Description
BENTLEY NEVADA 3500/53M Electronic Overspeed Detection Module
1. Product Description
The BENTLEY NEVADA 3500/53M is a dual-channel electronic overspeed detection module designed for critical rotating machinery in industries such as oil & gas, power generation, and manufacturing. Built for high reliability, it monitors shaft speed and acceleration using inputs from proximity probes or magnetic sensors. The module features programmable trip points, dual-channel redundancy, and real-time diagnostics to prevent catastrophic failures. Compliant with API 670 and API 612 standards, it integrates seamlessly with the 3500 Series framework for centralized monitoring, ensuring fast response times (<50 ms) and fail-safe operation.
2. Product Parameters
| Parameter | Specification |
|---|---|
| Model | 3500/53M |
| Channels | 2 channels (dual redundancy) |
| Input Types | Eddy current proximity probes or magnetic sensors |
| Speed Range | 0–100,000 RPM (programmable) |
| Accuracy | ±0.01% of reading |
| Power Supply | 24 Vdc ±10% (redundant supply recommended) |
| Communication | Ethernet, Modbus RTU, CAN |
| Temperature Range | -30°C to +65°C (operating) |
| Outputs | 4–20 mA analog, digital relays (2-out-of-2/3 voting logic) |
| Dimensions | 241.3 mm × 24.4 mm × 241.8 mm |
3. Advantages and Features
- Dual-Channel Redundancy: Ensures continuous operation even if one channel fails, reducing downtime risks.
- Rapid Response: Detects overspeed in <50 ms, enabling immediate shutdown to protect machinery.
- API Compliance: Meets strict safety standards for critical machinery protection.
- Built-in Diagnostics: Monitors sensor health, communication integrity, and system status.
- Flexible Voting Logic: Supports 2-out-of-2 or 2-out-of-3 configurations for tailored safety.
4. Application Areas and Case Studies
- Oil & Gas: Protecting offshore platform turbines and compressors.
- Power Generation: Monitoring steam turbines in thermal power plants.
- Manufacturing: Controlling conveyor systems in automotive factories.
Case Study: A Middle Eastern refinery reduced unplanned shutdowns by 30% by deploying the 3500/53M to detect overspeed in centrifugal pumps, saving $150,000 annually through predictive maintenance.

5. Competitor Comparison
The 3500/53M stands out due to:
- True Dual-Channel Redundancy: Unlike many single-channel alternatives.
- Faster Trip Response: 50 ms vs. 80–100 ms in comparable systems.
- Integrated API 670 Compliance: Eliminating the need for additional safety modules.
6. Selection Recommendations
- Complex Systems: Ideal for multi-unit setups requiring fail-safe redundancy.
- High-Risk Environments: Recommended for applications where overspeed could lead to costly damage.
- Integration: Pair with the 3500 Series rack for centralized data logging and analysis.
7. Precautions
- Sensor Calibration: Ensure probes are aligned within 0.5–1.5 mm for eddy current sensors.
- Power Redundancy: Use dual power supplies to avoid single-point failures.
- Firmware Updates: Regularly update firmware via BENTLY’s 3500 组态软件 for security and feature enhancements.
山西鑫业达国际贸易有限公司 specializes in BENTLY NEVADA 3500/53M and automation spare parts. Visit www.xydcontrol.com for sales and technical support.


