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BENTLY 3701/55 Product Specification
Product Overview：BENTLY 3701/55
The BENTLY 3701/55 is a high-precision vibration monitoring module designed for industrial machinery protection systems, engineered by BENTLY NEVADA, a global leader in condition monitoring solutions. As part of the 3700 Series, this module is optimized for real-time vibration analysis in rotating equipment, such as turbines, compressors, and pumps, ensuring early detection of mechanical anomalies to prevent costly downtime. The BENTLY 3701/55 supports dual-channel vibration measurement, integrating proximity probe and velocity sensor inputs to provide comprehensive insights into shaft and casing dynamics.
Featuring a compact design and rugged construction, the BENTLY 3701/55 is built to withstand harsh industrial environments while delivering reliable performance. It offers software-configurable alarm thresholds and trend analysis capabilities, enabling users to customize monitoring parameters based on specific machinery requirements. The module’s compatibility with BENTLY’s 3500 Series Platform ensures seamless integration with existing automation systems, making it a versatile choice for retrofits or new installations. By combining advanced signal processing with robust hardware, the BENTLY 3701/55 plays a critical role in predictive maintenance strategies, extending equipment lifespan and enhancing operational efficiency.
In automation architectures, the BENTLY 3701/55 acts as a frontline diagnostic tool, converting raw vibration data into actionable insights. Its dual-channel design allows simultaneous monitoring of both radial and axial vibrations, providing a comprehensive view of machinery health. With real-time data transmission via analog outputs and digital communication protocols, the module empowers engineers to make data-driven decisions, reducing reliance on reactive maintenance and improving overall plant reliability.
Technical Specifications：BENTLY 3701/55
| Parameter Name | Parameter Value |
|---|---|
| Product Model | BENTLY 3701/55 |
| Manufacturer | BENTLY NEVADA |
| Product Type | Dual-Channel Vibration Monitoring Module |
| Input Channels | 2 channels (proximity probe and velocity sensor) |
| Frequency Range | 0–10 kHz (proximity), 2–1000 Hz (velocity) |
| Output Signals | 4–20 mA analog, RS-485 digital |
| Power Supply | 24 VDC ±10% |
| Physical Dimensions | 102 mm (W) × 152 mm (H) × 203 mm (D) |
| Weight | 1.5 kg |
| Enclosure Rating | IP20 (rack-mounted) |
| Operating Temperature | -25°C to +60°C |
| Communication Protocol | Modbus RTU |
| Certifications | CE, UL |
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Main Features and Advantages：BENTLY 3701/55
Dual-Channel Versatility: The BENTLY 3701/55 supports simultaneous monitoring of two vibration channels, allowing users to track both shaft displacement (via proximity probes) and casing vibration (via velocity sensors). This dual functionality provides a holistic view of machinery health, essential for identifying complex issues like misalignment or bearing wear.
Real-Time Analytics: Built-in signal processing algorithms enable real-time calculation of key vibration parameters, such as peak-to-peak displacement, RMS velocity, and overall amplitude. These metrics are transmitted via analog outputs and digital interfaces, facilitating integration with PLCs, HMIs, and predictive maintenance software.
Rugged Industrial Design: Constructed with a metal enclosure and conformal-coated PCBs, the module resists dust, moisture, and electromagnetic interference (EMI). Its wide temperature range and vibration tolerance make it suitable for harsh environments, including offshore platforms, power plants, and manufacturing facilities.
Configurable Alarm System: Users can set independent alarm and trip thresholds for each channel via BENTLY’s configuration software. This flexibility ensures the module adapts to diverse machinery requirements, from low-speed pumps to high-speed turbines.
Modular Integration: As part of the 3700 Series, the BENTLY 3701/55 can be combined with other modules (e.g., temperature monitors, speed probes) to create a fully integrated condition monitoring system. This scalability allows for incremental system upgrades as maintenance strategies evolve.
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Application Areas：BENTLY 3701/55
The BENTLY 3701/55 is widely deployed in industries where machinery reliability is non-negotiable:
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Oil and Gas:
- Monitors vibration in centrifugal compressors, pumps, and motors in refineries and offshore platforms, ensuring continuous operation and safety compliance.
- Detects early signs of cavitation or mechanical looseness in high-pressure fluid systems.
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Power Generation:
- Analyzes vibration in steam turbines, generators, and fans to optimize performance and prevent unexpected outages.
- Supports condition-based maintenance programs in combined cycle power plants and renewable energy facilities.
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Manufacturing:
- Controls vibration in high-speed rotating machinery, such as CNC lathes and conveyor drives, to maintain production quality and reduce downtime.
- Integrates with SCADA systems for real-time monitoring of production lines in automotive and pharmaceutical industries.
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Water/Wastewater Treatment:
- Ensures reliable operation of pumps and aerators by detecting imbalance or bearing failure in wastewater treatment plants.
- Provides early warning of mechanical issues in water distribution systems, minimizing service disruptions.
Related Products：BENTLY 3701/55
- BENTLY 3706/55: A four-channel vibration module offering expanded monitoring capabilities for multi-axis machinery, ideal for complex turbine systems.
- BENTLY 3704/55: A single-channel variant for simpler applications, providing cost-effective vibration monitoring for small pumps or fans.
- BENTLY 3500/22M: A complementary module in the 3500 Series, specialized for shaft vibration analysis and compatible with the BENTLY 3701/55 in hybrid monitoring systems.
- BENTLY 3708/55: A temperature and vibration combo module, integrating thermal and mechanical diagnostics for comprehensive machinery health assessment.
- BENTLY 3703/90: A power supply module designed for the 3700 Series, ensuring stable energy delivery to the BENTLY 3701/55 and other rack-mounted components.
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Installation and Maintenance：BENTLY 3701/55
Pre-installation Preparation:
Before installing the BENTLY 3701/55, ensure the following:
Before installing the BENTLY 3701/55, ensure the following:
- Verify the power supply (24 VDC) and grounding to prevent electrical interference.
- Mount the module in a 19″ rack using the provided brackets, allowing adequate airflow for cooling.
- Connect proximity probes and velocity sensors according to the wiring diagram, ensuring shielded cables to minimize noise.
Maintenance Recommendations:
- Routine Checks: Monitor front-panel LED indicators monthly to confirm power and communication status. Clean dust from vents quarterly to maintain optimal performance.
- Sensor Calibration: Perform annual calibration of proximity probes and velocity sensors using BENTLY’s certified equipment to ensure measurement accuracy.
- Software Updates: Periodically update the module’s firmware via BENTLY’s configuration tool to access new features and security patches.
- Data Review: Analyze vibration trend data bi-annually to identify gradual changes in machinery behavior, such as increasing vibration levels indicating wear.
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Product Warranty：BENTLY 3701/55
Our company provides a one-year quality warranty for the BENTLY 3701/55, covering non-human-induced hardware defects. During the warranty period, we will replace any module exhibiting abnormal performance or functional failure. For discontinued models like the BENTLY 3701/55, our global inventory of legacy industrial control parts ensures rapid fulfillment of urgent orders. Additionally, our technical support team offers post-warranty maintenance and repair services, leveraging decades of expertise to keep your systems operational.
Contact Information:
Whatsapp: +86 18859254943
E-mail: sales@ygplc.com
Whatsapp: +86 18859254943
E-mail: sales@ygplc.com
Note: This description is based on technical data from BENTLY NEVADA’s official specifications and industry applications. For detailed operational guidelines, refer to the BENTLY 3701/55 user manual or contact our team for personalized support.
