{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7412-1XJ05-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7412-1XJ05-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7412-1XJ05-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7412-1XJ05-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-400 CPU 412-1, order code 6ES7412-1XJ05-0AB0, 244-byte I/O each direction, CFC/FBD/LAD/SCL/STL/GRAPH, ATEX II 3G Ex nA IIC T4 Gc, cULus, CE.","salesMarkdown":"The Siemens 6ES7412-1XJ05-0AB0 is a CPU 412-1 for the S7-400 rack, supporting 244 bytes each of process input and output image. It handles CFC, FBD, LAD, SCL, STL, and GRAPH programming languages, plus MPI and RS 485 communication. The function manual (FM) is limited by the number of slots and connections in the rack — a constraint that governs how many CPs and FMs you can hang off this CPU before hitting the backplane limit. This CPU carries ATEX II 3G Ex nA IIC T4 Gc certification, cULus, and CE mark. The ATEX rating means it is approved for use in Zone 2 gas environments with non-sparking equipment — relevant if the PLC cabinet sits in a classified area. The cULus mark confirms it meets North American safety standards for industrial control equipment. ## Communication and I/O constraints The CPU supports up to 8 read/write records per interface via SFB 52/53, with a total cap of 32 across all external interfaces. SFC 58/59 for and are limited to 8 per interface. For CP 443-1 Ethernet modules, mixed operation of EX40 with EX41/EX20/GX20 is not allowed; maximum 4 CPs in the central controller. PtP CPs (CP 440, CP 441) are slot- and connection-limited. These limits matter when building a multi-protocol gateway or high-channel-count system — the CPU itself is not the bottleneck, but the backplane and firmware constraints are.","metaTitle":"Siemens 6ES7412-1XJ05-0AB0 CPU 412-1, 244-byte I/O, ATEX II","metaDescription":"Siemens S7-400 CPU 412-1, 244-byte I/O each direction, CFC/FBD/LAD/SCL/STL/GRAPH, ATEX II 3G, cULus, CE. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"FM":"Limited by number of slots and number of connections","CFC":"Yes","FBD":"Yes","LAD":"Yes","MPI":"Yes","SCL":"Yes","STL":"Yes","ATEX":"ATEX II 3G Ex nA IIC T4 Gc","DPV1":"No","Max.":"60 °C","Min.":"0 °C","Type":"SFB","Depth":"219 mm","GRAPH":"Yes","RDREC":"8; SFB 52; per interface, but not more than 32 across all external interfaces","WRREC":"8; SFB 53; per interface, but not more than 32 across all external interfaces","Width":"25 mm","cULus":"Yes","Height":"290 mm","Inputs":"244 byte","Number":"16","Preset":"120","RD_REC":"8; SFC 59; per interface","RS 485":"Yes","STEP 7":"Yes","WR_REC":"8; SFC 58; per interface","via CP":"4; No mixed operation of CP443-1 EX40 and CP443-1 EX 41/EX20/GX20, max. 4 in central controller","CE mark":"Yes","CP, PtP":"CP 440: Limited by number of slots; CP 441: Limited by number of slots and number of connections","Forcing":"Yes","Outputs":"244 byte","Overall":"32","Present":"Yes","RDSYSST":"8; SFC 51","Routing":"Yes; with interface active","WR_PARM":"8; SFC 55; per interface","DPNRM_DG":"8; SFC 13; per interface","DP_TOPOL":"1; SFC 103; per interface","GSD file":"http://support.automation.siemens.com/WW/view/en/113652","Isolated":"Yes","PARM_MOD":"1; SFC 57; per interface","WR_DPARM":"2; SFC 56; per interface","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":"0","Max. Cycle":"32 ms","Resolution":"1 ms","Size, max.":"4 kbyte; Size of bit memory address area","via IM 467":"4","Command set":"see instruction list","FM approval":"Yes","Granularity":"1 h","KC approval":"Yes","Lower Limit":"10 ms","SYNC/FREEZE":"Yes","Single step":"Yes","Slots, max.":"244","UL approval":"Yes","Upper Limit":"9 990 s","CSA approval":"Yes","Equidistance":"Yes","Inputs, max.":"244 byte","Number, max.":"see instruction list","Preset, Max.":"150","Status block":"Yes; Up to 2 simultaneously","With Battery":"Yes; all data","in AS, slave":"Yes","to DP, slave":"Yes","to IF 964 DP":"No","Outputs, max.":"244 byte","Overall, Max.":"256","in AS, master":"Yes","to DP, master":"Yes","to