Bently Nevada 3500/42M 182229-01 Seismic Vibration Monitoring Module

I. Complete Explanation of Model Number
Module Model: 3500/42M (Proximitor/Seismic Monitor Eddy Current + Seismic Integrated Monitoring Card)
Front Card Part Number: 182229-01 (Standard General-purpose Front Processing Motherboard, without built-in safety barrier)
Compatible Rear I/O Terminal Board: 128229-01 (Must be used in a complete set with the front card; neither can be missing)
System Affiliation: Baker Hughes Bently 3500 TSI Unit Protection System, compliant with API670 standard, SIL2 safety level

Core Positioning
3500 System Universal Four-Channel Monitoring Card, compatible with both eddy current displacement probes (shaft vibration, axial displacement, differential expansion, eccentricity) + velocity/acceleration seismic probes (bearing absolute vibration); each channel is independently configurable in pairs, one card can simultaneously monitor shaft and bearing vibration, standard for thermal power / chemical turbine.

Hardware Basic Parameters
Channel Specifications: 4 fully independent programmable channels (Channel 1/2 as one group, Channel 3/4 as another group)
Sensor Compatibility
Eddy Current Probe: 3300XL Series (330104/330704), providing -24VDC probe power supply
Seismic Sensor: Electromagnetic speed sensor, piezoelectric acceleration sensor
Electrical Power Consumption: Typical 7.7W, unified power supply from the rack backplane
Input Impedance: Eddy Current/Acceleration standard input 10kΩ; TMR Tri-redundancy version 50kΩ
Environmental Temperature Range: Working -40°C ~ +65°C; Storage -40°C ~ +85°C
Size: 3500 standard single-slot full-height module, supports hot-swappable rack
Front Panel Indicator Lights
OK: Module power supply and self-check are normal
TX/RX: Rack backplane bus communication flashes
BYPASS: Channel/Module bypass activation

Supported Measurement Functions (Software Free Configuration)
Each group of channels can choose one monitoring mode. Two groups of the same card can be configured with different functions:
Axial Radial Vibration (Peak-to-Peak)
Thrust Axial Displacement
Rotor Differential Expansion (Cylinder Expansion Difference)
Axial Eccentricity
REBAM Bearing Wear Monitoring
Bearing Speed Vibration (Vibration Intensity)
Acceleration Vibration
Axial Absolute Vibration (Axial Vibration + Bearing Vibration Synthesis)
Circular Acceptable Zone (Trajectory Protection)

Signal Output Capability (Realized by Terminal Board 128229-01)
4 Independent 4-20mA Analog Transmitters: Real-time measurement values of each channel are uploaded to DCS/PLC
Channel Fault Relay Contacts: Probe disconnection, short circuit, module fault alarm
SMB Buffer Output Port: Original waveform connected to an oscilloscope for fault diagnosis
Internal Backplane Bus: Upload all real-time data, alarms, event logs to 3500/92 Gateway

 Alarm Protection Logic
Dual Threshold分级 Protection for Each Channel：
Alert (Warning)： Sound and light alarm， only prompts without interlock shutdown
Danger (Danger)： Hard contact output for interlock， triggering unit shutdown
Built-in probe disconnection/short circuit self-check， fault retention， can record historical alarm events