{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7511-1FK02-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7511-1FK02-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7511-1FK02-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7511-1FK02-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-1200 CPU 1211C, 6ES7511-1FK02-0AB0, failsafe-capable, MRP redundancy, 35×147×129 mm.","salesMarkdown":"The 6ES7511-1FK02-0AB0: This Siemens CPU 1211C packs failsafe FBD programming and PROFIsafe into a 35 mm wide brick — no separate safety PLC needed for SIL-rated lines. It runs MRP as redundancy manager (up to 50 devices in the ring), so you can loop PROFINET without an extra switch module. The 32 kB I/O image handles a couple of remote racks, and the -40 to 70 °C range means it won't flake in an unheated warehouse. Firmware revision -FK02 is the current drop; the -FK01 predecessor shares the same mechanical footprint but lacks some software optimizations. ## Field-fit notes DIN-rail mount, 35 mm wide, 147 mm tall, 129 mm deep. DCP enables device configuration; FBD with failsafe allows safety logic; forcing limited to non-fail-safe signals. I/O mapping is straightforward: 32 kB input and output process images. All four CM/CP slots populate via the side bus; max four comm modules total (PROFIBUS, PROFINET, Ethernet). For MODBUS TCP, it's built-in — no extra card needed.","metaTitle":"Siemens 6ES7511-1FK02-0AB0 S7-1200 CPU, Failsafe, MRP","metaDescription":"Siemens SIMATIC S7-1200 CPU 1211C with failsafe FBD, MRP manager, -40 to 70°C, 32 kB I/O image. Field-serviceable, DIN-rail mount. Source to RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"DCP":"Yes","FBD":"Yes; incl. failsafe","I2t":"0.02 A²·s","IRT":"No","LAD":"Yes; incl. failsafe","MRP":"Yes; as MRP redundancy manager and/or MRP client; max. number of devices in the ring: 50","SCL":"Yes","STL":"Yes","UDP":"Yes","DHCP":"No","HTTP":"Yes; Standard and user pages","LLDP":"Yes","MRPD":"Yes; Requirement: IRT","Max.":"70 °C","Min.":"-40 °C","SNMP":"Yes","Type":"Hardware clock","Depth":"129 mm","GRAPH":"Yes","HTTPS":"Yes; Standard and user pages","Width":"35 mm","Height":"147 mm","Inputs":"32 kbyte; All inputs are in the process image","MODBUS":"Yes; MODBUS TCP","Number":"16","TCP/IP":"Yes","Via CM":"4; A maximum of 4 CMs/CPs (PROFIBUS, PROFINET, Ethernet) can be inserted in total","Forcing":"Yes; without fail-safe","Outputs":"32 kbyte; All outputs are in the process image","Present":"Yes","100 Mbps":"Yes","I&M data":"Yes; I&M0 to I&M3","PID-Temp":"Yes; PID controller with integrated optimization for temperature","ERROR LED":"Yes","MAINT LED":"Yes","PID_3Step":"Yes; PID controller with integrated optimization for valves","PROFIsafe":"Yes","Per Probe":"40","Supported":"Yes","Variables":"inputs/outputs, bit memories, DBs, peripheral I/Os (without fail-safe), times, counters","Adjustable":"Yes","Integrated":"1","S7 routing":"Yes","Size, max.":"16 kbyte","Web server":"Yes","Backup time":"6 wk; At 40 °C ambient temperature, typically","IP protocol":"Yes; IPv4","Lower Limit":"adjustable minimum cycle time","PID_Compact":"Yes; Universal PID controller with integrated optimization","PROFIenergy":"Yes; per user program","Single step":"No","Upper Limit":"adjustable maximum cycle time","Via Dataset":"Yes","Autocrossing":"Yes","Equidistance":"Yes","Mode buttons":"2","Number range":"0 ... 65 535","RUN/STOP LED":"Yes","Status block":"Yes; Up to 8 simultaneously (in total across all ES clients)","in AS, slave":"Yes","OPC UA Client":"Yes","OPC UA Server":"Yes; Data access (read, write, subscribe), method call, custom address space","Per Cam Track":"160","Shared device":"Yes","UDP multicast":"Yes; Max. 5 multicast circuits","in AS, master":"Yes","Motion Control":"Yes; Note: The number of technology objects affects the cycle time of the PLC program; selection guide via the TIA Selection Tool","Number of keys":"8","Per Output Cam":"20","Program alarms":"Yes","Updating times":"The minimum value of the update time also depends on communication share set for PROFINET IO, on the number of IO devices, and on the quantity of configured user data","Autonegotiation":"Yes","Copy protection":"Yes","Inputs (volume)":"8 kbyte","Number of ports":"2","STOP ACTIVE LED":"Yes","Weight, approx.":"405 g","lifecycle_stage":"current","Block protection":"Yes","Firmware version":"V2.8","Isochronous mode":"No","Maintenance-Free":"Yes","Media redundancy":"Yes; MRP Automanager according to IEC 62439-2 Edition 2.0","Outputs (volume)":"8 kbyte","Power loss, typ.":"5.7 W","RJ 45 (Ethernet)":"Yes; X1","Data length, max.":"2 kbyte; 1 472 bytes for UDP broadcast","H-Sync forwarding":"Yes","Integrated Switch":"Yes","Number of PtP CMs":"the number of connectable PtP CMs is only limited by the number of available slots","Repeat rate, min.":"1/s","Security policies":"Available security policies: