{"product_id":"woodward-9905-971-discrete-input-module-24-channels","title":"Woodward 9905-971 Discrete Input Module | 24 Channels","description":"\u003ch2\u003eWoodward 9905-971 Technical Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eWoodward 9905-971\u003c\/strong\u003e is an industrial-grade Discrete Input Module designed by Woodward for critical control systems. Featuring a lightweight construction of approximately 0.45 kg (1.0 lbs), it accepts up to 24 contact inputs operating at 24 VDC wetting voltage with a fast 5 ms update time and 1 ms time-stamping resolution. Built with latent fault detection across its relay outputs, this module disengages safely via front-panel ejector handles and secures directly into the control chassis motherboard.\u003c\/p\u003e\n\n\u003ch2\u003ePart Number Breakdown\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e9905:\u003c\/strong\u003e Woodward Control Hardware \u0026amp; I\/O Module Series\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e-971:\u003c\/strong\u003e Specific Model Designator — 24-Channel 24 VDC Discrete Input Transducer Board\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications Table\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"text-align: left;\"\u003e\n      \u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eParameter\u003c\/th\u003e\n      \u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eManufacturer \/ Brand\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eWoodward\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eFull Part Number\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003e9905-971\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eProduct Type\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eDiscrete Input Module\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eNumber of Channels\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e24 Channels (4 Modules \/ 6 Contact Inputs per Module)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eDiscrete Input Voltage\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e24 VDC Nominal Contact Wetting Voltage\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eExternal Power Options\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e18–32 VDC or 100–150 VDC External Source\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003ePerformance Resolution\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e5 ms Update Time \/ 1 ms Time Stamping Resolution\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eFault Detection System\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eLatent Fault Detection (Series-Parallel Relay Readback)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003ePhysical Weight\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eApprox. 0.45 kg (1.0 lbs) Standard Module Weight\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eMounting \u0026amp; Hardware\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eChassis Card Guides \/ Motherboard Connectors with Top \u0026amp; Bottom Retaining Screws\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eCountry of Manufacture\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eUnited States (USA)\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features \u0026amp; Hardware Configurations\u003c\/h2\u003e\n\u003cp\u003eFeatures 24 isolated inputs, 24VDC wetting, latent fault relay detection, 0.45 kg weight, 5ms update time, and USA origin.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions (FAQs)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: What are the main specs of the Woodward 9905-971 module?\u003c\/strong\u003e\u003cbr\u003e\nA1: 24 discrete channels, 24 VDC input voltage, 5 ms update time, 1 ms time-stamping, and 0.45 kg weight.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ2: How does latent fault detection work on this module?\u003c\/strong\u003e\u003cbr\u003e\nA2: It uses a series-parallel relay configuration with readback circuitry to test relays without altering output state.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ3: How is contact wetting power provided to the discrete inputs?\u003c\/strong\u003e\u003cbr\u003e\nA3: Power can be sourced internally (via terminal jumpers 33–35) or externally via 18–32 VDC \/ 100–150 VDC.\u003c\/p\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":52730889764996,"sku":"9905-971","price":166.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/7454\/7844\/files\/9905-971.jpg?v=1787981022","url":"https:\/\/www.etowonauto.com\/vi\/products\/woodward-9905-971-discrete-input-module-24-channels","provider":"Etowon Auto","version":"1.0","type":"link"}