{"product_id":"87971-01-bently-nevada-dual-vibration-monitor-operator","title":"87971-01 | Bently Nevada | Dual Vibration Monitor Operator","description":"\u003ch2\u003eBently Nevada 87971-01 3300\/16 Dual Vibration Monitor Operator\/Main Circuit Board Assembly\u003c\/h2\u003e\n\u003cp\u003eConfigured for signal processing and control execution in the Bently Nevada 3300 Machinery Protection System, the \u003cstrong\u003eBently Nevada 87971-01\u003c\/strong\u003e (\u003cstrong\u003e87971-01\u003c\/strong\u003e circuit board assembly) provides direct electrical execution within 3300\/16 Dual Vibration Monitor module architecture.\u003c\/p\u003e\n\u003cp\u003eThe assembly functions as the operator and main processing interface for two-channel proximity probe vibration measurement. It conditions eddy-current transducer inputs, performs internal scaling referenced to probe gap voltage characteristics, and supports signal routing for alarm relay logic and analog output transmission within the rack-based monitoring system. Channel processing is aligned with rotor dynamics measurement paths and includes internal validation of probe gap voltage stability and cross-channel signal integrity control.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe part number 87971-01 is treated as a fixed configuration identifier within the 3300\/16 module assembly structure. No manufacturer-published suffix segmentation or functional sub-code breakdown is defined for this ordering number.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\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\u003eModel\u003c\/td\u003e\n\u003ctd\u003e87971-01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePowered via 3300 system rack backplane (nominal DC supply from rack bus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Function\u003c\/td\u003e\n\u003ctd\u003eDual-channel radial vibration \/ shaft displacement processing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Compatibility\u003c\/td\u003e\n\u003ctd\u003e3300 \/ 3300 XL 8 mm proximity probes, 7200 series proximity systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Interfaces\u003c\/td\u003e\n\u003ctd\u003e4-20 mA proportional outputs, alarm relay contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Processing\u003c\/td\u003e\n\u003ctd\u003eEddy-current probe scaling, gap voltage validation, channel conditioning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBently Nevada TSI Signal Conditioning Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 87971-01 assembly implements eddy-current probe signal scaling aligned with proximity transducer calibration curves (typical 200 mV\/mil systems). Gap voltage validation is performed to ensure probe linear operating region stability, typically referenced against negative DC bias regions used in proximity measurement chains. Cross-talk suppression is implemented at channel separation level to prevent electrical interference between dual measurement paths. Signal conditioning logic is aligned with rotor dynamic displacement tracking, enabling separation of vibration amplitude and DC gap components for machinery protection processing.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 87971-01 support hot-swap replacement within an energized 3300 rack?\u003cbr\u003eA: The module is rack-inserted and backplane powered. Hot-swap behavior depends on rack configuration and system interlock state. Signal interruption is expected during insertion or removal.\u003c\/p\u003e\n\u003cp\u003eQ: How is channel isolation handled between the two vibration inputs?\u003cbr\u003eA: Channel separation is implemented through internal signal conditioning circuitry. Isolation is designed to minimize cross-channel coupling during simultaneous proximity probe operation.\u003c\/p\u003e\n\u003cp\u003eQ: What is the effect of backplane power fluctuation on measurement accuracy?\u003cbr\u003eA: Measurement stability is dependent on regulated backplane DC supply. Voltage deviation outside rack specification may affect scaling accuracy and alarm threshold consistency.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eThe assembly shall be installed only in compatible 3300 series rack slots with verified backplane alignment. Ensure all proximity probe cabling is terminated with proper coaxial shielding and grounded at a single point to avoid ground loop formation.\u003c\/p\u003e\n\u003cp\u003eMaintain separation between signal wiring and high-power conductors to reduce electromagnetic coupling. Probe extension cables shall follow manufacturer-specified routing limits to preserve eddy-current signal integrity.\u003c\/p\u003e\n\u003cp\u003eConnector seating must be fully engaged to ensure stable backplane communication. Do not apply mechanical stress to the board edge during insertion. Verify channel configuration settings prior to system commissioning to ensure correct scaling of vibration inputs.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":44306871287896,"sku":"87971-01","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/87971-01-3.jpg?v=1782984075","url":"https:\/\/www.industriaxplc.com\/id\/products\/87971-01-bently-nevada-dual-vibration-monitor-operator","provider":"IndustriaX Limited","version":"1.0","type":"link"}