{"product_id":"siemens-6es7231-5pf32-0xb0-sm-1231-rtd-8ai","title":"Siemens 6ES7231-5PF32-0XB0 SIMATIC S7-1200 SM 1231 8xAI RTD 16-Bit Analog Input Module","description":"\u003cp\u003eThe Siemens 6ES7231-5PF32-0XB0 SIMATIC S7-1200 SM 1231 RTD module provides 8 resistance-thermometer inputs supporting Pt100, Pt1000, Ni100, Ni1000, and Cu10 sensor types at up to 15-bit resolution plus sign. It runs on 24 V DC, draws 40 mA typical, and adds 80 mA on the backplane bus, dissipating 1.5 W.\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\u003e6ES7231-5PF32-0XB0\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 S7-1200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type Designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSM 1231, AI 8x16 bit RTD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent Consumption, typ.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40 mA (+80 mA backplane bus)\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\u003e1.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAnalog Inputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8, resistance thermometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRTD Types Supported\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePt10-1000, Ni100-1000, Cu10\/50\/100, LG-Ni1000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResistance Ranges\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150, 300, 600 Ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution, max.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15 bit + sign\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Error\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e+\/-0.1% at 25 C, +\/-0.2% at 55 C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRepeat Accuracy (25 C)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e+\/-0.05%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommon Mode Interference, min.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFront connector required (ordered separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIP Degree of Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmbient Temperature, vertical install\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-20 to 50 C\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\u003e70 x 100 x 75 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e220 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eCertifications \u0026amp; Standards\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCE\u003c\/li\u003e\n\u003cli\u003eCSA\u003c\/li\u003e\n\u003cli\u003eUL\u003c\/li\u003e\n\u003cli\u003ecULus\u003c\/li\u003e\n\u003cli\u003eFM\u003c\/li\u003e\n\u003cli\u003eRCM\u003c\/li\u003e\n\u003cli\u003eKC\u003c\/li\u003e\n\u003cli\u003eMarine\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSelection Notes\u003c\/h2\u003e\u003cp\u003eThis SM 1231 module reads resistance-based sensors only, across Pt100, Pt1000, Ni100, Ni1000, and Cu10 RTD types plus 150\/300\/600 Ohm resistance ranges; a thermocouple version of the SM 1231 family exists separately for mV-level inputs and is not interchangeable with this RTD variant. All 8 channels need a front connector ordered separately, and the 70 x 100 x 75 mm housing is a full S7-1200 expansion module rather than a CPU-mounted signal board, so it takes an expansion slot. The temperature error of plus\/minus 0.1% at 25 C, widening to plus\/minus 0.2% at 55 C, is worth checking against the accuracy target before specifying it on a calibration-critical loop.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eFits process temperature monitoring on S7-1200 systems: motor winding RTDs, bearing temperature, and HVAC or oven zone control where several Pt100 or Ni1000 sensors feed into one module.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":53960781988123,"sku":"6ES7231-5PF32-0XB0","price":702.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/7722\/4475\/files\/siemens-6es7231-5pf32-0xb0-sm1231-rtd-analog-input-module.png?v=1789663880","url":"https:\/\/stoklink.com\/products\/siemens-6es7231-5pf32-0xb0-sm-1231-rtd-8ai","provider":"Stoklink","version":"1.0","type":"link"}