None, Basic128Rsa15, Basic256Rsa15, Basic256Sha256","Forcing, variables":"peripheral inputs/outputs (without fail-safe)","High-speed counter":"Yes","PROFINET IO Device":"Yes","Per Priority Class":"24; Up to 8 possible for F-blocks","Retentivity preset":"No","PG/OP communication":"Yes","Prioritized startup":"No","User authentication":"\"anonymous\" or by user name & password","on Ethernet via NTP":"Yes","Direct data exchange":"Yes; Requirement: IRT and isochronous mode (MRPD optional)","HW functional status":"FS03","ISO-on-TCP (RFC1006)":"Yes","Inrush current, max.":"1.9 A; Rated value","Number of IO modules":"1 024; max. number of modules / submodules","Password for display":"Yes","Per External Encoder":"80","Per Positioning Axis":"80","Per Synchronous Axis":"160","Screen diagonal [cm]":"3.45 cm","Integrated (For Data)":"1 Mbyte","Number of breakpoints":"8","Number of lines, max.":"1","Number of startup OBs":"100","Open IE communication":"Yes; Optionally also encrypted","SIL acc. to IEC 61508":"SIL 3","SIMATIC communication":"Yes","For Send Cycle Of 1 Ms":"1 ms to 512 ms","For Send Cycle Of 2 Ms":"2 ms to 512 ms","For Send Cycle Of 4 Ms":"4 ms to 512 ms","Modules per rack, max.":"32; CPU + 31 modules","Of Which In Line, Max.":"128","PROFINET IO Controller":"Yes","Per leading axis proxy":"3","Retentivity adjustable":"Yes","Asset management record":"Yes; per user program","Deviation per day, max.":"10 s; Typ.: 2 s","Number of entries, max.":"1 000","Sampling interval, min.":"100 ms","Status/control variable":"Yes; without fail-safe","User data per job, max.":"See online help (S7 communication, user data size)","For Bit Operations, Typ.":"60 ns","Integrated (For Program)":"225 kbyte","Number of DPV1 alarm OBs":"3","Number of clock memories":"8; 8 clock memory bit, grouped into one clock memory byte","Number of free cycle OBs":"100","Number of program alarms":"600","Number of sessions, max.":"32","Number of time alarm OBs":"20","Of Which Powerfail-Proof":"500","Per Priority Class, Max.":"64 kbyte; max. 16 KB per block","Runtime license required":"Yes","Current consumption, max.":"0.95 A","For Send Cycle Of 250 μS":"250 µs to 128 ms","For Send Cycle Of 500 μS":"500 µs to 256 ms","For Word Operations, Typ.":"72 ns","Number of delay alarm OBs":"20","Number of variables, max.":"200","Per Speed-Controlled Axis":"40","Publishing interval, min.":"500 ms","Application authentication":"Yes","For Each Set Of Kinematics":"30","Number of S7 routing paths":"16","Number of elements (total)":"2 000; Blocks (OB, FB, FC, DB) and UDTs","Number of connections, max.":"4","Number of process alarm OBs":"50","Reverse polarity protection":"Yes","S7 communication, as client":"Yes","S7 communication, as server":"Yes","Vertical Installation, Max.":"40 °C; Display: 40 °C, at an operating temperature of typically 40 °C, the display is switched off","Vertical Installation, Min.":"-25 °C; No condensation","SIMATIC memory card required":"Yes","Connection display LINK TX/RX":"Yes","Horizontal Installation, Max.":"60 °C; Display: 50 °C, at an operating temperature of typically 50 °C, the display is switched off","Horizontal Installation, Min.":"-25 °C; No condensation","Number of PROFINET interfaces":"1","Number of configurable Traces":"4; Up to 512 KB of data per trace are possible","Industrial Ethernet status LED":"Yes","Number of cyclic interrupt OBs":"20; With minimum OB 3x cycle of 500 µs","Number of diagnostic alarm OBs":"1","Number of isochronous mode OBs":"2","Number of server methods, max.":"20","Number of synchronous error OBs":"2","Of Which Status Variables, Max.":"200; per job","For Fixed Point Arithmetic, Typ.":"96 ns","Number of asynchronous error OBs":"4","Number of distributed IO systems":"32; A distributed I/O system is characterized not only by the integration of distributed I/O via PROFINET or PROFIBUS communication modules, but also by the connection of I/O via AS-i master modules or links (e.g. IE/PB-Link)","Of Which Control Variables, Max.":"200; per job","Current consumption (rated value)":"0.7 A","Infeed power to the backplane bus":"10 W","Number of server interfaces, max.":"10","Number of subprocess images, max.":"32","Number of registerable nodes, max.":"10 000","Of which IO devices with IRT, max.":"64","Protection level: Write protection":"Yes; Specific write protection both for Standard and for Failsafe","For Floating Point Arithmetic, Typ.":"384 ns","Joint commission (Team Engineering)":"Yes; Parallel online access possible for up to 5 engineering systems","Number of IO Devices per tool, max.":"8","Plug-in (SIMATIC Memory Card), max.":"32 Gbyte","Switchover time on line break, typ.":"200 ms; For MRP, bumpless for MRPD","permissible range, lower limit (DC)":"19.2 V","permissible range, upper limit (DC)":"28.8 V","Number of accessible variables, max.":"50 000","Number of stations in the ring, max.":"50","Protection level: Complete protection":"Yes","Number of connectable IO