{"product_id":"woodward-9905-976-digital-overspeed-protection","title":"Woodward 9905-976 Digital Overspeed Protection","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e9905-976\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a safety-critical overspeed protection system from the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eProTech 203 series\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edeveloped by Woodward, Inc.. It is designed to protect high-speed rotating machinery such as steam turbines, gas turbines, and large reciprocating engines from catastrophic overspeed conditions.\u003c\/p\u003e\n\u003cp\u003eThe module uses triple-modular redundant (TMR) voting logic to provide high-reliability safety shutdown decisions. When a preset speed threshold is exceeded, the system triggers emergency shutdown outputs within milliseconds to protect mechanical components and downstream processes.\u003c\/p\u003e\n\u003cp\u003eIt replaces traditional mechanical trip mechanisms with electronic sensing using magnetic pickup or proximity probe signals, filtering noise and transient disturbances to avoid nuisance trips. The ruggedized design allows installation near prime movers in harsh industrial environments.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\u003e9905-976\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOverspeed protection \u0026amp; safety shutdown logic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e24 V DC nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeed Sensing Inputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMPU sensors \/ active proximity probes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Speed Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProgrammable based on application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSafety Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeavy-duty relay outputs (Alarm \/ ESD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunication Protocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eModbus RTU; Ethernet expansion supported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVibration-resistant industrial enclosure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDIN rail or rear-panel mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e–40°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.1 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120 × 100 × 60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003ePower generation turbine protection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePetrochemical and refinery compressor protection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBoiler feed pump overspeed monitoring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCritical rotating equipment safety systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan the system be tested while the turbine is running?\u003c\/strong\u003e\u003cbr\u003eYes. The ProTech 203 platform supports channel-level testing and speed simulation without requiring full shutdown.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat if the speed sensor fails?\u003c\/strong\u003e\u003cbr\u003eThe module includes sensor diagnostics and can be configured to trigger alarm or safe shutdown on signal loss.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrip response speed?\u003c\/strong\u003e\u003cbr\u003eTrip logic and relay actuation occur within milliseconds, significantly faster than mechanical overspeed protection systems.\u003c\/p\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":48746773020924,"sku":"9905-976","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/9905-9762.jpg?v=1772006490","url":"https:\/\/www.electronicplc.com\/products\/woodward-9905-976-digital-overspeed-protection","provider":"Electronic PLC","version":"1.0","type":"link"}