4-channel intrinsically safe certified monitoring front card with built-in isolation barrier, compatible with proximity, velocity and acceleration sensors for hazardous area installation, paired with dedicated rear I/O termination board for 3500 TSI machinery protection system, fully tested surplus spare parts

Product Overview

• PN: 3500/44M, Part No: 140734-03
• Brand: Bently Nevada (Baker Hughes)
• Series: 3500 Machinery Protection TSI System
• Type: Intrinsically Safe Barrier Integrated Monitor Module

• Function: Upgraded explosion-proof version of 3500/42M monitor module, integrating intrinsic safety isolation barrier circuit directly on the front board without extra external barrier modules. It accepts signals from 3300XL eddy current probes, Velomitor velocity transducers and ICP accelerometers, supports paired channel configuration to measure radial vibration, axial thrust displacement, differential expansion and shaft eccentricity. It generates two-stage Alert and Danger alarm signals, outputs 4-20mA analog measurement values, and realizes safe signal isolation between hazardous field zones and safe control cabinet area, complying with explosion-proof standards for petrochemical and offshore dangerous working environments.

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Core Features

1. Built-in certified intrinsic safety isolation barrier, eliminating separate external galvanic isolators to simplify cabinet wiring and save rack space
2. Four independent programmable input channels, channel grouping design supports two different measurement tasks on one single module
3. Front panel BNC buffered signal test ports for on-site waveform inspection and signal troubleshooting without system shutdown
4. Comprehensive self-diagnosis function to detect sensor open circuit, short circuit, line fault and module communication abnormalities automatically
5. Hot-swappable rack installation design; LED indicators clearly display power supply, running status and per-channel alarm trigger conditions
6. Configurable Modbus register addresses via official rack software for seamless data interconnection with DCS and PLC control systems

7. Strictly conforms to international intrinsic safety standards, applicable to Zone 0/1 hazardous explosive gas environments

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Technical Specifications

• Input Channels: 4 multi-type sensor input channels
• Supported Transducers: Eddy current proximity probe, velocity transducer, piezoelectric accelerometer
• Typical Power Consumption: 7.7W
• Measurement Accuracy: ≤ ±0.5% full scale range
• Operating Temperature: -40℃ ~ +70℃
• Net Weight: 0.85kg
• HS Code: 8538900000
• Certifications: CE, Intrinsic Safety Ex Certification, SIL2

• Product Status: Discontinued original production, brand new original and fully tested refurbished spare parts available

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Compatibility

• Mandatory Matched Rear I/O Module: Exclusive dedicated rear termination card for 3500/44M intrinsically safe version
• Applicable Rack: All standard 3500/05 series 12-slot and 14-slot monitoring chassis
• Supporting Software: 3500 rack configuration software, System 1 equipment condition monitoring diagnostic platform

• Incompatible Items: Ordinary 3500/40M / 3500/42M non-barrier monitor rear boards, third-party non-3500 series rack chassis

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Application

1. Vibration and displacement safety monitoring for steam turbines, gas turbines and compressors in petrochemical refineries, offshore platforms and chemical plants with hazardous explosion risk
2. Intrinsically safe signal acquisition between field explosive areas and central control room monitoring rack
3. System renovation and spare replacement of legacy 3500 TSI protection systems requiring explosion-proof intrinsic safety certification