Bently Nevada 3500/40-02-01 Radial Vibration/Axial Displacement Monitoring Module

Bently Nevada 3500/40-02-01 Radial Vibration/Axial Displacement Monitoring Module
Product Overview
3500/40-02-01 is a 4-channel Proximitor Monitor module produced by Bently Nevada Corporation in the United States. It is the core I/O component of the 3500 series online mechanical vibration monitoring and protection system, designed specifically for radial vibration and axial displacement monitoring of large rotating machinery. It is widely used for mechanical protection of key equipment such as turbines, compressors, fans, pumps, and generators.

📌 Model interpretation: 3500/40-02-01 → 40=preamplifier monitor | 02=with external terminals | 01=no explosion-proof certification

Model Interpretation
Meaning of field codes
3500 Bently Nevada 3500 Series Mechanical Monitoring System
40-4-channel Proximitor Monitor
02- Displacement I/O module with external terminals (External Terminals)
01- No approval agency certification option (CN explosion-proof certification is 00)
Core technical parameters
Parameter specifications
Brand Bently Nevada (under GE)
3500 series mechanical vibration monitoring and protection system
Module type 4-channel Proximitor Monitor
Number of channels: 4 channels (can be configured in pairs, up to 2 monitoring functions)
I/O terminal type ✅ External Terminals (Option 02)
Input signal Bently Nevada 3300XL/3300XL NSv eddy current sensor (eddy current probe)
Configurable functions include radial vibration/axial displacement/differential expansion/shaft eccentricity/REBAM ®
Sensitivity (radial vibration) 3.94 mV/µ m (100 mV/mil) or 7.87 mV/µ m (200 mV/mil)
Sensitivity (axial displacement) 3.94 mV/µ m (100 mV/mil) or 7.87 mV/µ m (200 mV/mil)
Sensitivity (differential expansion) 0.394 mV/µ m (10 mV/mil) or 0.787 mV/µ m (20 mV/mil)
Sensitivity (REBAM) ®） 40 mV/µ m (1000 mV/mil) or 80 mV/µ m (2000 mV/mil)
Direct frequency filtering user programmable: 4 Hz~4000 Hz or 1 Hz~600 Hz
Gap filtering -3dB at 0.09 Hz (axial displacement/differential expansion); -3dB at 0.41 Hz
1X/2X vector filter Q remains constant, with a minimum stopband attenuation of -57.7 dB
Accuracy (direct frequency/gap): ± 0.33% of full range, ± 1% maximum
Accuracy (1X/2X): Full scale ± 0.33%, maximum ± 1%
Accuracy (Smax) maximum ± 5%
Alarm settings: Warning alarms can be set for each static value; Any two static values can set a danger alarm
Alarm delay warning: 1-60 seconds (1-second interval); Danger: 0.1 seconds or 1-60 seconds (0.5 second interval)
Output signal front panel BNC buffer output (per channel); 4-20 mA proportional output (optional)
Sensor power supply -24 VDC (short circuit protection)
Working voltage 24 VDC (powered by 3500/15 frame power supply)
Working temperature -30 ° C~+65 ° C (internal/external terminal I/O module)
Storage temperature -40 ° C~+85 ° C
Rated power consumption of 7W
Front panel LED ✅ OK / TX/RX / BYPASS
Protection level IP20 (installed inside the cabinet)
Installation method: 19 inch EIA rail/panel opening/wall mounted
The framework occupies one full height slot
3500 Rack Configuration Software
Compliant with API 670 (American Petroleum Institute Mechanical Protection Standard)
Order number 3BHE003680R0101 (corresponding to 3500/40-02-01-00-00)
Production Status ⚠️ Stopped production, the market is dominated by inventory/disassembled parts
System architecture and working principle
┌──────────────────────────────────────────────────────────────┐
│ 3500 Series Monitoring System Framework │
│ │
│ ┌─────────┐ ┌─────────┐ ┌─────────┐ ┌──────────────┐ │
│ │3500/15 │ │3500/22 │ │3500/40 │ │ 3500/32/33 │ │
││ Power module ││ TDI module ││ -02-01 ││ Relay module ││
││ (Dual Redundancy) ││ (Communication Interface) ││ Monitor ││ (Trip Output) ││
│ └────┬────┘ └────┬────┘ └────┬────┘ └──────┬───────┘ │
│ │ │ │ │ │
││ TDI bus ││││
│ │◄═══════════►│◄══════════►│ │ │
│ │ │ │ │ │
│ ┌────▼────────────▼────────────▼───────────────▼────────┐ │
││ 3500/05 Instrument Frame ││
│ │ ┌─────────────────────────────────────────────────┐ │ │
│││ 3500/40-02-01 Monitor │││
│ │ │ ┌──────────┐ ┌──────────┐ ┌──────────┐ ┌──────┐│ │ │
││││ Channel 1 ││ Channel 2 ││ Channel 3 ││ Channel 4 ││││
││││ Radial vibration ││ Axial displacement ││ Differential expansion/eccentricity ││ REBAM ││││
││││ (X/Y probe) ││ (thrust probe) ││ (differential expansion probe) ││││
│ │ │ └────┬─────┘ └────┬─────┘ └────┬─────┘ └──┬───┘│ │ │
│ │ └───────┼────────────┼────────────┼──────────┼────┘ │ │
│ │ │ │ │ │ │
│ └──────────┼────────────┼────────────┼──────────┼───────┘ │
│ │ │ │ │ │
│ ┌───────▼───┐ ┌─────▼─────┐ ┌────▼────┐ ┌──▼──────┐ │
││ 3300XL Probe ││ 3300XL Probe ││ 3300XL ││ 3300XL ││
││ (Radial Vibration) ││ (Axial Displacement) ││ (Differential Expansion) ││ (REBAM) ││
│ └───────────┘ └───────────┘ └─────────┘ └─────────┘ │
│ │ │ │ │ │
│ ┌────▼──────┐ ┌─────▼─────┐ ┌──▼───────┐ ┌──▼──────┐ │
││ Turbine ││ Thrust Bearing ││ Differential Expansion Measurement ││ Bearing Monitoring ││
││ Radial vibration ││ Axial displacement ││ Rotor expansion ││ Oil film oscillation ││
│ └───────────┘ └───────────┘ └──────────┘ └─────────┘ │
└──────────────────────────────────────────────────────────────┘
Paired configuration rules for channels
Channel pair executable functions (up to 2 types)
Channel 1+Channel 2 radial vibration/axial displacement/differential expansion/eccentricity/REBAM ® (Choose one or a combination)
Channel 3+Channel 4 radial vibration/axial displacement/differential expansion/eccentricity/REBAM ® (Choose one or a combination)

