{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6AG1151-7FA21-2AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6AG1151-7FA21-2AB0","canonicalUrl":"https://aoctrl.com/siemens/6AG1151-7FA21-2AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6AG1151-7FA21-2AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIPLUS S7-300 DP master module, SFB type, PROFIBUS DP RS485, DPV1, 244 byte I/O, -25 to 60°C, CE.","salesMarkdown":"## Module at a glance The 6AG1151-7FA21-2AB0: This is the Siemens SIPLUS S7-300 PROFIBUS DP master of SFB type – the DP V1 capable, RS485 workhorse for a control rack. It pushes 244 bytes each way per cycle, so it handles a medium-size I/O cluster without breaking a sweat. Rated -25 to 60°C, CE marked, it’s the sort of module you see in plant-floor cabinets that run hot in summer and cold in winter. ## Fits S7-300 hardware, not ET 200SP The 6AG1226-6BA32-5XB0 is an ET 200SP slice – different rail profile, different backplane. This module drops into a standard S7-300 slot: 60 mm wide, 75 mm deep, 119.5 mm high. No, you can’t swap them without a rack change. If your BOM lists the ET 200SP part, this isn’t a plug-in replacement; the wiring and bus connector are also different. ## Programming & diagnostics Choose any of the Siemens IEC languages: LAD, FBD, STL, SCL (with optional CFC and GRAPH). Forcing and alarms are built in. Retentive data must be restarted after a power cycle; the backup battery holds for 6 weeks typical at 40°C. The I2t rating of 0.09 A²·s limits short-circuit energy on the backplane – keep that in mind if you’re populating a new rack.","metaTitle":"Siemens 6AG1151-7FA21-2AB0 DP Master SFB, RS485, DPV1","metaDescription":"Siemens SIPLUS S7-300 DP master module (SFB) with RS485, DPV1, 244 byte I/O, -25 to 60°C, CE. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"CFC":"Yes; Optional","FBD":"Yes","I2t":"0.09 A²·s","LAD":"Yes","MPI":"No","SCL":"Yes; Optional","STL":"Yes","DPV1":"Yes","Max.":"60 °C; = Tmax","Min.":"-25 °C; = Tmin","Type":"SFB","Depth":"75 mm","GRAPH":"Yes; Optional","Width":"60 mm; DP master module: 35 mm","title":"6AG1151-7FA21-2AB0","Alarms":"Yes","Height":"119.5 mm","Inputs":"244 byte","Number":"1","Preset":"10","RS 485":"Yes","TCP/IP":"No","CE mark":"Yes","Forcing":"Yes","Outputs":"244 byte","Overall":"12","Present":"Yes","Routing":"Yes","GSD file":"The latest GSD file is available on the Internet (http://www.siemens.com/profibus-gsd)","Isolated":"Yes","As Client":"No","As Server":"Yes","HiGraph®":"Yes; Optional","Retentive":"Yes; Must be restarted at each restart","Supported":"Yes","Variables":"Inputs, outputs, memory bits, DB, times, counters","Adjustable":"Yes","Expandable":"No","Integrated":"192 kbyte","Size, max.":"256 byte","Backup time":"6 wk; At 40 °C ambient temperature, typically","Command set":"see instruction list","Granularity":"1 h","Lower Limit":"1 ms","STEP 7 Lite":"No","SYNC/FREEZE":"Yes","Single step":"Yes","Upper Limit":"6 000 ms","description":"SIPLUS ET 200S IM 151-7 F-CPU based on 6ES7151-7FA21-0AB0 with conformal coating, -25…+60 °C, ET 200S, 192 KB work memory with integrated PROFIBUS DP Interface (9-pin D-sub, female) AS DP slave, without battery SIMATIC MMC required","Equidistance":"Yes","Inputs, max.":"244 byte","Number, max.":"See S7-300 operation list","Status block":"Yes; Up to 2 simultaneously","in AS, slave":"No","to DP, slave":"Yes","Outputs, max.":"244 byte","Plug-in (MMC)":"Yes","in AS, master":"No","to DP, master":"Yes; With DP slave only slave clock","to MPI, slave":"Yes","Interface type":"External interface via master module 6ES7138-4HA00-0AB0","Nesting levels":"8","to MPI, master":"Yes","Can Be Read Out":"Yes","Inputs, default":"128 byte","Range of values":"0 to 2^31 hours (when using SFC 101)","Weight, approx.":"200 g; DP master module: Approx. 100 g","lifecycle_stage":"current","Block encryption":"Yes; With S7 block Privacy","Firmware version":"V3.3","Isochronous mode":"No","Of Which Central":"124","Outputs, default":"128 byte","Power loss, typ.":"4.2 W","Rated value (DC)":"24 V","S7 communication":"Yes; Only server, configured on one side","PROFIBUS DP slave":"No","Address area, max.":"32","Forcing, variables":"Inputs, outputs","Inputs, adjustable":"2 048 byte","PROFIBUS DP master":"Yes","Per Priority Class":"16","Retentivity preset":"Yes","Usable For Routing":"4; As slave only with active interface, with IM 151-7 CPU as DP master","Configuration rules":"max. 63 peripheral modules per station; station width < 1 m or < 2 m; max. 10 A per load group (power module); master interface module on right next to IM 151-7 CPU (X2 interface)","Data record routing":"Yes; With DP master module","Number/Number range":"0","Outputs, adjustable":"2 048 byte","PG/OP communication":"Yes","Plug-in (MMC), max.":"8 Mbyte","Programming package":"V5.5 + SP1 or higher or V5.2 + SP1 or higher + HSP 219 + Distributed Safety","Diagnostics function":"Yes","Group error SF (red)":"Yes","HW functional status":"01","Inrush current, typ.":"1.8 A","Isolation tested with":"500 V DC","Number of breakpoints":"4","Number of startup OBs":"1; OB 100","Retentivity available":"Yes; MB 0 to MB 255","Retentivity adjustable":"Yes; via non-retain property on DB","S7 basic communication":"Yes; I blocks only","System functions (SFC)":"see instruction list","Deviation per day, max.":"10 s; Typ.: 2 s","IP degree