{"product_id":"bently-nevada-990-04-50-03-00-vibration-transmitter-module","title":"Bently Nevada 990-04-50-03-00 Vibration Transmitter Module","description":"\u003ch2\u003eProduct Introduction\u003c\/h2\u003e\u003cp\u003eWhen a vibration monitoring system fails or provides unreliable readings, the \u003cstrong\u003eBently Nevada 990-04-50-03-00\u003c\/strong\u003e 990 Vibration Transmitter delivers precise displacement measurements. This module accepts one non-contacting 3300 NSv proximity probe and extension cable, converting probe signals into a 4-20 mA output. Its full-scale option of 0-4 mils pp (0-100 μm pp) makes it ideal for critical machinery protection.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications Breakdown\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eBently Nevada 990-04-50-03-00\u003c\/strong\u003e offers key specs that ensure reliable vibration monitoring:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e +12 to +35 Vdc input at the transmitter terminal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Signal:\u003c\/strong\u003e 4-20 mAdc over specified full-scale range, 2-wire configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoop Accuracy:\u003c\/strong\u003e Within ±1.5% over full-scale range (measured from TEST signal to 250 Ω load).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 5 Hz to 6,000 Hz +0, -3 dB.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Loop Resistance:\u003c\/strong\u003e 1,000 Ω including cable at 35 Vdc.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Limiting:\u003c\/strong\u003e 23 mA typical.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.43 kg (0.9 lbm).\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplication Scenarios\u003c\/h2\u003e\u003cp\u003eIn power generation, petrochemical, and heavy machinery environments, the \u003cstrong\u003eBently Nevada 990-04-50-03-00\u003c\/strong\u003e excels at monitoring shaft relative vibration. For example, on a steam turbine, the 990-04-50-03-00 provides continuous 4-20 mA output to a DCS or PLC. Its fast NOT OK response (signal drops below 3.6 mA within 100 µs) immediately alerts operators to probe faults, preventing catastrophic damage.\u003c\/p\u003e\u003ch2\u003eTroubleshooting \u0026amp; Common Issues\u003c\/h2\u003e\u003cp\u003eA common problem in vibration monitoring is false readings due to improper probe gap. The \u003cstrong\u003eBently Nevada 990-04-50-03-00\u003c\/strong\u003e requires a probe gap between 0.5 and 1.75 mm (20-55 mils). If the gap is out of range, the transmitter may not achieve full scale. Another issue is loop resistance exceeding 1,000 Ω, which can degrade accuracy. Use the maximum loop resistance spec to verify cable length. The built-in NOT OK\/signal defeat feature ensures the output goes to less than 3.6 mA within 100 µs of a fault, and restores 2-3 seconds after removal.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eWith non-interacting external zero and span adjustments, the \u003cstrong\u003eBently Nevada 990-04-50-03-00\u003c\/strong\u003e simplifies calibration. No periodic recalibration is required under normal conditions, but verify probe gap during installation. The transmitter can be mounted using DIN clips and screws (mounting option 03). Its compact 0.43 kg design fits easily into existing cabinets. The NOT OK signal defeat feature ensures system integrity during probe or cable faults.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing, verify that your system uses a 3300 NSv proximity probe and that the cable length does not exceed 3 meters (10 feet) for the Proximitor Sensor Output (BNC connector). Ensure supply voltage between 12 and 35 Vdc. For non-hazardous, Zone 2, or Div 2 locations, the \u003cstrong\u003eBently Nevada 990-04-50-03-00\u003c\/strong\u003e is suitable. As a trusted supplier, \u003cstrong\u003ePLC Source PRO\u003c\/strong\u003e (available at ubest101) stocks this module with fast shipping. Check system length option (5.0 meters in this configuration) and mounting option (DIN clips\/screws) to match your setup.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default","offer_id":44416538116195,"sku":"990-04-50-03-00","price":214.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/www.plcsourcepro.com\/products\/bently-nevada-990-04-50-03-00-vibration-transmitter-module","provider":"PLC Source PRO","version":"1.0","type":"link"}