{"product_id":"990-04-50-01-cn-990-2-wire-vibration-transmitter-bently-nevada","title":"990-04-50-01-CN 990 2-Wire Vibration Transmitter | Bently Nevada","description":"\u003cp\u003eThe \u003cstrong\u003eBently Nevada 990-04-50-01-CN\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e990\u003c\/strong\u003e 2-Wire Vibration Transmitter, operates as a dedicated hardware component for proximity probe signal conditioning and 4-20 mA loop current conversion within machinery protection platforms.\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\u003eOption Description\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eTechnical Definition\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e990\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBase Model\u003c\/td\u003e\n\u003ctd\u003e2-Wire Vibration Transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e-04\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFull-Scale Option\u003c\/td\u003e\n\u003ctd\u003e0 to 100 um peak-to-peak measurement range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e-50\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem Length Option\u003c\/td\u003e\n\u003ctd\u003e5.0 meters (16.4 feet) total system length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e-01\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMounting Option\u003c\/td\u003e\n\u003ctd\u003e35 mm DIN rail clips installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e-CN\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAgency Approval Option\u003c\/td\u003e\n\u003ctd\u003eATEX\/IECEx and Chinese NEPSI hazardous area approvals\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\u003e990-04-50-01-CN\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\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eVibration Transmitters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e0 to 100 um peak-to-peak\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Length\u003c\/td\u003e\n\u003ctd\u003e5.0 meters (16.4 feet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Device\u003c\/td\u003e\n\u003ctd\u003eAccepts 1 non-contacting 3300 NSv Proximity Probe and extension cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e4-20 mA loop current proportional to vibration amplitude\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e35 mm DIN rail clips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAgency Approvals\u003c\/td\u003e\n\u003ctd\u003eATEX, IECEx, and NEPSI hazardous area marking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003ePotted internal assembly for high-humidity environments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eLoop-powered via output 4-20 mA current loop\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eGap Voltage Validation (-10 VDC Targets) \u0026amp; Cross-Talk Suppression\u003c\/h3\u003e\n\u003cp\u003eThe module conditions raw high-frequency signals from a 3300 NSv proximity probe system across a 5.0-meter system length. Non-isolated PROX OUT and COM terminals deliver direct dynamic vibration and static gap voltage signals, requiring physical probe gap voltage validation to maintain a nominal -10 VDC bias at target center. Integrated potted construction and internal filtering facilitate cross-talk suppression and signal integrity when multiple transmitters are co-located in densely wired instrument enclosures.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What mechanisms prevent false alarm tripping during power interruption or probe fault states?\u003c\/p\u003e\n\u003cp\u003eA: The transmitter incorporates a power-up inhibit circuit to block line voltage transient errors during startup, alongside a Not OK\/Signal Defeat circuit that clamps high output signals caused by a damaged proximity probe or loose wiring.\u003c\/p\u003e\n\u003cp\u003eQ: How are calibration adjustments performed on the transmitter in the field?\u003c\/p\u003e\n\u003cp\u003eA: Zero and span potentiometers are accessible under the front label, allowing field technicians to calibrate the loop current output directly using the integrated Test Input Pin for verification.\u003c\/p\u003e\n\u003cp\u003eQ: Does the transmitter require a separate external Proximitor Sensor unit?\u003c\/p\u003e\n\u003cp\u003eA: No, the transmitter features an integrated Proximitor Sensor circuit inside a single potted module housing, eliminating the need for an external signal conditioner.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the module onto a clean 35 mm DIN rail, confirming secure clip engagement against panel vibration.\u003c\/li\u003e\n\u003cli\u003eConnect the 3300 NSv extension cable to the input connector, ensuring a tight coaxial connection.\u003c\/li\u003e\n\u003cli\u003eMeasure static DC voltage at the PROX OUT and COM terminals using a calibrated multimeter, adjusting physical probe depth to achieve the -10 VDC gap voltage target.\u003c\/li\u003e\n\u003cli\u003eWire the 4-20 mA current loop terminals to the control system analog input card using shielded twisted-pair conductors.\u003c\/li\u003e\n\u003cli\u003eGround the cable shield at a single point on the main enclosure instrument bus bar to prevent ground loops and electromagnetic interference.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":43825036591194,"sku":"990-04-50-01-CN","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/990-05-70-01-011_c40f1447-d806-45d3-8a63-a20f8520bb19.png?v=1786435410","url":"https:\/\/www.spareoil.com\/products\/990-04-50-01-cn-990-2-wire-vibration-transmitter-bently-nevada","provider":"SpareOil Automation","version":"1.0","type":"link"}