{"product_id":"abb-hiee450964r0001-sa9923a-e-circuit-board","title":"ABB HIEE450964R0001 SA9923A-E Circuit Board","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe ABB HIEE450964R0001 (SA9923A-E) is a specialized circuit board designed specifically for deployment within ABB UNITROL excitation systems. This dedicated control and interface module plays a critical role in managing excitation control logic, firing pulses, and regulator functions to maintain stable synchronous generator operation across power generation and heavy industrial facilities.\u003c\/p\u003e\n\u003cp\u003eEngineered for high reliability in continuous power applications, the SA9923A-E circuit board integrates directly into the UNITROL rack architecture, interfacing smoothly with neighboring processor and I\/O cards. It processes internal system signals and communicates diagnostic metrics to ensure continuous generator field regulation and rapid fault detection during changing load conditions.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOriginal ABB component designed for UNITROL excitation system platforms\u003c\/li\u003e\n  \u003cli\u003ePrecision surface-mount circuitry engineered for stable electrical performance in high-noise environments\u003c\/li\u003e\n  \u003cli\u003eIntegrated processor and interface logic for real-time excitation control loops\u003c\/li\u003e\n  \u003cli\u003eDirect rack-mounting compatibility with standard UNITROL subracks\u003c\/li\u003e\n  \u003cli\u003eBuilt-in diagnostic indicators for fast status monitoring and troubleshooting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSynchronous generator excitation control\u003c\/li\u003e\n  \u003cli\u003ePower generation plants (hydro, thermal, and gas turbine)\u003c\/li\u003e\n  \u003cli\u003eLarge industrial synchronous motor drives\u003c\/li\u003e\n  \u003cli\u003eUtility substation power systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\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\u003eManufacturer\u003c\/td\u003e\n      \u003ctd\u003eABB\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePart Number \/ Model\u003c\/td\u003e\n      \u003ctd\u003eHIEE450964R0001\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eAlternate \/ Type Designation\u003c\/td\u003e\n      \u003ctd\u003eSA9923A-E\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProduct Family\u003c\/td\u003e\n      \u003ctd\u003eUNITROL Excitation Systems\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProduct Type\u003c\/td\u003e\n      \u003ctd\u003eCircuit Board \/ Control Module\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCountry of Origin\u003c\/td\u003e\n      \u003ctd\u003eSweden\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNet Weight\u003c\/td\u003e\n      \u003ctd\u003e0.3 kg\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDimensions\u003c\/td\u003e\n      \u003ctd\u003e2.0 cm x 19.7 cm x 26.1 cm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMounting Type\u003c\/td\u003e\n      \u003ctd\u003eRack-mounted module\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eVerify that the replacement part number (ABB HIEE450964R0001 SA9923A-E) matches the exact specifications of the unit being replaced.\u003c\/li\u003e\n  \u003cli\u003eDe-energize the UNITROL excitation cabinet and follow all lockout\/tagout (LOTO) safety procedures before handling any internal hardware.\u003c\/li\u003e\n  \u003cli\u003eInspect the replacement circuit board for any shipping damage or bent pins prior to installation.\u003c\/li\u003e\n  \u003cli\u003eSlide the circuit board carefully along the designated guide rails into the UNITROL subrack slot, ensuring proper backplane connector alignment.\u003c\/li\u003e\n  \u003cli\u003eSecure any retention fasteners to lock the board firmly into position.\u003c\/li\u003e\n  \u003cli\u003eRestore system power and verify normal LED status indicators and excitation control parameters through the system HMI or engineering software.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":52668611199339,"sku":"HIEE450964R0001 SA9923A-E","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/abb-hiee450964r0001-sa9923a-e-circuit-board-t0hef4i0gft_a2726869-617d-4ea3-9b36-c03d599b2267.jpg?v=1765535499","url":"https:\/\/www.plcprotech.com\/it\/products\/abb-hiee450964r0001-sa9923a-e-circuit-board","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}