{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6AG1972-0DA00-2AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6AG1972-0DA00-2AA0","canonicalUrl":"https://aoctrl.com/siemens/6AG1972-0DA00-2AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6AG1972-0DA00-2AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 6AG1972-0DA00-2AA0, PROFIBUS RS-485 repeater, 24 VDC, 12 Mbit/s, -40 to 70 °C, IP20, screw terminals, NRND.","salesMarkdown":"## PROFIBUS repeater for extended segments The Siemens 6AG1972-0DA00-2AA0 is a PROFIBUS RS-485 repeater that regenerates signal amplitude and timing on long bus segments or star topologies. It supports the full PROFIBUS transmission rate range from 9.6 kbit/s to 12 Mbit/s, so it fits both legacy 187.5 kbit/s networks and high-speed 12 Mbit/s lines without reconfiguration. Rated for 24 VDC supply with a permissible range of 20.4 V to 28.8 V, it draws 30 mA typical. The supply and PROFIBUS cables both terminate on screw terminal blocks — no special bus connector required, which simplifies field wiring in a panel. ## Wide temperature range and environmental resilience Operating temperature spans -40 °C to 70 °C, making it suitable for unheated enclosures, outdoor cabinets, or cold-chain environments. Altitude derating follows a three-step curve: full temperature range up to 2 000 m, then a 10 K reduction from 2 000 m to 3 500 m, and a 20 K reduction from 3 500 m to 5 000 m. For a high-altitude installation at 3 000 m, the maximum ambient drops to 60 °C. The unit carries conformal coating per IPC-CC-830A Class A and is qualified against ANSI/ISA-71.04 for corrosive gas (Level GX Group A/B), salt spray (LC3), and oil (LB3) — useful for installations near chemical processing or coastal environments. ## NRND — sourcing and replacement path The 6AG1972-0DA00-2AA0 is classified NRND (Not Recommended for New Designs) by Siemens. For new designs or long-term spares planning, the standard Siemens PROFIBUS repeater (the 6ES7972-0DA00-0AA0) is the closest functional equivalent in the S7-300 ecosystem — same 12 Mbit/s rate, same 24 VDC supply, same screw-terminal wiring. The 6AG1 variant adds the wider temperature range and conformal coating; if those environmental margins are not required, the 6ES7 variant is the direct drop-in.","metaTitle":"Siemens 6AG1972-0DA00-2AA0 PROFIBUS RS-485 Repeater, NRND","metaDescription":"Siemens 6AG1972-0DA00-2AA0 PROFIBUS RS-485 repeater, NRND phase-out. 24 VDC, 12 Mbit/s, -40 to 70 °C, IP20. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"Max.":"70 °C","Min.":"-40 °C","Depth":"43 mm","Width":"60 mm","title":"6AG1972-0DA00-2AA0","Height":"70 mm","description":"Siemens 6AG1972-0DA00-2AA0 — now in phase-out and being discontinued. Supplied from remaining channel stock; full specifications, lifecycle and same-series options are below.","Weight, approx.":"95 g","lifecycle_stage":"current","Rated value (DC)":"24 V","IP degree of protection":"IP20","Transmission rate, max.":"12 Mbit/s; 9.6 kbit/s to 12 Mbit/s","Current consumption, typ.":"30 mA","permissible range, lower limit (DC)":"20.4 V","permissible range, upper limit (DC)":"28.8 V","Installation altitude above sea level, max.":"5 000 m","Protection against fouling acc. to EN 60664-3":"Yes; Type 1 protection","Design of electrical connection for supply voltage":"Screw terminal block","Design of electrical connection for PROFIBUS cables":"Screw terminal block","Ambient air temperature-barometric pressure-altitude":"Tmin ... Tmax at 1 140 hPa ... 795 hPa (-1 000 m ... +2 000 m) // Tmin ... (Tmax - 10 K) at 795 hPa ... 658 hPa (+2 000 m ... +3 500 m) // Tmin ... (Tmax -20 K) at 658 hPa ... 540 hPa (+3 500 m ... +5 000 m)","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)","Qualification and Performance of Electrical Insulating Compound for Printed Board Assemblies according to IPC-CC-830A":"Yes; Conformal coating, Class A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$148.13","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0f57156bbd907e0ba8ed0923802ca7e3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=23357&mlfb=6AG1972-0DA00-2AA0"},"ai":{"faq":[{"question":"Is 6AG1972-0DA00-2AA0 obsolete or still available?","answer":"The 6AG1972-0DA00-2AA0 is NRND (Not Recommended for New Designs) — Siemens is phasing it out. Remaining channel stock is available; it is sourced to order against an RFQ. No official successor order code has been published."},{"question":"Does 6AG1972-0DA00-2AA0 work with S7-300 CPU?","answer":"Yes — it is a standard PROFIBUS RS-485 repeater designed for the S7-300 ecosystem. It connects to the PROFIBUS segment via screw terminals and regenerates the bus signal regardless of the master CPU type."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6AG1972-0DA00-2AA0","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/6AG1972-0DA00-2AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:41:02.429Z","lastPublished":"2026-07-20T14:41:02.429Z","indexable":true}}