{"product_id":"bently-nevada-3500-50-134938-01-tachometer-module","title":"Bently Nevada 3500\/50 134938-01 Tachometer Module","description":"\u003ch3\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/50 Tachometer Module (134938-01)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a dual-channel monitoring unit designed for continuous evaluation of rotational dynamics in high-value machinery. It is integrated into the Bently Nevada 3500 rack platform and supports real-time monitoring of speed behavior, transient events, and directional changes for protection and diagnostics.\u003c\/p\u003e\n\u003cp\u003eThe module processes signals from proximity probes and magnetic pickup sensors, converting raw pulse data into actionable machinery parameters such as rotational speed, acceleration, and direction status.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSignal Processing Capabilities\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe module supports multiple measurement functions derived from shaft rotational input:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eContinuous shaft speed measurement in RPM or Hz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRotor acceleration calculation (RPM per second)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eZero-speed detection during startup and shutdown conditions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReverse rotation identification and event logging\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSpeed band monitoring for defined operating ranges\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePeak capture for maximum and reverse rotational events\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSignal conditioning ensures stable Keyphasor-style reference output distributed through the rack backplane for system synchronization.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eInput Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eDual independent input channels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSensor compatibility:\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eEddy current proximity probes (preferred for full capability range)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMagnetic pickups (usable but limited at low-speed and directional detection scenarios)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003eInput voltage range: +10 V to –24 V DC\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInput impedance: 20 kΩ\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaximum frequency response: up to 20 kHz (sensor dependent)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLow-speed detection behavior:\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eNear-zero detection supported with proximity probes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMagnetic pickups limited by waveform stability at low RPM\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eOutput Interfaces\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003ePer-channel buffered signal output via coaxial connectors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConditioned Keyphasor signal distributed to rack backplane\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFront-panel diagnostic indicators:\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eModule health status (OK)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCommunication activity (TX\/RX)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBypass mode indication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003eAnalog proportional outputs available for trending and external visualization (non-protective function)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eOperating Configuration Modes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe module supports multiple configurable logic profiles via 3500 rack software:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eSpeed monitoring with threshold-based alarms\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSpeed monitoring with zero-speed detection logic\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCombined speed and rotor acceleration analysis\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSpeed monitoring with reverse rotation protection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSpeed band control for operational envelope supervision\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEach mode is selected based on machine type and protection strategy.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eElectrical and Environmental Data\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eTypical power consumption: 5.8 W\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOperating temperature range: –30 °C to +65 °C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRelative humidity tolerance: up to 95% non-condensing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompliance: CE, CSA, and industrial EMC requirements\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplication Scope\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eSteam and gas turbine monitoring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCentrifugal and axial compressors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIndustrial pump systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eElectric motor driven rotating assemblies\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh-speed rotating machinery protection systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: Can magnetic pickups be used for full functionality?\u003c\/strong\u003e\u003cbr\u003eThey can be used for speed measurement, but proximity probes are required for reliable low-speed, reverse rotation, and zero-speed detection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: Is this module suitable for protection systems?\u003c\/strong\u003e\u003cbr\u003eYes, it is designed as part of the 3500 rack protection and monitoring architecture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: Does it support acceleration-based alarms?\u003c\/strong\u003e\u003cbr\u003eYes, rotor acceleration monitoring can be enabled through configuration modes.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":44112754966616,"sku":"3500\/50 134938-01","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/350050-04-011_7d4338ac-4b98-46d7-a312-7fc808f6e765.jpg?v=1779184730","url":"https:\/\/www.industriaxplc.com\/products\/bently-nevada-3500-50-134938-01-tachometer-module","provider":"IndustriaX Limited","version":"1.0","type":"link"}