, 8 high-speed counters. Current lifecycle. 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":"6ES7288-1ST40-0AA0","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":"*** spare part *** 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 20.4-28.8V DC, program/data memory 40 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\"":"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","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","IP degree of protection":"IP20","Number of pulse outputs":"3","Number of relay outputs":"0","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","Short-circuit protection":"No","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.":"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":"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","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":"$433.00 – $969.87","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e880280e924e052199466c43615a0815.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=134960&mlfb=6ES7288-1ST40-0AA0"},"ai":{"faq":[{"question":"What programming languages does this CPU support?","answer":"It supports LAD, FBD, STL, and RAM programming."},{"question":"What is the ambient temperature range?","answer":"Rated for -40 °C to 70 °C."},{"question":"Does it have a real-time clock?","answer":"Yes, a hardware clock with no battery backup; it is maintenance-free and requires 7 days of power-on to retain time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7288-1ST40-0AA0","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/6ES7288-1ST40-0AA0 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}}