{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6AG1518-4FP00-4AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6AG1518-4FP00-4AB0","canonicalUrl":"https://aoctrl.com/siemens/6AG1518-4FP00-4AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6AG1518-4FP00-4AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-1500 CPU 1518F-4 PN, 6AG1518-4FP00-4AB0, fail-safe controller, -40..70°C, PROFIsafe V2.4/2.6, 2x 100 Mbps + 1x 1000 Mbps.","salesMarkdown":"## What this CPU delivers The 6AG1518-4FP00-4AB0 is a fail-safe CPU in the S7-1500 line, built for safety applications requiring PROFIsafe communication at V2.4 or V2.6. It processes both standard and fail-safe logic, supporting FBD and LAD with failsafe blocks, and includes a dedicated ERROR LED and MAINT LED for diagnostics. ## Integration and I/O profile The process image handles up to 32 kbyte each for inputs and outputs, covering all I/O in the image. The CPU supports up to 8 additional communication modules (PROFIBUS, PROFINET, Ethernet) via the left-side slot. RS-485 is available on the X4 interface for legacy serial devices. Programming can be in LAD, FBD (both with failsafe), STL, SCL, or GRAPH. The integrated and controllers handle temperature loops and valve actuation directly, reducing the need for external controllers. Physical footprint: 175 mm wide, 147 mm high, 129 mm deep — standard S7-1500 format, so it fits existing panel layouts designed for the 1518 series. The hardware clock keeps real-time sync without an external module.","metaTitle":"Siemens 6AG1518-4FP00-4AB0 S7-1500 CPU, failsafe, -40..70°C","metaDescription":"Siemens 6AG1518-4FP00-4AB0 fail-safe CPU for S7-1500, with PROFIsafe V2.4/2.6, operates -40 to 70°C, supports DCP/DNS/MODBUS TCP. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"DCP":"Yes","DNS":"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","SCL":"Yes","STL":"Yes","UDP":"Yes","DHCP":"Yes","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":"175 mm","title":"6AG1518-4FP00-4AB0","Height":"147 mm","Inputs":"32 kbyte; All inputs are in the process image","MODBUS":"Yes; MODBUS TCP","Number":"16","RS 485":"Yes; X4","TCP/IP":"Yes","Via CM":"8; A maximum of 8 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","1000 Mbps":"Yes; Only possible at the X3 interface of the CPU 1518","ERROR LED":"Yes","MAINT LED":"Yes","PID_3Step":"Yes; PID controller with integrated optimization for valves","PROFIsafe":"Yes; V2.4 / V2.6","Per Probe":"40","Supported":"Yes","Variables":"inputs/outputs, bit memories, DBs, peripheral I/Os (without fail-safe), times, counters","Adjustable":"Yes","Encryption":"Yes; Optional","Integrated":"2","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","description":"SIPLUS S7-1500 CPU 1518F-4 PN/DP based on 6ES7518-4FP00-0AB0 with conformal coating, 0…+60 °C, central processing unit with work memory 4.5 MB for program and 10 MB for data, 1st interface: PROFINET IRT with 2-port switch, 2nd interface, Ethernet, 3rd interface, Ethernet, 4th interface, PROFIBUS, 1 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 16 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; 128 multicast circuits (of which max. 5 via X1)","in AS, master":"Yes","to DP, 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":"6","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":"1","Weight, approx.":"1 988 g","lifecycle_stage":"current","Block protection":"Yes","Isochronous mode":"Yes","Maintenance-Free":"Yes","Media redundancy":"only via 1st interface (X1)","Outputs (volume)":"8 kbyte","Power loss, typ.":"24 W","RJ 45 (Ethernet)":"Yes; X3","Rated value (DC)":"24 V","Data length, max.":"2 kbyte; 1 472 bytes for UDP broadcast","H-Sync forwarding":"Yes","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","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","PROFIBUS DP master":"Yes","PROFINET IO Device":"No","Per Priority Class":"24","Retentivity preset":"No","Data record routing":"Yes","PG/OP communication":"Yes","Prioritized startup":"No","User authentication":"\"anonymous\" or by user name & password","on Ethernet via NTP":"Yes","Direct data exchange":"No","ISO-on-TCP (RFC1006)":"Yes","Inrush current, max.":"2.4 A; Rated value","Mode selector switch":"1","Number of IO modules":"16 384; max. number of modules / submodules","Password for display":"Yes","Per External Encoder":"80","Per Positioning Axis":"80","Per Synchronous Axis":"160","Screen diagonal [cm]":"6.1 cm","Integrated (For Data)":"60 Mbyte","Number of breakpoints":"20","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.":"128","PROFINET IO Controller":"No","Retentivity adjustable":"Yes","Asset management record":"Yes; per user program","Deviation per day, max.":"10 s; Typ.: 2 s","Number of entries, max.":"3 200","Sampling interval, min.":"10 ms","Status/control variable":"Yes; without fail-safe","Transmission