{"product_id":"yokogawa-amm32t-rtd-input-multiplexer-module","title":"Yokogawa AMM32T RTD Input Multiplexer Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa AMM32T\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eAMM32T\u003c\/strong\u003e RTD Input Multiplexer Module, operates as a dedicated hardware component for temperature data acquisition within CENTUM Distributed Control System platforms. This specialized module is engineered to process 3-wire Resistance Temperature Detector (RTD) input signals, supporting standard sensor calibrations such as JIS JPt100, JIS Pt100, and DIN Pt100 while transforming measured physical resistance variations into linearized internal variables.\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\u003eAMM32T\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 nested module weight profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard I\/O module nest form factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eStandard industrial operating limits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eRTD Input Multiplexer Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eCENTUM Distributed Control System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Configuration\u003c\/td\u003e\n\u003ctd\u003e3-wire type RTD interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Calibrations\u003c\/td\u003e\n\u003ctd\u003eJIS JPt100, JIS Pt100, DIN Pt100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfigurable Input Ranges\u003c\/td\u003e\n\u003ctd\u003e-200 to 600 deg C (Supports low-level raw inputs: -10 to 10 V DC, -100 to 100 mV DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-0.15 Ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasuring Excitation Current\u003c\/td\u003e\n\u003ctd\u003e1 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAllowable Wiring Resistance\u003c\/td\u003e\n\u003ctd\u003e150 Ohm maximum (per individual conductor wire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisconnection Detection Time\u003c\/td\u003e\n\u003ctd\u003e20 s Maximum (Sensor break validation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eInstalled directly into the I\/O module nest assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eLead Wire Resistance Compensation and Signal Isolation\u003c\/h3\u003e\n\u003cp\u003eThe AMM32T architecture is tailored for 3-wire RTD sensors, using an internal bridge balancing circuit to continuously eliminate lead wire resistance up to a maximum limit of 150 Ohm per wire. The module drives a constant 1 mA excitation current through the sensing element, measuring the resulting differential voltage drop to achieve an accuracy tolerance of $\\pm0.15\\ \\Omega$. Integrated tracking logic isolates the measurement loops from system-level logic buses, and an automated diagnostic routine continuously scans the connected channels, executing sensor disconnection detection within a maximum window of 20 seconds to flag open-circuit failures.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the 3-wire measurement design on the AMM32T eliminate errors caused by long distance field wiring?\u003c\/p\u003e\n\u003cp\u003eA: The 3-wire configuration assumes that all three copper conductors have identical resistance parameters. The module measures the resistance of the return lead wire and mathematically subtracts this value from the active sensor loop measurement. This real-time cancellation handles up to 150 Ohm of line impedance per wire without introducing measurement drift.\u003c\/p\u003e\n\u003cp\u003eQ: Can the AMM32T accept standard voltage signals, or is it restricted purely to RTD sensor elements?\u003c\/p\u003e\n\u003cp\u003eA: While optimized for temperature measurement across a -200 to 600 deg C spectrum, the underlying hardware channels are software-configurable to accept low-level raw signals, including -10 to 10 V DC and -100 to 100 mV DC scales, depending on the software configuration downloaded from the DCS station.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Calibration Selection\u003c\/strong\u003e: Match the software configuration settings in the CENTUM engineering builder with the physical field element type (JIS JPt100, JIS Pt100, or DIN Pt100) to avoid curve translation errors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Impedance Matching\u003c\/strong\u003e: Ensure that all three conductors for each RTD circuit are pulled from the same cable reel, maintaining identical lengths and cross-sections to keep wire resistance perfectly balanced below the 150 Ohm limit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcitation Current Separation\u003c\/strong\u003e: Do not parallel-wire multiple RTD inputs together, as the module's active 1 mA measuring current will conflict with other loops, destabilizing the analog-to-digital conversion matrix.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Screw Verification\u003c\/strong\u003e: Inspect and tighten all terminal block connections firmly; loose screws add localized, unstable contact resistance that the module will misinterpret as a temperature increase or a disconnection fault.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":47589426299070,"sku":"AMM32T","price":1500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/AMM32_3.jpg?v=1780043911","url":"https:\/\/www.autooiltech.com\/products\/yokogawa-amm32t-rtd-input-multiplexer-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}