Product Overview

• PN: 3500/42M, Part No: 176449-02
• Brand: Bently Nevada (Baker Hughes)
• Series: 3500 Turbomachinery Protection TSI System
• Type: Multi-Function 4-Channel Monitoring Front Module

• Function: Core signal acquisition unit of 3500 rack system. It supplies excitation power to 3300XL eddy current probes, processes signals from seismic velocity transducers and piezoelectric accelerometers. Each channel can be independently configured via official software to monitor radial vibration, thrust position, differential expansion, shaft eccentricity and absolute vibration. It outputs Alert/Danger hardwired trip signals and 4-20mA analog data, and uploads operating data to rack communication modules. Protection logic operates independently without being affected by rack communication faults

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Core Features

• Four fully programmable independent channels, mixed sensor types are allowed in one module
• 4 front-panel BNC test ports for on-site signal debugging without system power-off
• Comprehensive self-diagnosis to detect probe open circuit, short circuit and wiring failures
• LED indicators display module running status and channel alarm information
• Hot-swappable under dual redundant power supply configuration
• High-precision signal filtering and mathematical integration for velocity/acceleration conversion
• Complies with API 670 industry standard, passes SIL2 safety certification

• Matches dedicated rear I/O terminal board for field wiring termination

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Technical Specifications

• Typical Power Consumption: 7.7 W
• Operating Temperature: -40℃ ~ +85℃
• Overall Dimension: 241.3 × 24.4 × 241.8 mm
• Net Weight: 0.91 kg
• HS Code: 8538900000
• Certifications: CE, UL, SIL2

• Product Status: OEM discontinued production; brand new original sealed and fully inspected refurbished modules available

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Compatibility

• Matching Rear I/O Module: Standard dedicated rear terminal board for 3500/42M
• Applicable Chassis: All 3500/05 12-slot and 14-slot rack frames
• Supported Sensors: 3300XL proximity probes, 9200 series velocity sensors, ICP accelerometers
• Compatible Software: 3500 rack configuration tool, Bently Nevada System 1 predictive maintenance platform

• Incompatible Usage: Cannot be matched with intrinsic safety rear I/O boards for 3500/44M

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Application

• Rotor vibration, thrust displacement and differential expansion safety interlock protection for steam turbines, gas turbines and centrifugal compressors in power and petrochemical industries
• Online condition monitoring and fault early warning for critical large rotating equipment
• Spare replacement and system renovation upgrade for legacy 3500 series TSI monitoring racks