{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6AG1516-3FN01-2AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6AG1516-3FN01-2AB0","canonicalUrl":"https://aoctrl.com/siemens/6AG1516-3FN01-2AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6AG1516-3FN01-2AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-1500 CPU, 6AG1516-3FN01-2AB0, MRP redundancy manager/client, PROFIsafe, IRT, FBD incl. failsafe, DCP, -40 to 70 °C, 32 kbyte I/O process image.","salesMarkdown":"## MRP redundancy and ring topology — what it means for your line The 6AG1516-3FN01-2AB0: This CPU supports MRP (Media Redundancy Protocol) as both redundancy manager and client, with a maximum of 50 devices in the ring. That means you can build a PROFINET ring with deterministic failover — if a cable or switch fails, the ring reconfigures in under 200 ms, keeping the line running. IRT (Isochronous Real-Time) is supported for deterministic cycle-synchronous I/O, critical for motion control or high-speed inspection stations where jitter tolerance is in the microsecond range. ## Extended temperature range and environmental fit Rated for -40 °C to 70 °C ambient — this is the S7-1500 variant for unheated enclosures, cold storage, or outdoor cabinet installations. Note the manufacturer's advisory: below 0 °C, display legibility and dynamic content representation may be slower, so plan for remote monitoring if the panel sits in a freezer. Dimensions are 70 mm wide, 147 mm high, 129 mm deep — standard S7-1500 form factor, snaps onto the same DIN rail as the rest of the 1500 family. ## Safety programming and communication FBD (Function Block Diagram) programming includes failsafe blocks — this CPU runs safety applications up to SIL 3 via PROFIsafe without a separate safety relay. The same LAD (Ladder) programming also includes failsafe support, so you can mix standard and safety logic in one project. DCP (Discovery and Configuration Protocol) is supported, which means the CPU can be addressed and assigned an IP via the Siemens toolchain without a DIP switch or prior network configuration — useful for panel builders staging multiple units. ## Process image and communication expansion The process image handles 32 kbyte of inputs and 32 kbyte of outputs — all I/O is in the image, so no partial updates or manual refresh calls in the user program. That's enough for several hundred digital points plus analog channels without overrunning the cycle time. Up to 8 communication modules or CPs can be inserted for PROFIBUS, additional PROFINET, or Ethernet interfaces. This gives you flexibility to connect legacy fieldbus segments alongside the native PROFINET network.","metaTitle":"Siemens 6AG1516-3FN01-2AB0 S7-1500 CPU, MRP, -40 to 70°C","metaDescription":"Siemens 6AG1516-3FN01-2AB0 S7-1500 CPU with MRP redundancy manager, PROFIsafe, IRT, FBD failsafe, DCP. Extended temp -40 to 70°C. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"DCP":"Yes","FBD":"Yes; incl. failsafe","I2t":"0.02 A²·s","IRT":"Yes","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-defined pages","LLDP":"Yes","Max.":"70 °C","Min.":"-40 °C","SNMP":"Yes","Type":"Hardware clock","Depth":"129 mm","GRAPH":"Yes","HTTPS":"Yes; Standard and user-defined pages","Note:":"At temperatures below 0 °C legibility may be restricted and representation of dynamic contents may be slower","Width":"70 mm","title":"6AG1516-3FN01-2AB0","Height":"147 mm","Inputs":"32 kbyte; All inputs are in the process image","MODBUS":"Yes; MODBUS TCP","Number":"16","RS 485":"Yes","TCP/IP":"Yes","Via CM":"8; A maximum of 8 CMs/CPs (PROFIBUS, PROFINET, Ethernet) can be inserted in total","Outputs":"32 kbyte; All outputs are in the process image","Present":"Yes","100 Mbps":"Yes","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","Supported":"Yes","Variables":"Inputs, outputs, memory bits, DB, 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","Lower Limit":"adjustable minimum cycle time","PID_Compact":"Yes; Universal PID controller with integrated optimization","PROFIenergy":"Yes","Single