{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6AG1231-5QD30-4XB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6AG1231-5QD30-4XB0","canonicalUrl":"https://aoctrl.com/siemens/6AG1231-5QD30-4XB0","factsUrl":"https://aoctrl.com/api/mcp/products/6AG1231-5QD30-4XB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 6AG1231-5QD30-4XB0 analog input module, 4-channel thermocouple, 9 TC types plus GOST, ±80 mV range, -40 to 70 °C, IP20, 24 VDC, 1.5 W.","salesMarkdown":"## Thermocouple coverage — nine types plus GOST The 6AG1231-5QD30-4XB0: Four analog inputs, each configurable for thermocouple types J, K, T, E, R, S, N, C, and TXK/XK(L) per GOST, plus a ±80 mV voltage range for direct millivolt signals. No resistance thermometer (RTD) support — this module is thermocouple-only, so a separate RTD input card is needed for Pt100 or Ni100 sensors on the same rack. The integrating measurement principle filters noise on the TC lines, which matters when the cold-junction compensation reference is inside a panel with switching power supplies. ## Diagnostic depth and supply monitoring Alarms, diagnostic alarm, wire-break detection, resistance monitoring, and supply voltage monitoring are all built in — the module flags a thermocouple open-circuit or a 24 VDC dip without polling the field side. Diagnostics can be read out programmatically, and the module reports status of the inputs — useful for a maintenance-oriented line where a failed TC should trigger a message, not a scrap part. ## Power budget and ambient range Draws 40 mA typical from the 24 VDC backplane, with a typical power loss of 1.5 W — the thermal load is low enough that adjacent modules in a dense S7-1200 rack stay within derating. ## Approvals and physical fit Carries CE, FM (Factory Mutual) for hazardous-location installations, and RCM (formerly C-TICK) for Australian EMC compliance — covers the common industrial regulatory jurisdictions. IP20 enclosure, 45 mm wide × 100 mm high × 75 mm deep, and requires a front connector (ordered separately) for field wiring — the connector carries the thermocouple extension wires and the 24 VDC supply.","metaTitle":"Siemens 6AG1231-5QD30-4XB0 4-channel TC module, -40 to 70 °C","metaDescription":"Siemens 6AG1231-5QD30-4XB0 analog input module, 4 thermocouple channels, 9 TC types plus GOST, ±80 mV range, -40 to 70 °C, active production, CE/FM/RCM","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Analog Input Modules"],"specifications":{"Max.":"70 °C","Min.":"-40 °C","Depth":"75 mm","Width":"45 mm","title":"6AG1231-5QD30-4XB0","Alarms":"Yes","Height":"100 mm","Type C":"Yes","Type E":"Yes","Type J":"Yes","Type K":"Yes","Type N":"Yes","Type R":"Yes","Type S":"Yes","Type T":"Yes","CE mark":"Yes","Plastic":"Yes","Resistance":"Yes","Wire-break":"Yes","FM approval":"Yes","description":"***spare part*** SIPLUS S7-1200 SM 1231 TC based on 6ES7231-5QD30-0XB0 with conformal coating, 0…+55 °C, analog input, 4 AI thermocouples","Thermocouple":"Yes; J, K, T, E, R, S, N, C, TXK/XK(L); voltage range: ±80 mV","For Maintenance":"Yes","Parameterizable":"Yes","Weight, approx.":"180 g","lifecycle_stage":"current","-80 mV to +80 mV":"Yes","Diagnostic alarm":"Yes","Power loss, typ.":"1.5 W","Rated value (DC)":"24 V","Fall height, max.":"0.3 m; five times, in product package","Diagnostics function":"Yes; Can be read out","Measurement principle":"integrating","RCM (formerly C-TICK)":"Yes","Resistance thermometer":"No","IP degree of protection":"IP20","Number of analog inputs":"4; Thermocouples","Type TXK/TXK(L) to GOST":"Yes","For Status Of The Inputs":"Yes","Required Front Connector":"Yes","Current consumption, typ.":"40 mA","Monitoring the supply voltage":"Yes","Common mode interference, min.":"120 dB","from backplane bus 5 V DC, typ.":"80 mA","Integration time, parameterizable":"No","Input resistance (-80 mV to +80 mV)":"≥1 MOhm","Temperature error (relative to input range), (+/-)":"25 °C ±0.1%, to 55 °C ±0.2% total measurement range","Ambient air temperature-barometric pressure-altitude":"Tmin ... Tmax at 1 080 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)","Resolution with overrange (bit including sign), max.":"15 bit; + sign","Technical unit for temperature measurement adjustable":"Degrees Celsius/degrees Fahrenheit","Interference voltage suppression for interference frequency f1 in Hz":"85 dB at 50 / 60 / 400 Hz","Permissible Input Voltage For Voltage Input (Destruction Limit), Max.":"±35 V","Repeat accuracy in steady state at 25 °C (relative to output range), (+/-)":"0.5 %"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3f5ba3e156bd805b4abc01359206d29f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=524175&mlfb=6AG1231-5QD30-4XB0"},"ai":{"faq":[{"question":"What thermocouple types does 6AG1231-5QD30-4XB0 support?","answer":"Types J, K, T, E, R, S, N, C, and TXK/XK(L) per GOST, plus a ±80 mV voltage range. No RTD support — this is a thermocouple-only input module."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6AG1231-5QD30-4XB0","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/6AG1231-5QD30-4XB0 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}}