{"product_id":"woodward-9905-376-24vdc-digital-governor-new-original","title":"Woodward 9905-376 24VDC Digital Governor New Original","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe Woodward 9905-376 serves as a high-precision digital governor designed specifically for single-valve steam turbines. As part of the globally recognized 505\/505E series, this controller manages speed regulation, extraction\/admission sequencing, and load sharing with millisecond accuracy. We supply this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% brand new and original\u003c\/strong\u003e, ensuring critical infrastructure remains operational without the risks associated with used or refurbished hardware.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\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\u003eTechnical Details\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\u003eModel\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e9905-376\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\u003eWoodward 505 \/ 505E\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePower Input\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e18–40 VDC (24 VDC Nominal, 12W)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eActuator Outputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 Dedicated Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eAnalog Inputs\/Outputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6 Configurable Analog Outputs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDiscrete Inputs\/Outputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 Discrete Outputs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eUser Interface\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2-line, 24-character LCD with multi-function keypad\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCommunication\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eRS-232 \/ RS-422 supporting Modbus RTU\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e–20 °C to +60 °C (–4 °F to +140 °F)\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\u003e4.13 kg (9.1 lbs)\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\u003cp\u003e\u003cstrong\u003eIntegrated Operator Control Panel (OCP)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 9905-376 eliminates the need for external HMI hardware in basic setups. The front-mounted 24-character LCD provides real-time feedback on turbine speed, load, and valve position. Operators use the integrated keypad to adjust setpoints or configure PID parameters directly at the machine level, streamlining commissioning and localized monitoring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePrecision Extraction\/Admission Management\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUnlike standard governors, this 505E-tier module handles split-range actuator configurations and single extraction systems. It automatically calculates the complex relationships between inlet flow, extraction flow, and electrical load to maintain constant header pressure and grid frequency simultaneously.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRobust Communication and Data Logging\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module utilizes Modbus RTU protocols via RS-232 or RS-422 ports to bridge the gap between field mechanicals and the central DCS. It transmits critical diagnostic data and alarm logs, allowing plant engineers to predict maintenance needs and analyze turbine trips with high-resolution timestamps.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIndustrial Grade Durability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for the heat and vibration of turbine decks, the 9905-376 maintains stable operation in temperatures up to 60 °C. The internal circuitry features high-grade isolation to protect the processor from electromagnetic interference, provided the installer maintains a grounding resistance of less than 4 Ω.\u003c\/p\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the Woodward 9905-376 support both isochronous and droop modes?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The controller provides flexible speed control logic. You can select Isochronous mode for constant frequency in isolated grids or Droop mode for stable load sharing when paralleled with a utility utility.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this unit compatible with existing 505 series installations?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 9905-376 acts as a direct replacement for various discontinued 505-series part numbers. However, because turbine dynamics vary, you must transfer and verify the PID tuning parameters from the old unit to the new digital module to ensure stable governor response.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat power supply is required for stable operation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unit operates on a wide DC range of 10–40 VDC (24V nominal). It consumes approximately 12 Watts. To prevent unexpected resets or communication drops, you must use a filtered, industrial-grade power source.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I configure this module for a split-range actuator setup?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAbsolutely. The 9905-376 specifically includes logic to drive two separate actuator channels, making it ideal for turbines that utilize both a primary control valve and an extraction or admission valve.\u003c\/p\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":44169392848995,"sku":"9905-376","price":530.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/173_eecd1b90-4fba-4c78-9ebb-317771a9cf99.jpg?v=1778298756","url":"https:\/\/www.autocontrolglobal.com\/products\/woodward-9905-376-24vdc-digital-governor-new-original","provider":"AutoControl Global","version":"1.0","type":"link"}