{"product_id":"yokogawa-afs30d-h4121-duplexed-field-control-unit","title":"Yokogawa AFS30D-H4121 Duplexed Field Control Unit","description":"\u003cp\u003eThe Yokogawa AFS30D-H4121 is a Duplexed Field Control Unit (FCU) designed for Yokogawa CENTUM control systems. It belongs to the AFS30D family of field control units, which use a redundant controller architecture to execute process control functions. The AFS30D hardware is designed for FIO and 19-inch rack-mounted configurations.\u003c\/p\u003e\n\u003ch3\u003eProduct Function and System Role\u003c\/h3\u003e\n\u003cp\u003eThe FCU executes configured process control functions within a Field Control Station (FCS). It serves as the controller-level hardware between the control system's engineering configuration and its field I\/O infrastructure. Its duplex architecture provides two control paths for controller redundancy.\u003c\/p\u003e\n\u003cp\u003eThe AFS30D family is specified for FIO-based configurations and 19-inch rack mounting. The rack-mounted arrangement places the field control hardware within the system cabinet rather than in a standalone field enclosure.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure\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\u003eModel\u003c\/td\u003e\n\u003ctd\u003eAFS30D-H4121\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eDuplexed Field Control Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003eAFS30D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Function\u003c\/td\u003e\n\u003ctd\u003eField Control Station (FCS) controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Architecture\u003c\/td\u003e\n\u003ctd\u003eDuplexed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the difference between an FCU and an I\/O module?\u003c\/p\u003e\n\u003cp\u003eA: The FCU executes configured control functions and coordinates the control station. I\/O modules provide the interfaces for acquiring field signals and issuing output signals. They perform different roles within the FCS architecture.\u003c\/p\u003e\n\u003cp\u003eQ: Does the AFS30D-H4121 include a Sequence of Events (SOE) interface?\u003c\/p\u003e\n\u003cp\u003eA: This cannot be confirmed from the available model-specific information. Yokogawa documentation identifies the AFS30D-HE configuration as a duplexed FCU with an SOE interface. The H4121 ordering code should not automatically be treated as equivalent to that configuration.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":69266151244018,"sku":"AFS30D-H4121","price":235.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0730\/5589\/5794\/files\/AFS30D-H41212.jpg?v=1794281434","url":"https:\/\/www.petrospare.com\/products\/yokogawa-afs30d-h4121-duplexed-field-control-unit","provider":"Petro Spare Industrial Limited","version":"1.0","type":"link"}