{"product_id":"woodward-8901-457-723plus-digital-speed-controller-diesel-gas-engines-marine-propulsion-power-generation","title":"Woodward 8901-457 | 723PLUS Digital Speed Controller | Diesel \u0026 Gas Engines | Marine Propulsion \u0026 Power Generation","description":"\u003ch3\u003eShopify Product Title:\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eWoodward 8901-457 | 723PLUS Digital Speed Control | Power Generation \u0026amp; Marine Propulsion | Diesel \u0026amp; Gas Engines\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eProduct Description:\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan\u003eWoodward 8901-457\u003c\/span\u003e is a \u003cspan\u003edigital speed control\u003c\/span\u003e unit within the \u003cspan\u003e723PLUS Series\u003c\/span\u003e, designed to manage the speed and load of large reciprocating engines and small turbines. This \u003cspan\u003emicroprocessor-based controller\u003c\/span\u003e is ideal for use in \u003cspan\u003epower generation\u003c\/span\u003e and \u003cspan\u003emarine propulsion\u003c\/span\u003e systems, where precise load sharing and synchronization between engines are crucial.\u003c\/p\u003e\n\u003cp\u003eThe \u003cspan\u003e8901-457\u003c\/span\u003e functions as the primary governor for \u003cspan\u003ediesel\u003c\/span\u003e or \u003cspan\u003egas engines\u003c\/span\u003e and \u003cspan\u003esmall steam or gas turbines\u003c\/span\u003e, ensuring efficient operation with minimal speed fluctuations. By continuously monitoring engine speed through \u003cspan\u003eMagnetic Pickups (MPUs)\u003c\/span\u003e, it adjusts the fuel or steam flow using sophisticated \u003cspan\u003ePID (Proportional-Integral-Derivative) control\u003c\/span\u003e, which eliminates the issue of \u003cspan\u003e\"hunting\"\u003c\/span\u003e (speed oscillations) often seen in older analog governors.\u003c\/p\u003e\n\u003cp\u003eThis high-performance \u003cspan\u003edigital speed control\u003c\/span\u003e is optimized for industrial settings that require high reliability and precision, such as \u003cspan\u003epower plants\u003c\/span\u003e, \u003cspan\u003emarine propulsion systems\u003c\/span\u003e, and \u003cspan\u003eindustrial generator sets\u003c\/span\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\" width=\"NaN\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003e\u003cspan\u003eFeature\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel Number\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan\u003e8901-457\u003c\/span\u003e (723PLUS Series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInput Power\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e18 to 40 VDC (24 VDC Nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Consumption\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMax 40 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSpeed Inputs\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e2 Magnetic Pickup (MPU) or Proximity Probes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eAnalog Inputs\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e4 Configurable (4-20 mA, 0-5 V, or ±2.5 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eAnalog Outputs\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e2 Actuator Driver Outputs (0-20 mA or 0-200 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eDiscrete Inputs\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e8 Configurable (Run\/Stop, Raise\/Lower, Idle\/Rated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eDiscrete Outputs\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e3 Relay Outputs (Shutdown, Alarm, Status)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCommunication\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eRS-232, RS-422, or RS-485 (Modbus RTU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperating Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +70°C (-40°F to +158°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features \u0026amp; Benefits:\u003c\/h3\u003e\n\u003col class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDual Dynamic Speed Control\u003c\/span\u003e:\u003cbr\u003eThe \u003cspan\u003e8901-457\u003c\/span\u003e can store two distinct \u003cspan\u003ePID settings\u003c\/span\u003e, allowing it to operate under both \u003cspan\u003eIsochronous (Off-Grid)\u003c\/span\u003e and \u003cspan\u003eParallel\/Droop (On-Grid)\u003c\/span\u003e modes. This is particularly useful for \u003cspan\u003egenerator sets\u003c\/span\u003e or turbines that need to stabilize speed when isolated or when synchronized with the grid.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eVersatile Load Sharing\u003c\/span\u003e:\u003cbr\u003eFor systems with multiple engines, the \u003cspan\u003e8901-457\u003c\/span\u003e enables \u003cspan\u003eanalog load sharing\u003c\/span\u003e. This ensures that the electrical load is distributed equally across multiple generators, preventing one engine from overfueling while another engine lags, a crucial function for preventing damage and inefficiencies.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCustomizable Digital Programming\u003c\/span\u003e:\u003cbr\u003eConfigured through \u003cspan\u003eWoodward's Watch Window software\u003c\/span\u003e or \u003cspan\u003ehandheld programmer\u003c\/span\u003e, the unit allows engineers to adjust critical parameters like \u003cspan\u003eStart Fuel Limits\u003c\/span\u003e, \u003cspan\u003eAcceleration Ramps\u003c\/span\u003e, and \u003cspan\u003eOverspeed Protection\u003c\/span\u003e to optimize engine performance and prevent damage during startup or under heavy load conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFlexible Actuator Control\u003c\/span\u003e:\u003cbr\u003eWith two independent actuator outputs, the \u003cspan\u003e8901-457\u003c\/span\u003e can easily manage dual-fuel engines or engines with \u003cspan\u003etwin fuel racks\u003c\/span\u003e. It supports both \u003cspan\u003elow-current\u003c\/span\u003e and \u003cspan\u003ehigh-current\u003c\/span\u003e \u003cspan\u003eWoodward actuators\u003c\/span\u003e, providing flexibility for various engine types.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"WOODWARD","offers":[{"title":"Default Title","offer_id":44090008109155,"sku":"8901-457","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/2775\/3315\/files\/8901-457.jpg?v=1774863646","url":"https:\/\/precisemodule.com\/products\/woodward-8901-457-723plus-digital-speed-controller-diesel-gas-engines-marine-propulsion-power-generation","provider":"Precise Module Ltd.","version":"1.0","type":"link"}