{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6AG1541-1AB00-7AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6AG1541-1AB00-7AB0","canonicalUrl":"https://aoctrl.com/siemens/6AG1541-1AB00-7AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6AG1541-1AB00-7AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 6AG1541-1AB00-7AB0 CP 1542-1 communications processor, RS-232/RS-485 interface, 115.2 kbit/s, 8 kbyte buffer, -40 to 70 °C, S7-1500 mounting rail.","salesMarkdown":"## RS-232/485 gateway for S7-1500 racks The 6AG1541-1AB00-7AB0 is a CP 1542-1 communications processor that adds a serial RS-232 or RS-485 interface to a SIMATIC S7-1500 system. It mounts directly on the S7-1500 mounting rail and draws its power from the system backplane, consuming 0.6 W typical. The interface supports 4-wire full-duplex RS-422/485 connections but does not offer 4-wire multipoint mode. Maximum transmission rate is 115.2 kbit/s, with cable runs up to 1,200 m and support for up to 32 slaves on the bus. An 8 kbyte telegram buffer handles message lengths up to 4 kbyte, with configurable parity (none, even, odd, always 1, always 0, any) and stop bits (1 or 2). Fast startup mode is supported, and the module provides diagnostic alarms and wire-break detection. ## Temperature range and installation orientation Rated for -40 °C to 70 °C in horizontal installation, with startup from -25 °C including condensation and frost tolerance. In vertical installation the maximum ambient drops to 40 °C — a derating that matters for cabinets with stacked modules and limited convection. ## Addressing, diagnostics, and LED feedback Supports standard Modbus RTU addressing from 1 to 247 and extended addressing up to 65,535, with 7 or 8 data bits per character. I&M data (I&M 0) is available for asset tracking in TIA Portal. Diagnostics function is built in, with a green RUN LED, yellow LEDs for RxD and TxD activity, and no hardware interrupt capability. Isolation is tested at 500 V between the interface and the backplane. ## Sourcing and lifecycle No direct functional replacement or cross-reference exists for the 3RT5045-1AF00 or 3RV2021-1GA25 — those are motor starters and breakers, not communications processors. The 6AG1541-1AB00-7AB0 is the correct serial interface module for S7-1500 racks requiring RS-232/485 connectivity.","metaTitle":"Siemens 6AG1541-1AB00-7AB0 CP 1542-1, RS-232/485","metaDescription":"Siemens 6AG1541-1AB00-7AB0 CP 1542-1 communications processor, RS-232/485 interface, max. 115.2 kbit/s, -40 to 70 °C, active production, available to order.","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":"127 mm","Width":"35 mm","title":"6AG1541-1AB00-7AB0","Height":"147 mm","Inputs":"8 byte","Parity":"None, even, odd, always 1, always 0, any","RUN LED":"Yes; green LED","I&M data":"Yes; I&M 0","Wire-break":"Yes","Receive RxD":"Yes; Yellow LED","description":"Siemens 6AG1541-1AB00-7AB0 — now in phase-out and being discontinued. Supplied from remaining channel stock; full specifications, lifecycle and same-series options are below.","Address area":"1 to 247, extended 1 to 65535","Fast startup":"Yes","Transmit TxD":"Yes; Yellow LED","Rail mounting":"Yes; S7-1500 mounting rail","Weight, approx.":"0.22 kg","lifecycle_stage":"current","Diagnostic alarm":"Yes","Power loss, typ.":"0.6 W","to SIMATIC S7-300":"Yes","to SIMATIC S7-400":"Yes","Bits per character":"7 or 8","Cable length, max.":"1 200 m","Hardware interrupt":"No","to SIMATIC S7-1500":"Yes","Number of stop bits":"1 or 2 bit","Diagnostics function":"Yes","Isolation tested with":"500 V","Telegram length, max.":"4 kbyte","Number of slaves, max.":"32","Transmission rate, max.":"115.2 kbit/s","Design of the power supply":"system power supply","Buffer memory for telegrams":"8 kbyte","Vertical Installation, Max.":"40 °C","Vertical Installation, Min.":"-40 °C; = Tmin; Startup @ -25 °C","4-Wire Multipoint Connection":"No","4-Wire Full Duplex Connection":"Yes","Horizontal Installation, Max.":"70 °C","Horizontal Installation, Min.":"-40 °C; = Tmin (incl. condensation/frost); start-up @ -25 °C","to standard PROFINET controller":"Yes","Current consumption (rated value)":"33 mA; From the backplane bus","Between Backplane Bus And Interface":"Yes","Power available from the backplane bus":"0.65 W","Number of telegrams which can be buffered":"255","Installation altitude above sea level, max.":"5 000 m","Protection against fouling acc. to EN 60664-3":"Yes; Type 1 protection","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)","STEP 7 TIA Portal configurable/integrated from version":"see entry ID: 109746275","Resistant to commercially available coolants and lubricants":"Yes; Incl. diesel and oil droplets in the air","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/126b2a7ce775a5aba9d0fafaa6bbfdf4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=67936&mlfb=6AG1541-1AB00-7AB0"},"ai":{"faq":[{"question":"What is the maximum cable length for 6AG1541-1AB00-7AB0?","answer":"The maximum cable length is 1,200 m at the rated transmission rate of 115.2 kbit/s, supporting up to 32 slaves on the RS-485 bus."},{"question":"What temperature range does 6AG1541-1AB00-7AB0 support?","answer":"Rated for -40 °C to 70 °C in horizontal installation, with vertical installation derated to 40 °C maximum. Startup from -25 °C is supported including condensation and frost conditions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6AG1541-1AB00-7AB0","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/6AG1541-1AB00-7AB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T15:25:06.138Z","lastPublished":"2026-07-20T15:25:06.138Z","indexable":true}}