{"product_id":"yokogawa-afg84d-h4123-centum-vp-field-control-unit","title":"YOKOGAWA AFG84D-H4123 CENTUM VP Field Control Unit","description":"\u003ch2\u003eYOKOGAWA AFG84D-H4123 Field Control Unit\u003c\/h2\u003e\n\u003cp\u003eConfigured for high-availability process control in CENTUM VP and CS 3000 systems, the \u003cstrong\u003eYOKOGAWA AFG84D-H4123\u003c\/strong\u003e (\u003cstrong\u003eAFG84D\u003c\/strong\u003e Field Control Unit) provides direct physical and logical execution of control algorithms through dual-redundant processing pathways.\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\u003e0.8 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e482.6 mm x 310 mm x 265 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to 50 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e250 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy\u003c\/td\u003e\n\u003ctd\u003eDuplex (CPU, Power, Bus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFailover Time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 10 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;= 500 VDC channel-to-channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDCS Process Control and Connectivity\u003c\/h3\u003e\n\u003cp\u003eThe AFG84D-H4123 architecture utilizes a 4-20 mA HART loop protocol to facilitate bidirectional communication between field instrumentation and the Vnet\/IP control network. The module ensures deterministic loop execution by isolating field-side signals through 500 VDC channel-to-channel isolation barriers. When integrated into the control hierarchy, the unit manages synchronization between redundant CPU pairs, maintaining consistent scan cycles and I\/O image updates across the primary and standby processors.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the AFG84D-H4123 support live insertion and removal of power supply modules?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The power supply units are designed for hot-swapping under normal load conditions. The internal circuitry limits inrush current to 30 A for a duration of 50 ms to prevent voltage sag on the common backplane during installation.\u003c\/p\u003e\n\u003cp\u003eQ: How is the failover logic synchronized during a CPU fault?\u003c\/p\u003e\n\u003cp\u003eA: The system utilizes a dedicated high-speed bus to mirror memory states between the primary and standby CPUs. Upon detection of a processor hang or hardware fault, the secondary CPU assumes bus mastership within a failover window of less than 10 ms, ensuring the control process remains uninterrupted.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRack Mounting:\u003c\/strong\u003e Secure the unit within a standard 19-inch industrial rack using all four chassis mounting points. Ensure that internal cooling fans remain unobstructed to maintain the operational temperature range of 0 deg C to 50 deg C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielding:\u003c\/strong\u003e Terminate all analog signal cable shields to the cabinet ground bus bar at the entry point. Avoid routing high-voltage power cables in the same wireway as the Vnet\/IP communication bus to prevent electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding:\u003c\/strong\u003e Verify that the chassis frame establishes a low-resistance connection to the station earth ground. This prevents potential drift in the 4-20 mA measurement accuracy caused by ground loops or transient common-mode voltages.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43616360857690,"sku":"AFG84D-H4123","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/393._0494a64e-fd12-4f54-bc12-6735ae19a19c.jpg?v=1783476705","url":"https:\/\/www.spareoil.com\/ar\/products\/yokogawa-afg84d-h4123-centum-vp-field-control-unit","provider":"SpareOil Automation","version":"1.0","type":"link"}