{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6GT2821-7AC12","brand":"Siemens","brandSlug":"siemens","productSlug":"6GT2821-7AC12","canonicalUrl":"https://aoctrl.com/siemens/6GT2821-7AC12","factsUrl":"https://aoctrl.com/api/mcp/products/6GT2821-7AC12","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC RF200 RF285R RFID reader, 6GT2821-7AC12, 13.56 MHz, RS232, IP65, 550 mm range.","salesMarkdown":"The Siemens 6GT2821-7AC12 is an RF285R reader from the SIMATIC RF200 family, operating at 13.56 MHz with an RS232 serial interface. It reads and writes ISO 15693 and ISO 18000-3 transponders, with a typical read/write access time of 0.6 ms per byte. The reader is multitag-capable and achieves a maximum transfer rate of 26.5 kbit/s over the air interface. Range is adjustable via transmission power and depends on the transponder type, with a maximum of 550 mm. It supports one external antenna via a TNC connector, with antenna cable lengths from 3.3 m to 25 m. The RS232 interface can be extended up to 30 m. Power is supplied through an 8-pin M12 connector at 24 VDC nominal (21.6 to 26.4 V range), drawing 0.4 A typical, 0.5 A maximum. The housing is aluminum, silver/anthracite, rated IP65 for washdown environments. The enclosure measures 200 mm wide × 80 mm high × 140 mm deep. Shock resistance per EN 60721-3-7 Class 7M2 (300 m/s²), vibration 20 m/s². The RS232 interface and power share the same 8-pin M12 connector — confirm pinout against your cable assembly before wiring. The reader is suited for connecting to PC systems and operates with ISO 15693 transponders (MDS Dxxx family).","metaTitle":"Siemens 6GT2821-7AC12 RF285R RFID Reader, 13.56 MHz, RS232","metaDescription":"SIMATIC RF200 RF285R RFID reader, 13.56 MHz, RS232 interface, IP65, 550 mm range, mature lifecycle, sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["RFID & Auto-ID"],"specifications":{"MTBF":"18 a","Color":"silver/anthracite","Depth":"140 mm","IECEx":"No","Width":"200 mm","at DC":"21.6 ... 26.4 V","Height":"80 mm","Material":"aluminum","Accessories":"Various antennas available, antenna combiner, mounting set for DIN rail mounting","During Storage":"-25 ... +85 °C","Display Version":"4 LEDs","Range / Maximum":"550 mm; Range adjustable in reader via transmission power, range is dependent on transponder type: observe http://support.automation.siemens.com/WW/view/en/67384964","lifecycle_stage":"mature","During Operation":"-20 ... +55 °C","During Transport":"-25 ... +85 °C","Fastening Method":"4 M4 screws, DIN rail 35 mm, S7-300 mounting rail","Shock Resistance":"EN 60721-3-7 Class 7 M2","at 24 V / maximum":"0.5 A","at 24 V / typical":"0.4 A","For Supply Voltage":"M12, 8-pin","Shock Acceleration":"300 m/s²","at DC / rated value":"24 V","protection class IP":"IP65","For External Antenna(S)":"TNC","Vibrational Acceleration":"20 m/s²","Suitability For Operation":"ISO 15693 Transponder (MDS Dxxx), for connecting to PC systems","Of Antenna Cable / Maximum":"25 m","Of Antenna Cable / Minimum":"3.3 m","Number Of External Antennas":"1","For Communications Interface":"M12, 8-pin","Type Of Electrical Connection":"M12, 8-pin","with RS 232 interface / maximum":"30 m","Operating Frequency / Rated Value":"13.56 MHz","Product Feature / Multitag-Capable":"Yes","Protocol / With Radio Transmission":"ISO 15693, ISO 18000-3","For Read Access / Per Byte / Typical":"0.6 ms","For Write Access / Per Byte / Typical":"0.6 ms","Standard For Interfaces / For Communication":"RS232","Transfer Rate / With Radio Transmission / Maximum":"26.5 kbit/s"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1093526&mlfb=6GT2821-7AC12","alternativesUrl":"https://aoctrl.com/api/mcp/products/6GT2821-7AC12/alternatives.json"},"ai":{"faq":[{"question":"What is the read range of this reader?","answer":"Maximum range is 550 mm, adjustable via transmission power. Actual range depends on the specific transponder type used."},{"question":"What protocols does it support?","answer":"It supports ISO 15693 and ISO 18000-3 over the air, with an RS232 interface for host communication."},{"question":"What is the IP rating and environmental tolerance?","answer":"Rated IP65 for dust and water ingress protection. Operating temperature -20 to +55 °C, storage/transport -25 to +85 °C. Shock 300 m/s², vibration 20 m/s²."},{"question":"Can it be mounted on DIN rail?","answer":"Yes, it mounts on 35 mm DIN rail, S7-300 mounting rail, or via 4x M4 screws."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6GT2821-7AC12","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/6GT2821-7AC12 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}}