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- Bently Nevada
- 3500/77 143729-01
- Cylinder Pressure Monitor I/O Module
- USA
- 263 mm × 58 mm × 28 mm
- 1kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
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We provide 7*24 hours service to our customers. We will be there whenever you need us.
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All our products are priced very favorably because we have our own warehouse and supply.
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📦 Product Overview: Bently Nevada 3500/77 143729-01
The Bently Nevada 3500/77 143729-01 is a Cylinder Pressure I/O Module, part of the 3500 Series Machinery Protection System. This module is engineered for high-speed monitoring of cylinder pressure in reciprocating compressors, providing essential diagnostic data and protection alarms.
It processes analog input signals from cylinder pressure transducers and delivers conditioned outputs to the 3500 monitoring rack. With four input channels, it supports real-time tracking of cylinder conditions such as suction pressure, discharge pressure, peak pressure, minimum pressure, and compression ratio.
📊 Technical Specifications
| Parameter | Description |
|---|---|
| Model | 3500/77 143729-01 |
| Type | Cylinder Pressure I/O Module |
| Series | 3500 Series Machinery Protection System |
| Brand | Bently Nevada |
| Input Channels | 4 independent pressure input channels |
| Compatible Transducers | Cylinder pressure sensors / transducers |
| Signal Processing | Signal conditioning: filtering, amplification, conversion |
| Alarm Functions | Programmable Alert and Danger setpoints |
| Output | Processed data to 3500 rack system bus |
| Application | Reciprocating compressor monitoring / cylinder diagnostics |
| Mounting | Slot-in module, compatible with 3500 rack |
| Dimensions | Approx. 263 mm × 58 mm × 28 mm |
| Weight | Approx. 1.0 kg |
| Power Supply | 24 VDC typical (shared via rack power) |
| Operating Temperature | −20°C to +70°C (standard industrial range) |
| Certifications | Varies by model; ATEX/IECEx optional in certified variants |
| Enclosure Type | Module-style, internal or external termination |
| Warranty | Typically 1 year |
🛠️ Applications
The 3500/77 module is designed for critical industrial systems that require detailed pressure diagnostics in reciprocating compressors, especially in:
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Oil & Gas Fields
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Petrochemical Plants
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Compressor Stations
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Natural Gas Distribution Facilities
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Power Generation Units
It’s used in predictive maintenance, real-time monitoring, and machine protection workflows to detect cylinder wear, leakage, inefficiencies, and pressure abnormalities early.
✅ Product Features & Advantages
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High-Channel Monitoring: Supports 4 pressure transducer inputs, covering multiple cylinders per module.
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Comprehensive Pressure Variables: Measures peak, minimum, suction, discharge pressures and compression ratio.
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Advanced Signal Conditioning: Filters and processes raw transducer signals for stable, accurate output.
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Integrated System Compatibility: Seamlessly connects with the 3500 system backplane and software interface.
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Programmable Alarm Points: Set and adjust alert/danger thresholds to prevent downtime and protect machinery.
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Modular Design: Hot-swappable and replaceable within the 3500 rack, reducing downtime during maintenance.
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Field-Proven Durability: Built to operate in harsh environments with industrial-grade reliability.
