Product Overview

• PN: 3500/62
• Brand: Bently Nevada (Baker Hughes)
• Series: 3500 Turbomachinery Protection TSI System
• Type: Process Variable Monitoring Front Module

• Function: Dedicated analog process parameter acquisition unit of the 3500 rack system. It receives standard 4-20mA current or -10~+10VDC voltage signals from field transmitters, converts external process variables into digital data inside the module. Users configure upper/lower limit, high-high/low-low alarm thresholds via official software, the module outputs hardwired alarm trip signals and uploads real-time data to rack communication modules. It realizes linkage protection between process parameters and rotating machinery vibration/displacement monitoring, avoiding equipment damage caused by abnormal working conditions such as pressure surge and flow deviation

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Core Features

• Six fully independent configurable input channels, single module can collect six groups of process signals simultaneously
• Three optional rear I/O matching types: ±10VDC voltage terminal, isolated 4-20mA terminal, intrinsically safe barrier 4-20mA terminal for hazardous area use
• Each channel supports four-stage programmable alarm logic including low, high, low-low and high-high, with alarm delay and dead zone anti-jitter setting
• Supports TMR triple modular redundant installation with three adjacent cards to eliminate single-point failure risk and meet SIL2 safety certification requirements
• Built-in comprehensive self-diagnosis to detect signal loop open circuit, short circuit and wiring abnormal faults
• Front panel LED indicators display module running status and channel alarm trigger status
• Hot swappable under dual redundant rack power supply without shutting down the entire monitoring cabinet
• PCB conformal coating treatment, stable operation against damp, dust and electromagnetic interference in industrial control cabinets

• Works with 3500/42M vibration module and 3500/65 temperature module to build a full-dimensional equipment protection system

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Technical Specifications

• Typical Power Consumption: 7 W
• Supported Input Signals: 4~20mA DC, -10VDC ~ +10VDC
• Basic Measurement Accuracy: ±0.33% full scale typical value, maximum ±1% full scale
• Channel Isolation Voltage (isolated version): 500VDC between channels
• Operating Temperature: -40℃ ~ +85℃
• Overall Dimension: 241.3 × 24.4 × 241.8 mm
• Net Weight: 0.82 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 Boards: Corresponding dedicated rear termination card for voltage, isolated 4-20mA and intrinsically safe 4-20mA versions
• Applicable Chassis: All 3500/05 12-slot and 14-slot standard rack frames
• Compatible Software: 3500 rack configuration tool, Bently Nevada System 1 predictive maintenance platform
• External Matching Equipment: Pressure transmitters, flow transmitters, liquid level sensors and auxiliary temperature transmitters with standard analog output

• Incompatible Usage: Cannot directly access eddy current probe, velocity sensor and thermocouple raw signals without signal conversion equipment

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Application

• Pressure, inlet flow, lubricating oil pressure and liquid level monitoring for steam turbines, gas turbines and centrifugal compressors in power and petrochemical industries
• Auxiliary process parameter interlock protection for large rotating equipment to prevent unit trip or mechanical failure caused by process medium abnormality
• Signal centralized acquisition for multiple analog transmitters on site, reducing DCS system point occupation and wiring workload
• Spare replacement and monitoring function expansion upgrade for existing 3500 series TSI protection racks