{"product_id":"bently-nevada-991-25-xx-01-cn-thrust-transmitter-991-series","title":"Bently Nevada 991-25-XX-01-CN Thrust Transmitter 991 Series","description":"\u003cp\u003eThe \u003cstrong\u003eBently Nevada 991-25-XX-01-CN\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e991\u003c\/strong\u003e Thrust Transmitter, operates as a dedicated hardware component for axial position signal conversion within machine monitoring systems.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Configuration\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e25: 25-0-25 mils measurement range.\u003c\/li\u003e\n\u003cli\u003eXX: System length options (50: 5.0 m, 70: 7.0 m).\u003c\/li\u003e\n\u003cli\u003e01: 35 mm DIN-rail mounting clips.\u003c\/li\u003e\n\u003cli\u003eCN: Country-specific regulatory configuration.\u003c\/li\u003e\n\u003c\/ul\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\u003e991-25-XX-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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.44 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e7.3 x 5 x 10 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-35 deg C to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e+12 to +35 VDC input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput\u003c\/td\u003e\n\u003ctd\u003e1 x 3300 NSv Proximity Probe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoop Resistance\u003c\/td\u003e\n\u003ctd\u003e1,000 Ohm max at 35 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eMechanical Monitoring and Eddy-Current Scaling\u003c\/h3\u003e\n\u003cp\u003eThe 991 transmitter performs signal processing for thrust position monitoring, interfacing directly with a 3300 NSv eddy-current probe. The unit manages the probe-to-target gap by maintaining appropriate eddy-current probe scaling to ensure linear output relative to shaft displacement. Field commissioning requires gap voltage validation to ensure the transmitter operates within its defined calibration window, typically centered at -10 VDC. The transmitter's design facilitates cross-talk suppression through optimized internal filtering, which prevents electrical noise coupling between neighboring probe channels in high-density rack environments.\u003c\/p\u003e\n\u003ch3\u003eOrdering info\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 991-25-XX-01-CN Thrust Transmitter\u003c\/li\u003e\n\u003cli\u003e1 x DIN-rail mounting kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMounting\n\u003cul\u003e\n\u003cli\u003eSecure the transmitter to a standard 35 mm DIN-rail in a climate-controlled enclosure.\u003c\/li\u003e\n\u003cli\u003eEnsure adequate clearance around the module for thermal dissipation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eElectrical Termination\n\u003cul\u003e\n\u003cli\u003eConnect the transmitter to a +12 VDC to +35 VDC loop power supply.\u003c\/li\u003e\n\u003cli\u003eUse shielded cable for the probe input to minimize EMI\/RFI interference.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eCalibration\n\u003cul\u003e\n\u003cli\u003eUtilize external zero and span potentiometers to calibrate the 4-20 mA output against the target mechanical displacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCan this transmitter be used with 8 mm standard probes?\u003c\/p\u003e\n\u003cp\u003eNo. The 991 series transmitter is designed exclusively for 3300 NSv proximity probes due to specific coil frequency matching requirements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the effect of exceeding the maximum loop resistance?\u003c\/p\u003e\n\u003cp\u003eExceeding 1,000 Ohm will cause the 4-20 mA current loop to saturate, resulting in inaccurate thrust readings and potential loop failure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs the zero and span adjustment non-interacting?\u003c\/p\u003e\n\u003cp\u003eYes. The external adjustment potentiometers are designed to be non-interacting, allowing for independent calibration of the measurement range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow does the transmitter handle current limiting?\u003c\/p\u003e\n\u003cp\u003eThe device features built-in current limiting, capping the output at 23 mA typical to protect the loop circuitry during fault conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan the transmitter be mounted in a hazardous area?\u003c\/p\u003e\n\u003cp\u003eThe unit must be installed in a suitable protective enclosure if the area classification requires it; verify your local regulatory compliance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow should the shield be grounded?\u003c\/p\u003e\n\u003cp\u003eThe probe shield should be grounded at the transmitter terminal block to provide a continuous path for noise and prevent ground loops.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the transmitter require a separate power supply for the probe?\u003c\/p\u003e\n\u003cp\u003eNo. The 991 transmitter provides the necessary excitation voltage to the 3300 NSv probe via the coaxial cable connection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens if the gap voltage is outside the linear range?\u003c\/p\u003e\n\u003cp\u003eThe transmitter output will deviate from the linear 4-20 mA scale, likely causing the monitoring system to trigger a \"Not OK\" or out-of-range alarm.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":46026768122029,"sku":"991-25-XX-01-CN","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/Bently991-001-xx-01-cn_1_5756b7a8-f77d-43ee-a416-36f89941f4db.jpg?v=1783784227","url":"https:\/\/www.maxwellplc.com\/ga\/products\/bently-nevada-991-25-xx-01-cn-thrust-transmitter-991-series","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}