{"product_id":"yokogawa-afs20d-field-control-unit","title":"Yokogawa AFS20D Field Control Unit","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa AFS20D\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eAFS20D\u003c\/strong\u003e CPU Processor, operates as a dedicated hardware component for control logic execution, real-time data processing, and backplane bus routing within CENTUM VP distributed control networks.\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\u003eAFS20D\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\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eCENTUM VP \/ FIO Subsystem\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\u003eStandard rack-mounted FCU component mass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eMulti-slot industrial chassis-integrated footprint geometry\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC nominal internal bus input rating \/ 20 A maximum total backplane current capacity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Capacity\u003c\/td\u003e\n\u003ctd\u003e32 integrated physical FIO functional card slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration Resistance\u003c\/td\u003e\n\u003ctd\u003e10 to 500 Hz frequency sweep at 1.5 mm peak displacement amplitude\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShock Resistance\u003c\/td\u003e\n\u003ctd\u003e50 G peak acceleration limit for an 11 ms duration pulse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy Layout\u003c\/td\u003e\n\u003ctd\u003eDual-redundant internal processor and power bus configurations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eCPU Processors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control and DCS Instrumentation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-20 mA HART Loop Protocol Integration:\u003c\/strong\u003e The internal communications controller routes digitized field data from 4-20 mA HART loops directly to the control database. Processor modules demodulate digital diagnostics concurrently with the analog signal, preventing data skew during fast-acting execution cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Bus Bandwidth and Channel Isolation:\u003c\/strong\u003e The high-speed logic bus supports synchronous transfers across all 32 slot addresses. Galvanic and physical shielding layers isolate low-power CPU memory registers from high-voltage field-side surges, preventing backplane cross-talk under transient fault conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How is the dual-redundant processing managed in the event of a processor failure?\u003c\/p\u003e\n\u003cp\u003eA: The AFS20D relies on a hardware-level dual-redundant pairing of processor blocks. If the active processor encounters a fatal execution error, a bump-less switchover to the standby processor occurs within milliseconds, maintaining continuous communication across the FIO backplane.\u003c\/p\u003e\n\u003cp\u003eQ: What is the significance of the 20 A maximum total backplane current rating?\u003c\/p\u003e\n\u003cp\u003eA: The total current drawn by all 32 populated functional cards must not exceed 20 A. Exceeding this limit can cause thermal overload on the internal power bus traces and trigger automatic overcurrent protection shutdowns.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Grounding and Shield Termination:\u003c\/strong\u003e Bond the chassis safety ground terminal to the system ground bus bar using a low-impedance copper braid. Ensure that instrument shield wires are terminated at the dedicated cabinet ground plate and not daisy-chained, keeping resistance below 1.0 Ohm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental Temperature Maintenance:\u003c\/strong\u003e Since the unit is rated for -20 to +70 deg C, maintain adequate forced-air ventilation inside the cabinet enclosure when populated with high-density analog I\/O cards to avoid localized thermal hotspots.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration Dampening and Enclosure Mounting:\u003c\/strong\u003e Ensure the chassis is secured to the rack frame using all designated mounting holes. For installations subject to continuous vibration up to 500 Hz, install specialized elastomer isolation dampeners between the rack ears and the cabinet rails.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":45256567914611,"sku":"AFS20D","price":233.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-07-10_17-00-44_c8037aee-9517-4461-a72f-76cdd5e81043.png?v=1784259506","url":"https:\/\/www.dcssupplier.com\/ar\/products\/yokogawa-afs20d-field-control-unit","provider":"DcsSupplier Limited","version":"1.0","type":"link"}