{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6GT2821-5AC40","brand":"Siemens","brandSlug":"siemens","productSlug":"6GT2821-5AC40","canonicalUrl":"https://aoctrl.com/siemens/6GT2821-5AC40","factsUrl":"https://aoctrl.com/api/mcp/products/6GT2821-5AC40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC RF200 RF250R RFID reader, 6GT2821-5AC40, 13.56 MHz, RS232 interface, IP65, 50x50x30 mm, -25 to +70 °C.","salesMarkdown":"The Siemens 6GT2821-5AC40 is a SIMATIC RF200 RF250R RFID reader operating at 13.56 MHz with an RS232 interface. It reads and writes ISO 15693 and ISO 18000-3 transponders (MDS Dxxx types) and connects to PCs and control systems via ASCII or scan mode. The housing is IP65-rated, anthracite PA6.6, sized 50 x 50 x 30 mm, and mounts with two M5 screws. It draws 0.05 A typical at 24 VDC (20.4 to 28.8 V range) and communicates with one external antenna via an M8 4-pin connector. The communications interface to the controller is an M12 8-pin connector. Maximum read/write access per byte is 1.2 ms typical, and the radio transfer rate tops out at 26.5 kbit/s. Maximum read range is 60 mm, though this depends on the transponder type. The RS232 interface supports cable runs up to 30 m. A 3-color LED gives local status indication. The unit is not multitag-capable and is silicon-free. MTBF is listed at 430 years, reflecting solid reliability for a fixed-mount RFID reader in industrial use. ## Integration Notes The IP65 rating means this reader can be mounted directly on a machine frame or conveyor line in washdown areas — no separate enclosure needed. The 50 x 50 x 30 mm footprint and M5 screw mounting make it a straightforward retrofit into existing RFID reader positions. Shock resistance per EN 60721-3-7 Class 7 M2 with 500 m/s² shock acceleration and 200 m/s² vibrational acceleration means it holds up on press lines, palletizers, and other high-vibration machinery.","metaTitle":"Siemens 6GT2821-5AC40 SIMATIC RF250R RFID Reader, 13.56 MHz,","metaDescription":"Siemens 6GT2821-5AC40 SIMATIC RF200 RF250R RFID reader. 13.56 MHz, RS232 interface, IP65, 50x50x30 mm. Mature lifecycle, sourced to order. MTBF 430 y.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["RFID & Auto-ID"],"specifications":{"MTBF":"430 y","Color":"anthracite","Depth":"50 mm","IECEx":"No","Width":"50 mm","at DC":"20.4 ... 28.8 V","Height":"30 mm","Material":"PA6.6","Accessories":"Various antennas are available","During Storage":"-25 ... +80 °C","Display Version":"3-color LED","Range / Maximum":"60 mm; Range is dependent on transponder type: observe http://support.automation.siemens.com/WW/view/en/67384964","lifecycle_stage":"mature","During Operation":"-20 ... +70 °C","During Transport":"-25 ... +80 °C","Fastening Method":"2 x M5 screws","Shock Resistance":"EN 60721-3-7 Class 7 M2","at 24 V / typical":"0.05 A","Shock Acceleration":"500 m/s²","at DC / rated value":"24 V","protection class IP":"IP65","For External Antenna(S)":"M8, 4-pin","Vibrational Acceleration":"200 m/s²","Suitability For Operation":"ISO 15693 transponder (MDS Dxxx), for connecting to PC and control systems (incl. Scan Mode)","Number Of External Antennas":"1","For Communications Interface":"M12, 8-pin","Product Feature / Silicon-Free":"Yes","with RS 232 interface / maximum":"30 m","Operating Frequency / Rated Value":"13.56 MHz","Product Feature / Multitag-Capable":"No","Protocol / With Radio Transmission":"ISO 15693, ISO 18000-3","For Read Access / Per Byte / Typical":"1.2 ms","For Write Access / Per Byte / Typical":"1.2 ms","Standard For Interfaces / For Communication":"RS232","Transfer Rate / With Radio Transmission / Maximum":"26.5 kbit/s"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$257.81","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/436b20569934d43e73a3b578822f3559.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=441364&mlfb=6GT2821-5AC40","alternativesUrl":"https://aoctrl.com/api/mcp/products/6GT2821-5AC40/alternatives.json"},"ai":{"faq":[{"question":"What is the MTBF of 6GT2821-5AC40?","answer":"The listed MTBF is 430 years."},{"question":"What is the operating voltage and current draw?","answer":"Rated 24 VDC (20.4 to 28.8 V range), drawing 0.05 A typical at 24 V."},{"question":"What transponder protocols does it support?","answer":"It supports ISO 15693 and ISO 18000-3 transponders (MDS Dxxx types). Maximum read range is 60 mm, depending on transponder type."},{"question":"What is the maximum cable length for the RS232 interface?","answer":"The RS232 interface supports cable runs up to 30 m."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6GT2821-5AC40","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/6GT2821-5AC40 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}}