{"product_id":"woodward-9905-211-load-sharing-module-10-40-vdc-power","title":"Woodward 9905-211 Load Sharing Module | 10-40 VDC Power","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eWoodward 9905-211\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erepresents the digital evolution of the 2301A series, providing high-precision speed regulation and load management for engines and turbines. This microprocessor-based unit monitors rotational speed via magnetic pickups and executes precise actuator commands to maintain frequency stability. Whether managing a standalone generator in isochronous mode or balancing multiple units on a parallel bus via droop control, the 9905-211 ensures proportional load distribution and prevents system oscillations.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe 9905-211 utilizes a wide DC input range and a standard milliamp output signal to interface with modern industrial actuators.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCatalog Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e9905-211\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2301A Digital\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Power\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e10–40 VDC (24 VDC Nominal)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Signal\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0–20 mA Actuator Drive\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eControl Modes\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIsochronous and Droop Speed Control\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSpeed Range\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e100 – 10,000 RPM (Sensor Dependent)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInterface Inputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMagnetic Pickup (MPU), Analog Bias\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-40°C to +85°C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4.00 lbs (1.8 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e250 mm × 180 mm × 60 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSuperior Digital Precision:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe microprocessor-based architecture eliminates the drift associated with aging analog components. It provides repeatable, accurate speed sensing and faster response times to sudden load changes, which protects sensitive downstream electrical equipment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDual-Mode Versatility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module supports both Isochronous and Droop modes. Operators can maintain a constant frequency for isolated mission-critical loads or implement a speed-drop curve for stable load sharing when paralleling with an infinite utility bus.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 10–40 VDC power input range accommodates fluctuating battery voltages during engine cranking or charging cycles, preventing control system resets during low-voltage transients.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOptically Isolated Load Sharing:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTo prevent ground loops in multi-generator installations, the 9905-211 utilizes isolated load-sharing lines. This ensures that the parallel signal between units remains clean and free from electrical interference, even over long cable runs between control panels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRobust Actuator Driving:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 0–20 mA output signal provides a universal interface for a wide variety of Woodward and third-party fuel actuators, allowing for easy integration into both new builds and retrofit projects.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the 9905-211 replace older analog 2301A modules?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. The 9905-211 serves as a digital upgrade for many 2301A applications. However, you must verify that your actuator accepts a 0–20 mA signal and that your system voltage falls within the 10–40 VDC range. Digital units often provide better stability and diagnostics than their analog predecessors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the benefit of the 0–20 mA output over a voltage bias output?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: A current-loop signal (0–20 mA) is significantly more resistant to electromagnetic interference and voltage drops over long distances compared to a voltage-based signal. This makes the 9905-211 ideal for large engine rooms where the controller and actuator are physically separated.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I handle a \"Loss of Speed\" signal?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The 9905-211 includes safety logic that detects a failed Magnetic Pickup (MPU). If the speed signal drops below the minimum threshold while the engine is supposed to be running, the module initiates a shutdown command to the actuator to prevent an uncontrolled fuel-rack condition.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is calibration required during installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. You must adjust the gain, stability, and rated speed potentiometers to match the dynamic response of your specific engine or turbine. The digital core simplifies this process by providing a more linear and predictable response during the tuning phase.\u003c\/p\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":43169778434138,"sku":"9905-211","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/226._8bcc4767-e063-469f-a980-9023e2f70b9d.jpg?v=1775094347","url":"https:\/\/www.spareoil.com\/products\/woodward-9905-211-load-sharing-module-10-40-vdc-power","provider":"SpareOil Automation","version":"1.0","type":"link"}