3500/50M Benlty Navada Module Parts Tachometer Module for machinery protection

Product Summary
Bently Nevada 3500/50M Tachometer Module offers reliable 2-channel speed monitoring for turbines, compressors, and pumps. Features 12V DC, 1.5A, -20°C to 70°C range, reverse-rotation detection, and Keyphasor output. USA-made, part of the trusted 3500 Machinery Protection System.
Product Description
Product Overview

The Bently Nevada 3500/50M is a tachometer module designed for machinery protection and condition monitoring applications. It is part of the Bently Nevada 3500 Machinery Protection System and is used to measure shaft speed, detect rotational speed changes, and provide speed-related signals for machinery monitoring.

It is commonly used in industrial equipment such as turbines, compressors, pumps, and other rotating machinery where reliable speed monitoring is important for safe and stable operation.

Technical Specifications
Parameter Specification
Manufacturer Bently Nevada
Model 3500/50M
Product type Tachometer Module
Product family 3500 Machinery Protection System
Number of channels 2
Input sensors Proximity probes or magnetic pickups
Input signal range +10.0 V to −24.0 V
Input impedance 20 kΩ standard; 40 kΩ TMR; 7.15 kΩ internal barrier
Typical power consumption 5.8 W
Maximum input frequency Up to 20 kHz
Maximum full-scale speed Up to 99,999 rpm
Recorder output 4–20 mA
Buffered transducer output impedance 550 Ω
Configuration software 3500 Rack Configuration Software
Installation Compatible 3500 system rack
Bently Nevada 3500/50M Tachometer Module front view showing connectors and labeling
Main Functions
  • Shaft rotational speed measurement
  • Rotor acceleration monitoring
  • Zero-speed detection
  • Reverse-rotation detection
  • Programmable speed and alarm setpoints
  • Peak-speed and reverse-rotation history
  • Conditioned Keyphasor signal output for compatible 3500 rack monitors
Product Page Information

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Bently Nevada 3500/50M Tachometer Module installed in a 3500 system rack
Frequently Asked Questions
What is the Bently Nevada 3500/50M used for?

The 3500/50M is used to monitor shaft speed, rotor acceleration, zero speed, and reverse rotation in industrial rotating machinery.

How many channels does the 3500/50M have?

It has two channels and accepts signals from compatible proximity probes or magnetic pickups.

Which system does the 3500/50M belong to?

It belongs to the Bently Nevada 3500 Machinery Protection System.

What software is used to configure the 3500/50M?

The module is configured using 3500 Rack Configuration Software, which allows users to set up monitoring functions and alarm parameters.

Does the 3500/50M support reverse-rotation detection?

Yes. It can be configured to detect reverse rotation and provide corresponding notifications.

Can the 3500/50M provide a Keyphasor signal?

Yes. It can provide conditioned Keyphasor signals to the 3500 rack backplane for use by compatible monitoring modules.

Product Details
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Benlty Navada tachometer module

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3500/50M machinery protection module

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Benlty Navada module parts

Countryoforigin: USA
Category: Module Parts
Dimensions: 150mm X 100mm X 50mm
Operatingtemperaturerange: -20°C To 70°C
Current: 1.5A
Voltage: 12V DC

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