{"product_id":"yokogawa-afg20d-duplexed-field-control-unit","title":"Yokogawa AFG20D Duplexed Field Control Unit","description":"\u003cp\u003eConfigured for duplexed control processing and remote input\/output (RIO) routing in CENTUM VP platforms, the \u003cstrong\u003eYokogawa AFG20D\u003c\/strong\u003e (\u003cstrong\u003eAFG20D\u003c\/strong\u003e Duplexed Field Control Unit) provides direct physical\/electrical execution.\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\u003eAFG20D\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\u003eCabinet assembly dependent (Typical 250 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard cabinet configuration footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 50 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e450 VA (at 100-120 VAC) \/ 480 VA (at 220-240 VAC) \/ 10 A (at 24 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e100-120 VAC (50\/60 Hz), 220-240 VAC (50\/60 Hz), 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating Value\u003c\/td\u003e\n\u003ctd\u003e828 x 10^3 J\/h (230 W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Controller Memory\u003c\/td\u003e\n\u003ctd\u003e32 Mbyte enhanced main memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy Layout\u003c\/td\u003e\n\u003ctd\u003eFully duplexed processor modules and power supply lines\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 duplexed control architecture manages real-time process loops by executing synchronous scanning cycles that route 4-20 mA analog inputs and high-frequency HART digital diagnostic data directly into the 32 Mbyte memory map. This allows active instrument monitoring without processing latency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGalvanic and Channel-to-Channel Isolation:\u003c\/strong\u003e The internal communication backplane uses advanced dielectric isolation pathways to isolate individual I\/O channels. This channel-to-channel isolation protects the main processor unit from field-side loop surges and potential ground loop interference across the remote I\/O layout.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the main advantage of the AFG20D over standard field control units?\u003c\/p\u003e\n\u003cp\u003eA: The AFG20D features an enhanced processor module containing 32 Mbyte of main memory (double the capacity of standard 16 Mbyte models), allowing it to handle larger RIO databases, more complex control logic loops, and more extensive system communication tables.\u003c\/p\u003e\n\u003cp\u003eQ: How is memory protected on the AFG20D during a total power failure?\u003c\/p\u003e\n\u003cp\u003eA: The AFG20D relies on an integrated battery backup system to preserve volatile RAM data. Upon power loss, the backup system maintains memory contents for up to 72 hours, requiring at least 48 hours of live operational recharging to reach full capacity.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabinet Earthing and Noise Abatement:\u003c\/strong\u003e Connect the cabinet's integrated copper grounding plate directly to the plant instrument ground bus. Ensure a solid, low-resistance connection (less than 1.0 Ohm) to protect the sensitive internal backplanes and guarantee noise-free communication for the 4-20 mA HART loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Management and Heat Dissipation:\u003c\/strong\u003e Ensure the cabinet's internal cooling vents are completely unobstructed. The module dissipates a rated heating value of 230 W (828 x 10^3 J\/h); maintaining clear airflow paths is necessary to prevent thermal stress within the enclosure during continuous duplex operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Cable Isolation:\u003c\/strong\u003e Run AC utility power supply lines (100-120 VAC or 220-240 VAC) in separate steel conduits from the low-voltage DC communication and instrument signal cables. This physical segregation prevents high-voltage inductive coupling from corrupting the internal high-speed RIO bus.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":45256566997107,"sku":"AFG20D","price":233.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/AFS40S_1_a3351e5b-5217-4fdc-9e9f-a1c5b8e9df9a.jpg?v=1784259524","url":"https:\/\/www.dcssupplier.com\/ar\/products\/yokogawa-afg20d-duplexed-field-control-unit","provider":"DcsSupplier Limited","version":"1.0","type":"link"}