{"product_id":"yokogawa-amm31t-s2-centum-cs-rio-rtd-input-multiplexer-module","title":"Yokogawa AMM31T-S2 Centum CS RIO RTD Input Multiplexer Module","description":"\u003ch2\u003eYokogawa AMM31T-S2 Centum VP RTD Input Multiplexer Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa AMM31T-S2\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eAMM31T\u003c\/strong\u003e RTD Input Multiplexer Module, operates as a dedicated hardware component for multi-channel temperature signal acquisition within Centum CS \/ Centum VP platforms. Configured as part of the RIO system architecture, the device routes multiple analog resistive circuits through a centralized analog-to-digital processing core, scanning field transmitters sequentially to populate the station variables.\u003c\/p\u003e\n\u003ch3\u003eLayout Configuration Selection: Layout 1\u003c\/h3\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\u003eAMM31T-S2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa Electric Corporation\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\u003e0.8 kg (1.72 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e12.7 cm x 10.2 cm x 22.9 cm (5.0 in x 4.0 in x 9.0 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC, 150 mA typical current draw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channel Count\u003c\/td\u003e\n\u003ctd\u003e8 channels (multiplexed scanning arrangement)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported RTD Wiring\u003c\/td\u003e\n\u003ctd\u003e2-wire, 3-wire, 4-wire configurations (e.g., Pt100)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Measurement Limits\u003c\/td\u003e\n\u003ctd\u003e-200 to +850 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/- 0.1% of full scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Sampling Rate\u003c\/td\u003e\n\u003ctd\u003e1 sample per second\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Interface\u003c\/td\u003e\n\u003ctd\u003eRS-485 communication protocol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Installation\u003c\/td\u003e\n\u003ctd\u003eDIN-rail mounting base compatibility\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Diagnostics\u003c\/td\u003e\n\u003ctd\u003eInternal self-test routines and loop alarm verification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control \u0026amp; DCS Instrumentation Technical Attributes\u003c\/h3\u003e\n\u003cp\u003eThis execution unit utilizes a solid-state multiplexing matrix to switch 8 RTD input channels into a single high-resolution sampling network. The physical layout incorporates internal loop connections that balance resistive values for 3-wire and 4-wire Pt100 sensors, eliminating lead-wire resistance variables before digitization. To maintain structural data security across the industrial serial backbone, the design utilizes an isolated RS-485 interface link that prevents field-side voltage spikes from bleeding into the primary DCS processing logic, while integrated channel-to-channel isolation circuits suppress common-mode electrical interference.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the sequential scanning architecture affect the time constant of the control loops?\u003c\/p\u003e\n\u003cp\u003eA: The module executes an active sampling cycle of 1 sample per second across the input array. Because channels undergo multiplexed processing, this hardware configuration must be restricted to slow-velocity thermal processes where immediate update changes under 100 ms are not demanded by the controller.\u003c\/p\u003e\n\u003cp\u003eQ: What mechanisms exist to identify sensor faults or wire breaks?\u003c\/p\u003e\n\u003cp\u003eA: The module integrates continuous diagnostic hardware monitoring routines. An open-circuit or broken lead wire on any connected RTD channel triggers a high-scale upscale burnout alarm bit within the internal diagnostic status word transmitted over the RS-485 link.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIN-Rail Panel Fitting:\u003c\/strong\u003e Snap the terminal enclosure firmly onto standard symmetric 35 mm DIN-rail systems, confirming the 12.7 cm x 10.2 cm x 22.9 cm clearance profiles match cabinet spacing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResistive Loop Termination:\u003c\/strong\u003e Terminate the 2-wire, 3-wire, or 4-wire field lines onto the designated terminal pin positions, preserving matched conductor lengths for identical resistance legs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Continuity Management:\u003c\/strong\u003e Ground all external RTD instrumentation cable shields exclusively at the central marshalling enclosure earth bar, keeping the sensor side isolated to prevent parasitic circulating currents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBus Serial Wiring:\u003c\/strong\u003e Daisy-chain the RS-485 serial communication pairs using twisted, shielded instrumentation cables, installing proper termination resistors at the physical end-of-line nodes.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43681072480346,"sku":"AMM31T","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/599.jpg?v=1784513064","url":"https:\/\/www.spareoil.com\/products\/yokogawa-amm31t-s2-centum-cs-rio-rtd-input-multiplexer-module","provider":"SpareOil Automation","version":"1.0","type":"link"}