Intelligent Rotational Reference for Demanding Industrial Applications
The Bently Nevada 3500/25-02-01-CN Enhanced Keyphasor Module is a premium rotational reference module designed for the Bently Nevada 3500 Machinery Protection System. This configuration includes two half-height, two-channel Enhanced Keyphasor modules, providing a total of four independent Keyphasor channels for sophisticated machinery protection and condition monitoring systems. It accepts input signals from proximity probes or magnetic pickup sensors and converts them into highly accurate digital Keyphasor signals for shaft speed, phase reference, and synchronized vibration analysis.
The CN approval option is intended for country-specific approvals, including Chinese NEPSI hazardous-area marking where applicable, making this configuration well suited for projects requiring regional compliance while maintaining the proven reliability of the 3500 platform. Combined with internal termination I/O modules and enhanced signal processing, the 3500/25-02-01-CN offers dependable performance for mission-critical rotating equipment.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model | 3500/25-02-01-CN |
| Product Type | Enhanced Keyphasor Module |
| Series | 3500 Machinery Protection System |
| Configuration | 02-01-CN |
| Module Quantity | Two Half-Height Modules |
| Total Channels | 4 Keyphasor Input Channels |
| I/O Module Type | Internal Terminations |
| Input Types | Proximity Probes, Magnetic Pickup Sensors |
| Primary Function | Shaft Speed, Phase Reference & Rotational Timing |
| Signal Processing | Digital Keyphasor Signal Generation |
| Buffered Outputs | Front and Rear Buffered Outputs |
| Firmware | Field Upgradeable |
| Approval Option | CN – Country-Specific Approval (including applicable NEPSI certification) |
| Installation | Half-Height Slots in 3500 Rack |
| Dimensions | 119.9 × 24.4 × 256.5 mm (each module) |
| Weight | Approximately 0.34 kg (each module) |
Typical Applications
The 3500/25-02-01-CN is designed for industrial environments where precise rotational reference and reliable machinery diagnostics are essential.
Typical applications include:
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Steam turbine protection systems
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Gas turbine monitoring
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Centrifugal compressor control
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Turbo-expander monitoring
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Industrial generator protection
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High-speed gearbox diagnostics
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Power generation facilities
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Oil and gas production platforms
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Petrochemical processing plants
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Heavy manufacturing industries
Performance Advantages
Designed for continuous industrial operation, the 3500/25-02-01-CN delivers dependable Keyphasor signals that improve machinery diagnostics and operational reliability.
Key advantages include:
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Four independent Keyphasor channels using dual monitoring modules
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Accurate shaft speed and phase reference measurements
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Internal termination design simplifies installation
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Compatible with proximity probes and magnetic pickup transducers
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Enhanced digital signal processing improves measurement accuracy
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Field-upgradable firmware protects long-term investment
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Full compatibility with existing 3500 Machinery Protection Systems
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Country-specific approval option for regional compliance requirements
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Compact half-height architecture maximizes rack capacity
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Supports predictive maintenance and minimizes unplanned downtime
Technical FAQs
1. What is the primary purpose of the 3500/25-02-01-CN Enhanced Keyphasor Module?
It generates precise digital Keyphasor signals used for shaft speed measurement, phase reference, and synchronized vibration analysis within the 3500 Machinery Protection System.
2. What does the "02" channel option indicate?
The 02 option specifies two half-height two-channel Keyphasor modules, providing a total of four independent Keyphasor input channels.
3. What does the "01" I/O configuration represent?
It indicates an I/O module with internal terminations, allowing field wiring to terminate directly on the rear I/O assembly inside the 3500 rack.
4. What does the "CN" approval option mean?
The CN option represents country-specific approvals. For this configuration, it includes documentation and certifications applicable to selected regional markets, including Chinese NEPSI hazardous-area approval where required.
5. Which sensors can be connected?
The module supports Bently Nevada proximity probes and compatible magnetic pickup sensors, depending on the selected application.
6. Is this module compatible with legacy 3500 systems?
Yes. The Enhanced Keyphasor Module maintains backward compatibility in form, fit, and function with previous-generation 3500 Keyphasor modules, simplifying upgrades.
7. Does it support firmware upgrades?
Yes. Field-upgradable firmware enables future feature enhancements and simplifies long-term maintenance.
8. What are the physical dimensions and weight?
Each module measures 119.9 × 24.4 × 256.5 mm and weighs approximately 0.34 kg, making it suitable for installation in standard half-height slots of the 3500 rack.
9. Why are Keyphasor signals important?
Keyphasor signals provide an accurate rotational timing reference that enables shaft speed calculation, phase measurement, synchronous vibration analysis, and advanced machinery diagnostics.
10. Why choose the Bently Nevada 3500/25-02-01-CN?
Its four-channel architecture, enhanced digital processing, regional approval options, dependable industrial performance, and seamless integration with the 3500 Machinery Protection System make it an excellent solution for protecting critical rotating assets.
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