{"product_id":"bently-nevada-990-04-50-01-01-2-wire-vibration-transmitter","title":"Bently Nevada 990-04-50-01-01 2-Wire Vibration Transmitter","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e990-04-50-01-01\u003c\/strong\u003e is a compact 2-wire vibration transmitter designed for direct integration of shaft vibration signals into industrial control systems. It converts proximity probe displacement into a linear 4 to 20 mA output, allowing PLC and DCS systems to perform continuous vibration trending and basic protection logic.\u003c\/p\u003e\n\u003cp\u003eThis version is typically selected when CSA Division 2 compliance is required alongside a standard DIN rail installation format. In practical engineering use, it is deployed on rotating equipment where vibration monitoring needs to be reliable but not dependent on a full rack-based monitoring system.\u003c\/p\u003e\n\u003cp\u003eThe transmitter works with a 3300 NSv proximity probe system and supports a 5.0 metre system length configuration. From a field perspective, this makes it suitable for medium-distance probe routing inside compressor skids, pump bases, and packaged machinery panels.\u003c\/p\u003e\n\u003cp\u003eOnce installed, the device is usually left to operate continuously with minimal intervention, provided probe alignment and loop power stability are correctly configured during commissioning.\u003c\/p\u003e\n\u003ch3\u003eFunctional Overview\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConverts shaft vibration signal into 4–20 mA analog output\u003c\/li\u003e\n\u003cli\u003eDesigned for 3300 NSv proximity probe systems\u003c\/li\u003e\n\u003cli\u003eCSA Division 2 approved configuration\u003c\/li\u003e\n\u003cli\u003e2-wire loop-powered architecture\u003c\/li\u003e\n\u003cli\u003eDIN rail mounting using 35 mm clips\u003c\/li\u003e\n\u003cli\u003eIntegrated signal conditioning electronics\u003c\/li\u003e\n\u003cli\u003eExternal zero and span adjustment capability\u003c\/li\u003e\n\u003cli\u003ePROX OUT diagnostic access point\u003c\/li\u003e\n\u003cli\u003eFault detection with output current drop behavior\u003c\/li\u003e\n\u003cli\u003eCompact sealed industrial housing design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical Application Context\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eEquipment Type\u003c\/th\u003e\n\u003cth\u003ePractical Use Case\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentrifugal compressors\u003c\/td\u003e\n\u003ctd\u003eContinuous vibration trending\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndustrial pumps\u003c\/td\u003e\n\u003ctd\u003eBearing condition monitoring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFans and blowers\u003c\/td\u003e\n\u003ctd\u003eUnbalance detection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM skid packages\u003c\/td\u003e\n\u003ctd\u003eEmbedded protection loop\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUtility auxiliaries\u003c\/td\u003e\n\u003ctd\u003eAlarm input to PLC systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcess machinery\u003c\/td\u003e\n\u003ctd\u003eBasic condition monitoring point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eOrdering Structure\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eCode Description\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 Vibration Transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-scale Option\u003c\/td\u003e\n\u003ctd\u003e-04 = 0-4 mils pp (0-100 µm pp)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Length Option\u003c\/td\u003e\n\u003ctd\u003e-50 = 5.0 metres (16.4 feet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Option\u003c\/td\u003e\n\u003ctd\u003e-01 = 35 mm DIN rail clips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAgency Approval Option\u003c\/td\u003e\n\u003ctd\u003e-01 = CSA Division 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eMechanical Data\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eItem\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e990-04-50-01-01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eVibration Transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eNew \u0026amp; Original in Factory Packing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFactory Warranty\u003c\/td\u003e\n\u003ctd\u003e12 Months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Target Size\u003c\/td\u003e\n\u003ctd\u003e9.5 mm (0.375 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (H x W x D)\u003c\/td\u003e\n\u003ctd\u003e53.3 mm x 73.9 mm x 100.1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Height (without DIN clip)\u003c\/td\u003e\n\u003ctd\u003e42.6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Hole Distance\u003c\/td\u003e\n\u003ctd\u003e63.5 mm x 69.9 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e5.8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitter Weight\u003c\/td\u003e\n\u003ctd\u003e0.43 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal System Weight\u003c\/td\u003e\n\u003ctd\u003e0.82 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInterface Overview\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eInterface\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProbe Input\u003c\/td\u003e\n\u003ctd\u003e3300 NSv proximity probe connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4–20 mA Output\u003c\/td\u003e\n\u003ctd\u003eVibration signal to control system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Input\u003c\/td\u003e\n\u003ctd\u003eLoop-powered DC supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePROX OUT\u003c\/td\u003e\n\u003ctd\u003eRaw vibration diagnostic signal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOM\u003c\/td\u003e\n\u003ctd\u003eSignal reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Notes (Engineering Practice)\u003c\/h3\u003e\n\u003cp\u003eIn typical installations, this transmitter is mounted on a DIN rail inside a control cabinet close to the PLC I\/O system. The key engineering focus is not the transmitter itself, but stable probe wiring and correct grounding practice.\u003c\/p\u003e\n\u003cp\u003eCable routing should avoid parallel runs with inverter output cables or motor feeders, especially in compressor skid environments where electromagnetic noise is common. Proper shielding termination is critical for signal stability.\u003c\/p\u003e\n\u003cp\u003eDuring commissioning, loop current should be verified before enabling any alarm logic. Engineers usually confirm stable vibration readings under steady-state machine conditions before integrating the signal into shutdown or warning systems.\u003c\/p\u003e\n\u003cp\u003eCSA Division 2 certification makes this configuration suitable for specific hazardous locations, depending on final system design and enclosure compliance.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the main function of this transmitter?\u003c\/strong\u003e\u003cbr\u003eIt converts vibration from a proximity probe into a 4–20 mA signal for control systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich probe system is required?\u003c\/strong\u003e\u003cbr\u003eIt is designed for Bently Nevada 3300 NSv proximity probe systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat makes this version different?\u003c\/strong\u003e\u003cbr\u003eIt includes CSA Division 2 certification for hazardous area applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be used directly with PLCs?\u003c\/strong\u003e\u003cbr\u003eYes, it outputs a standard analog signal compatible with PLC input modules.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a diagnostic system?\u003c\/strong\u003e\u003cbr\u003eNo, it is intended for basic vibration trending and protection logic.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is PROX OUT used for?\u003c\/strong\u003e\u003cbr\u003eIt provides access to raw vibration signals for maintenance diagnostics.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs DIN rail mounting mandatory?\u003c\/strong\u003e\u003cbr\u003eNo, but it is the standard and recommended installation method.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the operating principle?\u003c\/strong\u003e\u003cbr\u003eIt converts displacement measurement into proportional current output.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere is it typically installed?\u003c\/strong\u003e\u003cbr\u003eInside control cabinets for compressors, pumps, and rotating machinery.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it require external signal conditioning?\u003c\/strong\u003e\u003cbr\u003eNo, signal conditioning is fully integrated into the unit.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52666563592555,"sku":"990-04-50-01-01","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/bently-nevada-990-04-50-01-01-vibration-transmitter-mtt1xuabzyx_e5d68ee9-4136-4777-bac2-a1f09db3a28e.jpg?v=1765440700","url":"https:\/\/www.plcprotech.com\/products\/bently-nevada-990-04-50-01-01-2-wire-vibration-transmitter","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}