Bently Nevada 330980-71-CN 3300 XL NSv Proximitor Sensor

Description

The 330980-71-CN is a high-performance eddy-current proximity pre-amplifier designed to operate as the core signal processing component within the 3300 XL NSv Proximity Transducer System. This driver module is engineered to convert the raw high-frequency radio frequency (RF) signal captured by an embedded proximity probe into a continuous, linear analog voltage output. With a nominal Average Scale Factor (ASF) of 7.87 V/mm (200 mV/mil), it delivers precise shaft displacement and dynamic vibration data to host machinery protection monitors, making it an essential component for the structural monitoring of high-speed centrifugal air compressors, refrigeration compressors, and process gas machinery with tight installation envelopes.

In terms of retrofitting and system lifecycle maintenance, the 330980-71-CN provides direct mechanical and electrical backward compatibility, allowing it to seamlessly replace legacy 3300 RAM transducer systems as well as 3000-series or 7000-series 190 transducer frameworks without requiring a complete teardown of existing field-routed probes or extension cables. This specific model represents a 7.0-meter total loop calibration profile configured for high-density 35 mm DIN rail mounting and features a specialized country-specific suffix for localized regulatory compliance. Enclosed in a rugged A380 die-cast aluminum housing and equipped with proprietary tool-free SpringLoc terminal blocks, the sensor provides enhanced immunity to industrial radio frequency interference (RFI) and electromagnetic noise (EMI) across complex industrial environments.

Features

• Optimized for small-target applications and restricted side-view envelopes, including narrow shafts down to 51 mm or flat surfaces down to 15 mm.
• Delivers a stable 1.5 mm (60 mils) linear measurement range starting approximately 0.25 mm from the connected probe tip face.
• Features integrated SpringLoc terminal strips that establish highly vibration-resistant electrical connections without the need for specialized installation tools.
• High-density DIN rail mount design providing superior RFI/EMI shielding to allow direct back-to-back installation inside crowded control cabinets.
• Rugged A380 aluminum housing construction offering exceptional structural integrity and an extremely low thermal expansion coefficient.

Applications

• High-density panel installations on standard 35 mm DIN rails for radial shaft vibration tracking on high-speed industrial turbo-machinery.
• Precision rotor axial thrust position offset and fluid-film bearing wear monitoring in compact process gas expanders.
• High-frequency phase reference tracking, tachometer speed measurements, and zero-speed sensor calibration via Keyphasor signal loops.

Ordering Information

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Total Loop Matching Rule: This Proximitor sensor is factory-calibrated for a total electrical loop length of exactly 7.0 meters. The combined physical lengths of the connected 3300 NSv probe and the 3300 NSv extension cable must equal 7.0 meters (e.g., a 0.5-meter probe paired with a 6.5-meter extension cable) to prevent severe scale factor calibration errors.
• DIN Rail Mounting Securement: When snapping the module onto a standard 35 mm DIN rail, ensure that the plastic spring-loaded release clip underneath completely engages. For multi-channel installations, maintain a slight physical air gap between adjacent modules to facilitate natural convection cooling.
• Terminal Wiring Wire Gauges: SpringLoc terminal blocks accommodate solid or stranded copper conductors ranging from 0.2 to 1.5 mm2 (16 to 24 AWG). If crimped wire ferrules are deployed, limit the maximum cross-sectional area to 0.75 mm2 (18 AWG) to ensure correct structural latching inside the clamp.
• Electrostatic Discharge Protection: Although the internal circuits are ruggedized against static voltage transients, field technicians must follow standard ESD precautions and ground themselves before managing coaxial terminations, wiring signal leads, or interacting with terminal blocks to avoid damaging sensitive input stages.

Compliance and Certifications

• EMC Directive: Complies with European Community Directive 2014/30/EU, meeting EN 61000-6-2 (Industrial Immunity) and EN 61000-6-4 (Industrial Emissions) standards.
• RoHS Directive: Conforms to European Directive 2011/65/EU.
• China RoHS: Provides an Environment-Friendly Use Period (EFUP) designation of 15 years, tested in accordance with SJ/T 11364-2024.
• Regional Compliance (-CN): Meets designated localized criteria for hazardous area installations within Mainland China jurisdictions.