rate, max.":"12 Mbit/s","User data per job, max.":"See online help (S7 communication, user data size)","For Bit Operations, Typ.":"1 ns","Integrated (For Program)":"9 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":"4 000","Number of sessions, max.":"64","Number of time alarm OBs":"20","Of Which Powerfail-Proof":"1 000","Per Priority Class, Max.":"64 kbyte; max. 16 KB per block","Runtime license required":"Yes","For Send Cycle Of 125 μS":"125 µs","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.":"2 ns","Number of DP slaves, max.":"125; In total, up to 1 000 distributed I/O devices can be connected via AS-i, PROFIBUS or PROFINET","Number of delay alarm OBs":"20","Number of variables, max.":"200","Per Speed-Controlled Axis":"40","Publishing interval, min.":"10 ms","Application authentication":"Yes","Number of S7 routing paths":"64; in total, only 16 S7-Routing connections are supported via PROFIBUS","Number of elements (total)":"20 000; Blocks (OB, FB, FC, DB) and UDTs","For Send Cycle Of 187.5 μS":"187.5 µs","Number of connections, max.":"40","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.":"0 °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.":"0 °C","Number of PROFIBUS interfaces":"1","Number of PROFINET interfaces":"3","Number of configurable Traces":"8; Up to 512 KB of data per trace are possible","Industrial Ethernet status LED":"Yes","MRP interconnection, supported":"Yes; as ring node according to IEC 62439-2 Edition 2.0","Number of cyclic interrupt OBs":"20; with minimum OB 3x cycle of 100 µs","Number of diagnostic alarm OBs":"1","Number of isochronous mode OBs":"3","Number of server methods, max.":"100","Number of synchronous error OBs":"2","Of Which Status Variables, Max.":"200; per job","For Fixed Point Arithmetic, Typ.":"2 ns","Number of asynchronous error OBs":"4","Number of distributed IO systems":"64; 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)":"1.55 A","Infeed power to the backplane bus":"12 W","Number of server interfaces, max.":"10 of each \"Server interfaces\" / \"Companion specification\" type and 20 of the type \"Reference namespace\"","Number of subprocess images, max.":"32","Number of registerable nodes, max.":"50 000","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.":"6 ns","Joint commission (Team Engineering)":"Yes; Parallel online access possible for up to 10 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","Activation/deactivation of DP slaves":"Yes","Number of accessible variables, max.":"200 000","Number of stations in the ring, max.":"50","activation/deactivation of I-devices":"Yes; per user program","Protection level: Complete protection":"Yes","Number of connectable IO Devices, max.":"128; In total, up to 1 000 distributed I/O devices can be connected via AS-i, PROFIBUS or PROFINET","Number of alarms for system diagnostics":"1 000","Number of slots for SIMATIC memory card":"1","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","Number of monitored items, recommended max.":"10 000; for 1 s sampling interval and 1 s send interval","User program protection/password protection":"Yes","Number of configurable program messages, max.":"10 000; 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","Protection against fouling acc. to EN 60664-3":"Yes; Type 1 protection","Number of alarms for motion technology objects":"480","Low demand mode: PFDavg in accordance with SIL3":"< 2.00E-05","Number of connections via integrated interfaces":"320","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.":"5 000","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)":"30 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.":"64","STEP 7 TIA Portal configurable/integrated from version":"see entry ID: 109746275","High demand/continuous mode: PFH in accordance with SIL3":"< 1.00E-09","Number of nodes for user-defined server interfaces, max.":"30 000","Retentive data area (incl. timers, counters, flags), max.":"768 kbyte; In total; available retentive memory for bit memories, timers, counters, DBs, and technology data (axes): 700 KB","Number of nodes of the client interfaces, recommended max.":"5 000","Resistant to commercially available coolants and lubricants":"Yes; Incl. diesel and oil droplets in the air","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.":"20 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","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)","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","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=567483&mlfb=6AG1518-4FP00-4AB0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6AG1518-4FP00-4AB0","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/6AG1518-4FP00-4AB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-06-30T17:56:04.984Z","lastPublished":"2026-06-30T17:56:04.984Z","indexable":true}}