{"product_id":"afs20d-yokogawa-centum-vp-duplexed-field-control-unit","title":"AFS20D | Yokogawa CENTUM VP Duplexed Field Control Unit","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAFS20D\u003c\/strong\u003e is a \u003cstrong\u003eduplexed field control unit (FCU)\u003c\/strong\u003e for the \u003cstrong\u003eYokogawa CENTUM VP and CENTUM CS 3000 distributed control systems\u003c\/strong\u003e. It executes continuous and sequence control strategies with \u003cstrong\u003edual-redundant processors, power modules, and communication buses\u003c\/strong\u003e to maintain uninterrupted process control under hardware fault conditions. The unit features a \u003cstrong\u003eVR5432 RISC processor at 133 MHz\u003c\/strong\u003e with \u003cstrong\u003e16 MB of battery-backed main memory\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Yokogawa CENTUM VP \/ CENTUM CS 3000\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Duplexed Field Control Unit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProcessor:\u003c\/strong\u003e VR5432 RISC CPU, 133 MHz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMain Memory:\u003c\/strong\u003e 16 MB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMemory Backup:\u003c\/strong\u003e Battery-backed, max. 72 hours retention\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Recharge Time:\u003c\/strong\u003e Minimum 48 hours\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Consumption:\u003c\/strong\u003e\n    \u003cul\u003e\n      \u003cli\u003e100–120 V AC: 1700 VA\u003c\/li\u003e\n      \u003cli\u003e220–240 V AC: 2000 VA\u003c\/li\u003e\n      \u003cli\u003e24 V DC: 50 A\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNetwork:\u003c\/strong\u003e Dual-redundant V net, dual-redundant RIO bus\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFCU Status Contact:\u003c\/strong\u003e 3 terminals (NC, NO, C), 250 V AC \/ 30 V DC, max. 2 A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Integrated cabinet, standard rack installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approx. 250 kg (base cabinet), 400 kg (fully loaded)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e 0°C to +55°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Terminals:\u003c\/strong\u003e M6 \/ Grounding: M8 \/ Contact Terminals: M4\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-Redundant Everything:\u003c\/strong\u003e Redundant CPU, power supply, V net, and RIO bus ensure no single point of failure can interrupt process control.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Power Capacity:\u003c\/strong\u003e Supports up to 1700 VA (AC) or 50 A (DC) to drive extensive I\/O configurations and node units.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e72-Hour Memory Retention:\u003c\/strong\u003e Battery-backed RAM preserves the entire control strategy and process state during extended outages.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Cabinet:\u003c\/strong\u003e Robust cabinet design supports up to 400 kg fully loaded, accommodating numerous I\/O modules and power supplies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStatus Contact Output:\u003c\/strong\u003e Form-C relay contact provides external alarm indication for FCU failure or switchover events.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between AFS20D and AFG20D?\u003c\/strong\u003e\u003cbr\u003eA: The \u003cstrong\u003eAFS20D\u003c\/strong\u003e is a \u003cstrong\u003estandard\u003c\/strong\u003e duplexed FCU with \u003cstrong\u003e16 MB\u003c\/strong\u003e memory. The \u003cstrong\u003eAFG20D\u003c\/strong\u003e is an \u003cstrong\u003eenhanced\u003c\/strong\u003e duplexed FCU with \u003cstrong\u003e32 MB\u003c\/strong\u003e memory for larger control strategies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How many I\/O points can the AFS20D support?\u003c\/strong\u003e\u003cbr\u003eA\u0026gt; The AFS20D supports extensive I\/O through the RIO bus. Exact point count depends on the number and type of remote I\/O racks and modules installed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What power supply should I specify?\u003c\/strong\u003e\u003cbr\u003eA\u0026gt; Select the suffix code matching your plant standard: \u003cstrong\u003e-11\u003c\/strong\u003e for 100–120 V AC, \u003cstrong\u003e-12\u003c\/strong\u003e for 220–240 V AC, or \u003cstrong\u003e-14\u003c\/strong\u003e for 24 V DC.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eInstall the cabinet on a \u003cstrong\u003ereinforced concrete floor\u003c\/strong\u003e capable of supporting 400 kg.\u003c\/li\u003e\n  \u003cli\u003eConnect \u003cstrong\u003eredundant AC or DC power\u003c\/strong\u003e to the M6 power terminals.\u003c\/li\u003e\n  \u003cli\u003eConnect the \u003cstrong\u003eM8 grounding terminal\u003c\/strong\u003e to the plant earth bus.\u003c\/li\u003e\n  \u003cli\u003eConnect \u003cstrong\u003eV net cables\u003c\/strong\u003e to both primary and redundant control network segments.\u003c\/li\u003e\n  \u003cli\u003eConnect \u003cstrong\u003eRIO bus cables\u003c\/strong\u003e to remote I\/O racks.\u003c\/li\u003e\n  \u003cli\u003eWire the \u003cstrong\u003eFCU status contact (M4 terminals)\u003c\/strong\u003e to an external alarm or indicator circuit.\u003c\/li\u003e\n  \u003cli\u003eVerify redundant failover by de-energizing the primary CPU or power supply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSelection Tips\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailability Requirements:\u003c\/strong\u003e The AFS20D is specified for processes where controller failure is unacceptable. For standard availability, consider the AFS20S single FCU.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCabinet Loading:\u003c\/strong\u003e Plan I\/O module count to stay within the 400 kg fully loaded limit. Distribute heavy power supplies evenly within the cabinet.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Maintenance:\u003c\/strong\u003e Include battery replacement in your 3-year preventive maintenance schedule to ensure 72-hour backup capability.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":53984833863864,"sku":"AFS20D","price":211.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/AFS20Dr180_adaa416c-fdcb-4038-8a38-3804c305b1f8.png?v=1787726958","url":"https:\/\/www.globalpetroparts.com\/products\/afs20d-yokogawa-centum-vp-duplexed-field-control-unit","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}