{"product_id":"yokogawa-amm22m-mv-input-multiplexer-module","title":"Yokogawa AMM22M mV Input Multiplexer Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa AMM22M\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eAMM22M\u003c\/strong\u003e mV Input Multiplexer Module, operates as a dedicated hardware component for low-level voltage data acquisition within CENTUM CS and CENTUM VP Distributed Control System networks. This module multiplexes millivolt-level analog signals derived from low-range field sensors, executing high-resolution analog-to-digital conversion directly on localized low-voltage loops prior to transmitting serialized telemetry data back to the host DCS processing cluster.\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\u003eAMM22M\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\u003eStandard AMM-series weight profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard compact AMM-series hardware footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C operating exposure limit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eConfiguration dependent via DCS rack specification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003emV Input Multiplexer Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eCENTUM CS \/ CENTUM VP DCS Platform\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003eMulti-channel millivolt (mV) inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Isolation\u003c\/td\u003e\n\u003ctd\u003eGalvanic isolation (Channel-to-Channel and Channel-to-Ground)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Configuration\u003c\/td\u003e\n\u003ctd\u003eStandard nested DCS baseplate slot insertion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostic Validation\u003c\/td\u003e\n\u003ctd\u003eInternal runtime loop and hardware register monitoring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eCold Junction Compensation (CJC) and Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe architectural configuration of the AMM22M is specifically engineered to handle microvolt and millivolt variances, incorporating advanced channel-to-channel isolation to prevent ground potential variations from distorting sensitive signal readings. When processing low-level thermal or millivolt field devices, the module utilizes high-precision cold junction compensation (CJC) equations within its A\/D hardware matrix to dynamically nullify local environmental ambient temperature drift at the terminal blocks. This multi-layered electrical shielding structure effectively suppresses high-frequency common-mode noise and cross-talk, keeping signal conversion clean and deterministic across the entire distributed control bus topology.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the AMM22M handle open-circuit or broken sensor conditions on its low-level mV input channels?\u003c\/p\u003e\n\u003cp\u003eA: The module's internal diagnostic processor continuously drives a microscopic burnout current through the input terminals. If a field wire breaks or a sensor element opens, the input loop voltage immediately saturates to its full positive or negative threshold, prompting the internal firmware to flag an out-of-bounds error register to the CENTUM VP control station.\u003c\/p\u003e\n\u003cp\u003eQ: Can the millivolt input loops on the AMM22M be intermixed directly with standard high-voltage 0-10 V lines?\u003c\/p\u003e\n\u003cp\u003eA: No. The AMM22M input circuitry is optimized exclusively for low-level millivolt (mV) ranges. Applying standard high-voltage 0-10 V or 24 VDC industrial signals directly to the mV terminal arrays will saturate the input conversion matrix and can result in permanent thermal degradation of the precision sensing components.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Signal Cable Shielding\u003c\/strong\u003e: Utilize high-density shielded twisted-pair (STP) extension cables for all mV field sensor runs, ensuring the shield drain wire is tied strictly to a clean instrument ground bar inside the control cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient Thermal Equilibrium\u003c\/strong\u003e: Avoid mounting the module directly adjacent to large internal heat-generating components like power transformers or heavy contactors to keep the cold junction compensation tracking point accurate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Block Mechanical Security\u003c\/strong\u003e: Ensure all terminal screws are torqued down evenly onto the wire conductors, as loose microvolt connections can introduce high contact resistance and cause significant measurement offset errors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Separation Rules\u003c\/strong\u003e: Segregate all low-level millivolt input conduits into dedicated cable trays completely separate from any high-current AC power or inductive motor drive wiring to minimize electromagnetic noise pickup.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":47589345657022,"sku":"AMM22M","price":1500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/AMM22T_1.png?v=1780036462","url":"https:\/\/www.autooiltech.com\/products\/yokogawa-amm22m-mv-input-multiplexer-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}