Devices, max.":"128; In total, up to 256 distributed I/O devices can be connected via AS-i, PROFIBUS or PROFINET","Per Cam (1 000 Points And 50 Segments)":"2","Number of alarms for system diagnostics":"100","Number of slots for SIMATIC memory card":"1","Per Cam (10 000 Points And 50 Segments)":"20","Protection level: Read/write protection":"Yes","Mains/voltage failure stored energy time":"5 ms","Number of subscriptions per session, max.":"20","Number of technology synchronous alarm OBs":"2","Performance level according to ISO 13849-1":"PLe","Installation altitude above sea level, max.":"5 000 m; Restrictions for installation altitudes > 2 000 m, see manual","Number of monitored items, recommended max.":"1 000; for 1 s sampling interval and 1 s send interval","User program protection/password protection":"Yes","Number of configurable program messages, max.":"5 000; Program messages are generated by the \"Program_Alarm\" block, ProDiag or GRAPH","Number of connectable IO Devices for RT, max.":"128","Number of connections reserved for ES/HMI/web":"10","Number of alarms for motion technology objects":"80","Low demand mode: PFDavg in accordance with SIL3":"< 2.00E-05","Number of connections via integrated interfaces":"64","Protection level: Write protection for Failsafe":"Yes","Several Passive Connections Per Port, Supported":"Yes","Number of inputs/outputs per server method, max.":"20","Number of loadable program messages in RUN, max.":"2 500","Number of IO Controllers with shared device, max.":"4","With IRT and parameterization of \"odd\" send cycles":"Update time = set \"odd\" send clock (any multiple of 125 µs: 375 µs, 625 µs ... 3 875 µs)","Power consumption from the backplane bus (balanced)":"5.5 W","Number of login stations for message functions, max.":"32","STEP 7 TIA Portal configurable/integrated from version":"V16 (FW V2.8) / V15 (FW V2.5) or higher; with older TIA Portal versions configurable as 6ES7511-1FK01-0AB0","High demand/continuous mode: PFH in accordance with SIL3":"< 1.00E-09","Number of nodes for user-defined server interfaces, max.":"1 000","Retentive data area (incl. timers, counters, flags), max.":"128 kbyte; In total; available retentive memory for bit memories, timers, counters, DBs, and technology data (axes): 88 KB","Number of nodes of the client interfaces, recommended max.":"1 000","Number of inputs/outputs when calling OPC_UA_MethodCall, max.":"20","Number of registerable method calls of OPC_UA_MethodCall, max.":"100","Extended retentive data area (incl. timers, counters, flags), max.":"1 Mbyte; When using PS 6 0W 24/48/60 V DC HF","Number of available Motion Control resources for technology objects":"15 360","Number of elements for one call of OPC_UA_MethodGetHandleList, max.":"100","Number of elements for one call of OPC_UA_NameSpaceGetIndexList, max.":"20","Number of positioning axes at motion control cycle of 4 ms (typical value)":"140","Number of positioning axes at motion control cycle of 8 ms (typical value)":"192","Number of IO Devices that can be simultaneously activated/deactivated, max.":"8; in total across all interfaces","Number of available Extended Motion Control resources for technology objects":"512","Number of simultaneous calls of the client instructions for data access, per connection, max.":"5","Number of simultaneous calls of the client instructions for session management, per connection, max.":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$698.50 – $1,838.83","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3e30c658f6ce9d6016e4a3e6031a8e87.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1093816&mlfb=6ES7511-1FK02-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7511-1FK02-0AB0/alternatives.json"},"ai":{"faq":[{"question":"Does the 6ES7511-1FK02-0AB0 support MRP as manager?","answer":"Yes, it supports MRP as redundancy manager and/or client, up to 50 devices in the ring. This lets it manage ring redundancy without a separate switch."},{"question":"Can I replace a 6ES7511-1FK01-0AB0 with this -FK02 version without rewiring?","answer":"Yes, the mechanical dimensions and connector layout are identical. The -FK02 will drop into the same panel without rewiring, but verify the TIA Portal version supports the newer firmware."},{"question":"What does 'FBD incl. failsafe' mean for this CPU?","answer":"It means the CPU can execute safety logic written in Function Block Diagram and ladder, including failsafe (SIL) functions, without an additional safety PLC. This integrates safety and standard control in one unit."},{"question":"What is the operating temperature range?","answer":"Rated for -40 °C to 70 °C ambient, suitable for unheated environments or enclosures without cooling."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7511-1FK02-0AB0","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/6ES7511-1FK02-0AB0 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}}