{"product_id":"amn21-yokogawa-nest-for-relay-i-o-modules-new","title":"AMN21 | Yokogawa Nest for Relay I\/O Modules | New","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa AMN21\u003c\/strong\u003e is an \u003cstrong\u003eI\/O Module Nest for Relay I\/O Modules\u003c\/strong\u003e in the CENTUM CS\/VP RIO system. It provides mounting and connectivity for relay input and output modules such as ADM15R (relay input) and ADM55R (relay output). The AMN21 enables the DCS to interface with high-voltage or isolated field devices using electromechanical relay contacts, providing robust galvanic isolation for safety-critical applications.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e AMN21\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e I\/O Module Nest for Relay I\/O Modules\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Modules:\u003c\/strong\u003e ADM15R (Relay Input Module), ADM55R (Relay Output Module)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 5.0 VDC from node interface unit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Node Interface Unit or I\/O Expansion Rack\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEnvironmental Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e 0°C to +50°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelative Humidity:\u003c\/strong\u003e 5% to 95% RH (non-condensing)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e -20°C to +70°C\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eMount the AMN21 in the node interface unit or expansion rack.\u003c\/li\u003e\n  \u003cli\u003eInstall relay I\/O modules (ADM15R\/ADM55R) into the nest slots.\u003c\/li\u003e\n  \u003cli\u003eConnect field devices to the relay terminals, observing voltage and current ratings.\u003c\/li\u003e\n  \u003cli\u003eInstall suppression devices (diodes, RC snubbers) for inductive loads to protect relay contacts.\u003c\/li\u003e\n  \u003cli\u003eVerify relay operation and contact status via CENTUM VP diagnostic displays.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: What is the contact rating of ADM15R\/ADM55R?\u003c\/strong\u003e\u003cbr\u003eA: Relay contact ratings vary by module; consult ADM15R\/ADM55R specifications for voltage and current limits.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: Can relay modules be mixed with digital modules?\u003c\/strong\u003e\u003cbr\u003eA: No, AMN21 is specifically for relay modules; use AMN31\/AMN32 for digital transistor I\/O modules.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: Is relay status monitoring available?\u003c\/strong\u003e\u003cbr\u003eA: Yes, relay module status is monitored by the DCS and alarmed on fault conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: What is the relay response time?\u003c\/strong\u003e\u003cbr\u003eA: Electromechanical relay response is typically 5–15 ms; solid-state relays offer faster switching if required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSelection Tips\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUse AMN21 for applications requiring galvanic isolation or high-voltage switching beyond transistor I\/O capabilities.\u003c\/li\u003e\n  \u003cli\u003eSpecify ADM15R for isolated digital inputs and ADM55R for isolated digital outputs.\u003c\/li\u003e\n  \u003cli\u003eConsider solid-state relays for high-speed switching applications where electromechanical relay life is a concern.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":53768231682232,"sku":"AMN21","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/AMN21_1___r180.png?v=1784095724","url":"https:\/\/www.globalpetroparts.com\/products\/amn21-yokogawa-nest-for-relay-i-o-modules-new","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}