🔗 Brand & Series
| Field | Description |
|---|---|
| Brand | Bently Nevada |
| Parent Company | (Omitted as per request) |
| Product Series | 3500 Series Machinery Protection |
| Module Type | Pressure I/O Module |
| Form Factor | Slot-in rack-mounted module |
🔁 Related or Compatible Models from the Same Series
| Model | Function | Channels | Temp Range | Dimensions (mm) | Weight |
|---|---|---|---|---|---|
| 3500/77M 176449-07 | Cylinder Pressure Monitor (Std. version) | 4 | −20°C to +70°C | 263×58×28 | ~0.4 kg |
| 3500/77M 143729-01 | Cylinder Pressure I/O Module | 4 | −20°C to +70°C | 263×58×28 | ~1.0 kg |
| 3500/77M 140734-07 | Pressure Monitoring Module (Alt build) | 4 | −40°C to +85°C | Standard slot size | ~0.9 kg |
| 3500/70M Velocity | Vibration Velocity Monitor | 4 | −40°C to +70°C | ~240×50×30 | ~0.82 kg |
| 3500/72M Rod Position | Rod Position Monitor for Recips | 4 | −20°C to +70°C | Standard slot size | ~1.0 kg |
⭐ 5 Popular Models from Bently Nevada (Same Brand)
| Model | Function | Channels | Signal Type | Dimensions (mm) | Weight |
|---|---|---|---|---|---|
| 3500/40M Proximitor | Shaft Displacement / Vibration | 4 | Proximity Probes | 263×58×28 | ~0.9 kg |
| 3500/60 Temp Monitor | Temperature (RTD/TC) | 6 | Thermocouples, RTD | 263×58×28 | ~0.82 kg |
| 3500/65 Temp Monitor | 16-channel Temperature Monitoring | 16 | RTD/Thermocouples | 263×58×28 | ~0.91 kg |
| 3500/42M Proximitor/Seismic | Displacement and Seismic Monitoring | 4 | Prox + Seismic | 263×58×28 | ~1.0 kg |
| 3500/45 Position Monitor | Valve or Shaft Position | 4+ | Linear or rotary pos | 263×58×28 | ~0.85 kg |
❓ 10 FAQs (Structured as Q&A)
Q1: How many cylinder pressures can this module monitor?
A1: The 3500/77 143729-01 supports up to 4 individual channels, meaning it can monitor pressure from 4 different cylinders at the same time.
Q2: Can it work with any pressure transducer?
A2: Not all transducers are compatible. It is recommended to use Bently Nevada-approved pressure sensors to ensure signal integrity and proper operation.
Q3: Are the alarm limits adjustable?
A3: Yes. You can configure Alert and Danger setpoints through the 3500 system interface for each measured parameter.
Q4: What happens if one channel fails?
A4: The module is designed with channel independence. If one channel malfunctions, the remaining three continue to operate normally, but you should replace or service the module promptly.
Q5: Is this module certified for hazardous areas?
A5: Not all variants are certified. If required, use versions with ATEX, IECEx, or UL Class I Div 2 certifications or install the module in a certified enclosure.
Q6: What’s the typical service life of this module?
A6: With proper installation and environmental control, the module can last 5-10+ years. Preventive maintenance and diagnostics extend its lifespan.
Q7: Can I monitor data remotely?
A7: Yes, via the 3500 rack and compatible monitoring software, data can be streamed to DCS or remote systems.
Q8: What is compression ratio monitoring?
A8: The module calculates the ratio of discharge to suction pressure per cycle, helping diagnose inefficiencies, leaks, or valve issues.
Q9: What kind of diagnostic data can it provide?
A9: Apart from raw pressure values, it provides peak/minimum pressure, compression ratio, and alarm status, enabling predictive diagnostics.
Q10: What if the pressure exceeds limits?
A10: When pressure values surpass Danger setpoints, the module signals the 3500 system to trigger alarms or machine shutdown protocols, preventing catastrophic damage.
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All product specifications are original and authentic imported products. We have an annual sales volume of 300 million yuan, and we only produce original and authentic products. All customers who cooperate with us directly online can enjoy low discounts.
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We have a complete range of product models, 80% of conventional models are in stock, and we have established channels in Asia, Africa, North America, South America, and Europe, effectively shortening the order processing time and satisfying customers in a timely manner.
Technical Team
Fast delivery. Spot goods can be shipped on the same day, and the delivery time transaction is 20% faster than that of peers on average, with a delivery time accuracy rate of 99%.
Thoughtful after-sales service
24-hour after-sales service guarantee team, professional and standardized management service system.