{"product_id":"bently-nevada-990-04-70-02-00-990-series-2-wire-vibration-transmitter","title":"Bently Nevada 990-04-70-02-00 990 Series 2-Wire Vibration Transmitter","description":"\u003ch2\u003eBently Nevada 990-04-70-02-00 990 Vibration Transmitter\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBently Nevada 990-04-70-02-00\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e990-04-70-02-00\u003c\/strong\u003e 2-Wire Vibration Transmitter, operates as a dedicated hardware component for converting eddy-current probe signals into a proportional 4-20 mA current loop within machinery monitoring networks.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eOption Code\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDesignator\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eEngineering Definition\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\u003e990\u003c\/td\u003e\n\u003ctd\u003eVibration Transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-Scale\u003c\/td\u003e\n\u003ctd\u003e-04\u003c\/td\u003e\n\u003ctd\u003e0 to 4 mils pp (0 to 100 um pp)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Length\u003c\/td\u003e\n\u003ctd\u003e-70\u003c\/td\u003e\n\u003ctd\u003e7.0 meters (23.0 feet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e-02\u003c\/td\u003e\n\u003ctd\u003eBulkhead screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAgency Approval\u003c\/td\u003e\n\u003ctd\u003e-00\u003c\/td\u003e\n\u003ctd\u003eNot required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\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\u003e990-04-70-02-00\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\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.82 kg (Shipping weight 2.0 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e100 mm x 74 mm x 53.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eStandard industrial ambient range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eLoop powered, +12 to +35 VDC input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-Scale Range\u003c\/td\u003e\n\u003ctd\u003e0 to 4 mils pp (0 to 100 um pp)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e4-20 mA DC, 2-wire proportional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e+\/- 1.5% of full-scale (excluding probe factor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProbe Gap Target\u003c\/td\u003e\n\u003ctd\u003e0.5 to 1.75 mm (20 to 55 mils)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoop Resistance\u003c\/td\u003e\n\u003ctd\u003eMaximum 1,000 ohms at 35 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Defeat\u003c\/td\u003e\n\u003ctd\u003eDrops below 3.6 mA within 100 us under Not OK condition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eEddy-Current Probe Scaling \u0026amp; Rotor Dynamics Validation\u003c\/h3\u003e\n\u003cp\u003eThe unit operates directly with a 3300 NSv proximity probe system over a total electrical system length of 7.0 meters. Correct operation relies on precise eddy-current probe scaling to establish an accurate gap voltage validation targeting -10 VDC at the linear center of the probe range. Internal signal conditioning processes high-frequency rotor dynamics and provides cross-talk suppression between adjacent channels before driving the isolation circuit to send the 4-20 mA signal to the DCS or PLC.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the transmitter handle system fault detection during probe lead disconnects?\u003c\/p\u003e\n\u003cp\u003eA: The internal logic executes a rapid fault response that drops the loop current output below 3.6 mA within 100 us when a Not OK condition occurs, allowing downstream control systems to detect wire breaks immediately.\u003c\/p\u003e\n\u003cp\u003eQ: What mounting configuration does the -02 option suffix specify for hardware installation?\u003c\/p\u003e\n\u003cp\u003eA: The -02 suffix designates a bulkhead screw mounting chassis designed for direct mechanical fastening onto flat enclosure surfaces using hardware fasteners rather than DIN-rail clips.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the transmitter chassis firmly onto a flat surface using the designated bulkhead mounting holes. Ensure that the 3300 NSv probe and extension cable total length equals exactly 7.0 meters to maintain accurate eddy-current probe scaling. Route coaxial probe leads in isolated, grounded conduit away from high-voltage motor power leads to prevent cross-talk noise coupling. Terminate the 2-wire 4-20 mA loop cable using twisted-pair shielded wire, connecting the cable shield to the main plant earth ground at a single point inside the control panel.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":44480487850083,"sku":"990-04-70-02-00","price":480.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/522._39ff5c29-8af0-4d5f-876f-437362bc57a4.jpg?v=1786670130","url":"https:\/\/www.autocontrolglobal.com\/products\/bently-nevada-990-04-70-02-00-990-series-2-wire-vibration-transmitter","provider":"AutoControl Global","version":"1.0","type":"link"}