MPI, slave":"Yes","Alarm 8-blocks":"Yes","Interface type":"MPI/PROFIBUS DP","Multicomputing":"Yes; 4 CPUs max. (with UR1 or UR2)","Nesting levels":"7","Per Slot, Max.":"128 byte","Program alarms":"Yes","Required Slots":"1","SCAN procedure":"Yes","Type of memory":"RAM","expandable RAM":"Yes; with Memory Card (RAM)","to MPI, master":"Yes","Can Be Read Out":"Yes","Inputs, default":"128 byte","Range of values":"SFCs 2, 3 and 4: 0 to 32767 hours SFC 101: 0 to 2^31 - 1 hours","Weight, approx.":"700 g","Without Battery":"No","connectable OPs":"31","lifecycle_stage":"mature","Adjustable, Max.":"8 kbyte","Firmware version":"V5.3","Isochronous mode":"Yes","Of Which Central":"2 048","Outputs, default":"128 byte","Power loss, max.":"3 W","Power loss, typ.":"2.5 W","Rated value (DC)":"Power supply via system power supply","S7 communication":"Yes","Backup time, max.":"See reference manual, module data, Chapter 3.3","Data length, max.":"1 452 bytes via CP 443-1 Adv.","Optical interface":"No","PROFIBUS DP slave":"Yes","expandable FEPROM":"Yes; with Memory Card (FLASH)","Address area, max.":"32; Virtual slots","Forcing, variables":"Inputs/outputs, bit memories, distributed I/Os","Inputs, adjustable":"4 kbyte","PROFIBUS DP master":"Yes","Per Priority Class":"24","Retentivity preset":"MB 0 to MB 15","Usable For Routing":"15","Data record routing":"Yes","Interfaces/bus type":"1 x MPI/PROFIBUS DP","Number/Number range":"0 to 15","Outputs, adjustable":"4 kbyte","PG/OP communication":"Yes","Programming package":"STEP 7 V5.3 SP2 or higher with HW update","on Ethernet via NTP":"No; Via CP","Backup current, max.":"300 µA","Backup current, typ.":"125 µA; up to 40 °C","HW functional status":"03","ISO-on-TCP (RFC1006)":"Via CP 443-1 Adv. and loadable FB","In 100 Ms Grid, Max.":"0","In 500 Ms Grid, Max.":"256","Reserved For Routing":"0","Shortest Clock Pulse":"1.5 ms; 0.5 ms without use of SFC 126, 127","Via Interface Module":"0","expandable RAM, max.":"64 Mbyte","integrated RAM, max.":"512 kbyte","Consistent Data, Max.":"244 byte","EAC (formerly Gost-R)":"Yes","In 1000 Ms Grid, Max.":"256","Integrated (For Data)":"144 kbyte","Number of breakpoints":"4","Number of connections":"16","Number of startup OBs":"3; OB 100-102","RCM (formerly C-TICK)":"Yes","Retentivity available":"Yes","S7 basic communication":"No","System functions (SFC)":"see instruction list","With 100 Ms Grid, Max.":"0","Integrated power supply":"No","Number of entries, max.":"200","Status/control variable":"Yes; Up to 16 variable tables","Symbol-related messages":"Yes","Transmission rate, max.":"12 Mbit/s","User data per job, max.":"8 kbyte","expandable FEPROM, max.":"64 Mbyte","For Bit Operations, Typ.":"75 ns","Integrated (For Program)":"144 kbyte","Number of DPV1 alarm OBs":"3; OB 55-57","Number of GD loops, max.":"8","Number of background OBs":"1; OB 90","Number of clock memories":"8; in 1 memory byte","Number of free cycle OBs":"1; OB 1","Number of time alarm OBs":"2; OB 10, 11","Process control messages":"Yes","Size of GD packets, max.":"54 byte","For Word Operations, Typ.":"75 ns","Global data communication":"No","Number of DP slaves, max.":"32","Number of delay alarm OBs":"2; OB 20, 21","Number of variables, max.":"64","Of Which Consistent, Max.":"32 byte","PROFIBUS and Ethernet CPs":"14; Of which 10 CPs max. or IMs as DP master, 4 PROFINET controller maximum","Automatic Baud Rate Search":"No","Hardware clock (real-time)":"Yes","Number of RS 485 interfaces":"1; Combined MPI / PROFIBUS DP","Number of connections, max.":"16; If a diagnostics repeater is used on the line, the number of connection resources on the line is reduced by 1","Number of process alarm OBs":"2; OB 40, 41","Process diagnostic messages":"Yes","S7 communication, as client":"Yes","S7 communication, as server":"Yes","from interface 5 V DC, max.":"90 mA","usable for OP communication":"31","usable for PG communication":"31","usable for S7 communication":"30","Adjustable For Routing, Max.":"0","Mixed mode IM + CP permitted":"No; IM 467 not suitable for use with CP 443-5 Ext. and CP 443-1 EX4x, EX20, GX20 (in PROFINET IO