{"product_id":"woodward-9905-002-2301a-high-voltage-speed-controller","title":"Woodward 9905-002 2301A High Voltage Speed Controller","description":"\u003ch3\u003e\u003cspan\u003eOverview\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan\u003e9905-002\u003c\/span\u003e is a high-voltage powered governor module from the Woodward 2301A control family, developed for engine-driven generator applications. Unlike low-voltage variants, the \u003cspan\u003e9905-002\u003c\/span\u003e operates directly from AC or high-level DC sources, making it suitable for installations where 24 VDC is not available.\u003c\/p\u003e\n\u003cp\u003eThis unit continuously interprets speed signals from a magnetic pickup and adjusts actuator current output to regulate fuel delivery. It ensures stable frequency control and coordinated load distribution across parallel generator systems.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eDetails\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\u003e\u003cspan\u003e9905-002\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Series\u003c\/td\u003e\n\u003ctd\u003e2301A Load Sharing \u0026amp; Speed Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e88–132 VAC or 90–150 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed Input\u003c\/td\u003e\n\u003ctd\u003eMagnetic Pickup (1–30 Vrms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e500 to 12,000 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActuator Output\u003c\/td\u003e\n\u003ctd\u003e0–200 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e10–15 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Style\u003c\/td\u003e\n\u003ctd\u003eChassis Mount (Sheet Metal Housing, IP20)\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\u003e\u003cspan\u003eFunctional Description\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan\u003e9905-002\u003c\/span\u003e acts as the central control element in an electronic governing system. It compares actual engine speed against a reference setpoint and dynamically adjusts actuator output to maintain the desired operating condition.\u003c\/p\u003e\n\u003cp\u003eIts control strategy is based on a PID loop, enabling stable performance even under rapid load fluctuations.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cspan\u003eFlexible Operating Modes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eSupports both isochronous and droop configurations. Isochronous mode maintains constant speed regardless of load changes, while droop mode enables controlled frequency variation for parallel generator operation.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIntegrated Load Sharing Capability\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eIncludes dedicated load-sharing interfaces that allow multiple controllers to exchange load signals. This ensures balanced kW distribution across generators and prevents uneven loading conditions.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eRemote Speed Adjustment\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eProvides an input for an external potentiometer, allowing operators to fine-tune engine speed from a control panel without direct access to the module.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eStable Actuator Drive Output\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 0–200 mA analog output is optimized for Woodward actuators, delivering precise and consistent fuel control across different engine types.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cspan\u003eControl Tuning and Dynamics\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe controller allows manual adjustment of dynamic response parameters:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eGain: Defines proportional sensitivity to speed deviations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReset: Eliminates steady-state offset through integral action\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eActuator Compensation: Matches output behavior to actuator response characteristics\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese parameters enable fine tuning for various engine sizes and fuel systems, minimizing oscillation and improving stability.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cspan\u003eApplication Areas\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan\u003e9905-002\u003c\/span\u003e is commonly deployed in:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eDiesel and gas generator sets\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIndustrial turbine auxiliary systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePower plant control panels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRetrofit projects replacing mechanical or legacy governors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt is particularly useful in facilities where higher voltage supplies are standard.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cspan\u003eComparison with 9905-211\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eAlthough both belong to the same 2301A platform, their power requirements differ:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e9905-002\u003c\/span\u003e: High-voltage AC\/DC input\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e9905-211\u003c\/span\u003e: Low-voltage 24 VDC input\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePerformance and control capabilities remain consistent across both models, with selection driven by available power infrastructure.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cspan\u003eFAQ\u003c\/span\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cspan\u003eWhat type of sensor is required for speed input?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eA magnetic pickup sensor is required, providing a frequency signal proportional to shaft rotation.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCan this unit control multiple generators in parallel?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eYes, when connected through load-sharing lines, it enables coordinated load distribution across multiple units.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIs it suitable for retrofit applications?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eYes, it is widely used to upgrade older governing systems to modern electronic control.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat safety precautions are required?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eDue to high-voltage operation, proper grounding is mandatory. Always isolate power before performing wiring or configuration changes.\u003c\/p\u003e","brand":"WOODWARD","offers":[{"title":"Default Title","offer_id":44092066594915,"sku":"9905-002","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/2775\/3315\/files\/9905-002-2.jpg?v=1774937025","url":"https:\/\/precisemodule.com\/products\/woodward-9905-002-2301a-high-voltage-speed-controller","provider":"Precise Module Ltd.","version":"1.0","type":"link"}