{"product_id":"bently-nevada-990-04-50-01-00-transmitter-unit-fast-delivery","title":"Bently Nevada 990-04-50-01-00 Transmitter Unit - Fast Delivery","description":"\u003ch3\u003e\u003cb\u003eTransmitter Architecture and Core Overview\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #b91c1c;\"\u003e\u003cb\u003e990-04-50-01-00\u003c\/b\u003e\u003c\/span\u003e is an advanced industrial vibration transmitter manufactured by \u003cspan style=\"color: #b91c1c;\"\u003e\u003cb\u003eBently Nevada\u003c\/b\u003e\u003c\/span\u003e within the \u003cspan style=\"color: #b91c1c;\"\u003e\u003cb\u003e990\u003c\/b\u003e\u003c\/span\u003e series. Engineered to interface directly with non-contacting proximity probe systems, it converts raw vibration parameters into a standardized 4 to 20 mA loop-powered output. Its compact DIN-rail mount design streamlines installation in remote junction boxes and machinery control panels.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eModel Configuration Breakdown\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eConfiguration Parameter\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cb\u003eSelected Suffix Option \u0026amp; Description\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eBase Model \u0026amp; Type\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cb\u003e990\u003c\/b\u003e = 990 Vibration Transmitter Platform\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFull-Scale Range Option\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cb\u003e04\u003c\/b\u003e = 0 to 4 mils pp (0 to 100 micrometers pp) displacement scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSystem Length Option\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cb\u003e50\u003c\/b\u003e = 5.0 metres (16.4 feet) total system length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eMounting Hardware Option\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cb\u003e01\u003c\/b\u003e = 35 mm DIN rail mounting clips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eAgency Approval Option\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cb\u003e00\u003c\/b\u003e = Standard non-hazardous area configuration (not required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications \u0026amp; Performance Matrix\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003ePerformance Category\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cb\u003eEngineering Specification Detail\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eInput Sensor Compatibility\u003c\/b\u003e\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\u003e\u003cb\u003eLoop Power Supply Requirement\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e+12 to +35 Vdc input applied directly at terminal blocks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eCurrent Output \u0026amp; Accuracy\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e4 to 20 mAdc loop output; within plus-minus 1.5% loop accuracy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFrequency Response\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e5 Hz to 6,000 Hz (+0, -3 dB) bandwidth range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eMaximum Loop Resistance\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e1,000 ohms including cabling at 35 Vdc operating voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003ePhysical Weight\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e0.43 kg (0.9 lbm) net transmitter assembly weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003eInstallation and Mechanical Guidelines\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the unit securely onto a standard 35 mm industrial DIN rail inside a protective enclosure.\u003c\/li\u003e\n\u003cli\u003eEnsure the connected 3300 NSv proximity probe is statically gapped between 0.5 and 1.75 mm from the target.\u003c\/li\u003e\n\u003cli\u003eVerify that external loop resistance does not exceed 1,000 ohms at 35 Vdc supply voltage.\u003c\/li\u003e\n\u003cli\u003eConnect shield drain wires properly to prevent ground loops across long signal transmission runs.\u003c\/li\u003e\n\u003cli\u003eUse the non-interacting external zero and span potentiometers for precise field calibration adjustments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eDiagnostic Capabilities and Fault Detection\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe unit features built-in Not-OK signal defeat circuitry that automatically forces output current below 3.6 mA within 100 microseconds if a sensor fault or broken cable occurs. This rapid downscale behavior alerts control systems to probe failures instantly, preventing false trip commands while ensuring operators are notified of telemetry loss before machinery damage escalates.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eTarget Equipment and Application Scenarios\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSmall to Medium-Sized Industrial Centrifugal Pumps\u003c\/li\u003e\n\u003cli\u003eBalanced-Draft Fans and Blowers in Power Plants\u003c\/li\u003e\n\u003cli\u003eIndustrial Gearboxes and Auxiliary Compressor Trains\u003c\/li\u003e\n\u003cli\u003eCompact Steam Turbines and Motor-Driven Centrifuges\u003c\/li\u003e\n\u003cli\u003eBalance-of-Plant Skids requiring direct 4-20mA PLC integration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eComparative Selection Analysis\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eWhen selecting monitoring hardware for specialized machinery, engineers frequently compare displacement ranges and scale configurations. For an alternative configuration featuring an extended 0 to 8 mils pp full-scale range and a 7.0-meter system length with agency approvals, review the \u003ca href=\"https:\/\/www.plcsparehub.com\/products\/990-08-70-03-01-bently-nevada-990-vibration-transmitter\"\u003e\u003cb\u003e990-08-70-03-01\u003c\/b\u003e\u003c\/a\u003e model. While the subject model is calibrated for tight 0-4 mils vibration monitoring, the comparative unit accommodates higher vibration thresholds.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eInstrumentation engineers operating the \u003cspan style=\"color: #b91c1c;\"\u003e\u003cb\u003e990-04-50-01-00\u003c\/b\u003e\u003c\/span\u003e note that utilizing the front BNC connection for temporary test equipment hookups allows quick raw signal verification without breaking 4-20mA loop wiring. For example, connecting a portable spectrum analyzer to the BNC port during routine maintenance isolates mechanical unbalance from electrical noise instantly.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eLogistics, Fulfillment, and Warranty\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eExpedited order processing and dispatch within 24 to 48 hours of purchase confirmation.\u003c\/li\u003e\n\u003cli\u003eReliable international shipping channels coordinated via FedEx, UPS, and DHL.\u003c\/li\u003e\n\u003cli\u003ePackaged securely in heavy-duty industrial materials to prevent transit damage.\u003c\/li\u003e\n\u003cli\u003eFully backed by a comprehensive 12-month manufacturer replacement warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eBuying Guide and Engineering FAQ\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: What is the primary function of the Not-OK signal defeat feature?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: It drops the 4-20mA output below 3.6 mA during sensor faults to signal control systems that the vibration reading is invalid.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Why must the probe gap be maintained between 0.5 and 1.75 mm?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: This specific gap range guarantees linear electrical response across the full 0 to 4 mils pp measurement scale.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Can I connect this transmitter directly to standard PLC analog input cards?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes, the 2-wire 4-20mA loop output integrates seamlessly with any standard PLC or DCS analog input card.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: How does loop resistance affect maximum cable run distances?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Total loop resistance including wiring must remain under 1,000 ohms at 35 Vdc to maintain proper transmitter operating current.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: What type of proximity probe is required for this transmitter model?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: It requires a non-contacting Bently Nevada 3300 NSv Proximity Probe and matching extension cable system.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/990_Graphs_and_Figures_8ba4a14f-832f-4772-a484-c09fd48b12f9.png?v=1784875470\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":45013971599542,"sku":"990-04-50-01-00","price":203.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/BentlyNevada990_5_5ea3619a-d24f-414c-a100-cffa1ef66dfe.jpg?v=1788428188","url":"https:\/\/www.plcsparehub.com\/products\/bently-nevada-990-04-50-01-00-transmitter-unit-fast-delivery","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}