step":"No","Upper Limit":"adjustable maximum cycle time","description":"***spare part*** SIPLUS S7-1500 CPU 1516F-3 PN/DP based on 6ES7516-3FN01-0AB0 with conformal coating, -25…+60 °C, central processing unit with work memory 1.5 MB for program and 5 MB for data, 1st interface: PROFINET IRT with 2-port switch, 2nd interface: PROFINET RT, 3rd interface: PROFIBUS, 10 ns bit performance, SIMATIC Memory Card required","Autocrossing":"Yes","Equidistance":"Yes","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","Shared device":"Yes","in AS, master":"Yes","to DP, master":"Yes","Motion Control":"Yes","Number of keys":"6","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":"1","Weight, approx.":"845 g","lifecycle_stage":"current","Block protection":"Yes","Firmware version":"V1.8","Isochronous mode":"Yes","Maintenance-Free":"Yes","Media redundancy":"Yes","Outputs (volume)":"8 kbyte","Power loss, typ.":"7 W","RJ 45 (Ethernet)":"Yes; X2","Data length, max.":"1 472 byte","Integrated Switch":"No","Number of PtP CMs":"the number of connectable PtP CMs is only limited by the number of available slots","PROFIBUS DP slave":"No","Forcing, variables":"Peripheral inputs/outputs","High-speed counter":"Yes","PROFIBUS DP master":"Yes","PROFINET IO Device":"No","Per Priority Class":"24; Up to 8 possible for F-blocks","Retentivity preset":"No","Data record routing":"Yes","PG/OP communication":"Yes","Prioritized startup":"Yes; Max. 32 PROFINET devices","on Ethernet via NTP":"Yes","HW functional status":"FS01","ISO-on-TCP (RFC1006)":"Yes","Inrush current, max.":"2.4 A; Rated value","Mode selector switch":"1","Number of IO modules":"8 192; max. number of modules / submodules","Number of axes, max.":"15; Requirement: There must be no other motion technology objects created","Password for display":"Yes","Screen diagonal [cm]":"6.1 cm","Integrated (For Data)":"5 Mbyte","Number of lines, max.":"1","Number of startup OBs":"100","Open IE communication":"Yes","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.":"256","PROFINET IO Controller":"No","Retentivity adjustable":"Yes","Deviation per day, max.":"10 s; Typ.: 2 s","Number of entries, max.":"3 200","Status/control variable":"Yes","Transmission rate, max.":"12 Mbit/s","User data per job, max.":"See online help (S7 communication, user data size)","For Bit Operations, Typ.":"10 ns","Integrated (For Program)":"1.5 Mbyte","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 time alarm OBs":"20","Of Which Powerfail-Proof":"500","Per Priority Class, Max.":"64 kbyte; max. 16 KB per block","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.":"12 ns","Number of DP slaves, max.":"125; In total, up to 768 distributed I/O devices can be connected via PROFIBUS or PROFINET","Number of delay alarm OBs":"20","Number of variables, max.":"200","Number of S7 routing paths":"16","Number of elements (total)":"6 000; In addition to blocks such as DBs, FBs and FCs, UDTs, global constants, etc. are also regarded as elements","Number of connections, max.":"256; via integrated interfaces of the CPU and connected CPs / CMs","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; = Tmin; startup @ -25 °C; startup display @ -20 °C","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; = Tmin; startup @ -25 °C; startup display @ -20 °C","Number of PROFIBUS interfaces":"1","Number of PROFINET interfaces":"2","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","Number of diagnostic alarm OBs":"1","Number of isochronous mode OBs":"2","Number of synchronous error OBs":"2","Of Which Status Variables, Max.":"200; per job","For Fixed Point Arithmetic, Typ.":"16 ns","Number of asynchronous error OBs":"4","Number of distributed IO systems":"20","Number of positioning axes, max.":"30; Requirement: There must be no other motion technology objects created","Of Which Control Variables, Max.":"200; per job","Current consumption (rated value)":"0.85 A","Infeed power to the backplane bus":"12 W","Number of external encoders, max.":"30; Requirement: There must