{"product_id":"analog-input-expansion-module-em-231-rtd-siemens-6es7231-7pb22-0xa8-for-s7-200-cn","title":"Analog Input Expansion Module EM 231 RTD - Siemens 6ES7231-7PB22-0XA8 for S7-200 CN","description":"\u003ch3 class=\"\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"\"\u003eThe Siemens 6ES7231-7PB22-0XA8 is a specialized RTD (Resistance Temperature Detector) expansion module designed specifically for the SIMATIC S7-200 CN series.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eThis 2-channel analog input component enables S7-22X CPUs to interface directly with high-precision temperature sensors without the need for external signal transducers.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eBy utilizing a 15-bit plus sign resolution,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ethe module provides exceptionally granular data,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003emaking it a cornerstone for thermal process regulation.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eIts architecture is optimized for the S7-200 CN ecosystem,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eensuring seamless hardware handshaking and rapid data integration for localized control tasks.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 class=\"\"\u003eCore Technical Parameters and Hardware Profile\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"\"\u003eThis expansion unit is engineered for precision and thermal stability.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eThe following specifications detail its physical and operational capabilities:\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eProperty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTechnical Specification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOrder Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6ES7231-7PB22-0XA8\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Quantity\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 Analog Inputs (RTD \/ Resistance)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eData Resolution\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e15 Bits + Sign\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMeasurement Accuracy\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.1°C or 0.1°F increments\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMass \/ Weight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.95 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModule Dimensions\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.5 cm x 83.8 cm x 5.1 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eApproximately 1.8W (Typical)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSensor Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePt100 to Pt10000, Ni100 to Ni120, Cu10, and Resistance (up to 600Ω)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan class=\"\"\u003eThe module features integrated diagnostic capabilities to detect wire breaks or out-of-range values,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eensuring the safety of the wider control loop.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eIt is housed in a compact enclosure that supports standard DIN rail mounting,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003efacilitating high-density installations in tight control cabinets.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 class=\"\"\u003eField Deployment and Industrial Use Cases\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"\"\u003eThe EM 231 RTD module is predominantly deployed in environments where precise thermal monitoring is non-negotiable.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eCommon applications include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong class=\"\"\u003eClimate and HVAC Control:\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eMonitoring ambient and duct temperatures in large-scale industrial ventilation systems to maintain strict environmental parameters.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong class=\"\"\u003ePlastic Processing:\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eRegulating heating zones in extrusion and injection molding machinery where slight temperature variances can compromise material integrity.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong class=\"\"\u003eCold Chain Logistics:\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eProviding high-accuracy logging for industrial refrigeration and pharmaceutical storage units.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong class=\"\"\u003eFood Processing:\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eSupervising pasteurization or cooking temperatures in batch processing,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ewhere 0.\u003c\/span\u003e\u003cspan class=\"\"\u003e1°C resolution is required for regulatory compliance.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":45519025963181,"sku":"6ES7231-7PB22-0XA8","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/siemens-6es7231-7pb22-0xa8-analog-input-module-vp3uba5m5nd.jpg?v=1766985045","url":"https:\/\/www.maxwellplc.com\/products\/analog-input-expansion-module-em-231-rtd-siemens-6es7231-7pb22-0xa8-for-s7-200-cn","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}