Description

Bently Nevada 3500/50‑01‑RU Tachometer Module

Technical Specifications

• Product Model: 3500/50‑01‑RU
• Brand: Bently Nevada
• Warranty: One Year
• Input Voltage: 5 V DC backplane supply from 3500 rack
• Operating Temperature: 0 °C ~ +60 °C
• Storage Temperature: ‑40 °C ~ +85 °C
• Response Time: Speed update rate 10 ms
• Protection Class: IP20 plug‑in rack‑monitoring module
• Accuracy Class: ±1 RPM speed‑measurement grade
• Output Frequency: 1‑20000 Hz input frequency range
• Rated Current: 610 mA @5 V DC; power consumption 3.05 W
• Input Channels: 2 independent tachometer input channels
• Supported Sensors: Proximity probe, magnetic pickup tachometer sensors
• Output: Speed value upload to 3500 system rack; relay alarm output for overspeed condition
• Diagnostics: Sensor open‑circuit, short‑circuit, signal‑amplitude fault detection, module self‑test
• Indicators: Module OK, channel fault LED indicators
• System Compatibility: Bently Nevada 3500 machinery‑monitoring rack system
• Certifications: CE, UL/cUL
• Humidity: 5‑95 % RH, non‑condensing
• Weight: 0.48 kg
• Dimensions: 222 × 102 × 28 mm
• 

Product Overview

3500/50‑01‑RU is tachometer speed‑monitoring module for Bently Nevada 3500 machinery‑protection system. It acquires pulse signals from tachometer sensors and calculates real‑time rotational speed for turbines, compressors and large rotating machinery. Two independent input channels support dual‑sensor overspeed‑monitoring configuration. It provides overspeed alarm and trip logic for machinery‑protection interlock. Comprehensive channel‑level diagnostics detect sensor‑wiring failures in time. OEM production discontinued; available as refurbished / new‑old‑stock spare parts for petrochemical‑plant rotating‑equipment‑monitoring‑system maintenance.

Application Notes

‑ Must be installed inside Bently Nevada 3500 series rack chassis. ‑ Configure pulse‑per‑turn parameter according to actual tachometer gear. ‑ Observe ESD anti‑static handling rules during module replacement. ‑ Typical deployment: refineries, power‑plants, chemical‑plants turbine‑compressor machinery‑protection‑system spare‑part stocking.