3500/42M 128229-01 Proximitor® Monitor Module

Description

Product Detail: BENTLY NEVADA 3500/42M 128229-01 Proximitor® Monitor Module

Overview

The BENTLY NEVADA 3500/42M 128229-01 is a critical 4-channel monitor module designed for the renowned 3500 Machinery Protection System. This module is specifically engineered to condition and monitor signals from eddy-current proximity probes (e.g., Bently Nevada’s Proximitor® sensors) to measure relative shaft vibration and axial position (thrust) in rotating machinery. It serves as a fundamental component for predictive maintenance and machinery protection, enabling the early detection of developing faults in turbines, compressors, pumps, and other critical assets to prevent catastrophic failure and unplanned downtime.

Key Features & Benefits

• Four-Channel Monitoring: Provides a high-density solution for monitoring up to four independent vibration or position channels from a single slot in the 3500 rack, optimizing space and cost-efficiency.

• Comprehensive Signal Conditioning: Performs all necessary signal conditioning for eddy-current probes, including providing the required -24 Vdc power to the proximitor (Power-to-Sensor), and demodulating the raw RF signal into precise DC gap voltage and AC vibration signals.

• Dual-Level Alert Protection: Each channel provides two independently configurable alarm setpoints (Alert and Danger/Danger-Per-Miss) to enable early warning of abnormal conditions and initiate a protective shutdown if conditions become critical.

• Advanced Diagnostics: Continuously monitors the health of the sensor and its cabling system. Provides dedicated alarms for sensor faults such as open coils, shorted coils, and non-linear operation, ensuring measurement integrity.

• TDI (Tracked Dwell Index) & API (American Petroleum Institute) Compliance: The module can be configured to provide Keyphasor®-based filtered waveforms and computed values required for API 670 compliance and advanced diagnostic purposes.

• Seamless System Integration: Fully integrates with the 3500 framework, sharing data with other modules (e.g., a 3500/15 Power Supply and 3500/20 Frame Interface Module) and relaying alarm statuses to the central control system for operator awareness and automated shutdown sequences.

Technical Specifications

Parameter Description / Specification

Manufacturer Part Number 3500/42M 128229-01

OEM Manufacturer Bently Nevada (A Baker Hughes Business)

Product Type 4-Channel Relative Vibration / Axial Position Monitor

Compatible System Bently Nevada 3500 Machinery Protection System Rack

Number of Channels 4

128229-01

Input Type Accepts signals from Eddy-Current Proximity Probes (Requires -24 Vdc Power-to-Sensor)

Measured Parameters Relative Shaft Vibration (Peak-to-Peak in mils or µm), Axial Position (DC Gap in mils or mm)

Alarm Setpoints Two per channel (Alert, Danger). Independently configurable.

Sensor Power -24 Vdc Power-to-Sensor, short-circuit protected

Fault Diagnostics Probe Open, Probe Shorted, Non-Probe, Bad Probe, System Fault

Communication Integrates via the 3500 backplane with the Frame Interface Module for relay and serial output.

Certifications Designed to meet API 670 standards for machinery protection systems.

Typical Applications

This module is essential for protecting and monitoring high-value rotating equipment across various industries:
• Oil & Gas: Gas turbines, centrifugal compressors, steam turbines, axial compressors.

• Power Generation: Gas turbines, steam turbines, generators, large boiler feed pumps.

• Chemical & Petrochemical: Critical compressors and turbines in continuous process plants.

• Marine Propulsion: Main propulsion turbines and gearboxes on naval and commercial vessels.

• Water & Wastewater: Large pump trains and critical motors.

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