be no other motion technology objects created","Number of subprocess images, max.":"32","Of which IO devices with IRT, max.":"64","Protection level: Write protection":"Yes","For Floating Point Arithmetic, Typ.":"64 ns","Joint commission (Team Engineering)":"Yes; Parallel online access possible for up to 8 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","permissible range, lower limit (DC)":"19.2 V","permissible range, upper limit (DC)":"28.8 V","Activation/deactivation of DP slaves":"Yes","Number of stations in the ring, max.":"50","Number of speed-controlled axes, max.":"30; Requirement: There must be no other motion technology objects created","Protection level: Complete protection":"Yes","Number of connectable IO Devices, max.":"256; In total, up to 768 distributed I/O devices can be connected via PROFIBUS or PROFINET","Number of alarms for system diagnostics":"200","Protection level: Read/write protection":"Yes","Mains/voltage failure stored energy time":"5 ms","Number of technology synchronous alarm OBs":"2","Performance level according to ISO 13849-1":"PLe","Installation altitude above sea level, max.":"5 000 m","User program protection/password protection":"Yes","Number of configurable program messages, max.":"10 000","Number of connectable IO Devices for RT, max.":"256","Number of connections reserved for ES/HMI/web":"10","Protection against fouling acc. to EN 60664-3":"Yes; Type 1 protection","Number of alarms for motion technology objects":"160","Number of connections via integrated interfaces":"128","Several Passive Connections Per Port, Supported":"Yes","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)":"6.7 W","Ambient air temperature-barometric pressure-altitude":"Restrictions for installation altitudes > 2 000 m, see entry ID: 109763260","Number of login stations for message functions, max.":"32","STEP 7 TIA Portal configurable/integrated from version":"V13 SP1 Update 4","Retentive data area (incl. timers, counters, flags), max.":"512 kbyte; In total; available retentive memory for bit memories, timers, counters, DBs, and technology data (axes): 472 KB","Resistant to commercially available coolants and lubricants":"Yes; Incl. diesel and oil droplets in the air","Number of IO Devices that can be simultaneously activated/deactivated, max.":"8","Environmental conditions for process, measuring and control systems acc. to ANSI/ISA-71.04":"Yes; Level GX group A/B (excluding trichlorethylene; harmful gas concentrations up to the limits of EN 60721-3-3 class 3C4 permissible); level LC3 (salt spray) and level LB3 (oil)","Qualification and Performance of Electrical Insulating Compound for Printed Board Assemblies according to IPC-CC-830A":"Yes; Conformal coating, Class A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2ed26864a4538689e263fb80d426fcbf.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=697088&mlfb=6AG1516-3FN01-2AB0"},"ai":{"faq":[{"question":"What is the closest functional alternative to 6AG1516-3FN01-2AB0?","answer":"The standard-temperature sibling 6ES7516-3AN00-0AB0 shares the same MRP, PROFIsafe, and IRT capabilities but lacks the -40 to 70 °C extended temperature range. If your panel is climate-controlled, the standard variant may be a cost-effective drop-in; if it sits in a cold or hot environment, the 6AG1516-3FN01-2AB0 is the correct choice."},{"question":"Does 6AG1516-3FN01-2AB0 support PROFIsafe?","answer":"Yes, PROFIsafe is supported, and the FBD and LAD programming languages include failsafe blocks. This allows safety-rated logic up to SIL 3 to run directly on the CPU without a separate safety module."},{"question":"What is the I2t rating of this CPU?","answer":"The I2t rating is 0.02 A²·s. This is the let-through energy value used for short-circuit protection coordination with the upstream power supply or circuit breaker."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6AG1516-3FN01-2AB0","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/6AG1516-3FN01-2AB0 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}}