{"product_id":"bently-nevada-3500-50m-286566-02-2-channel-tachometer-module","title":"Bently Nevada 3500\/50M 286566-02 2-Channel Tachometer Module","description":"\u003ch2\u003eBently Nevada 3500\/50M 286566-02 Tachometer Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for continuous shaft speed monitoring and rotor acceleration tracking in Bently Nevada 3500 Machinery Protection System platforms, the \u003cstrong\u003eBently Nevada 286566-02\u003c\/strong\u003e (\u003cstrong\u003e3500\/50M\u003c\/strong\u003e Tachometer Module) provides direct physical\/electrical execution. This 2-channel main module accepts transducer voltage inputs ranging from +10.0 V to -24.0 V from non-contacting Proximitor sensors or passive magnetic pickups. It calculates rotational speed (RPM), acceleration trends, zero-speed states, and reverse rotation events while routing conditioned Keyphasor timing pulses across the backplane to drive phase-locked data acquisition for adjacent vibration monitors.\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\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3500\/50M (286566-02)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.1 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e241 mm x 24.4 mm x 242 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-30 to +65 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5.8 W typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChannel Count\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 independent tachometer channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Signal Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e+10.0 V to -24.0 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 kOhm standard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement Functions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eShaft speed (RPM), rotor acceleration, reverse rotation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlarm Functions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOver\/under speed, speed band, zero speed, reverse rotation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackplane Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConditioned Keyphasor signals to rack monitors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompliance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAPI 670 machinery protection standard compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage Temp\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40 to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eRotor Dynamics and Gap Voltage Validation Parameters\u003c\/h3\u003e\n\u003cp\u003eThe 3500\/50M 286566-02 Tachometer Module processes rapid pulses generated by passing gear teeth or keyways without disrupting adjacent TSI modules. When utilizing eddy-current proximity probes for speed sensing, standard probe scaling (200 mV\/mil or 7.87 V\/mm) applies to the input circuit while technicians monitor target gap voltage validation (-10 VDC nominal) to confirm physical probe placement. Integrated cross-talk suppression logic preserves pulse timing precision across wide frequency spans, allowing secondary vibration monitors to calculate exact 1X\/2X phase angles, track unbalance vectors, and evaluate rotor dynamics during startup and coast-down conditions.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the 3500\/50M 286566-02 module determine reverse rotation on a machine train?\u003c\/p\u003e\n\u003cp\u003eA: By connecting two proximity transducers positioned with a physical phase offset over a multi-tooth gear, the internal processor measures the pulse sequence timing between channel 1 and channel 2 to detect reverse shaft motion.\u003c\/p\u003e\n\u003cp\u003eQ: Can the 3500\/50M 286566-02 be hot-swapped while the 3500 rack is powered?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the main module supports hot-swapping under powered rack conditions, provided personnel follow proper static dissipation procedures during removal and insertion into the chassis slot.\u003c\/p\u003e\n\u003cp\u003eQ: Does the 286566-02 main module require a companion rear I\/O card for field wiring?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the front module must pair with a compatible 3500\/50M I\/O module installed at the rear of the rack to land physical probe wiring and provide terminal interfaces.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eWhen mounting and connecting the Bently Nevada 3500\/50M 286566-02 module, adhere to the following installation sequence:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eInsert the main tachometer module into the designated full-height rack slot, seating the backplane edge connector firmly before securing the top and bottom captive screws.\u003c\/li\u003e\n\u003cli\u003eInstall the corresponding 3500\/50M I\/O card into the rear of the same slot position to complete the signal pass-through circuit.\u003c\/li\u003e\n\u003cli\u003eLand field cabling from Proximitor sensors or magnetic pickups onto the rear I\/O terminal blocks, ensuring signal polarity matches channel labeling.\u003c\/li\u003e\n\u003cli\u003eRoute speed sensor cables in isolated raceways separated from high-voltage AC lines and variable frequency drive outputs to avoid induced noise.\u003c\/li\u003e\n\u003cli\u003eGround signal cable shields at the rack single-point ground connection in accordance with API 670 installation standards.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":43092222312538,"sku":"3500\/50M 286566-02","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/229._37d01eb0-24d9-4908-b87b-edd3165f2722.jpg?v=1774249338","url":"https:\/\/www.spareoil.com\/products\/bently-nevada-3500-50m-286566-02-2-channel-tachometer-module","provider":"SpareOil Automation","version":"1.0","type":"link"}