{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1405-2BG00-2AA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1405-2BG00-2AA2","canonicalUrl":"https://aoctrl.com/siemens/3RK1405-2BG00-2AA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1405-2BG00-2AA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens Slimline Compact I/O module, AS-i SC17.5F, 2F-DI/2DQ, 2 safety-related digital inputs, 2 PNP transistor outputs, IP20, 17.5 mm wide.","salesMarkdown":"## What this AS-i safety module does The Siemens 3RK1405-2BG00-2AA2 is a Slimline Compact I/O module designed for control-cabinet use, carrying the AS-i SC17.5F design with 2 fail-safe digital inputs and 2 PNP transistor outputs. It is a standard AS-i slave with profile S-7.B.F, addressable via the front socket. The module provides built-in induction protection and short-circuit-proof outputs. This module is rated up to Category 4 per EN ISO 13849-1, with a safe failure fraction (SFF) of 99 %. That means it can be used in the highest-performance safety functions — emergency stop, light curtain monitoring, two-hand control — where a single fault cannot lead to loss of the safety function. The two safety-related inputs accept mechanical contacts and are monitored for cross-faults. The 99 % SFF indicates a very low probability of dangerous undetected failures, which is what you need for SIL 3 loops. ## Power supply and current draw The module draws 0.2 A when supplied via the AS-Interface bus, or 0.5 A when supplied via the auxiliary Uaux terminal. An external auxiliary feed of 20 to 30 V DC is required for the output circuits, and must comply with IEC 60990 (PELV), protection class III. The auxiliary supply can deliver up to 4 A total. At 30 V the module draws a maximum of 270 mA; at 24 V with AS-i Power24V the same 270 mA limit applies. The AS-Interface bus itself is rated for 2 A. ## Mechanical fit and panel integration At just 17.5 mm wide — a standard single-module width on DIN rail — this module fits tight enclosures where every millimeter counts. Height is 100 mm, depth 120 mm. The screw terminals accept solid or stranded conductors: 1x or 2x 0.5 to 1.5 mm² solid, or 1x or 2x 20 to 16 AWG stranded. Finely stranded wire with ferrules is also supported at 0.25 to 1.0 mm². ## Environmental limits and shock The module withstands 15 g / 11 ms shock (modules alone) or 10 g / 11 ms with the device connector attached. These numbers matter if the cabinet is on a machine with vibration or if the panel is transported pre-wired.","metaTitle":"Siemens 3RK1405-2BG00-2AA2 Safety I/O Module, AS-i SC17.5F","metaDescription":"Siemens 3RK1405-2BG00-2AA2 Slimline safety I/O module with 2 safety-related inputs and 2 PNP outputs. AS-i SC17.5F design, IP20, up to Category 4 / SIL 3. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Note":"0.2 A with supply via AS interface / 0.5 A with supply via Uaux","Depth":"120 mm","Solid":"1x (0.5 ... 1.5 mm²), 2x (0.5 ... 1.5 mm²)","Width":"17.5 mm","title":"3RK1405-2BG00-2AA2","Height":"100 mm","ID1 code":"F; Factory setting, changeable","description":"ASIsafe SlimLine Compact module SC17.5F digital safety 2 F-DI/2 DQ, IP20 2 x input for mechanical sensors 2 x standard output 24 V DC Output supply can be switched spring-type terminals Width 17.5 mm","During Storage":"-40 ... +85 °C","at 30 V maximum":"270 mA","lifecycle_stage":"current","During Operation":"-25 ... +70 °C","Fastening Method":"screw and snap-on mounting","Product Function":"Built-in induction protection","Shock Resistance":"15g / 11 ms (modules) or 10g / 11 ms (modules with device connector)","for AS-Interface":"2 A","Other Information":"An auxiliary external feed (AUX POWER) of between 20 and 30 V DC is necessary for supplying the output circuits. The auxiliary feed must comply with IEC 60990 (PELV), protection class III.","Product Designation":"Slimline Compact I/O module for use in the control cabinet","protection class IP":"IP20","for AWG cables solid":"1x (20 ... 16), 2x (20 ... 16)","Design Of The Product":"AS-i SC17.5F, 2F-DI/2DQ","Number Of Analog Inputs":"0","according to EN 61346-2":"K","for AWG cables stranded":"1x (20 ... 16), 2x (20 ... 16)","Design Of The Slave Type":"standard slave","Number Of Analog Outputs":"0","Number Of Digital Inputs":"0","Type Of Switching Output":"PNP transistor","Number Of Digital Outputs":"2","AS-Interface slave profile":"S-7.B.F","Safe failure fraction (SFF)":"99 %","Type Of Input Characteristic":"mechanical contacts","For External Auxiliary Voltage":"4 A","at 24 V with AS-i Power24V maximum":"270 mA","category according to EN ISO 13849-1":"up to Category 4","Type Of Voltage Supply At The Outputs":"AS interface / U_AUX switchable","type of address setting of AS-i slaves":"via front addressing socket","As Status Display Of The Inputs/Outputs":"LED yellow/red","Number Of Digital Inputs Safety-Related":"2","Finely Stranded With Core End Processing":"1x (0,25 ... 1,0 mm²), 2x (0,25 ... 1,0 mm²)","Property Of The Output Short-Circuit Proof":"Yes","Finely Stranded Without Core End Processing":"1x (0.5 ... 1.5 mm²), 2x (0.5 ... 1.5 mm²)","product function suitable for AS-i Power24V":"Yes","protocol is supported AS-Interface protocol":"Yes","PFHD with high demand rate according to EN 62061":"4.5E-9 1/h","PFDavg with low demand rate according to IEC 61508":"5E-6","performance level (PL) according to EN ISO 13849-1":"e","Total Current Of Digital Outputs Per Module Maximum":"0.5 A","ampacity of the semiconductor output at DC-13 at 24 V":"0.5 A; 0.15 A with supply via AS interface / 0.5 A with supply via Uaux","Type Of Electrical Connection Of The Inputs And Outputs":"Spring-loaded terminals","operating voltage according to AS-Interface specification":"18 ... 31.6 V","Product Function For Power Supply Reverse Polarity Protection":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d6741cc5aa2048d7560d2468f54ac1e3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=552918&mlfb=3RK1405-2BG00-2AA2"},"ai":{"faq":[{"question":"What are the key ratings for this module?","answer":"It provides 2 safety-related digital inputs and 2 PNP transistor outputs, rated up to Category 4 per EN ISO 13849-1 with a 99 % safe failure fraction. It draws 0.2 A via AS-i or 0.5 A via Uaux. The module is 17.5 mm wide and IP20 rated."},{"question":"What auxiliary power does this module need?","answer":"An external auxiliary feed of 20 to 30 V DC is required for the output circuits, complying with IEC 60990 (PELV), protection class III. The auxiliary supply is rated for up to 4 A."},{"question":"What is the AS-i slave profile?","answer":"The module has AS-Interface slave profile S-7.B.F and is a standard slave. The ID1 code is F, factory-set but changeable."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1405-2BG00-2AA2","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/3RK1405-2BG00-2AA2 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}}