{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7516-3TN00-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7516-3TN00-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7516-3TN00-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7516-3TN00-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 6ES7516-3TN00-0AB0 — now in phase-out and being discontinued. Supplied from remaining channel stock; full specifications, lifecycle and same-series options are below.","salesMarkdown":"This CPU handles the full feature set: the 32 kbyte input and 32 kbyte output process image sizes define the maximum I/O data that can be exchanged each cycle — enough for a mid-sized machine cell with several distributed racks. The single PROFINET port supports MRP (Media Redundancy Protocol) with MRP Automanager and MRP Manager roles per IEC 62439-2 Edition 2.0, plus MRP Client, enabling ring topologies for network resilience. MODBUS TCP is built in, so the CPU can talk directly to drives, HMIs, and third-party devices without an additional gateway. Up to eight communication modules or CPs (PROFIBUS, PROFINET, Ethernet) can be inserted via the backplane, extending connectivity beyond the onboard port. The RS-485 port on X3 provides a serial drop for legacy fieldbus devices or point-to-point links, while the PROFINET interface handles real-time motion control and I/O synchronization. The CPU supports IPv4, DHCP, DCP, LLDP, SNMP, and HTTP/HTTPS for standard and user pages, making it manageable in a modern IT/OT network. ## Applications The CPU 1516T-3 PN/DP is specified for machine and plant automation where deterministic motion control and high-speed I/O are required — packaging lines, printing presses, material handling, and assembly cells. Its MRP support suits ring-topology PROFINET networks in continuous-process plants where a single cable break cannot stop production. The MODBUS TCP capability also makes it a natural fit for retrofits where existing equipment speaks MODBUS. Within the family, the 1516T-3 PN/DP sits above the standard 1516-3 PN/DP by adding technology functions for motion control (the 'T' designation). It targets machine builders who need coordinated axis control without stepping up to the high-end 1517T or 1518T CPUs. The ability to insert up to eight communication modules gives it the flexibility to integrate PROFIBUS segments or additional PROFINET networks alongside the onboard port. The 6ES7516-3TN00-0AB0 carries a RoHS compliance date of 19-01-18, indicating it has been in production for several years. No end-of-life or phase-out notice is recorded in the available evidence; the CPU remains an active catalog item from Siemens. Sourcing is through standard distribution channels; lead time and availability should be confirmed via RFQ.","metaTitle":"Siemens 6ES7516-3TN00-0AB0 CPU 1516T-3 PN/DP, 32 kbyte I/O, 24 W","metaDescription":"Siemens CPU 1516T-3 PN/DP (6ES7516-3TN00-0AB0): 32 kbyte input/output process image, 1 PROFINET port, RS-485 X3, MRP, MODBUS TCP, 24 W, 175x147x129 mm.","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","I2t":"0.4 A²·s","IRT":"No","LAD":"Yes","MRP":"Yes; MRP Automanager according to IEC 62439-2 Edition 2.0, MRP Manager; 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","Height":"147 mm","Inputs":"32 kbyte; All inputs are in the process image","MODBUS":"Yes; MODBUS TCP","Number":"16","RS 485":"Yes; X3","TCP/IP":"Yes","Via CM":"8; A maximum of 8 CMs/CPs (PROFIBUS, PROFINET, Ethernet) can be inserted in total","Forcing":"Yes","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":"No","Per Probe":"40","Supported":"Yes","Variables":"Inputs/outputs, memory bits, DBs, distributed I/Os, timers, 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","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","OPC UA Client":"Yes; Data Access (registered Read/Write), Method Call","OPC UA Server":"Yes; Data Access (Read, Write, Subscribe), Method Call, Alarms & Condition (A&C), Custom Address Space","Per Cam Track":"160","Shared device":"Yes","UDP multicast":"Yes; Max. 5 multicast circuits","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.":"1 929 g","lifecycle_stage":"current","Block protection":"Yes","Firmware version":"V3.0","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; X2","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, Aes128Sha256RsaOaep, Aes256Sha256RsaPss","Forcing, variables":"Peripheral inputs/outputs","High-speed counter":"Yes","PROFIBUS DP master":"Yes","PROFINET IO Device":"Yes","Per Priority Class":"24","Retentivity preset":"No","Data record routing":"Yes","PG/OP communication":"Yes; encryption with TLS V1.3 pre-selected","Prioritized startup":"No","User authentication":"\"anonymous\" or by user name & password","on Ethernet via NTP":"Yes","Direct data exchange":"No","HW functional status":"FS11","ISO-on-TCP (RFC1006)":"Yes","Inrush current, max.":"1.9 A; Rated value","Mode selector switch":"1","Number of IO modules":"8 192; 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","Alarms and Conditions":"Yes","Integrated (For Data)":"7.5 Mbyte","Number of breakpoints":"8","Number of lines, max.":"1","Number of startup OBs":"100","Open IE communication":"Yes; Optionally also encrypted","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.":"32","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.":"3 200","Sampling interval, min.":"100 ms","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.":"6 ns","Integrated (For Program)":"3 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":"1 000","Number of sessions, max.":"48","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; \"Medium\" license required","Current consumption, max.":"1.55 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.":"7 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.":"100 ms","Application authentication":"Yes","For Each Set Of Kinematics":"30","Number of S7 routing paths":"16","Number of elements (total)":"8 000; Blocks (OB, FB, FC, DB) and UDTs","Number of connections, max.":"10","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":"2","Number of configurable Traces":"4; Up to 512 KB of data per trace are possible","Industrial Ethernet status LED":"Yes","MRP interconnection, supported":"Yes; as MRP ring node according to IEC 62439-2 Edition 3.0","Number of cyclic interrupt OBs":"20; With minimum OB 3x cycle of 250 µs","Number of diagnostic alarm OBs":"1","Number of isochronous mode OBs":"3","Number of server methods, max.":"50","Number of synchronous error OBs":"2","Of Which Status Variables, Max.":"200; per job","For Fixed Point Arithmetic, Typ.":"9 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)":"1.2 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.":"20 000","Of which IO devices with IRT, max.":"64","Protection level: Write protection":"Yes","For Floating Point Arithmetic, Typ.":"37 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; 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.":"100 000","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.":"32; In total, up to 1 000 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":"200","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.":"50","Number of technology synchronous alarm OBs":"2","Installation altitude above sea level, max.":"5 000 m; Restrictions for installation altitudes > 2 000 m, see manual","Number of monitored items, recommended max.":"4 000; 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.":"32","Number of connections reserved for ES/HMI/web":"10","Protection Of Confidential Configuration Data":"Yes","Number of alarms for motion technology objects":"480","Number of connections via integrated interfaces":"128","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","Number of login stations for message functions, max.":"64","STEP 7 TIA Portal configurable/integrated from version":"V18 (FW V3.0) / V15 (FW V2.5) or higher","Number of nodes for user-defined server interfaces, max.":"30 000","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","Number of nodes of the client interfaces, recommended max.":"2 000","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.":"7.5 Mbyte; When using PS 6 0W 24/48/60 V DC HF","Number of available Motion Control resources for technology objects":"6 400","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)":"55","Number of positioning axes at motion control cycle of 8 ms (typical value)":"80","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":"192","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":"$3,583.94","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ce9ac6d45726561f85da09d9c983a054.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1091591&mlfb=6ES7516-3TN00-0AB0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7516-3TN00-0AB0","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/6ES7516-3TN00-0AB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-06-26T19:24:34.313Z","lastPublished":"2026-06-26T19:24:34.313Z","indexable":true}}