{"product_id":"woodward-9905-971-discrete-input-module","title":"Woodward 9905-971 Discrete Input Module","description":"\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e9905-971\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehigh-reliability distributed I\/O module\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edeveloped by\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eWoodward Inc.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eLinkNet Distributed Control Architecture\u003c\/strong\u003e. This module provides\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e16 discrete digital input channels\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor monitoring field device status in industrial automation systems.\u003c\/p\u003e\n\u003cp\u003eDesigned for mission-critical environments such as turbine control and power generation, the 9905-971 enables decentralized signal acquisition by moving field wiring closer to process equipment. The module communicates with the main controller via a proprietary high-speed serial LinkNet bus, significantly reducing installation complexity and improving system scalability.\u003c\/p\u003e\n\u003cp\u003eThe module also includes advanced\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003elatent fault detection\u003c\/strong\u003e, allowing continuous internal self-diagnostics to detect hidden electrical or logic failures before they impact control performance.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\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\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003eLinkNet Distributed I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHardware Model\u003c\/td\u003e\n\u003ctd\u003e9905-971\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e16 Discrete Inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eLinkNet Proprietary Serial Bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eOptical isolation for network protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostic Features\u003c\/td\u003e\n\u003ctd\u003eLatent fault detection + internal health monitoring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eDIN-rail or panel mount carrier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing\u003c\/td\u003e\n\u003ctd\u003eRuggedized industrial-grade enclosure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e0.5 kg \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003eApplication Scenarios\u003c\/h2\u003e\n\u003cp\u003eThe 9905-971 is commonly used in:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eGas and steam turbine control systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePower generation plants\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDistributed process automation networks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLegacy system modernization projects\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt is especially useful in facilities requiring plant-wide digital signal monitoring without rewiring centralized control cabinets.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eTechnical FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow does latent fault detection improve reliability?\u003c\/strong\u003e\u003cbr\u003eThe module performs internal self-tests to ensure input detection circuits are functioning correctly, helping prevent dangerous fail-to-detect failures in safety-critical systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the module hot-swappable?\u003c\/strong\u003e\u003cbr\u003eYes, but maintenance should follow\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eWoodward\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eLinkNet carrier and power supply service procedures to avoid serial bus communication interruptions during replacement.\u003c\/p\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":48746748084476,"sku":"9905-971","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/9905-9712.jpg?v=1772521831","url":"https:\/\/www.electronicplc.com\/products\/woodward-9905-971-discrete-input-module","provider":"Electronic PLC","version":"1.0","type":"link"}