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- Bently Nevada
- 3500/64M 140471-02
- Dynamic Pressure Monitor I/O Module
- USA
- 241.3 mm × 24.4 mm × 241.8 mm
- 0.82kg
- Xiamen, China
- New & In Stock
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1. Product Overview
Model: 3500/64M 140471‑02
Brand: Bently Nevada
Series: 3500 Series — Dynamic Pressure Monitoring / Machine Protection
The 3500/64M 140471‑02 is a dynamic pressure monitor module designed to plug into the 3500 rack system. It accepts signals from high‑temperature pressure transducers, monitors dynamic (band‑pass) pressure (one “measured variable” per channel), supports multiple I/O options (internal/external, with or without barriers), alarm thresholds, and provides recorder‑output capability. It is intended for protecting machinery by detecting real‑time pressure pulsations or transient events and providing alerts/alarms.
2. Technical Specifications
Below is a table of known technical parameters, including dimensions and weight:
| Parameter | Specification |
|---|---|
| Model | 3500/64M 140471‑02 |
| Function | Dynamic Pressure Monitor (band‑pass dynamic pressure) |
| Channels | Single slot monitor, supports 4 channels of pressure transducer inputs |
| Signal Type | High‑temperature pressure transducer signals; dynamic pressure (band‑pass) |
| Input Impedance | 3‑wire transducer ~10 kΩ; 2‑wire transducer ~1.5‑3.5 MΩ (typical) |
| Alarm Features | Configurable alert & danger thresholds; band‑pass corner frequencies; notch filter; per‑channel measured variable |
| Outputs | Recorder output for integration with control systems; front‑panel LEDs for OK, TX/RX, Bypass |
| Operating Voltage | Approximately 10‑30 V DC |
| Power Consumption | Around 7 Watts (typical) |
| Operating Temperature | ‑25°C to +70°C for many variants; suitable for high‑temperature sensor inputs |
| Humidity Tolerance | 0% to 95% Relative Humidity, non‑condensing |
| Protection Rating | IP65 (in some configurations) |
| Dimensions (Monitor Module) | 241.3 mm × 24.4 mm × 241.8 mm (height × width × depth) |
| Weight (Monitor Module) | 0.82 kg |
| Dimensions (I/O Module, Non‑Barrier) | 241.3 mm × 24.4 mm × 99.1 mm |
| Weight (I/O Module, Non‑Barrier) | 0.20 kg |
| Dimensions (I/O Module, With Barrier) | 241.3 mm × 24.4 mm × ~163.1 mm |
| Weight (I/O Module, With Barrier) | 0.46 kg |
3. Applications
This module is used in industrial settings requiring detection of dynamic pressure changes, often where rapid pressure pulses, vibration‑related pressure fluctuations, or transient events can damage equipment or impair operations. Common application areas include:
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Reciprocating compressor systems (monitoring piston/cylinder pressure pulses)
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Turbomachinery where pressure surges or stalls may occur
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High‑temperature process piping with pressure transients
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Situations where machinery health depends on detecting pressure band‑pass signatures rather than slow process pressures
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Integration into machinery protection systems, feeding alarms to control systems or maintenance dashboards
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Environments with mixed sensor types, or where transient interference or noise is present, requiring filter/notch capabilities
4. Advantages
Here are major advantages of using the 3500/64M 140471‑02:
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Four Channels in One Slot — Supports up to four pressure transducers in one monitor, saving rack space.
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High‑Temperature Sensor Compatibility — Can take inputs from sensors that operate at elevated temperatures.
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Band‑Pass & Notch Filtering — Allows tuning of corner frequencies and notch filters per channel to isolate relevant dynamic pressure signatures and reject interference.
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Recorder Output & Visual LEDs — Enables data capture for trend and logging; front‑panel LEDs (OK, TX/RX, Bypass) help diagnostics.
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Flexible I/O Options — Choice between internal/external terminations, with or without barriers, helps in adapting to different site wiring or safety requirements.
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Solid Environmental Specs — Operating to +70°C, humidity up to 95% non‑condensing, rated protection (IP65 in many builds) offers robust performance.
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Rapid Power‑Up & Low Power Draw — Typical power around 7 W; operation under broad supply voltages (10‑30 V DC) offers flexibility.
5. Brand & Series
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Brand: Bently Nevada
-
Series: 3500 Series — Machine Protection & Condition Monitoring
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Module Group: Dynamic Pressure / 64M family in 3500 series
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The 3500 Series is a modular protection/monitoring platform for rotating machinery, process variables, vibration, speed, temperature, etc.
