{"product_id":"bently-nevada-991-25-50-02-00-industrial-automation-module","title":"Bently Nevada 991-25-50-02-00 Industrial Automation Module","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Bently Nevada 991-25-50-02-00 is a Probe Vibration Transmitter designed for axial thrust measurement in rotating machinery. Part of the trusted 991 series, this Thrust Transmitter converts proximity probe signals into a linear 4-20 mA output, enabling continuous monitoring of shaft position. Ideal for replacing older analog systems, the 991-25-50-02-00 delivers reliable performance in harsh industrial environments, supporting predictive maintenance and reducing unplanned downtime.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eThe 991-25-50-02-00 offers precise measurement capabilities with the following key parameters:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e +12 to +35 Vdc at the transmitter terminal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Signal:\u003c\/strong\u003e 4-20 mA, 2-wire configurable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoop Accuracy:\u003c\/strong\u003e ±1.5% of full scale (typical)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLinear Range:\u003c\/strong\u003e 0.25 to 1.65 mm (Prox Out); supports 0.6-0-0.6 mm or 25-0-25 mils current loop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Loop Resistance:\u003c\/strong\u003e 1,000 Ω 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\u003eOperating Temperature:\u003c\/strong\u003e -35°C to +85°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e -51°C to +100°C\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\u003cp\u003eThis transmitter accepts one non-contacting 3300 NSv proximity probe and extension cable, with non-interacting zero and span adjustments for easy calibration.\u003c\/p\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThe Bently Nevada 991-25-50-02-00 is primarily used in steam turbines, compressors, and large rotating equipment to monitor axial shaft position. Typical applications include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Generation:\u003c\/strong\u003e Monitoring turbine thrust bearings to prevent catastrophic failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil \u0026amp; Gas:\u003c\/strong\u003e Protecting centrifugal compressors from axial displacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Machinery:\u003c\/strong\u003e Providing continuous feedback for process control systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWith its fast Not OK\/Signal Defeat response (less than 3.6 mA within 100 µs), the 991-25-50-02-00 enhances safety by quickly signaling fault conditions.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eMount the 991-25-50-02-00 on a DIN rail using the bulkhead screws provided (Mounting Option 02). The system length is 5.0 meters (16.4 feet) – ensure proper cable routing. Connect the 3300 NSv probe and extension cable to the input. Wire the 4-20 mA loop to the control system, observing polarity. Set zero and span via external potentiometers. Verify loop resistance does not exceed 1,000 Ω at 35 Vdc. Use a 250 Ω resistor for accuracy verification.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eThe 991-25-50-02-00 requires minimal maintenance. Periodically check for cable damage and connector integrity. Clean the probe face if oil or debris accumulation is possible. The wide operating temperature range (-35°C to +85°C) ensures reliability in extreme conditions. Regular calibration checks (annually recommended) maintain ±1.5% accuracy. Storing the unit within -51°C to +100°C when not in use extends service life.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing the Bently Nevada 991-25-50-02-00, verify your system requirements: the full-scale option (-25 = 25-0-25 mils) and system length (-50 = 5.0 meters) match your application. Ensure compatibility with existing 3300 NSv probes and control systems that accept 4-20 mA inputs. For technical support and fast delivery, source from trusted suppliers like \u003cstrong\u003ePLC Source PRO\u003c\/strong\u003e (available at ubest101.myshopify.com). Our team can confirm part variants and provide documentation.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default","offer_id":44416853999715,"sku":"991-25-50-02-00","price":267.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/www.plcsourcepro.com\/products\/bently-nevada-991-25-50-02-00-industrial-automation-module","provider":"PLC Source PRO","version":"1.0","type":"link"}