{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7288-1SR40-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7288-1SR40-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7288-1SR40-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7288-1SR40-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-1200 CPU, 6ES7288-1SR40-0AA0, 24 kbyte program memory, 70 °C max, 1500 V AC isolation, PID control, PROFINET, RS-485.","salesMarkdown":"The Siemens 6ES7288-1SR40-0AA0 is an S7-1200 CPU with 24 kbyte of program memory (DDR RAM backed by Flash), enough for medium-size machine logic — think a packaging cell or a small conveyor line with a few dozen rungs and a PID loop or two. It supports LAD, FBD, and STL programming, so your existing codebase in any of those languages ports straight in. The CPU handles up to 144 bytes each of digital and analog I/O (256 bits digital, 56 words analog), with a per-device cap of 128 bytes for inputs and outputs — that covers a local rack plus a couple of remote slices over PROFINET. The 1500 V AC transformer isolation on the supply (120/230 V AC) means you can run it on a dirty line without worrying about conducted noise crashing the logic — common in retrofit panels where the isolation transformer was skipped. Built-in PID controller handles up to 8 loops with continuous or binary outputs and auto/manual mode — no separate loop controller needed for temperature, pressure, or flow regulation. The real-time clock is maintenance-free but needs 7 days of power-on to charge the supercap; after that it holds time for about 7 days without power. If your process logs events with timestamps, plan for a brief RTC recharge after a long shutdown. ## Fieldbus and networking — what fits where PROFINET is onboard with autonegotiation and autocrossing (auto MDI/MDI-X), so you can plug into any switch or direct to a PC without a crossover cable. The minimum update time is 4 ms, but that depends on the IO device count and data volume — expect around 4–8 ms for a small network. For legacy fieldbus, an RS-485 port runs at up to 187.5 kbps (the standard PROFIBUS baud), and the CPU can act as a PROFIBUS client or server via a CM DP module — useful when you're tying into an older drive or remote I/O island. The RS-485 interface is electrically isolated? The evidence doesn't say, so treat it as non-isolated and add an isolator if the cable runs outside the panel or shares a tray with VFD leads. Shielded cable max is 500 m; keep it under that to avoid signal degradation. ## High-speed counters and forcing — edge cases covered Six high-speed counters are parameterizable: four single-phase at 200 kHz and two at 30 kHz, or four A/B-phase quadrature at 100 kHz and two at 20 kHz. That covers encoder feedback for a servo axis or a fast count from a proximity sensor on a bottling line. Forcing is supported — you can override inputs or outputs during commissioning without changing the program, which saves time when you're chasing a wiring fault.","metaTitle":"Siemens 6ES7288-1SR40-0AA0 S7-1200 CPU, 24 kbyte memory, 70","metaDescription":"Siemens 6ES7288-1SR40-0AA0 S7-1200 CPU with 24 kbyte program memory, 70 °C max ambient, 1500 V AC isolation, PID control, PROFINET, RS-485. CE marked. 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":"6ES7288-1SR40-0AA0","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.","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":"24 kbyte; Program memory","description":"*** spare part *** SIMATIC S7-200 SMART, CPU SR40, CPU, AC/DC/relay, onboard I/O: 24 DI 24 V DC; 16 DO relay 2 A; power supply: AC 85-264 V AC at 47-63 Hz, 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\"":"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.":"441.3 g","lifecycle_stage":"current","\"0\" To \"1\", Max.":"10 ms; max.","\"1\" To \"0\", Max.":"10 ms; max.","Power loss, max.":"23 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.":"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\", Typ.":"4 mA","Inrush current, max.":"16.3 A; at 264 V","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":"16","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.":"300 mA; At 120 V AC","For Word Operations, Typ.":"1.2 µs; / instruction","Number of digital outputs":"16; 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":"16 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)":"190 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, upper limit (AC)":"264 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":"4; HSC (High Speed Counting)","For Signal \"0\", Max. (Permissible Quiescent Current)":"1 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$267.00 – $453.96","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4ea0b27a6fe4cd76342ed001622f1edb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=422577&mlfb=6ES7288-1SR40-0AA0"},"ai":{"faq":[{"question":"What are the key programming languages supported?","answer":"LAD (ladder), FBD (function block diagram), and STL (statement list) are all supported."},{"question":"What is the ambient temperature range?","answer":"Operating ambient range is -40 °C to 70 °C."},{"question":"Does it have a real-time clock with battery backup?","answer":"It has a hardware clock with no battery backup; it is maintenance-free and requires 7 days of power-on to charge the supercap, then holds time for about 7 days without power."},{"question":"What fieldbus interfaces are built in?","answer":"PROFINET (with autonegotiation and autocrossing) and RS-485 (up to 187.5 kbps) are onboard. PROFIBUS is available via a CM DP module."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7288-1SR40-0AA0","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/6ES7288-1SR40-0AA0 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}}