{"product_id":"yokogawa-amm21-combination-digital-i-o-module","title":"Yokogawa AMM21 Combination Digital I\/O Module","description":"\u003ch2\u003eYokogawa AMM21 Combination Digital I\/O Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for discrete signal acquisition and output switching in CENTUM CS and CENTUM CS 3000 Remote I\/O (RIO) subsystems, the \u003cstrong\u003eYokogawa AMM21\u003c\/strong\u003e (\u003cstrong\u003eAMM21\u003c\/strong\u003e Combination Digital I\/O Module) provides direct physical\/electrical execution of 16-channel input monitoring and 16-channel transistor output control within a single slide-in rack module architecture.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eAMM21 is referenced as a base module identifier within Yokogawa RIO digital I\/O families. Common style variants (e.g., Style S2, Style S3) indicate mechanical and backplane compatibility revisions. No functional channel reconfiguration is defined at base model level; I\/O density remains fixed at 16 DI + 16 DO.\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 AMM21\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\u003e0.4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e12.7 x 2.5 x 20.3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperatingTemp\u003c\/td\u003e\n\u003ctd\u003eNot explicitly specified (typical RIO cabinet ambient industrial rating applies)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePowerConsumption\u003c\/td\u003e\n\u003ctd\u003eApprox. 3 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e16 x Digital Input (dry contact \/ open collector)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e16 x Digital Output (transistor sink type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Load\u003c\/td\u003e\n\u003ctd\u003e24 VDC \/ 30 VDC nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current\u003c\/td\u003e\n\u003ctd\u003e50 mA to 100 mA per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eOptical isolation, up to 1500 VAC withstand (1 min)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eChannel-to-Channel Isolation and CENTUM RIO Signal Structuring\u003c\/h3\u003e\n\u003cp\u003eWithin the Yokogawa CENTUM CS\/CS 3000 RIO architecture, the AMM21 implements optocoupler-based galvanic separation between field inputs and system backplane logic. The digital input stage conditions dry contact transitions while suppressing induced noise on long field wiring. Output transistor stages operate as current-sink drivers intended for relay interposing, lamp indicators, and low-energy solenoid interfaces. Signal segmentation is handled at module level, limiting cross-channel electrical coupling under standard cabinet grounding practice.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can AMM21 outputs drive direct actuator loads?\u003c\/strong\u003e\u003cbr\u003eA: No. Output channels are transistor sinks rated for low-current loads only. External interposing relays are required for inductive or high-power loads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the module support hot-swapping in RIO racks?\u003c\/strong\u003e\u003cbr\u003eA: Hot-swap capability depends on the specific CENTUM RIO base unit configuration. Electrical design assumes system power isolation prior to module replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are input channels internally isolated per point?\u003c\/strong\u003e\u003cbr\u003eA: Inputs are grouped with optocoupler isolation from system logic, but per-channel isolation details are not independently segmented at field level.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eEnsure RIO rack power is fully isolated before insertion or removal of the AMM21 module. Maintain proper shielding and single-point grounding for field cable shields at the cabinet entry. Avoid routing input and output wiring in the same high-current conduit to minimize induced coupling. Verify correct seating of the multi-pin backplane connector before energizing the system. For transistor outputs, include flyback suppression across inductive loads when applicable.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":44165745639512,"sku":"AMM21","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/AMM21-2.jpg?v=1780369960","url":"https:\/\/www.industriaxplc.com\/id\/products\/yokogawa-amm21-combination-digital-i-o-module","provider":"IndustriaX Limited","version":"1.0","type":"link"}