6. Related / Same‑Series or Close Models
Here are 5 similar or related models (same series / close functionality), with key parameter comparison:
| Model | Function / Key Features | Channels | Dimensions (H×W×D mm) | Weight (kg) |
|---|---|---|---|---|
| 3500/64M 140471‑02 | Four‑channel dynamic pressure monitor; internal termination etc. | 4 | 241.3 × 24.4 × 241.8 mm | 0.82 kg |
| 3500/64M 176449‑05 | Monitor version of same family; 4 ch; similar dynamic pressure | 4 | roughly same monitor module size | ≈0.91 kg |
| 3500/64M 140734‑05 | Dynamic pressure monitor; alternate variant; same family | ≤4 | similar slot dimensions | ≈0.82 kg |
| 3500/64 136499‑01 | Process Variable Monitor (non‑dynamic pressure) | 6 | larger depth I/O; more channels | ~0.80 kg |
| 3500/62 136483‑01 | PV Monitor with current inputs and external terminations | 6 | similar rack module form‑factor | ~0.80 kg |
7. Popular Models from the Same Brand
Here are 5 well‑used / widely respected models in the Bently Nevada 3500 ecosystem, with parameters:
| Model | Purpose / Function | Channels / Remarks | Dimensions & Weight approximate |
|---|---|---|---|
| 3500/25 149369‑01 | Keyphasor Module (phase reference for vibration) | 1 or 2 input channels; high stability | Similar rack slot size; ~0.5‑0.8 kg |
| 3500/53 01‑00 | Overspeed Detection Module | For fast overspeed trip, digital output | Similar size; weight ~0.7‑1.0 kg |
| 3500/65 145988‑02 | Temperature Monitor, 16 channels | RTD or thermocouple inputs; many channels | Larger module; heavier – ~1.5‑2 kg |
| 3500/20 01‑00 | Rack Interface / Communication Module | Gateways, data‑aggregation, etc. | Rack slot size; ~0.9‑1.2 kg |
| 3500/60 (some model) | Temperature or Dual Temperature monitoring | 6 channels; medium number of inputs | ~0.8‑1.0 kg; rack‑compatible form‑factor |
8. Frequently Asked Questions (FAQ)
Below are 10 QA‑style FAQs written in a human style, about 3500/64M 140471‑02.
Q1: How many channels does the module support, and can I use fewer?
A: It supports four channels of dynamic pressure input; you can choose to use 1, 2, 3 or all 4 depending on your sensors, leaving others inactive.
Q2: What kind of transducers can I connect?
A: High‑temperature pressure transducers (2‑wire or 3‑wire), suitable for dynamic pressure and able to withstand elevated temperature at the sensor head.
Q3: What is band‑pass dynamic pressure, and why is it important?
A: Band‑pass dynamic pressure means the module filters the incoming pressure signal to pass only certain frequencies (band) to detect pulsations, surges, vibrations etc. This helps isolate relevant transient behavior rather than slow pressure changes.
Q4: How do I configure alarm thresholds?
A: Using the 3500 Rack Configuration Software, you can set per‑channel alert and danger thresholds (upper/lower) on the measured variable derived from the dynamic pressure signal.
Q5: What are internal vs external termination options?
A: Internal termination means wiring connections are made inside the rack or module itself, whereas external termination uses terminal blocks outside the module for field wiring. The choice depends on wiring layout and ease of access.
Q6: Does this module include notch filters and adjustable band‑pass corners?
A: Yes, indeed. It allows configuration of band‑pass corner frequencies and optional notch filters to suppress unwanted frequency components (e.g. electrical noise or other recurring interference).
Q7: What are the typical dimensions and weight, so I can plan mounting and rack space?
A: Monitor module is about 241.3 × 24.4 × 241.8 mm, weight ~ 0.82 kg. I/O modules vary: non‑barrier I/O is about 0.20 kg, barrier I/O about 0.46 kg, with extended depth.
Q8: What environmental conditions can it handle?
A: Operates typically from around ‑25°C to +70°C, humidity up to ~95% RH non‑condensing, protection rating up to IP65 in many configurations.
Q9: What power supply is required?
A: Requires DC power in the neighborhood of 10‑30 V DC, with typical power draw ~7 Watts.
Q10: What is the “recorder output” feature?
A: That is a signal output provided by the module so control systems can record or log the measured dynamic pressure variable for trend analysis, diagnostics or supervisory control (e.g. into SCADA or DCS).
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