Product Overview

• PN: 3500/42-01-00
• Brand: Bently Nevada (Baker Hughes)
• Series: 3500 Turbomachinery Protection TSI System
• Type: Two Channel Proximitor Monitor Front Module

• Function: Classic dual-channel monitoring unit of the 3500 system, supplies excitation power to 3300XL eddy current probes and converts probe gap signals into measurable displacement values. It monitors shaft radial vibration and thrust bearing position, generates Alert and Danger alarm signals once readings exceed preset thresholds, outputs hardwired trip commands and 4-20mA analog signals, and uploads operating data to rack communication modules. Protection logic runs independently and will not fail due to upper communication disconnection.

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Core Features

• Two independent measuring channels exclusively designed for proximity probe signal processing
• Front panel reserved BNC test ports for signal inspection without shutting down the whole rack
• Built-in comprehensive self-check function to identify probe open circuit, short circuit and line faults
• Status indicator lights on panel display module operating state and channel alarm information
• Supports hot plug replacement under redundant power supply configuration
• Complies with API 670 industry standard for rotating machinery safety protection

• Needs matched dedicated rear I/O terminal board to complete field wiring connection

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Technical Specifications

• Typical Power Consumption: 7.5 W
• Operating Temperature: -40℃ ~ +85℃
• Overall Dimension: 241.3 × 24.4 × 241.8 mm
• Net Weight: 0.88 kg
• HS Code: 8538900000
• Certifications: CE, UL

• Product Status: Manufacturer discontinued; brand new original sealed and fully tested refurbished modules available

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Compatibility

• Matching Rear I/O Board: Special rear termination module tailored for 3500/42 series
• Applicable Chassis: All 3500/05 12-slot and 14-slot rack frames
• Supported Sensor: Full range 3300XL series non-contact eddy current proximity probes
• Compatible System Software: 3500 rack configuration software, System 1 equipment diagnosis platform

• Incompatible Range: Cannot access velocity sensors and temperature measurement signals directly

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Application

• Vibration and thrust position safety monitoring for steam turbines, gas turbines and compressors in power and petrochemical plants
• Online protection and interlock control for large generator sets and critical rotating equipment
• Spare replacement and equipment renovation for early version 3500 series monitoring cabinets