{"product_id":"bently-nevada-991-25-70-01-00-industrial-automation-module","title":"Bently Nevada 991-25-70-01-00 Industrial Automation Module","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Bently Nevada 991-25-70-01-00 is a precision thrust transmitter designed for axial vibration monitoring in rotating machinery. This industrial automation module accepts a single 3300 NSv proximity probe and provides a 4-20 mA output proportional to shaft position. With a full-scale range of 25-0-25 mils and a system length of 7.0 meters, the 991-25-70-01-00 delivers reliable thrust measurement for turbine, compressor, and motor applications. Its fast \u003cstrong\u003eNot OK\/Signal Defeat\u003c\/strong\u003e feature ensures rapid fault detection, going below 3.6 mA within 100 µs of a fault condition.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eKey performance parameters of the Bently Nevada 991-25-70-01-00:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Signal:\u003c\/strong\u003e 4-20 mA, 2-wire configuration\u003c\/li\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\u003eLoop Accuracy:\u003c\/strong\u003e ±1.5% over specified full scale (typical)\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\u003eLinear Range:\u003c\/strong\u003e 0.25 to 1.65 mm for Prox Out; suitable for 0.6-0-0.6 mm or 25-0-25 mils current loop linear ranges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -35°C to +85°C (-31°F to +185°F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e -51°C to +100°C (-60°F to +212°F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.43 kg (0.9 lb)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e 35 mm DIN-rail clips\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eReal-World Applications\u003c\/h2\u003e\u003cp\u003eThe Bently Nevada 991-25-70-01-00 is ideal for axial position monitoring in steam turbines, centrifugal compressors, and large electric motors. In a typical turbine thrust bearing application, the transmitter detects minute shaft displacement and converts it to a linear 4-20 mA signal for PLC or DCS integration. Its rapid Not OK response protects against catastrophic bearing failure by alerting operators within microseconds of a fault condition. The 0.25 to 1.65 mm linear range ensures accurate measurements across the full operating envelope.\u003c\/p\u003e\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\u003cp\u003eMount the Bently Nevada 991-25-70-01-00 on a standard 35 mm DIN rail using the provided clips. Connect the 3300 NSv proximity probe and extension cable to the input terminals. Wire the 4-20 mA loop in a 2-wire configuration, ensuring the total loop resistance does not exceed 1,000 Ω at 35 Vdc. Power the transmitter with +12 to +35 Vdc at the terminal block. Adjust zero and span using the non-interacting external potentiometers after installation. Verify the output at the desired full-scale range (e.g., 25-0-25 mils).\u003c\/p\u003e\u003ch2\u003eMaintenance Tips\u003c\/h2\u003e\u003cp\u003eRegularly inspect the proximity probe and cable for physical damage or contamination. Clean the probe face with a soft cloth and isopropyl alcohol if required. Check the transmitter’s operating temperature stays within -35°C to +85°C. Periodically verify the 4-20 mA loop accuracy using a calibrated multimeter. The Not OK self-test can be triggered by simulating a fault to confirm the output drops below 3.6 mA within 100 µs. Recalibrate zero and span if the reading drifts beyond ±1.5%.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing the Bently Nevada 991-25-70-01-00, confirm your system length and full-scale range requirements. This model includes a 7.0-meter system length and 25-0-25 mils full-scale option. Ensure your control system accepts a 4-20 mA input with a maximum loop resistance of 1,000 Ω. For additional accessories or replacement units, contact \u003cstrong\u003eubest101\u003c\/strong\u003e for competitive pricing and fast delivery.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default","offer_id":44416886440035,"sku":"991-25-70-01-00","price":220.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/991-25-70-01-CN.jpg?v=1785255159","url":"https:\/\/www.plcsourcepro.com\/products\/bently-nevada-991-25-70-01-00-industrial-automation-module","provider":"PLC Source PRO","version":"1.0","type":"link"}