{"product_id":"9905-972-woodward-2301d-series-datasheet-technical-manual","title":"9905-972 Woodward 2301D Series Datasheet \u0026 Technical Manual","description":"\u003ch2\u003eWoodward 9905-972 2301D Digital Control Series\u003c\/h2\u003e\n\u003cp\u003eConfigured for precise speed control and automatic load sharing in generator sets, the \u003cstrong\u003eWoodward 9905-972\u003c\/strong\u003e (\u003cstrong\u003e9905-972\u003c\/strong\u003e Digital Load Sharing and Speed Control Module) 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\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9905-972\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWoodward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5 kg (Shipping Weight: 1.30 lbs baseline package variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300 mm x 200 mm x 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to 70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDetermined by 18-32 VDC input tracking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply Input\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 to 32 VDC (Nominal 24 VDC engine battery compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeed Control Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 to 20,000 Hz frequency input range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAnalog Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6-channel analog input with 4-20 mA output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeedback Interfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMPU (magnetic pickup), analog speed reference, discrete inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eActuator Command\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePulse-Width Modulation (PWM) or analog actuator drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSerial Protocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRS-485 Modbus RTU interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRugged metal housing, panel-mounted configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eActuator Loop Feedback Response \u0026amp; Governor Regulation\u003c\/h3\u003e\n\u003cp\u003eThe module functions as a core processing engine to execute digital speed regulation through a 1 to 20,000 Hz frequency signal fed directly from a magnetic pickup (MPU) sensor. The internal 2301D logic paths run discrete proportional, integral, and derivative (PID) algorithms to adjust for dynamic speed deviations, outputting either high-frequency PWM parameters or linear 4-20 mA current vectors to the throttle actuator.\u003c\/p\u003e\n\u003cp\u003eThis dedicated actuator loop feedback response architecture stabilizes prime movers against immediate kilowatt (kW) spikes. When running in multi-unit network grids, the module interacts with external Woodward DSLC units via dedicated analog channels, matching real-time load distribution profiles to preserve frequency synchronization across isolated or utility-tied generator buses.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the 9905-972 support live hot-swap wire extraction while the generator fuel loop is active?\u003c\/strong\u003e \u003cstrong\u003eA: No.\u003c\/strong\u003e Removing the terminal links or cutting the 18-32 VDC supply path under load will drop the actuator drive current instantly. This drops the governor throttle positioning loop, triggering an immediate uncommanded engine shutdown or overspeed trip.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the unit process an sudden loss of the primary magnetic pickup speed reference?\u003c\/strong\u003e \u003cstrong\u003eA: The module executes integrated sensor tracking validation.\u003c\/strong\u003e If the magnetic pickup frequency drops below the 1 Hz operational threshold while the run confirmation state is logic high, the module flags an MPU failure alarm and sets the actuator output current to zero to isolate the fuel feed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the 6-channel analog inputs on this module register multi-mode current and voltage signals?\u003c\/strong\u003e \u003cstrong\u003eA: Yes.\u003c\/strong\u003e The 6-channel analog input matrix is configurable via the local interface or PC software tool, mapping various field sensors alongside standard 4-20 mA output lines to drive downstream governor sub-systems.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Thermal Dissipation:\u003c\/strong\u003e Secure the panel-mounted metal housing to a flat, unpainted mounting surface inside the main control enclosure. Ensure surrounding layout limits are kept clear to allow passive vertical air convention through the integrated chassis heat sinks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic Pickup (MPU) Shield Integrity:\u003c\/strong\u003e Always route the high-frequency MPU sensor circuit using specialized twisted-pair shielded cable. Terminate the drain shield solely at the designated control grounding terminal, ensuring it remains isolated at the engine casing to eliminate noise induction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Line Routing Separation:\u003c\/strong\u003e Maintain distinct structural separation between the low-voltage 4-20 mA actuator drive runs and the primary high-current generator output lines. Use grounded steel conduits for signal runs to protect the internal 2301D digital logic core from high-frequency electromagnetic fields.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":43475286786138,"sku":"9905-972","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/315_a890fd36-325e-49e9-9ae9-089b01c3e572.jpg?v=1781061461","url":"https:\/\/www.spareoil.com\/products\/9905-972-woodward-2301d-series-datasheet-technical-manual","provider":"SpareOil Automation","version":"1.0","type":"link"}