{"product_id":"yokogawa-aam21-s2-analog-input-module-1","title":"Yokogawa AAM21-S2 Analog Input Module","description":"\u003cp\u003eConfigured for low-level thermal and millivolt signal conditioning in Yokogawa DCS architectures such as CENTUM VP and CS 3000, the \u003cstrong\u003eYokogawa AAM21-S2\u003c\/strong\u003e (\u003cstrong\u003eAAM21-S2\u003c\/strong\u003e Thermocouple, mV, and RTD Input Module) provides direct physical\/electrical execution. It handles thermocouple (TC), resistance temperature detector (RTD), and millivolt (mV) field signals, transmitting digital temperature data to the Field Control Station (FCS).\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eAAM21-S2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eStandard Industrial Manufacturing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e3.2 cm x 10.7 cm x 13 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-10 deg C to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePowered via DCS Backplane Bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eThermocouple (TC), mV, and RTD Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003eHART Protocol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eCold Junction Compensation and Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe module incorporates high-accuracy cold junction compensation (CJC) algorithms to eliminate thermal measurement drift caused by gradient changes at field wiring terminal blocks. Individual channels feature galvanic isolation to protect low-level mV signals from electromagnetic interference and common-mode voltage spikes. Integrated HART communication permits simultaneous retrieval of process variables and digital field diagnostics from smart temperature transmitters.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the AAM21-S2 support simultaneous connection of different sensor types across its input channels?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the card operates as a universal analog input module capable of accepting low-level signals from thermocouples, RTDs, and direct mV sources based on channel software configuration.\u003c\/p\u003e\n\u003cp\u003eQ: How does internal Cold Junction Compensation (CJC) function on TC inputs?\u003c\/p\u003e\n\u003cp\u003eA: Internal thermistors on the terminal base measure the ambient reference junction temperature, enabling real-time voltage offset subtraction before digital conversion.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSlide the module into the designated slot on the CENTUM system baseplate until the latching mechanism clicks firmly into place.\u003c\/li\u003e\n\u003cli\u003eWire thermocouples and RTDs using extension leads and shielded cabling, landing the shield wire on the designated enclosure earth terminal to prevent signal noise.\u003c\/li\u003e\n\u003cli\u003eMaintain a minimum clearance of 50 mm around marshalling cabinets to ensure proper convective cooling and prevent thermal drift across CJC sensors.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":52842889150744,"sku":"AAM21-S2","price":170.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/screenshot_2026-10-10_09-53-19.png?v=1791597257","url":"https:\/\/www.innoplcsync.com\/products\/yokogawa-aam21-s2-analog-input-module-1","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}