{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7412-3HJ14-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7412-3HJ14-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7412-3HJ14-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7412-3HJ14-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-400H fault-tolerant CPU, order code 6ES7412-3HJ14-0AB0, supports 4096 digital I/O, 8 SFBs, LAD/FBD/STL/SCL/GRAPH/CFC/HiGraph programming.","salesMarkdown":"## CPU for fault-tolerant systems The Siemens 6ES7412-3HJ14-0AB0 is a CPU for the S7-400H fault-tolerant automation system, designed for redundant, high-availability control in continuous-process plants, power generation, or critical infrastructure where a single-point failure must not stop the line. It supports up to 4096 digital inputs and 4096 digital outputs, with a total of 8 system function blocks (SFBs) available for diagnostics, data record handling, and parameter assignment. Programming can be done in LAD, FBD, STL, SCL, GRAPH, CFC, and HiGraph, giving the engineering team flexibility across legacy and modern codebases. ## System integration and I/O capacity Module occupies a single slot, measuring 50 mm wide, 290 mm tall, and 219 mm deep. Communication is via MPI (max. 200 ms transmission time), RS 485, and routing is supported for multi-network access. Up to 10 connections are available via CP and PtP modules, though the exact count is limited by slot availability in the rack — refer to the S7-400H manual for the specific configuration. Forcing, retentive data storage, and preset values (120) are supported for commissioning and fail-safe operation.","metaTitle":"6ES7412-3HJ14-0AB0 Siemens S7-400H CPU, fault-tolerant, 4096","metaDescription":"Siemens 6ES7412-3HJ14-0AB0 S7-400H CPU for fault-tolerant systems. Supports LAD, FBD, STL, SCL, GRAPH, CFC. 4096 digital inputs/outputs. Sourced to order. Request RFQ for availabil","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"FM":"See manual Automation System S7-400H fault-tolerant systems. Limited by number of slots and number of connections","CFC":"Yes","FBD":"Yes","LAD":"Yes","MPI":"Yes","SCL":"Yes","STL":"Yes","Type":"SFB","Depth":"219 mm","GRAPH":"Yes","RDREC":"8","WRREC":"8","Width":"50 mm","Height":"290 mm","Inputs":"4 096","Number":"8","Preset":"120","RD_REC":"8","RS 485":"Yes","STEP 7":"Yes","WR_REC":"8","via CP":"10","CP, PtP":"See manual Automation System S7-400H fault-tolerant systems. Limited by number of slots and number of connections","Forcing":"Yes","Outputs":"4 096","Overall":"16","Present":"Yes","RDSYSST":"8","Routing":"Yes","WR_PARM":"8","DPNRM_DG":"8","DP_TOPOL":"1","Isolated":"Yes","PARM_MOD":"1","WR_DPARM":"2","As Client":"Yes","As Server":"Yes","HiGraph®":"Yes","MPI, max.":"200 ms","Retentive":"Yes","Supported":"Yes; Via CP and loadable FB","Variables":"Inputs/outputs, memory bits, DBs, distributed I/Os, timers, counters","Adjustable":"Yes","Expandable":"No","Integrated":"1","Resolution":"1 ms","S7 routing":"Yes","Size, max.":"8 kbyte","Command set":"see instruction list","Granularity":"1 h","Lower Limit":"10 ms","SYNC/FREEZE":"No","Single step":"Yes","Slots, max.":"244","Upper Limit":"9 990 s","Equidistance":"No","Inputs, max.":"244 byte","Number, max.":"2 048; Number range: 0 to 2047","Preset, Max.":"300","Status block":"Yes","With Battery":"Yes; all data","in AS, slave":"Yes","to DP, slave":"Yes","Outputs, max.":"244 byte","in AS, master":"Yes","to DP, master":"Yes","to MPI, slave":"Yes","Alarm 8-blocks":"Yes","Interface type":"Pluggable synchronization submodule (FO)","Multicomputing":"No","Nesting levels":"8","Per Slot, Max.":"128 byte","Program alarms":"Yes","Required Slots":"2","Type of memory":"RAM","expandable RAM":"Yes","to MPI, master":"Yes","Inputs, default":"256 byte","Range of values":"0 to 32767 hours","Weight, approx.":"990 g","Without Battery":"No","connectable OPs":"15 without message processing, 8 with message processing","lifecycle_stage":"mature","Adjustable, Max.":"16 kbyte","Firmware version":"V4.5","Isochronous mode":"No","Of Which Central":"4 096","Outputs, default":"256 byte","Power loss, typ.":"5.5 W","Rated value (DC)":"Power supply via system power supply","S7 communication":"Yes","Backup time, max.":"Dealt with in the module data manual with the secondary conditions and the factors of influence","Optical interface":"No","PROFIBUS DP slave":"No","expandable FEPROM":"Yes","Forcing, variables":"Inputs/outputs, bit memories, distributed I/Os","Inputs, adjustable":"8 kbyte","PROFIBUS DP master":"Yes","Per Priority Class":"24","Retentivity preset":"MB 0 to MB 