{"product_id":"siemens-6es7431-7kf00-0ab0-sm-431-8ai-thermocouple-input","title":"Siemens 6ES7431-7KF00-0AB0 SIMATIC S7-400 SM 431 8AI 16-Bit U\/I\/Thermocouple Input Module","description":"\u003cp\u003eThe Siemens 6ES7431-7KF00-0AB0 is a SIMATIC S7-400 SM 431 analog input module with 8 isolated channels for voltage, current, and thermocouple measurement at up to 16-bit resolution. It supports ten thermocouple types with internal or external cold-junction compensation, and it reports diagnostic and limit-value alarms plus a hardware interrupt back to the CPU whenever a reading leaves its parameterized range.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6ES7431-7KF00-0AB0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSIMATIC S7-400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSM 431\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNumber of Analog Inputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution (max, incl. sign)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Input Ranges\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-100 mV to -20 mV up to -10 V to +10 V (10 ranges)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent Input Ranges\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 to 20 mA, 4 mA to 20 mA, -20 mA to +20 mA and others\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThermocouple Types Supported\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eB, E, J, K, L, N, R, S, T, U\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCold-Junction Compensation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInternal, or external via compensation socket 6ES7431-7KF00-6AA0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBasic Conversion Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 \/ 16.7 \/ 20 \/ 100 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiagnostics \/ Limit Value Alarm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes, parameterizable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHardware Interrupt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes, parameterizable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Current from Backplane Bus 5 V DC (max)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1200 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Loss (typ.)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.6 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIsolation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1500 V DC test voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCable Length (shielded, max)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions (W x H x D)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 x 290 x 210 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight (approx.)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e650 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eSelection Notes\u003c\/h2\u003e\u003cp\u003ePick this SM 431 variant over the resistance-input sibling in the same family when the loop needs thermocouple inputs or 16-bit resolution, since this module trades resistance-input ranges for ten thermocouple types and a finer 16-bit conversion. The parameterizable diagnostic alarm and hardware interrupt let a broken sensor wire or an out-of-range reading trigger a CPU interrupt instead of waiting for a cyclic scan, which matters for temperature loops where a stuck reading can mask a real fault.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eThe mixed voltage, current, and thermocouple ranges on 8 isolated channels suit furnace, oven, and process-temperature monitoring on an S7-400 backplane, where several sensor types share one rack slot. The 10\/16.7\/20\/100 ms conversion time is parameterizable per channel to trade speed for interference-frequency suppression at 50 Hz or 60 Hz.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":53960603468059,"sku":"6ES7431-7KF00-0AB0","price":4541.87,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/7722\/4475\/files\/siemens-6es7431-7kf00-0ab0-sm-431-8ai-thermocouple-input-module.png?v=1789797974","url":"https:\/\/stoklink.com\/products\/siemens-6es7431-7kf00-0ab0-sm-431-8ai-thermocouple-input","provider":"Stoklink","version":"1.0","type":"link"}