{"product_id":"6es7431-7kf00-0ab0-siemens-s7-400-analog-input-module","title":"6ES7431-7KF00-0AB0 Siemens S7-400 - Analog Input Module","description":"\u003ch2\u003e\u003cstrong\u003e6ES7431-7KF00-0AB0 — Siemens SIMATIC S7-400 Analog Input Module SM 431\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Technical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Siemens — a trusted name in industrial automation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003e6ES7431-7KF00-0AB0\u003c\/strong\u003e — part of the SIMATIC S7-400 family.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Analog input module SM 431, isolated, 8 AI channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution:\u003c\/strong\u003e 16-bit with overrange, including sign bit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConversion time:\u003c\/strong\u003e 20 ms per channel for precise measurement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput current:\u003c\/strong\u003e Max. 1200 mA from backplane bus at 5 V DC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower loss:\u003c\/strong\u003e Typically 4.6 W during normal operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation:\u003c\/strong\u003e Tested with 1500 V DC for safe industrial use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eVoltage and Current Input Ranges\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage ranges:\u003c\/strong\u003e ±20 mV, ±50 mV, ±80 mV, ±100 mV, ±250 mV, ±500 mV.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional voltage ranges:\u003c\/strong\u003e ±1 V, ±2.5 V, ±5 V, ±10 V, and 1–5 V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput resistance:\u003c\/strong\u003e Over 2000 ohms for 1–5 V range; 50 ohms for 4–20 mA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent ranges:\u003c\/strong\u003e 0–20 mA, ±3.2 mA, ±5 mA, ±10 mA, ±20 mA, and 4–20 mA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePermissible input voltage:\u003c\/strong\u003e Max. 35 V continuous; 75 V for up to 1 s.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePermissible input current:\u003c\/strong\u003e Max. 32 mA for current inputs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eThermocouple Support and Temperature Compensation\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermocouple types:\u003c\/strong\u003e B, E, J, K, L, N, R, S, T, and U.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput resistance:\u003c\/strong\u003e Over 2000 ohms for Type B and Type N thermocouples.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal compensation:\u003c\/strong\u003e Yes — built-in cold junction compensation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal compensation:\u003c\/strong\u003e Yes — with compensation socket 6ES7431-7KF00-6AA0.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic reference temperature:\u003c\/strong\u003e Yes — supports changing reference values.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLinearization:\u003c\/strong\u003e Parameterizable for all supported thermocouple types.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eAccuracy, Diagnostics, and Alarms\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperational error:\u003c\/strong\u003e ±0.3 % for voltage; ±0.5 % for current over full temperature range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBasic error at 25 °C:\u003c\/strong\u003e ±0.1 % for voltage; ±0.17 % for current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagnostics function:\u003c\/strong\u003e Yes — fully parameterizable for system monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagnostic alarm:\u003c\/strong\u003e Yes — triggers when faults occur.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLimit value alarm:\u003c\/strong\u003e Yes — alerts when signals exceed set thresholds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware interrupt:\u003c\/strong\u003e Yes — parameterizable for fast event response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterference suppression:\u003c\/strong\u003e Selectable for 400 Hz, 60 Hz, 50 Hz, or 10 Hz.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eIsolation, Installation, and Physical Data\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel isolation:\u003c\/strong\u003e Yes — each channel is isolated from the others.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane isolation:\u003c\/strong\u003e Yes — channels are isolated from the backplane bus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielded cable length:\u003c\/strong\u003e Max. 200 m for reliable signal transmission.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 25 mm wide, 290 mm high, and 210 mm deep.