15","Number/Number range":"0 to 7","Outputs, adjustable":"8 kbyte","PG/OP communication":"Yes","Programming package":"STEP 7 V5.3 SP2 or higher with HW update","Backup current, max.":"660 µA","Backup current, typ.":"190 µA; Valid up to 40°C","HW functional status":"1","Reserved For Routing":"0","Via Interface Module":"0","expandable RAM, max.":"64 Mbyte","integrated RAM, max.":"256 kbyte","Consistent Data, Max.":"244 byte","Integrated (For Data)":"256 kbyte","Number of breakpoints":"4","Number of connections":"No configuration of CPU as DP slave","Retentivity available":"Yes","S7 basic communication":"No","System functions (SFC)":"see instruction list","Number of entries, max.":"3 200","Status/control variable":"Yes","Symbol-related messages":"No","Transmission rate, max.":"12 Mbit/s","User data per job, max.":"8 kbyte","expandable FEPROM, max.":"64 Mbyte","For Bit Operations, Typ.":"0.075 µs","Integrated (For Program)":"512 kbyte","Number of clock memories":"8; in 1 memory byte","Number of time alarm OBs":"4","Process control messages":"Yes","For Word Operations, Typ.":"0.075 µs","Global data communication":"No","Number of DP slaves, max.":"32","Number of delay alarm OBs":"4","Number of variables, max.":"256","PROFIBUS and Ethernet CPs":"14; Of which max. 10 CP as DP master","Plug-in interface modules":"Synchronization submodule IF 960 6ES7960-1AA04-0XA0","Hardware clock (real-time)":"Yes","Number of other interfaces":"0","Number of RS 485 interfaces":"2","Number of connections, max.":"16","Number of process alarm OBs":"4","from interface 5 V DC, max.":"90 mA; At each DP interface","Adjustable For Routing, Max.":"0","Mixed mode IM + CP permitted":"No","Retentive And Synchronizable":"Yes","System function blocks (SFB)":"see instruction list","User data per DP slave, max.":"244 byte","additional within an error OB":"1","reserved for OP communication":"1","reserved for PG communication":"1","reserved for S7 communication":"0","Number of cyclic interrupt OBs":"4","Number of expansion units, max.":"21","from backplane bus 5 V DC, max.":"1.5 A","from backplane bus 5 V DC, typ.":"1.2 A","For Fixed Point Arithmetic, Typ.":"0.075 µs","from backplane bus 24 V DC, max.":"150 mA; Per DP interface","Number of subprocess images, max.":"15","Deviation per day (buffered), max.":"1.7 s; Power off","For Floating Point Arithmetic, Typ.":"0.225 µs","Number of connectable IM 460s, max.":"6","Number of connectable IM 463s, max.":"4; Single mode only","reserved for S7 basic communication":"0","Activation/deactivation of DP slaves":"No","CiR synchronization time, basic load":"150 ms","Deviation per day (unbuffered), max.":"8.6 s; Power on","Output current of the interface, max.":"150 mA","adjustable for OP communication, max.":"0","adjustable for PG communication, max.":"0","adjustable for S7 communication, max.":"0","Number of connectable IMs (total), max.":"6","Feeding of external backup voltage to CPU":"5 V DC to 15 V DC","simultaneously active Alarm-S blocks, max.":"100","CiR synchronization time, time per I/O byte":"40 µs","User program protection/password protection":"Yes","adjustable for S7 basic communication, max.":"0","User data per job (of which consistent), max.":"240 byte","Number of connectable OPs with message processing":"8","Direct data exchange (slave-to-slave communication)":"No","Number of connectable OPs without message processing":"15","Number of login stations for message functions, max.":"8","Retentive data area (incl. timers, counters, flags), max.":"Total working and load memory (with backup battery)","Number of simultaneous AG-SEND/AG-RECV orders per CPU, max.":"24/24","Number of instances for alarm 8 and S7 communication blocks, max.":"600","Number of archives that can log on simultaneously (SFB 37 AR_SEND)":"16"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3,228.98 – $4,973.00","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4f6f83ddea42fa2038ec94527c96b46f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=402785&mlfb=6ES7412-3HJ14-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7412-3HJ14-0AB0/alternatives.json"},"ai":{"faq":[{"question":"Will this CPU drop into a panel built for a different S7-400 CPU?","answer":"The 50 mm width and 290 mm height match the standard S7-400 rack footprint. Slot assignment and backplane bus are identical across the S7-400H family, so it fits existing racks without mechanical modification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7412-3HJ14-0AB0","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/6ES7412-3HJ14-0AB0 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}}