Product Overview

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

• Function: Standard upgraded monitoring card of 3500 series, with 4 independent configurable channels that can be grouped into two measurement groups via configuration software. It supplies power to 3300XL proximity probes and processes signals from seismic velocity transducers and ICP accelerometers, calculating radial vibration, thrust displacement, differential expansion, eccentricity and shaft absolute vibration. It triggers Alert and Danger alarm interlocks, outputs 4-20mA analog signals, and uploads data to rack communication modules. Hardwired trip protection works independently even if rack communication fails.

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Core Features

• Four fully programmable input channels, supports mixed sensor types in one module
• Front panel BNC test ports for on-site signal checking without system shutdown
• Comprehensive self-diagnosis to detect sensor open circuit, short circuit and line faults
• Hot-swappable under dual redundant rack power supply; LED status indication per channel
• High-precision signal filtering and integration for velocity/acceleration conversion
• Complies with API 670 machinery protection specification, SIL2 safety certification available

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

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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; brand new original sealed and fully inspected refurbished units in stock

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Compatibility

• Matching Rear I/O Module: Exclusive rear termination card for 3500/42M
• Applicable Chassis: All 3500/05 12-slot and 14-slot rack frames
• Supported Sensors: 3300XL eddy current probes, 9200 velocity sensors, piezoelectric accelerometers
• Compatible Upper Software: Official 3500 rack configuration software, System 1 diagnostic platform

• Incompatible: Cannot pair with 3500/44M intrinsic safety rear I/O boards

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Application

• Rotor vibration, thrust and expansion protection for steam turbines, gas turbines and centrifugal compressors in power and petrochemical industries
• Online condition monitoring of large rotating equipment for fault prediction and unit safety interlock
• Spare replacement and system retrofit for legacy 3500 series TSI monitoring racks