{"product_id":"amm42-s4-yokogawa-analog-input-module-multiplexer-input-module","title":"AMM42-s4 Yokogawa Analog Input Module | Multiplexer Input Module","description":"\u003ch2\u003eokogawa AMM42-s4 Multiplexer Input Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for analog signal multiplexing acquisition in Field Control Station (FCS) environments, the \u003cstrong\u003eYokogawa AMM42-s4\u003c\/strong\u003e (\u003cstrong\u003eAMM42-s4 Multiplexer Input Module\u003c\/strong\u003e) provides direct electrical routing and scanning of field transmitter inputs into the FCS data acquisition layer.\u003c\/p\u003e\n\u003cp\u003eThe module operates as a high-density input multiplexer for sequential channel sampling within Yokogawa I\/O architecture, supporting transmitter excitation via integrated loop power while maintaining a non-isolated electrical topology between system, field, and channels.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eNo formally published internal suffix decomposition is provided for AMM42-s4 beyond its complete ordering code designation. The identifier is treated as a single functional module reference within Yokogawa FCS I\/O catalog structure.\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModelBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa AMM42-s4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePowerConsumption\u003c\/td\u003e\n\u003ctd\u003eTransmitter supply 23.5 to 24.5 VDC, output current limit \u0026lt;= 60 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Resistance\u003c\/td\u003e\n\u003ctd\u003e250 ohm (modifiable to 70 ohm with barrier connection)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Isolation\u003c\/td\u003e\n\u003ctd\u003eNo isolation between system, field, and channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Role\u003c\/td\u003e\n\u003ctd\u003eMultiplexed analog input scanning module for FCS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eYokogawa Field I\/O Electrical Topology Characteristics\u003c\/h3\u003e\n\u003cp\u003eWithin the FCS I\/O framework of Yokogawa, the AMM42-s4 implements a multiplexed acquisition method where channel sequencing is performed internally rather than via parallel A\/D conversion per channel. The field wiring interface is electrically common across channels, and no galvanic isolation is implemented between field terminals and system backplane. This topology requires external consideration for grounding strategy, especially in mixed-signal environments where loop integrity and noise coupling must be controlled at cabinet level.\u003c\/p\u003e\n\u003cp\u003eLoop-powered transmitter support is provided through a regulated 23.5 to 24.5 VDC supply rail, with enforced current limitation to 60 mA, constraining aggregate field device loading per module segment.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the AMM42-s4 support channel-to-channel electrical isolation?\u003c\/strong\u003e\u003cbr\u003eA: No. The module architecture is non-isolated across channels, requiring external isolation if segregation is required at system level.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the module directly power 4-20 mA field transmitters?\u003c\/strong\u003e\u003cbr\u003eA: Yes, within the constraint of a 23.5 to 24.5 VDC loop supply and a maximum output current limit of 60 mA per supply path.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is hot-swap insertion supported during operation?\u003c\/strong\u003e\u003cbr\u003eA: Hot-swap behavior is dependent on FCS rack implementation; electrical loop continuity must be evaluated prior to module removal to avoid process interruption.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMaintain shield termination at a single-point ground within the control cabinet to reduce loop noise coupling on non-isolated channels.\u003c\/li\u003e\n\u003cli\u003eVerify total loop current demand does not exceed 60 mA per transmitter supply segment.\u003c\/li\u003e\n\u003cli\u003eUse appropriate barrier resistance configuration (250 ohm or 70 ohm) based on external intrinsic safety barrier requirements.\u003c\/li\u003e\n\u003cli\u003eEnsure consistent reference grounding between FCS backplane and field wiring marshalling panels to prevent floating potential differentials.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":44148172521560,"sku":"AMM42","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/AMM42.jpg?v=1779874382","url":"https:\/\/www.industriaxplc.com\/products\/amm42-s4-yokogawa-analog-input-module-multiplexer-input-module","provider":"IndustriaX Limited","version":"1.0","type":"link"}