{"product_id":"foxboro-761cna-at-760-series-single-station-controller","title":"Foxboro 761CNA-AT 760 Series Single Station Controller","description":"\u003ch2\u003eFoxboro 761CNA-AT Single Station Micro Plus Controller\u003c\/h2\u003e\n\u003cp\u003eConfigured for dynamic compensation and assignable process alarms in DCS and advanced single-loop applications, the \u003cstrong\u003eFoxboro 761CNA-AT\u003c\/strong\u003e (\u003cstrong\u003e761CNA\u003c\/strong\u003e Single Station Micro Plus Controller) provides direct physical\/electrical execution across continuous process control networks. The controller processes standard field analog signals and executes full proportional, integral, and derivative (PID) algorithms via an integrated front panel keypad. Designed with a 32-position terminal block, nonvolatile memory backup, and modular retrofitting capability, the hardware maintains deterministic loop execution through sudden main supply interruptions.\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\u003e761CNA-AT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFoxboro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3.6 kg (8.6 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e17.8 cm x 7.6 cm x 50.8 cm (7.0 in x 3.0 in x 20.0 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e120 VAC, 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eStandard internal power transformer load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eSingle Station Micro Plus Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal\u003c\/td\u003e\n\u003ctd\u003e4-20 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-0.25% of span typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e2 s or less\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Modes\u003c\/td\u003e\n\u003ctd\u003eProportional, Reset (Integral), Derivative, PID\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProportional Band\u003c\/td\u003e\n\u003ctd\u003eAdjustable 4% to 400%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReset (Integral)\u003c\/td\u003e\n\u003ctd\u003eAdjustable 0.01 to 50 min\/repeat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDerivative\u003c\/td\u003e\n\u003ctd\u003eAdjustable 0.05 to 50 min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring Termination\u003c\/td\u003e\n\u003ctd\u003e32-position terminal block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eNEMA 3 \/ IP53\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eShelf-mount or retrofit into standard Foxboro shelves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control \u0026amp; 4-20 mA Loop Architecture\u003c\/h3\u003e\n\u003cp\u003eThe unit integrates standard 4-20 mA DC analog current loop processing with internal cold-junction compensation pathways and isolated signal conditioning stages. Channel-to-channel isolation hardware mitigates ground-loop noise across industrial sensor installations, maintaining signal accuracy within +\/-0.25% of span. The internal firmware continuously samples incoming 4-20 mA process variables (PV), updates internal setpoint calculations, and drives physical control elements without latency degrade. Nonvolatile memory registers store custom control logic and user parameters without requiring battery backup, ensuring deterministic startup and state recovery following a total 120 VAC power interruption.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the controller retain configuration parameters during a sudden AC power loss?\u003c\/p\u003e\n\u003cp\u003eA: The module relies on integrated nonvolatile memory to maintain logic control routines, tuning values, and alarm parameters. When 120 VAC main power restores, the hardware boots directly into operational state without parameter loss or recalibration requirements.\u003c\/p\u003e\n\u003cp\u003eQ: What mounting configurations are supported for retrofitting older installations?\u003c\/p\u003e\n\u003cp\u003eA: The chassis uses a standardized shelf-mount enclosure designed for direct insertion into existing Foxboro 760 Series panel shelves, connecting to field loops via the rear 32-position terminal block.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply Integrity:\u003c\/strong\u003e Confirm main power source delivers steady 120 VAC, 50\/60 Hz power prior to energizing the module terminal blocks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielding and Grounding:\u003c\/strong\u003e Terminate 4-20 mA signal cable shielding at a single system earth point to prevent circulating ground currents from corrupting analog inputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Conductors:\u003c\/strong\u003e Strip field signal wires to recommended lengths and secure firm physical contact inside the 32-position terminal block, avoiding loose wire strands near adjacent terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Management:\u003c\/strong\u003e Maintain adequate vertical and horizontal clearance inside the instrument enclosure to prevent thermal buildup past the upper operating limit of +85 deg C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure Protection:\u003c\/strong\u003e Verify panel cutouts and rack seals meet NEMA 3 \/ IP53 standards when operating in environments exposed to ambient dust or condensation.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Foxboro","offers":[{"title":"Default Title","offer_id":43969153138778,"sku":"761 CNA-AT","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/472._bce3ff13-52c6-4eac-b294-eaf89fad507b.jpg?v=1788162549","url":"https:\/\/www.spareoil.com\/products\/foxboro-761cna-at-760-series-single-station-controller","provider":"SpareOil Automation","version":"1.0","type":"link"}