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- Bently Nevada
- 3500/25 125792-01
- Enhanced Keyphasor Module I/O 3500-25
- USA
- 206 mm × 32 mm × 190 mm
- 0.34kg
- Xiamen, China
- New & In Stock
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Product Overview: Bently Nevada 3500/25 125792‑01 Enhanced Keyphasor Module
The 3500/25 125792‑01 is an enhanced Keyphasor® signal-conditioning module from the 3500 machinery protection system. It processes input from proximity probes, magnetic pickups, or optical sensors and generates precise phase-reference pulses synchronized to shaft rotation. Designed for demanding industrial environments, it enables accurate vibration phase analysis, speed tracking, and real-time fault detection.
Brand and Series
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Brand: Bently Nevada
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Series: 3500 Machinery Protection System – Keyphasor signal conditioning modules
Applications
This module is essential for applications requiring precise phase reference in rotating machinery, including:
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Turbine vibration and blade-pass analysis
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Compressor surge/stall detection
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Pump cavitation and misalignment diagnosis
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Generator eccentricity and alignment monitoring
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Marine propulsion shaft torsional vibration tracking
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Harsh environments such as offshore platforms and Arctic or desert installations
Key Features & Advantages
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Phase‑accurate signal output allows reliable 1× RPM synchronization and phase-based diagnostics.
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Dual‑sensor redundancy and voting logic mitigate single-channel failures.
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Configurable pulse width (5°–330°) and adjustable filters (low-pass and notch) enhance signal fidelity.
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Built‑in diagnostics via LEDs and adaptive conditioning ensure signal health monitoring.
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Hot‑swappable design facilitates maintenance without interrupting system operation.
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Ruggedized build, extensive temperature rating, and safety compliance (SIL 2, API 670) ensure reliability in extreme conditions.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 3500/25 125792‑01 |
| Function | Keyphasor signal conditioning (phase reference) |
| Input Types | Proximity probes, magnetic pickups, optical encoders |
| Channels | 1 channel (supports dual‑sensor redundancy) |
| Phase Accuracy | ±0.5° at 1× RPM |
| Frequency Range | Up to 12,000 RPM (0.3 Hz and above) |
| Pulse Output | TTL or analog 0–10 VDC |
| Pulse Width | 5° to 330° configurable |
| Filter Options | Low‑pass (1–1,000 Hz), notch (50/60 Hz) |
| Power Consumption | ~2.5 W @ 24 VDC |
| Operating Temperature | –40 °C to +85 °C |
| Dimensions (H × W × D) | 206 mm × 32 mm × 190 mm |
| Weight | 0.34 kg |
| Certifications | SIL 2, API 670, hazardous‑area capable |
Related Models in the Same Series
| Model | Function | Channels | Dimensions | Weight (kg) |
|---|---|---|---|---|
| 3500/42M | Dual‑channel vibration monitoring | 2 | — | — |
| 3500/15 | Power supply module | — | — | — |
| 3500/22M | Transient data interface (TDI) | — | — | — |
| 3300 XL Proximitor | Proximity sensor (outside series) | — | — | — |
| 3500/32M | 4‑channel relay output | 4 | — | — |
Popular Models from the Same Brand
| Model | Function | Channels | Dimensions | Weight (kg) |
|---|---|---|---|---|
| 3500/45 | Position monitor | 4 | ~112 × 91 × 28 mm | ~0.20 kg |
| 3500/65 | 16‑channel temperature monitor | 16 | 483 × 178 × 89 mm | ~7.7 kg |
| 3500/46M | Hydro turbine vibration monitor | 4 | — | — |
| 3500/44M | Aeroderivative GT vibration monitor | 4 | — | — |
| 3500/61 | Temperature monitor with recorders | 6 | — | — |
FAQ – Frequently Asked Questions
Q1: What signals does the module process?
A1: It processes input from proximity probes, magnetic pickups, or optical encoders to generate phase-reference pulses.
Q2: How accurate is the phase reference output?
A2: It provides phase accuracy of ±0.5° at 1× RPM.
Q3: Can it support redundant sensors?
A3: Yes, dual-sensor redundancy with voting logic is supported.
Q4: Is pulse width adjustable?
A4: Yes, configurable from 5° to 330°.
Q5: How does it resist electrical interference?
A5: It includes low-pass and 50/60 Hz notch filters for noise suppression.
Q6: Does the module require shutdown for servicing?
A6: No, it is hot-swappable to allow live replacement.
Q7: Is it suitable for extreme temperatures?
A7: Yes, it operates reliably between –40 °C and +85 °C.
Q8: What certifications does it hold?
A8: It is compliant with SIL 2, API 670, and hazardous-area standards.
Q9: What are its dimensions and weight?
A9: Measures 206 × 32 × 190 mm and weighs 0.34 kg.
Q10: What is its typical power consumption?
A10: Approximately 2.5 W at 24 VDC.