{"product_id":"bently-nevada-125792-01-3500-25-keyphasor-module","title":"Bently Nevada 125792-01 3500\/25 Keyphasor Module","description":"\u003cp\u003eConfigured for high-precision timing phase measurements in Bently Nevada 3500 Series Machinery Protection Systems, the \u003cstrong\u003eBently Nevada 125792-01\u003c\/strong\u003e (\u003cstrong\u003e3500\/25\u003c\/strong\u003e Keyphasor Module) provides direct physical\/electrical execution. The half-height module conditions raw once-per-turn or multi-event pulses from proximity probes or magnetic pickups, converting physical shaft rotations into digital timing pulses and RPM metrics. This raw conditioning layer feeds accurate phase angle and speed parameters directly across the internal backplane to vibration monitoring modules for synchronous vector tracking.\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\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\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\u003e125792-01\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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.34 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e119.9 mm x 24.4 mm x 256.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e3.2 Watts (Typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eEnhanced Keyphasor Module (Half-height)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Compatibility\u003c\/td\u003e\n\u003ctd\u003eProximity Probes (Proximitors) or Magnetic Pickups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-0.05% of full scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Resolution\u003c\/td\u003e\n\u003ctd\u003e0.1 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSampling Rate\u003c\/td\u003e\n\u003ctd\u003e1000 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Output\u003c\/td\u003e\n\u003ctd\u003e4-20 mA (proportional to speed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Density\u003c\/td\u003e\n\u003ctd\u003e2 independent Keyphasor channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eMachinery Monitoring and TSI Features\u003c\/h3\u003e\n\u003cp\u003eThe module provides structural management for eddy-current probe scaling when translating physical shaft discontinuities (such as notches or keyways) into uniform timing indicators. Field technicians must complete gap voltage validation to ensure proximity transducer targets maintain stable dc bias levels within the nominal -10 VDC operational envelope. The unit routes continuous speed measurements directly through the internal rack bus, enabling rapid cross-talk suppression and real-time computation of complex rotor dynamics parameters, including shaft centerline plots, polar trends, and filtered vector vectors.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the half-height form factor affect chassis mounting and slot layout constraints?\u003c\/p\u003e\n\u003cp\u003eA: The half-height design occupies one lower or upper half-slot within the 3500 chassis. It requires a half-height wave guide and a matching half-height I\/O module positioned directly behind it to guarantee proper backplane alignment.\u003c\/p\u003e\n\u003cp\u003eQ: What is the calibrated tracking accuracy for raw speed monitoring applications?\u003c\/p\u003e\n\u003cp\u003eA: The module executes speed monitoring calculations with a steady-state accuracy profile of +\/-0.05% of the selected full scale, resolving speed variations down to 0.1 RPM at a 1000 Hz internal sampling loop rate.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransducer Gap Verification:\u003c\/strong\u003e Measure the dc gap voltage of the connected proximity probe using a digital multimeter prior to system startup. Adjust the probe depth to secure a -10 VDC target base over the uniform cylindrical surface of the shaft.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Continuity Management:\u003c\/strong\u003e Route the transducer extension cables in dedicated, isolated conduits. Terminate the outer braided shields cleanly at the 3500 terminal block ground point only, preventing structural shield loops at the machine housing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic Pickup Air-Gap Setting:\u003c\/strong\u003e When using magnetic pickup sensors, set the physical air gap between the sensor face and the gear tooth gear to the exact manufacturer specification to avoid signal clipping or missing pulses at low startup velocities.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":42870882107482,"sku":"3500\/25 125792-01","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/414.jpg?v=1773019413","url":"https:\/\/www.spareoil.com\/products\/bently-nevada-125792-01-3500-25-keyphasor-module","provider":"SpareOil Automation","version":"1.0","type":"link"}