of protection":"IP20","Number of entries, max.":"500","Status/control variable":"Yes","Transmission rate, max.":"12 Mbit/s","User data per job, max.":"See online help of STEP 7 (shared parameters of the SFBs/FBs and of the SFCs/FCs of S7 Communication)","For Bit Operations, Typ.":"0.06 µs","Number of DPV1 alarm OBs":"3; OB 55, 56, 57","Number of GD loops, max.":"8","Number of blocks (total)":"1 024; (DBs, FCs, FBs); the maximum number of loadable blocks can be reduced by the MMC used.","Number of clock memories":"8; 1 memory byte","Number of free cycle OBs":"1; OB 1","Number of time alarm OBs":"1; OB 10","Of Which Powerfail-Proof":"100; Only the last 100 entries are retained","Per Priority Class, Max.":"32 kbyte; Max. 2048 bytes per block","Size of GD packets, max.":"22 byte","For Word Operations, Typ.":"0.12 µs","Global data communication":"No","Number of DP slaves, max.":"32; Per station","Number of delay alarm OBs":"2; OB 20, 21","Number of variables, max.":"10","Point-to-point connection":"No","Automatic Baud Rate Search":"Yes; only with passive interface","Hardware clock (real-time)":"Yes","Number of GD packets, max.":"8","Number of process alarm OBs":"1; OB 40","Process diagnostic messages":"Yes; ALARM_S, ALARM_SC, ALARM_SQ, ALARM_D, ALARM_DQ","Reverse polarity protection":"Yes; against destruction","S7 communication, as client":"No","S7 communication, as server":"Yes","usable for OP communication":"11","usable for PG communication":"11","Retentive And Synchronizable":"Yes","System function blocks (SFB)":"see instruction list","Length of mounting rail, max.":"Station width: ≤ 1 m or < 2 m","additional within an error OB":"4","from supply voltage 1L+, max.":"320 mA; 410 mA with DP master module","reserved for OP communication":"1","reserved for PG communication":"1","Cycle Monitoring Time / Preset":"150 ms","Number of cyclic interrupt OBs":"4; OB 32, 33, 34, 35","Number of synchronous error OBs":"2; OB 121, 122","Of Which Status Variables, Max.":"30","For Fixed Point Arithmetic, Typ.":"0.16 µs","Number of asynchronous error OBs":"6; OB 80, 82, 83 (for centralized I/O only, not for distributed I/O), 85, 86, 87","Of Which Control Variables, Max.":"14","User data per address area, max.":"32 byte; Up to max. size of the transfer memory","for backplane bus (5 V DC), max.":"700 mA","usable for S7 basic communication":"10","Number of modules per system, max.":"63; Centralized","For Floating Point Arithmetic, Typ.":"0.59 µs","permissible range, lower limit (DC)":"19.2 V","permissible range, upper limit (DC)":"28.8 V","reserved for S7 basic communication":"0","Activation/deactivation of DP slaves":"Yes","Number of GD packets, receiver, max.":"8","Output current of the interface, max.":"No","adjustable for OP communication, max.":"11","adjustable for OP communication, min.":"1","adjustable for PG communication, max.":"11","adjustable for PG communication, min.":"1","Number of GD packets, transmitter, max.":"8","Number of entries readable in RUN, max.":"499","Behavior of the clock following POWER-ON":"Clock continues running after POWER OFF","Mains/voltage failure stored energy time":"5 ms","Monitoring 24 V voltage supply ON (green)":"Yes","Number of mounting rails that can be used":"1","simultaneously active Alarm-S blocks, max.":"300","Installation altitude above sea level, max.":"2 000 m","User program protection/password protection":"Yes","adjustable for S7 basic communication, max.":"10","adjustable for S7 basic communication, min.":"0","Size of GD packet (of which consistent), max.":"22 byte","User data per job (of which consistent), max.":"See online help of STEP 7 (shared parameters of the SFBs/FBs and of the SFCs/FCs of S7 Communication)","Direct data exchange (slave-to-slave communication)":"Yes","Ambient air temperature-barometric pressure-altitude":"Tmin ... Tmax at 1 140 hPa ... 795 hPa (-1 000 m ... +2 000 m)","Number of login stations for message functions, max.":"12; Depending on the configured connections for PG/OP and S7 basic communication","between PROFIBUS DP and all other circuit components":"Yes","Data management on MMC (after last programming), min.":"10 a","Behavior of the clock following expiry of backup period":"the clock continues at the time of day it had when power was switched off","Retentive data area (incl. timers, counters, flags), max.":"64 kbyte","External Protection For Power Supply Lines (Recommendation)":"24 V DC/16 A miniature circuit breaker with type B and C tripping characteristics. Note: A 24 V DC/16 A miniature circuit breaker with type B tripping characteristics trips before and with type C tripping characteristic after the device protection fuse.","Number of DP slaves 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)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a8a36b8f10a30a3bcb80310048e52ad2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=142775&mlfb=6AG1151-7FA21-2AB0"},"ai":{"faq":[{"question":"What CFC capability does this module list?","answer":"CFC is listed as Yes; Optional, meaning the software option is available but not bundled."},{"question":"What FBD support is documented?","answer":"FBD is listed as Yes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6AG1151-7FA21-2AB0","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/6AG1151-7FA21-2AB0 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}}