{"product_id":"yokogawa-afg84d-h4123-field-control-unit","title":"Yokogawa AFG84D-H4123 Field Control Unit","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa AFG84D-H4123\u003c\/strong\u003e serves as the primary \u003cstrong\u003eAFG84D\u003c\/strong\u003e Duplexed Field Control Unit utilized to execute dual-processor synchronization and deterministic process control loops across Yokogawa CENTUM system platforms.\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\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\u003eAFG84D-H4123\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\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\u003e9.5 kg (Standard duplex chassis configuration)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 19-inch rack-mount footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e240 VA maximum operational load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Subsystem\u003c\/td\u003e\n\u003ctd\u003eOPC integration layer and pre-built protocol library\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy Model\u003c\/td\u003e\n\u003ctd\u003eDuplexed architecture (Processors, power, communication)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfiguration Interface\u003c\/td\u003e\n\u003ctd\u003eFile-based parameter mapping (Three-sheet spreadsheet matrix)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control and Distributed Control Architecture\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBumpless Standby Processor Synchronization\u003c\/strong\u003e The hardware architecture integrates two synchronized control processors running in a continuous parallel tracking mode. If the active processor encounters a diagnostic fault or memory parity error, execution transfers instantly to the hot-standby unit, ensuring a bumpless transfer that maintains uninterrupted process control and zero downtime for critical loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmbedded OPC Communication Integration\u003c\/strong\u003e The firmware layer incorporates a pre-built communication library that enables direct, two-way data exchange between the CENTUM control core and external supervisory systems. This embedded protocol engine establishes real-time monitoring and control links without requiring custom coding or separate external interface software gateways.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFile-Based Configuration Management\u003c\/strong\u003e System variables, memory tags, and network parameters are mapped and customized using a streamlined three-file configuration spreadsheet matrix. This file-based setup optimizes data ingestion rates into the non-volatile flash memory registers, ensuring predictable, deterministic cycle times across all configured I\/O points.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How is the file-based configuration matrix transferred to the AFG84D-H4123 hardware?\u003c\/p\u003e\n\u003cp\u003eA: The three configuration spreadsheets are validated and compiled within the CENTUM engineering workstation. The resulting binary parameter map is then downloaded directly to the active field control unit via the redundant system network, where the internal memory managers distribute the configuration across both synchronized processors.\u003c\/p\u003e\n\u003cp\u003eQ: Does the integrated OPC communication library impact the deterministic execution of critical control logic?\u003c\/p\u003e\n\u003cp\u003eA: No. The internal processor microkernel partitions communication processing from the primary control execution loop. The pre-built library manages OPC data exchange in a dedicated low-priority time slice, ensuring that high-speed deterministic control tasks and safety routines are executed within their fixed cycle boundaries.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":47618534047934,"sku":"AFG84D-H4123","price":3000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-06-10_11-38-36.png?v=1781070260","url":"https:\/\/www.autooiltech.com\/products\/yokogawa-afg84d-h4123-field-control-unit","provider":"AutoOilTech Limited","version":"1.0","type":"link"}