mode)","Number of multicomputing OBs":"1; OB 60","Retentive And Synchronizable":"Yes","System function blocks (SFB)":"see instruction list","User data per DP slave, max.":"244 byte","With 500, 1000 Ms Grid, Max.":"1","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":"2; OB 32, 35 (shortest cycle that can be set = 500 µs)","Number of isochronous mode OBs":"2; OB 61-62","Number of expansion units, max.":"21","Number of synchronous error OBs":"2; OB 121, 122","from backplane bus 5 V DC, max.":"0.6 A","from backplane bus 5 V DC, typ.":"0.5 A","For Fixed Point Arithmetic, Typ.":"75 ns","Number of asynchronous error OBs":"9; OB 80-88","User data per address area, max.":"32 byte","from backplane bus 24 V DC, max.":"150 mA; 150 mA per DP interface","Number of subprocess images, max.":"15","usable for S7 basic communication":"30","Deviation per day (buffered), max.":"1.7 s; Power off","For Floating Point Arithmetic, Typ.":"225 ns","Number of connectable IM 460s, max.":"6","Number of connectable IM 463s, max.":"4; IM 463-2","reserved for S7 basic communication":"0","Activation/deactivation of DP slaves":"Yes","CiR synchronization time, basic load":"100 ms","Deviation per day (unbuffered), max.":"8.6 s; For power On","Number of GD packets, receiver, max.":"16","Output current of the interface, max.":"150 mA","User data per isochronous slave, max.":"244 byte","adjustable for OP communication, max.":"0","adjustable for PG communication, max.":"0","adjustable for S7 communication, max.":"0","Number of GD packets, transmitter, max.":"8","Number of connectable IMs (total), max.":"6","Feeding of external backup voltage to CPU":"5 V DC to 15 V DC","Number of DP masters with isochronous mode":"1","simultaneously active Alarm-S blocks, max.":"250; Simultaneously active alarm_S/SQ blocks or alarm_D/DQ blocks","CiR synchronization time, time per I/O byte":"30 µs","User program protection/password protection":"Yes","adjustable for S7 basic communication, max.":"0","Size of GD packet (of which consistent), max.":"1 variable","User data per job (of which consistent), max.":"240 byte","Number of connectable OPs with message processing":"31; When using Alarm_S/SQ and Alarm_D/DQ","Direct data exchange (slave-to-slave communication)":"No","Number of connectable OPs without message processing":"31","Number of login stations for message functions, max.":"31; Max. 31 with Alarm_S/SQ and Alarm_D/DQ (OPs); max. 8 with Alarm_8 and Alarm_P (e.g. WinCC)","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.":"300","Number of archives that can log on simultaneously (SFB 37 AR_SEND)":"4","number of simultaneously active system functions (SFC) / with DPSYC_FR":"2; SFC 11; per interface","number of simultaneously active system functions (SFC) / with D_ACT_DP":"8; SFC 12; per interface","Number of pluggable S5 modules (via adapter capsule in central device), max.":"6"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$951.92 – $2,839.00","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4313c53bf9c94d38e1fa69476a8e1a07.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=33416&mlfb=6ES7412-1XJ05-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7412-1XJ05-0AB0/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does this CPU carry?","answer":"The CPU carries ATEX II 3G Ex nA IIC T4 Gc, cULus, and CE mark. These cover Zone 2 gas environments, North American safety standards, and European conformity respectively."},{"question":"What is the I/O capacity of this CPU?","answer":"The process image supports 244 bytes of inputs and 244 bytes of outputs. This is the maximum I/O data the CPU can exchange each scan cycle without additional mapping."},{"question":"What programming languages does this CPU support?","answer":"It supports CFC, FBD, LAD, SCL, STL, and GRAPH. This covers both IEC 61131-3 languages and Siemens-specific high-level and graphical tools."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7412-1XJ05-0AB0","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/6ES7412-1XJ05-0AB0 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}}