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approximately 650 g — easy to handle during installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegration time:\u003c\/strong\u003e Parameterizable with 2.5 ms, 16.7 ms, 20 ms, or 100 ms options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBasic conversion time:\u003c\/strong\u003e 10 ms, 16.7 ms, 20 ms, or 100 ms per channel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eInstallation Guide\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the module in a Siemens S7-400 rack with proper backplane connection.\u003c\/li\u003e\n\u003cli\u003eUse shielded twisted-pair cables for all analog signal connections.\u003c\/li\u003e\n\u003cli\u003eConnect thermocouple compensation socket 6ES7431-7KF00-6AA0 for external cold junction.\u003c\/li\u003e\n\u003cli\u003eKeep cable length under 200 m to maintain measurement accuracy.\u003c\/li\u003e\n\u003cli\u003eConfigure input ranges, diagnostics, and alarms in STEP 7 software.\u003c\/li\u003e\n\u003cli\u003eVerify wiring polarity before power-up to protect the module.\u003c\/li\u003e\n\u003cli\u003eAllow warm-up to 25 °C for best accuracy and lowest error.\u003c\/li\u003e\n\u003cli\u003eDo not exceed 35 V continuous input voltage to avoid damage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 × Siemens \u003cstrong\u003e6ES7431-7KF00-0AB0\u003c\/strong\u003e analog input module SM 431.\u003c\/li\u003e\n\u003cli\u003e1 × Quick reference guide for wiring and configuration.\u003c\/li\u003e\n\u003cli\u003e1 × Protective shipping carton with anti-static foam.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eShipping and Support\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWe ship via FedEx, UPS, and DHL — select your courier at checkout.\u003c\/li\u003e\n\u003cli\u003eOur stock is ready for immediate dispatch within 5 days after payment.\u003c\/li\u003e\n\u003cli\u003eWe accept returns within 30 days for unused items in original packaging.\u003c\/li\u003e\n\u003cli\u003eContact us for bulk orders or technical questions about this Siemens module.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the resolution of the 6ES7431-7KF00-0AB0?\u003c\/strong\u003e\u003cbr\u003eA: It provides 16-bit resolution with overrange, including the sign bit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Which thermocouple types does this module support?\u003c\/strong\u003e\u003cbr\u003eA: It supports Type B, E, J, K, L, N, R, S, T, and U thermocouples.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Does this module have channel isolation?\u003c\/strong\u003e\u003cbr\u003eA: Yes, each channel is isolated from the others and from the backplane bus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the conversion time for this module?\u003c\/strong\u003e\u003cbr\u003eA: The basic conversion time is 20 ms per channel, with parameterizable options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Can I use this module for resistance measurement?\u003c\/strong\u003e\u003cbr\u003eA: No, it does not support resistance or resistance thermometer measurement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the maximum shielded cable length?\u003c\/strong\u003e\u003cbr\u003eA: You can use shielded cables up to 200 meters long without signal degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Does this module support external cold junction compensation?\u003c\/strong\u003e\u003cbr\u003eA: Yes, it works with compensation socket 6ES7431-7KF00-6AA0 for external compensation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the power loss of this module?\u003c\/strong\u003e\u003cbr\u003eA: The typical power loss is 4.6 W during normal operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What diagnostics functions does this module offer?\u003c\/strong\u003e\u003cbr\u003eA: It provides parameterizable diagnostics, diagnostic alarms, limit value alarms, and hardware interrupts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: How do I suppress interference at 50 Hz or 60 Hz?\u003c\/strong\u003e\u003cbr\u003eA: You can parameterize the interference suppression frequency in STEP 7 software.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eContact Information\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInquiries: \u003ca href=\"mailto:sales@nex-auto.com\"\u003esales@nex-auto.com\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003ePhone\/WhatsApp: \u003ca href=\"https:\/\/wa.me\/8615392429628\"\u003e+86 153 9242 9628\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003ePartner: \u003ca href=\"https:\/\/www.nex-auto.com\/\"\u003eNexAuto Technology Limited\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":47363344072865,"sku":"6ES7431-7KF00-0AB0","price":246.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0673\/5390\/3265\/files\/6ES7431-7KF00-0AB0.jpg?v=1789367792","url":"https:\/\/www.autonexcontrol.com\/products\/6es7431-7kf00-0ab0-siemens-s7-400-analog-input-module","provider":"AutoNex Controls Limited ","version":"1.0","type":"link"}