{"product_id":"bently-nevada-3500-50m-286566-02-tachometer-module-2-channel","title":"Bently Nevada 3500\/50M 286566-02 Tachometer Module 2-Channel","description":"\u003ch3\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/50M\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(Part Number\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e286566-02\u003c\/strong\u003e) is a high-precision, 2-channel Tachometer Module designed for the Bently Nevada 3500 Series Machinery Protection System. This module is engineered to accept input from proximity probes or magnetic pickups to provide continuous shaft speed monitoring, rotor acceleration data, and rotor direction detection. It acts as a critical component in the protection of turbines, compressors, and large industrial motors, where precise speed measurement is vital for both operational control and safety shutdown protocols.\u003c\/p\u003e\n\u003cp\u003eBeyond simple RPM monitoring, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e286566-02\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esupplies conditioned Keyphasor® signals to the 3500 rack backplane, allowing other monitor modules (such as vibration and position monitors) to perform phase-locked data acquisition. The module features advanced programmable alarming, including zero-speed notification, speed band alarms, and reverse rotation detection. This ensures that any deviation from safe rotor dynamics is immediately identified, protecting high-value rotating assets from mechanical failure or catastrophic overspeed events.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e:\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/50M\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e:\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e286566-02\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e: Bently Nevada (Baker Hughes)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eChannels\u003c\/strong\u003e: 2 Independent Tachometer Channels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInput Signal Range\u003c\/strong\u003e: +10.0 V to –24.0 V (supports Proximitor* and Magnetic Pickups)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMeasurement Functions\u003c\/strong\u003e: Shaft Speed (RPM), Rotor Acceleration, Rotor Direction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAlarm Types\u003c\/strong\u003e: Over\/Under Speed, Speed Band, Zero Speed, Reverse Rotation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eKeyphasor® Output\u003c\/strong\u003e: Supplies conditioned signals to rack-resident modules\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e: 20 kΩ (standard)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e: 5.8 Watts typical\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e: -30 °C to +65 °C (-22 °F to +149 °F)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePhysical Dimensions\u003c\/strong\u003e: 241 mm x 24.4 mm x 242 mm (Standard 3500 Rack Slot)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eShipping Weight\u003c\/strong\u003e: 1.1 kg (Module and packaging)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCompliance\u003c\/strong\u003e: API 670 Machinery Protection standard\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eSystem Role \u0026amp; Comparative Logic\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn a standard machinery protection configuration, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/50M\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eplays a complementary role to vibration monitors like the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/42E\u003c\/strong\u003e. While vibration modules track the physical displacement and stability of the shaft, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e286566-02\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides the temporal reference (speed and phase) required for advanced diagnostics. It is typically installed in the rack alongside other I\/O modules to ensure a complete picture of rotor dynamics. In petrochemical and power generation facilities, this synchronization is essential for accurate balancing and vibration analysis during machine startup and coast-down cycles.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan the 3500\/50M detect if a shaft starts rotating in the wrong direction?\u003c\/strong\u003eYes. When configured with two transducers monitoring the same gear or shaft, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e286566-02\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecan identify the phase sequence to trigger a reverse rotation alarm, preventing damage to pumps or compressors not designed for backward flow.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this module require a specific I\/O module?\u003c\/strong\u003eYes. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e286566-02\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emain module must be paired with a compatible 3500\/50M I\/O module (such as the 133442-01 or 133458-01) at the rear of the rack to facilitate physical sensor wiring and terminal connections.\u003c\/p\u003e","brand":"ABB","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_df6c1396-6665-4666-bbdc-ad7757936695.jpg?v=1774249338","url":"https:\/\/www.spareoil.com\/products\/bently-nevada-3500-50m-286566-02-tachometer-module-2-channel","provider":"SpareOil Automation","version":"1.0","type":"link"}