{"product_id":"yokogawa-amm22t-thermocouple-input-multiplexer-module","title":"Yokogawa AMM22T Thermocouple Input Multiplexer Module","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa AMM22T\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eAMM22T\u003c\/strong\u003e Thermocouple Input Multiplexer Module, operates as a dedicated hardware component for multi-channel temperature sensor signal acquisition and conditioning within Yokogawa process control platforms. It processes low-millivolt inputs from J, K, T, E, R, S, B, and N thermocouple sensors and converts them into standardized analog current output loop signals.\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\u003eAMM22T\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\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;= 10 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Range\u003c\/td\u003e\n\u003ctd\u003e-200 deg C to +600 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Thermocouples\u003c\/td\u003e\n\u003ctd\u003eJ, K, T, E, R, S, B, N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;= 100 Mohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommon Mode Rejection Ratio\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;= 60 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Range\u003c\/td\u003e\n\u003ctd\u003e0-20 mA or 4-20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-0.25%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e0 to 95% RH (non-condensing)\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 Signal Conditioning\u003c\/h3\u003e\n\u003cp\u003eThe AMM22T incorporates internal cold junction compensation (CJC) circuitry alongside sensor linearization networks to correct for ambient temperature drifts across the terminal junction. Operating in conjunction with downstream analog input assemblies running 4-20 mA HART loop protocol communications, the multiplexer isolates input channels to suppress high common-mode voltages. Integrated signal conditioning and fault detection networks continually track thermocouple continuity, driving outputs to predefined fail-safe levels upon open-circuit detection.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the AMM22T maintain measurement accuracy during ambient temperature variations at the terminal blocks?\u003c\/p\u003e\n\u003cp\u003eA: Integrated cold junction compensation (CJC) circuitry continuously measures ambient reference point temperatures and offsets thermo-electric voltage drifts prior to A\/D conversion and output processing.\u003c\/p\u003e\n\u003cp\u003eQ: What action does the AMM22T take when an open-circuit fault occurs on a thermocouple input?\u003c\/p\u003e\n\u003cp\u003eA: The onboard fault detection and isolation logic identifies sensor burnout or wire breakage and forces the corresponding output channel into a configured out-of-range state.\u003c\/p\u003e\n\u003cp\u003eQ: Can the AMM22T be configured for both 0-20 mA and 4-20 mA current loops?\u003c\/p\u003e\n\u003cp\u003eA: Yes, output signal ranges can be selected between 0-20 mA and 4-20 mA with an overall output conversion accuracy of +\/-0.25%.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eESD Protection:\u003c\/strong\u003e Always wear a grounded anti-static wrist strap when contacting the terminal block assembly or internal module electronics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold Junction Sensor Integrity:\u003c\/strong\u003e Ensure the internal CJC temperature sensor on the terminal block remains unshielded from ambient air but protected from direct external thermal radiation or heat sources.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Grounding:\u003c\/strong\u003e Connect thermocouple extension cable shields to a single dedicated system ground bar at the cabinet entry point to maintain high common-mode noise rejection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Separation:\u003c\/strong\u003e Route low-millivolt thermocouple leads in separate grounded conduit raceways isolated from high-voltage power lines and inductive switching loads.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":53312690290997,"sku":"AMM22T","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/AMM22T.png?v=1786949226","url":"https:\/\/www.5gplc.com\/products\/yokogawa-amm22t-thermocouple-input-multiplexer-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}