{"product_id":"bently-nevada-3500-50-01-01-02-3500-50m-tachometer-module","title":"Bently Nevada 3500\/50-01-01-02 3500\/50M Tachometer Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/25-01-01-02\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-precision, 2-channel instrument designed to provide continuous rotative speed and acceleration measurements for critical machinery. As a fundamental component of the Bently Nevada 3500 Machinery Protection System, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/50-01-01-02\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprocesses signals from Keyphasor transducers or magnetic pickups to deliver real-time data to the rack backplane. In heavy industrial environments such as combined-cycle power plants, petrochemical refineries, and large-scale mining operations, accurate speed monitoring is vital for overspeed protection and synchronous vibration analysis. By providing redundant speed tracking and reliable alarm setpoints, this module prevents catastrophic rotor damage during transient events, significantly reducing unplanned downtime and ensuring the mechanical integrity of high-speed turbines and compressors.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe hardware and certification profile for the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/50-01-01-02\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003econfiguration is defined as follows:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e3500\/50:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBase model for the Tachometer Module.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-01 (Number of Channels):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDual-channel tachometer card (occupies one full-height slot).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-01 (I\/O Module Type):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEquipped with an I\/O module featuring Internal Terminations, which eliminates the need for external terminal strips and simplifies cabinet wiring.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-02 (Agency Approval):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCertified for CSA\/NRTL\/C, meeting North American safety standards for industrial electrical equipment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNote on Migration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFor modern installations requiring Chinese regional compliance, this model has been superseded by the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/50-01-CN\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eAttribute\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification Details\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3500\/50-01-01-02\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBently Nevada (Baker Hughes)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eU.S.A.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Channels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 Independent Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSignal Input\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMagnetic Pickups or Proximity Transducers\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eI\/O Termination\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eInternal Terminations\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eAccuracy\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e+\/- 0.01 percent of full-scale\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-30 to +65 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5.8 Watts typical\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eShipping Weight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3.0 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOperations \u0026amp; Maintenance FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan this module provide overspeed protection?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile the 3500\/50 provides highly accurate speed monitoring and alarm setpoints, it is generally utilized for machinery protection and condition monitoring. For dedicated, emergency emergency trip functions, it is often used in conjunction with the 3500\/53 Electronic Overspeed Detection System.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the advantage of Internal Terminations (Option 01)?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Internal Terminations option allows you to wire the transducer field cables directly to the I\/O module at the rear of the 3500 rack. This reduces the number of connection points in the signal loop, minimizing potential failure points and reducing the physical space required inside the control cabinet.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does this module handle zero-speed monitoring?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 3500\/50 is capable of very low-speed monitoring, but for true zero-speed detection (e.g., turning gear operation), the transducer and target notch must be correctly configured to provide a sufficient signal-to-noise ratio at near-zero RPM.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eEngineering \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSignal Threshold and Hysteresis\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTo ensure stable speed readings, the trigger threshold must be configured via the 3500 Rack Configuration Software. For proximity probes observing a notch, the threshold should be set to the mid-point of the pulse. Proper hysteresis settings are essential to prevent \"double-triggering\" caused by shaft runout or electrical noise, which can lead to false high-speed alarms or trips.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWiring and Shielding for High-Speed Assets\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor high-frequency speed signals (up to 20,000 Hz), use high-quality twisted-pair shielded cable. The shield must be grounded at the 3500 rack I\/O module only. Improper grounding can introduce common-mode noise that manifests as erratic speed fluctuations. Ensure the field wiring for the tachometer is physically separated from high-voltage power cables to avoid electromagnetic interference.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRetrofit Compatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/50-01-01-02\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis fully compatible with standard 3500 racks. If replacing an older unit, ensure the I\/O module type (Internal vs. External Terminations) matches your existing field wiring infrastructure to avoid the need for re-terminating cables during a maintenance window.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52668317663595,"sku":"3500\/50-01-01-02","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/350050-01-01-02-ufdubesg21s_d5a0df16-66c2-40c5-aafa-ccc3a0d4f3ba.jpg?v=1765521077","url":"https:\/\/www.plcprotech.com\/products\/bently-nevada-3500-50-01-01-02-3500-50m-tachometer-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}