⚠️ Note: Each channel can only perform up to 2 monitoring functions. For example, channel 1+2=radial vibration+axial displacement; Channel 3+4=differential expansion+eccentricity.

core functionality
Function Description
🎯 Radial vibration monitoring receives X/Y eddy current probe signals and generates direct vibration amplitude, 1X/2X amplitude and phase Smax、 Non 1X and other parameters
📏 Axial displacement monitoring receives thrust probe signals to monitor the axial position of the rotor and prevent damage to the thrust bearing
📐 Differential expansion monitoring monitors the relative expansion difference between the rotor and cylinder to prevent dynamic and static friction
🔘 Axis eccentricity monitoring monitors rotor eccentricity and determines bending and alignment status
🔄 REBAM ® Anti vortex bearing monitoring, detecting oil film oscillation and instability
⚡ Double alarm for each static value → warning alarm; Any two static values → danger alarm
🛡️ self-diagnosis ✅ Sensor integrity check, OK detection, bypass mode
🔌 External terminal ✅ Option 02: Connect on-site wiring to external terminal blocks to improve crowding on the back of the cabinet
📊 BNC buffer output, front panel BNC interface for each channel, 550 Ω output impedance, used for oscilloscope/external recording
🌡️ Filter tracking supports automatic switching of filters based on rotational speed (low-end/rated/high-end)
Comparison of 3500/40 series models
Model Terminal Type Characteristics 4-20mA Output Order Number
⭐ 3500/40-01-00 Internal Terminal Standard Type (Basic Version of this Series) ❌ No 176449-01
⭐ 3500/40-02-00 External Terminal ⭐ This product (3500/40-02-01 belongs to this category) ❌ No 125680-01
3500/40-03-00 External Terminal TMR Triple Redundancy ❌ None –
3500/40-04-00 internal terminal with internal safety barrier (4 x displacement/acceleration) ❌ No 135489-01
3500/40-05-00 internal terminal with internal safety barrier (2 x displacement+2 x speedometer) ❌ No 135489-02
3500/40-06-00 internal terminal with internal safety barrier (4 x speedometer) ❌ No 135489-03
3500/42-01-00 Internal Terminal Displacement/Velocity/Acceleration Monitor (with stronger functionality) ✅ There is 176449-02
3500/42M-01-00 internal terminal with 4-20mA output ✅ There is 140734-02
3500/45-01-00 Internal Terminal Differential Expansion/Axial Position Special ❌ No 176449-04
3500/50-01-00 Internal Terminal Speed Monitoring ❌ No 288062-02