Description

Bently Nevada 396571‑02‑6 Proximitor Sensor Interface Module

Technical Specifications

• Product Model: 396571‑02‑6
• Brand: Bently Nevada (Baker Hughes)
• Warranty: One Year
• Input Voltage: 24 VDC (18‑30 VDC), rack‑backplane powered
• Operating Temperature: 0 °C ~ +60 °C rack‑mount
• Storage Temperature: ‑40 °C ~ +85 °C
• Response Time: Dynamic signal response bandwidth 10 Hz‑10 kHz
• Protection Class: IP20, cabinet‑only indoor installation
• Accuracy Class: Proximity measurement ±1.5 % full‑scale
• Output Frequency: Supports rotating‑machine fundamental frequency 10‑15 000 RPM
• Rated Current: 220 mA @24 VDC typical module consumption
• Sensor Compatibility: 3300‑XL series eddy‑current proximity probe systems
• Signal Interfaces: Probe driver signal input; buffered gap voltage output; alarm relay outputs
• Diagnostics: Probe open‑circuit, short‑circuit self‑diagnostics; front‑panel LED fault indicators
• Galvanic Isolation: Field‑sensor side vs system backplane 1000 VAC isolation rating
• Mounting: Standard Bently Nevada 3500‑series rack slot form‑factor
• Dimensions / Weight: 225 mm × 170 mm × 28 mm; approx 0.61 kg
• 

Product Overview

The 396571‑02‑6 is a proximitor interface monitoring module for Bently Nevada 3500 machinery protection platform. It supplies excitation power and signal conditioning for eddy‑current proximity probes, measuring shaft radial vibration and rotor gap displacement for rotating equipment. It converts probe raw eddy‑current signals into usable gap‑voltage values, generates buffered monitoring outputs for host system, and executes self‑check diagnostics to detect probe cable breakage and short‑circuit failures. Comprehensive fault status is transmitted to the main 3500 rack controller for machinery alarm and trip logic, delivering stable performance in heavy‑EMI power‑plant, oil‑gas and petrochemical cabinet environments.

This monitoring module addresses rotating‑machinery protection challenges: high‑reliability eddy‑current probe signal conditioning, built‑in sensor‑fault diagnostics, robust galvanic isolation, drop‑in spare‑part compatibility for legacy 3500‑series retrofit‑maintenance projects. Machinery‑protection engineers, power‑plant and refinery maintenance technicians and retrofit integrators benefit most. Typical applications: gas‑turbine, steam‑turbine, centrifugal‑pump and compressor shaft‑vibration monitoring cabinets.